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4052 Commits

Author SHA1 Message Date
Devang Patel
a8644e306d Cosmetic change 
"True Loop" and "False Loop" naming terminology to refer two loops
after loop cloning is confusing. Instead just use A_Loop and B_Loop.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41287 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-22 19:33:29 +00:00
Devang Patel
dc52395353 Refactor loop condition check in a separate function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41282 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-22 18:27:01 +00:00
Devang Patel
ea0fa97334 Fix thinko. 
Starting value of second loop's induction variable can not be lower 
then starting value of original loop's induction variable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41280 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-22 18:07:47 +00:00
Devang Patel
0b8e02b704 Rename bunch of variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41250 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-21 21:12:02 +00:00
Devang Patel
60cbab4252 Preserve LCSSA. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41246 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-21 19:47:46 +00:00
Devang Patel
b7211a2ce1 Use SmallVector instead of std::vector. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41207 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-21 00:31:24 +00:00
Devang Patel
1cc2ec8d20 s/ExitBlock/ExitingBlock/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41204 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-20 23:51:18 +00:00
Devang Patel
ebc5fea695 Replace indunction variable with split value in loop body. 
This fixes art miscompile.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41195 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-20 20:49:01 +00:00
Devang Patel
d651f657f2 Do not split loops rejected by processOneIterationLoop(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41194 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-20 20:24:15 +00:00
Nick Lewycky
6694e31c49 Oops, remove assert that wasn't meant to be committed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41170 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-18 23:21:28 +00:00
Nick Lewycky
c721223f73 Never insert duplicate edges. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41169 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-18 23:18:03 +00:00
Nick Lewycky
af5cbc82bb Typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41168 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-18 15:08:56 +00:00
Devang Patel
20d260a193 Avoid spliting loops where two split condition branches are not independent. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41148 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-18 00:00:32 +00:00
Devang Patel
96bf524b53 When one branch of condition is eliminated then head of the other 
branch is not necessary immediate dominators of merge blcok in all cases.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41144 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-17 21:59:16 +00:00
Owen Anderson
1defe2df5d Factor out some code into a helper function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41131 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-16 22:51:56 +00:00
Owen Anderson
62bc33c954 Add some more comments to GVN. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41129 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-16 22:02:55 +00:00
Devang Patel
7375bb9c8c Dominance frontier is now required. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41096 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-15 03:34:53 +00:00
Devang Patel
5b8ec614f5 Cleanup removeBlocks. 
Use dominance frontier to fixup incoming edges of successor blocks not domianted by DeadBB.
Use df_iterator to walk and delete basic blocks dominated by DeadBB.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41095 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-15 03:31:47 +00:00
Reid Spencer
e9dd95ad9c Remove unneeded header file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41094 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-15 03:01:04 +00:00
Devang Patel
3fe4f2135a Avoid triangle loops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41093 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-15 02:14:55 +00:00
Devang Patel
4f5d78e9c1 Break infinite loop. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41091 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 23:59:17 +00:00
Devang Patel
4e8061cbda Avoid nested loops at the moment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41090 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 23:53:57 +00:00
Devang Patel
a6a8663894 Fix dominance frontier update while removing blocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41082 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 18:35:57 +00:00
Owen Anderson
31f496755a Eliminate PHI nodes with constant values during normal GVN processing, even when 
they're not related to eliminating a load.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41081 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 18:33:27 +00:00
Owen Anderson
36057c7834 Be more aggressive in pruning unnecessary PHI nodes when doing PHI construction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41080 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 18:16:29 +00:00
Owen Anderson
3e75a42ee2 Make GVN iterative. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41078 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 18:04:11 +00:00
Owen Anderson
8e8278e7fe Fix a case where GVN was failing to return true when it had, in fact, modified 
the function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41077 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 17:59:48 +00:00
Devang Patel
ada054a9ea Handle last value assignments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41063 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 01:30:57 +00:00
Devang Patel
ebcb52aa89 StartValue is already calculated. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41062 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-14 00:15:45 +00:00
Devang Patel
21eca2a9cf Preserve simple analysis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41054 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-13 22:22:13 +00:00
Devang Patel
fc4c5f82f8 Preserve dominator info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41053 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-13 22:13:24 +00:00
Devang Patel
6acc9e6b7b If NewBB dominates DestBB then DestBB is not part of NewBB's dominance frontier. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41051 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-13 21:59:17 +00:00
Devang Patel
98147a306e Split loops and do CFG cleanup. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41029 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-12 07:02:51 +00:00
Reid Spencer
9626a9c700 Remove unused variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41028 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-12 04:45:36 +00:00
Chris Lattner
8d2e88806b Transform a load from an undef/zero global into an undef/global even if we 
have complex pointer manipulation going on.  This allows us to compile
stuff like this:

__m128i foo(__m128i x){
                static const unsigned int c_0[4] = { 0, 0, 0, 0 };
                __m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
                x  = _mm_unpacklo_epi8(x,  v_Zero);
                return x;
}

into:

_foo:
        xorps   %xmm1, %xmm1
        punpcklbw       %xmm1, %xmm0
        ret




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41022 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-11 18:48:48 +00:00
Devang Patel
423c8b29b8 Clone loop. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40998 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-10 18:07:13 +00:00
Devang Patel
4bc2a0b420 Add utility to clone loops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40997 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-10 17:59:47 +00:00
Devang Patel
acb8c09e27 Remove unncessary duplication. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40979 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-10 00:59:03 +00:00
Devang Patel
23a19f82a7 Calculate exit and start value of true loop and false loop respectively. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40978 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-10 00:53:35 +00:00
Devang Patel
bacf5193cf ExitCondition and Induction variable are loop constraints 
not split condition constraints.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40977 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-10 00:33:50 +00:00
Chris Lattner
f2369f2042 when we see a unaligned load from an insufficiently aligned global or 
alloca, increase the alignment of the load, turning it into an aligned load.

This allows us to compile:

#include <xmmintrin.h>
__m128i foo(__m128i x){
 static const unsigned int c_0[4] = { 0, 0, 0, 0 };
	  __m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
  x  = _mm_unpacklo_epi8(x,  v_Zero);
  return x;
}

into:

_foo:
	punpcklbw	_c_0.5944, %xmm0
	ret
	.data
	.lcomm	_c_0.5944,16,4		# c_0.5944

instead of:

_foo:
	movdqu	_c_0.5944, %xmm1
	punpcklbw	%xmm1, %xmm0
	ret
	.data
	.lcomm	_c_0.5944,16,2		# c_0.5944



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40971 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-09 19:05:49 +00:00
Owen Anderson
9528f11481 Make NonLocal and None const in the right way. :-) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40961 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-09 04:42:44 +00:00
Devang Patel
c9d123dca9 Traverse loop blocks' terminators to find split candidates. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40960 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-09 01:39:01 +00:00
Devang Patel
9704fcf505 Add cost analysis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40952 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 22:25:28 +00:00
Devang Patel
787a713bb2 Preserve dom info while processing one iteration loop. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40947 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 21:39:47 +00:00
Owen Anderson
8cad423d94 Change the None and NonLocal markers in memdep to be const. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40946 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 21:39:39 +00:00
Devang Patel
9021c7001e Clear split info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40944 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 21:18:27 +00:00
Devang Patel
71554b8e3c Handle multiple split conditions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40941 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 21:02:17 +00:00
Owen Anderson
838014ee5b Global values also don't undead-ify pointers in our dead alloca's set. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40936 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 19:12:31 +00:00
Owen Anderson
362bb52108 Make handleEndBlock significantly faster with one trivial improvement, 
and one hack to avoid hitting a bad case when the alias analysis is imprecise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40935 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 18:38:28 +00:00
Owen Anderson
df359c264e Small improvement: if a function doesn't access memory, we don't need to scan 
it for potentially undeading pointers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40933 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 17:58:56 +00:00
Owen Anderson
bb3abf41a8 Add some comments, remove a dead argument, and simplify some control flow. 
No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40932 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 17:50:09 +00:00
Owen Anderson
c182f17aed A few more small cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40922 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 06:06:02 +00:00
Owen Anderson
6ca4cb3755 First round of cleanups from Chris' feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40919 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 04:52:29 +00:00
Devang Patel
6a2bfdaab6 Embrace patch review feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40915 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-08 01:51:27 +00:00
Devang Patel
002fe25dd7 Fix new compare instruction's signness. Caught by Chris during review. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40912 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-07 23:17:52 +00:00
Owen Anderson
a37226af81 Don't insert nearly as many redundant phi nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40909 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-07 23:12:31 +00:00
Devang Patel
8431a1cbcc Use eraseFromParent(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40903 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-07 17:45:35 +00:00
David Greene
32fe3de0fe Fix comment typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40898 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-07 16:52:03 +00:00
David Greene
8ff18e9c99 Fix GLIBCXX_DEBUG error triggered by incrementing erased iterator. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40897 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-07 16:44:38 +00:00
Devang Patel
fee76bd9ba Begin loop index split pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40883 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-07 00:25:56 +00:00
Nick Lewycky
f947b3edb5 It's safe to fold not of fcmp. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40870 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-06 20:04:16 +00:00
David Greene
242be6e0ff Make this code more efficient. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40861 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-06 15:09:17 +00:00
Chris Lattner
3589df8013 remove some dead lines 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40859 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-06 06:21:06 +00:00
Reid Spencer
81a7572f1a Silence some warnings from doxygen about @param argument name not matching the 
actual argument name of the documented function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40851 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-05 19:35:22 +00:00
Chris Lattner
a9ff5eb76e at the end of instcombine, explicitly clear WorklistMap. 
This shrinks it down to something small.  On the testcase
from PR1432, this speeds up instcombine from 0.7959s to 0.5000s,
(59%)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40840 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-05 08:47:58 +00:00
Chris Lattner
f12f8def39 rewrite the code used to construct pruned SSA form with the IDF method. 
In the old way, we computed and inserted phi nodes for the whole IDF of 
the definitions of the alloca, then computed which ones were dead and
removed them.

In the new method, we first compute the region where the value is live,
and use that information to only insert phi nodes that are live.  This
eliminates the need to compute liveness later, and stops the algorithm
from inserting a bunch of phis which it then later removes.

This speeds up the testcase in PR1432 from 2.00s to 0.15s (14x) in a
release build and 6.84s->0.50s (14x) in a debug build.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40825 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 22:50:14 +00:00
Chris Lattner
0ec8df3d5f Factor out a whole bunch of code into it's own method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40824 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 21:14:29 +00:00
Chris Lattner
127ed3c929 Use getNumPreds(BB) instead of computing them manually. This is a very small but 
measurable speedup.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40823 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 21:06:15 +00:00
Chris Lattner
1e76af3011 Change the rename pass to be "tail recursive", only adding N-1 successors 
to the worklist, and handling the last one with a 'tail call'.  This speeds
up PR1432 from 2.0578s to 2.0012s (2.8%)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40822 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 20:40:27 +00:00
Chris Lattner
e7b653dabe cache computation of #preds for a BB. This speeds up 
mem2reg from 2.0742->2.0522s on PR1432.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40821 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 20:24:50 +00:00
Chris Lattner
384c7e0436 reserve operand space for phi nodes when we insert them. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40820 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 20:14:34 +00:00
Chris Lattner
6c81213b4c use continue to avoid nesting, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40819 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 20:07:06 +00:00
Chris Lattner
fb312c7e44 Promoting allocas with the 'single store' fastpath is 
faster than with the 'local to a block' fastpath.  This speeds
up PR1432 from 2.1232 to 2.0686s (2.6%)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40818 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 20:03:23 +00:00
Chris Lattner
7a5745b38c When PromoteLocallyUsedAllocas promoted allocas, it didn't remember 
to increment NumLocalPromoted, and didn't actually delete the
dead alloca, leading to an extra iteration of mem2reg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40817 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 20:01:43 +00:00
Chris Lattner
59a2837715 std::map -> DenseMap 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40816 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 19:52:20 +00:00
Nick Lewycky
7956dae870 Clean up comments, fix up some confusing code logic. 
Predsimplify fails llvm-gcc bootstrap.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40815 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 18:45:32 +00:00
Chris Lattner
c69e491575 fix a logic bug where we wouldn't promote single store allocas if the 
stored value was a non-instruction value.  Doh.

This increase the # single store allocas from 8982 to 9026, and
speeds up mem2reg on the testcase in PR1432 from 2.17 to 2.13s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40813 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 02:45:02 +00:00
Chris Lattner
4f63e76cda When we do the single-store optimization, delete both the store 
and the alloca so they don't get reprocessed.

This speeds up PR1432 from 2.20s to 2.17s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40812 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 02:38:38 +00:00
Chris Lattner
d0458e5d4f Three improvements: 
1. Check for revisiting a block before checking domination, which is faster.
  2. If the stored value isn't an instruction, we don't have to check for domination.
  3. If we have a value used in the same block more than once, make sure to remove the
     block from the UsingBlocks vector.  Not doing so forces us to go through the slow
     path for the alloca.

The combination of these improvements increases the number of allocas on the fastpath
from 8935 to 8982 on PR1432.  This speeds it up from 2.90s to 2.20s (31%)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40811 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 02:32:22 +00:00
Chris Lattner
c3f6ea8330 switch from using a std::set to using a SmallPtrSet. This speeds up the 
testcase in PR1432 from 6.33s to 2.90s (2.22x)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40810 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 02:21:22 +00:00
Chris Lattner
b776a335b1 In mem2reg, when handling the single-store case, make sure to remove 
a using block from the list if we handle it.  Not doing this caused us
to not be able to promote (with the fast path) allocas which have uses (whoops).

This increases the # allocas hitting this fastpath from 4042 to 8935 on the
testcase in PR1432, speeding up mem2reg by 2.6x



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40809 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 02:15:24 +00:00
Chandler Carruth
6994040a95 This is the patch to provide clean intrinsic function overloading support in LLVM. It cleans up the intrinsic definitions and generally smooths the process for more complicated intrinsic writing. It will be used by the upcoming atomic intrinsics as well as vector and float intrinsics in the future. 
This also changes the syntax for llvm.bswap, llvm.part.set, llvm.part.select, and llvm.ct* intrinsics. They are automatically upgraded by both the LLVM ASM reader and the bitcode reader. The test cases have been updated, with special tests added to ensure the automatic upgrading is supported.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40807 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 01:51:18 +00:00
Chris Lattner
5dd75b4ca7 split rewriting of single-store allocas into its own 
method.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40806 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 01:47:41 +00:00
Chris Lattner
bbe104002f refactor some code to shrink PromoteMem2Reg::run a bit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40805 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 01:41:18 +00:00
Chris Lattner
483ce14bf4 add a typedef, no other change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40804 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 01:19:38 +00:00
Chris Lattner
63cdcaa3d6 avoid an unneeded vector copy. This speeds up mem2reg on the testcase 
in PR1432 by 6%


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40803 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 01:07:49 +00:00
Chris Lattner
ac4aa4be9b make RenamePassWorkList a local var instead of an ivar. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40802 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-04 01:04:40 +00:00
Owen Anderson
ab8702787d Fix a subtle miscompilation. This allows 197.parser to be compiled correctly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40791 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-03 19:59:35 +00:00
Owen Anderson
4b55c3b0f1 Fix a subtle iterator invalidation bug in a recursive algorithm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40776 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-03 11:03:26 +00:00
Chris Lattner
b0e71edb6b Fix an accidental commit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40758 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 21:33:36 +00:00
Owen Anderson
9fed589912 Fix 80 col. violations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40751 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 18:20:52 +00:00
Owen Anderson
830db6a00e Fix 80 col. violations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40750 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 18:16:06 +00:00
Owen Anderson
666f6fe0ce Fix 80 col. violations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40749 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 18:11:11 +00:00
Owen Anderson
1c2763d3fe Fix a bug that was causing several miscompilations on SPEC. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40746 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 17:56:05 +00:00
Chris Lattner
5543a856ff Replacing a cast with another one does not reduce the number of 
casts in the input.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40741 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 17:23:38 +00:00
Chris Lattner
b014678eb3 Disable an xform that causes an infinite loop. This fixes PR1594 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40739 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 16:56:32 +00:00
Chris Lattner
684b22df79 wrap some long lines. Major offenders that are left include 
gvn, gvnpre, dse, and predsimplify.  To see these, use:

  make check-line-length



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40738 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 16:53:43 +00:00
Devang Patel
1ff61385c8 Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589, again



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40737 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 15:25:57 +00:00
Chris Lattner
951626b437 Enhance instcombine to be more aggressive about folding casts of 
operations of casts.  This implements InstCombine/zext-fold.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40726 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 06:11:14 +00:00
Chris Lattner
9dd7a5178f Fix PR1575 and test/Transforms/CondProp/2007-08-01-InvalidRead.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40720 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-02 04:47:05 +00:00
Devang Patel
2f2e519083 Undo previous check-in. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40698 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 23:24:50 +00:00
Devang Patel
28ae151c48 Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40695 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 22:23:50 +00:00
Owen Anderson
9066020993 Make non-local memdep not be recursive, and fix a bug on 403.gcc that this exposed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40692 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 22:01:54 +00:00
Dan Gohman
c2bbfc18e9 More explicit keywords. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40673 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 15:32:29 +00:00
Owen Anderson
f6a05f949f Rename FastDSE to just DSE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40668 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 06:36:51 +00:00
Owen Anderson
a56c34f90b Move FastDSE in to DeadStoreElimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40667 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 06:30:51 +00:00
Owen Anderson
e739bae8da Remove old DSE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40666 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 06:30:10 +00:00
David Greene
52eec54820 New CallInst interface to address GLIBCXX_DEBUG errors caused by 
indexing an empty std::vector.

Updates to all clients.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40660 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-01 03:43:44 +00:00
Owen Anderson
bf7d0bc4e5 Don't let the memory allocator outsmart GVN. ;-) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40655 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-31 23:27:13 +00:00
Owen Anderson
b95f9d565f Fix a failure I accidentally caused in my last commit by mishandling the 
removal of redundant phis.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40650 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-31 20:18:28 +00:00
Lauro Ramos Venancio
c7d1114ade Fix a bug in GetKnownAlignment of packed structs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40649 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-31 20:13:21 +00:00
Owen Anderson
054ab94bff Fix a misoptimization in aha. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40642 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-31 17:43:14 +00:00
Dan Gohman
a9cfed77b6 Use SCEVExpander::InsertCastOfTo instead of calling new IntToPtrInst 
directly, because the insert point used by the SCEVExpander may vary
from what LSR originally computes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40641 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-31 17:22:27 +00:00
Devang Patel
8d246f09cb Add note. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40638 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-31 16:52:25 +00:00
Devang Patel
15c260adff Loop unswitch preserves dom info. 
Use simple analysis interface to preserve analysis info maintained by other loop passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40627 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-31 08:03:26 +00:00
Devang Patel
91d22c8b1e Implement Simple Analysis interfaces - cloneBasicBlockAnalysis and deleteAnalysisValue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40626 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-31 08:01:41 +00:00
Devang Patel
6f62af6e64 If loop can be unswitched again, then do it yourself. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40609 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 23:07:10 +00:00
Owen Anderson
891eecb040 Avoid potential iterator invalidation problems. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40607 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 21:26:39 +00:00
Devang Patel
df5cf2074c Remove dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40606 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 21:10:44 +00:00
Devang Patel
81a129c0fb LCSSA preserves dom info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40604 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 20:23:45 +00:00
Devang Patel
d9a6dcba9f Loop Rotation pass preserves dominator tree and frontier. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40603 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 20:22:53 +00:00
Devang Patel
96b651c627 LICM preserves scalar evolution and dom frontier. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40602 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 20:19:59 +00:00
Reid Spencer
ed3fa8552a Fix a typo/thinko. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40599 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 19:53:57 +00:00
Owen Anderson
45c8388e2a Use more caching when computing non-local dependence. This makes bzip2 not 
use up the entire 32-bit address space.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40596 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 17:29:24 +00:00
Owen Anderson
4f9ba7c40c Fix a bug caused by indiscriminantly asking for the dominators of a predecessor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40595 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-30 16:57:08 +00:00
Devang Patel
29381fb7cd Use SmallPtrSet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40560 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-27 18:34:27 +00:00
Chuck Rose III
936baaa5ae VStudio compiler errors and placing Function*->ExFunc map under ManagedStatic control. 
This commit fixes two things.  One is a pair of VStudio compiler errors stemming from variables
which defined within the for loop statement and also within the body of the for loop.  I fixed these 
by renaming one of the two variables.  Additionally, I've made the Function*->ExFunc map in 
ExternalFunctions.cpp a ManagedStatic object, so that cleanup will be done on llvm_shutdown.  In repeated
uses of the interpreter, where the same Function* address may get used for completely differnet functions,
this was causing a crash.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40558 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-27 18:26:35 +00:00
Devang Patel
70b36d96b3 Fix thinko. Update return status appropriately. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40546 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-26 20:21:42 +00:00
Owen Anderson
45537917ee Fix a couple more bugs in the phi construction by pulling in code that does 
almost the same things from LCSSA.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40540 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-26 18:26:51 +00:00
Dan Gohman
37f3ee17d2 Move the GET_SIDE_EFFECT_INFO logic from isInstructionTriviallyDead 
to Instruction::mayWriteToMemory, fixing a FIXME, and helping
various places that call mayWriteToMemory directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40533 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-26 16:06:08 +00:00
Dan Gohman
c2dfd066c0 Remove a bogus return statement, what appears to have been a pasto 
from Relation::contradicts in Relation::incorporate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40531 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-26 15:29:35 +00:00
Owen Anderson
febc7e3613 Fix what is _hopefully_ the last corner case for loops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40503 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-25 23:54:42 +00:00
Owen Anderson
9f435740b1 My last commit was not correct for nested loops. Fix it, and add a testcase for it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40498 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-25 22:19:40 +00:00
Owen Anderson
0d16988690 Fix an infinite loop on 300.twolf. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40497 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-25 22:03:06 +00:00
Owen Anderson
2e3d6b4a27 Fix a bug that was causing GVN to crash on 252.eon. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40494 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-25 21:13:41 +00:00
Owen Anderson
0cd320362e Add basic support for performing whole-function RLE. 
Note: This has not yet been thoroughly tested.  Use at your own risk.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40489 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-25 19:57:03 +00:00
Devang Patel
6899b31422 Add BasicInliner interface. 
This interface allows clients to inline bunch of functions with module
level call graph information.:wq



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40486 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-25 18:00:25 +00:00
Owen Anderson
1ad2cb7555 Add a GVN pass, using the value numbering code I developed for GVNPRE and the 
load elimination code from RedundantLoadElimination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40469 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-24 17:55:58 +00:00
Owen Anderson
a7f98e2919 Rename a lot of things to change FastDLE to RedundantLoadElimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40457 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-24 00:17:04 +00:00
Owen Anderson
e2a1624da3 Rename FastDLE as RedundantLoadElimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40456 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-24 00:08:38 +00:00
Owen Anderson
6b8894bb67 Don't delete volatile loads. Doing so is not safe. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40448 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-23 22:05:54 +00:00
Owen Anderson
ffe40aa97d Add FastDLE, the load-elimination counterpart of FastDSE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40445 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-23 21:48:08 +00:00
Owen Anderson
d989711844 Fix file header. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40440 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-23 18:30:37 +00:00
Chris Lattner
410ce1c49a completely remove a transformation that is unsafe in the face of 
undefs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40439 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-23 17:10:17 +00:00
Devang Patel
00ae1a2f02 Apply temporary work around to fix llvm mis-compilation 
reported in PR 1556.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40133 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-21 00:34:29 +00:00
Chris Lattner
3ccc6bc61c this xform is already done by the constant folder. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40124 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-20 22:06:41 +00:00
Dan Gohman
9941f7426d Optimize alignment of loads and stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40102 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-20 16:34:21 +00:00
Duncan Sands
e2abf12436 Place SCCPSolver also in the anonymous namespace. This 
pacifies g++-4.2.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40089 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-20 08:56:21 +00:00
Owen Anderson
c9399be5e5 Fix a bug where we were marking GEP expressions with the wrong opcode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40085 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-20 08:19:20 +00:00
Owen Anderson
b83e56f6b6 Make val_replace fail early, which reduces the time to optimize 403.gcc to 14.8s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40064 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-19 19:57:13 +00:00
Devang Patel
58e0ef1e90 Verify loop info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40062 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-19 18:02:32 +00:00
Owen Anderson
19bc4a8acd Use SmallVector and DenseMap in even more places. 
With this, the time to optimize 403.gcc is down to 15.1s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40042 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-19 06:37:56 +00:00
Owen Anderson
fb66541e63 Change ValueTable to use a DenseMap for mapping expressions to value numbers. 
This results in a slight speedup for 403.gcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40040 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-19 06:13:15 +00:00
Owen Anderson
b97819852a Move some sets and maps to SmallPtrSet and DenseMap respectively. This 
reduces the time to optimize 403.gcc from 17.6s to 16.4s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40036 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-19 03:32:44 +00:00
Devang Patel
a8a8a36629 After a basic block is split into two parts, 
second part dominates all the blocks dominated
by original basic block. And first part dominates
second part.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40035 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-19 02:29:24 +00:00
Devang Patel
72ea8d9060 Now this temp. fix is not required. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40034 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-19 02:22:21 +00:00
Devang Patel
24857a3fac Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40025 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-18 23:50:19 +00:00
Devang Patel
31ad75329e Fix dominator info update to accommodate CFG changes. 
This fixes PR1559.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40024 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-18 23:48:20 +00:00
Owen Anderson
ce17b1c1f8 Take advantage of undefined behavior if the source program tries to GEP 
beyond the end of an alloca to make FastDSE faster and more aggressive.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39945 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-16 23:34:39 +00:00
Owen Anderson
faac518ce0 Add support for walking up memory def chains, which enables finding many more 
dead stores on 400.perlbench.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39929 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-16 21:52:50 +00:00
Reid Spencer
bde6869ef4 Return Undef if the block has no dominator. This was required to allow 
llvm-gcc build to succeed. Without this change it fails in libstdc++
compilation. This causes no regressions in dejagnu tests. However, 
someone who knows this code better might want to review it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39924 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-16 21:03:44 +00:00
Dan Gohman
07a96765da Fix comments about vectors to use the current wording. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39921 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-16 14:29:03 +00:00
Chris Lattner
cb7122bb7d Repair a regression in Transforms/InstCombine/mul.ll that Reid noticed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39896 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-16 04:15:34 +00:00
Nick Lewycky
5380e941ef Start adding and cleaning up comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39894 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-16 02:58:37 +00:00
Chris Lattner
4241e4da85 Implement shift-simplify.ll:test[45]. 
First teach instcombine that sign bit checks only demand the 
sign bit, this allows simplify demanded bits to hack on 
expressions better.

Second, teach instcombine that ashr is useless if only the
sign bit is demanded.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39880 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-15 20:54:51 +00:00
Chris Lattner
a0141b90a3 Implement shift-simplify.ll:test3, turning: 
(X << 31) <s 0  --> (X&1) != 0

This happens dozens of times in the CFE.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39879 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-15 20:42:37 +00:00
Nick Lewycky
a73d11efd4 Use maximal intersection algorithm exclusively. Fixes miscompile bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39852 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-14 04:28:04 +00:00
Devang Patel
b4559a2179 Make LCSSA a loop pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39844 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-13 23:57:11 +00:00
Owen Anderson
a08971559d Handle GEPs with all-zero indices in the same way we handle pointer-pointer bitcasts. Also, fix a potentia infinite loop. 
This brings FastDSE to parity with old DSE on 175.vpr.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39839 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-13 22:50:48 +00:00
Devang Patel
fba36b8cba Disable claims to preserve analysis until open issues are resolved. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39834 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-13 21:53:42 +00:00
Owen Anderson
3e8d001799 Be more aggressive in removing dead stores, and in removing instructions trivially dead after DSE. 
This drastically improves the effect of FastDSE on kimwitu++.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39819 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-13 18:26:26 +00:00
Owen Anderson
43b2676cc2 Reimplement removing stores to allocas at the end of a function. This should be safe now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39790 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 21:41:30 +00:00
Owen Anderson
dd61c2b25c Make the condition-checking for free with non-trivial dependencies more correct. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39789 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 18:08:51 +00:00
Owen Anderson
1b4542b6df Remove the end-block handling code. It was unsafe, and making it safe would have resulted in falling back to the slow DSE case. I need to think some more about the right way to handle this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39788 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 17:52:20 +00:00
Gabor Greif
3b0a7ea66e checked in as obvious, 
thanks Benoit Boissinot!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39774 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 13:31:38 +00:00
Owen Anderson
1cb960a4bb Let MemoryDependenceAnalysis take care of updating AliasAnalysis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39769 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-12 00:06:21 +00:00
Devang Patel
990e866deb Preserve analysis info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39767 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 23:47:28 +00:00
Owen Anderson
a96c1f665a Handle the case where an entire structure is freed, and its dependency is a store to a field within 
that structure.

Also, refactor the runOnBasicBlock() function, splitting some of the special cases into separate functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39762 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 23:19:17 +00:00
Owen Anderson
6f46d65104 Add support for eliminate stores to stack-allocated memory locations at the end 
of a function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39754 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 21:06:56 +00:00
Owen Anderson
2655adb3b2 Handle eliminating stores that occur right before a free. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39753 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 20:38:34 +00:00
Owen Anderson
bfbfb3c464 Clean up a few things based on Chris' feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39747 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 19:03:09 +00:00
Tanya Lattner
08d14d2469 Adding ability to demote phi to stack. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39744 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 18:41:34 +00:00
Owen Anderson
b77c457cc8 Add FastDSE, a new algorithm for doing dead store elimination. This algorithm is not as accurate 
as the current DSE, but it only a linear scan over each block, rather than quadratic.  Eventually
(once it has been improved somewhat), this will replace the current DSE.

NOTE: This has not yet been extensively tested.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38517 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-11 00:46:18 +00:00
Owen Anderson
16a72bb47d Make the pass registration static. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38508 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 20:20:19 +00:00
Anton Korobeynikov
a289511090 During module cloning copy aliases too. This fixes PR1544 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38505 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 19:07:35 +00:00
Nick Lewycky
6e8eb7f075 Update the ValueRanges interface to use value numbers instead of Value*s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38483 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 03:28:21 +00:00
Owen Anderson
81c2a6ecbb Move some key maps from std::map to DenseMap. This improves the time to optimize Anton's testcase from 17.5s 
to 15.7s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38480 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 00:27:22 +00:00
Owen Anderson
a05a81b10a Use a cheaper test, delaying calling find_leader() until we know that it's necessary. This improves 
the time to optimize Anton's testcase from 21.1s to 17.6s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38479 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 00:09:25 +00:00
Owen Anderson
5fd507d431 Add an assertion if find_leader fails. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38477 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 23:57:18 +00:00
Owen Anderson
dfa2435784 Take advantage of the new fast SmallPtrSet assignment operator when propagating AVAIL_OUT sets. 
This reduces the time to optimize Anton's testcase from 31.2s to 21.s!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38475 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 22:29:50 +00:00
Devang Patel
ff366850aa Expose struct size threhold to allow users to tweak their own setting. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38472 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 21:19:23 +00:00
Owen Anderson
ab3fd054ea Fix a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38459 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 16:43:55 +00:00
Owen Anderson
b9eeb1acbc Improve a hotspot that was making build_sets() slower by calling lookup() too 
often.  This improves Anton's testcase from 36s to 32s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38441 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 07:56:55 +00:00
Owen Anderson
0616dffd64 Start using a set representation that remembers the set of value numbers represented 
in the set.  For the moment, this results in a slight performance decrease, but
it lays the groundwork for future improvements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38439 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-09 06:50:06 +00:00
Owen Anderson
36a07daabd Fix an error where ANTIC_OUT was ending up with more than one expression of 
the same value number.  This fixes an infinite loop on 444.namd.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37967 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-07 20:13:57 +00:00
Nick Lewycky
8f5149e002 Back out Devang's fix for PR1320 because it causes PR1542. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37966 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-07 16:23:34 +00:00
Devang Patel
05c1dc6493 These rountines are now available as part of basic block utilities. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37955 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 22:03:47 +00:00
Devang Patel
7be06f9158 Request DominanceFrontiner in advance. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37954 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 21:43:22 +00:00
Devang Patel
658f625d16 Preserve various analysis info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37953 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 21:40:13 +00:00
Devang Patel
8019893c3f Add SplitEdge and SplitBlock utility routines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37952 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 21:39:20 +00:00
Owen Anderson
ec5614b522 Be more aggressive in the heuristic. This mostly exposes more opportunities 
for the GVN part of GVNPRE to apply.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37951 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 20:29:43 +00:00
Owen Anderson
2c194e6bd1 Achieve what the incorrect test was trying to do by simply requiring that all 
critical edges be split before we begin.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37949 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 18:12:36 +00:00
Owen Anderson
6a6152ca2d Remove an incorrect check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37948 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 16:52:47 +00:00
Zhou Sheng
33b0b8d242 Correct a typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37936 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-06 06:01:16 +00:00
Owen Anderson
2a5c9d8aac Fix a bunch of issues found in a testcase from 400.perlbench. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37929 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-05 23:11:26 +00:00
Nick Lewycky
29a05b6a71 Break "variable canonicalization" out of InequalityGraph and into its own class 
"ValueNumbering".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37881 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-05 03:15:00 +00:00
Owen Anderson
ec3ed5f8e4 Fix another bug, this time in PREing select instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37878 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-04 22:33:23 +00:00
Owen Anderson
df30b63663 Fix a typo that was killing GVNPRE of select instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37871 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-04 18:26:18 +00:00
Owen Anderson
9eee94c5f7 Fix an error in phi translation of GEPs that was causing failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37868 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-04 04:51:16 +00:00
Owen Anderson
5653322e72 Add support for performing GVNPRE on GEP instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37862 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-03 23:51:19 +00:00
Owen Anderson
eb21686ea9 Add functionality to value number GEP instructions. This also provides the infrastructure that will 
be used for function calls.  NOTE: This does not yet do any transformation of GEPs or function calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37860 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-03 22:50:56 +00:00
Owen Anderson
3d6fac3993 Make the unary operator case a bit faster, since casts are the only kind of unary operation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37857 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-03 19:01:42 +00:00
Owen Anderson
216394f9b3 Add support for performing GVNPRE on cast instructions, and add a testcase for this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37856 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-03 18:37:08 +00:00
Devang Patel
f34a43acc0 Preserve DominanceFrontier. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37820 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 23:11:49 +00:00
David Greene
c08fa28897 Fix reference to iterator invalidated by an erase operation. Uncovered 
by _GLIBCXX_DEBUG.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37796 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 02:53:16 +00:00
Devang Patel
6c631988c7 Do not filter loop if candidate branch is in loop header. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37792 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 01:39:53 +00:00
Owen Anderson
ca6c31cc41 Add support for value numbering (but not actually optimizing) cast instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37789 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 00:51:03 +00:00
Owen Anderson
40dc00eb82 Add a type field to expressions in preparation for performing GVNPRE on casts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37788 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-29 00:40:05 +00:00
Owen Anderson
890e1a0401 Add support for performing GVNPRE on select instructions. This fixes test/Transforms/GVNPRE/select.ll. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37783 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 23:51:21 +00:00
Devang Patel
eb62eca503 - Undo previous check and allow loop switch for condtion that is not inside 
loop.
- Avoid loop unswich for loop header branch.
- While cloning dominators fix typo and handle self dominating blocks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37772 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 02:05:46 +00:00
Devang Patel
cce624a7a9 Update LoopUnswitch pass to preserve DomiantorTree. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37771 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 00:49:00 +00:00
Devang Patel
558f1b8439 If a condition is not inside a loop then the condition is suitable 
to loop unswitch candidate for the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37770 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 00:44:10 +00:00
Owen Anderson
a20f35d2e7 Make many sets a much more reasonable size. This decreases the time to optimize 
Anton's testcase from 35.5s to 34.7s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37769 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-28 00:34:34 +00:00
Owen Anderson
68cb52e468 Use cached information that has already been computed to make clean() simpler and faster. This is a small speedup on most cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37761 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-27 17:38:29 +00:00
Owen Anderson
7b317d2f59 Fold a lot of code into two cases: binary instructions and ternary instructions. 
This saves many lines of code duplication.  No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37759 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-27 17:03:03 +00:00
Zhou Sheng
0d7d3656f3 Fix a bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37751 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-27 09:50:26 +00:00
Owen Anderson
62cf8babdb Add support for performing GVNPRE on the three vector-specific operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37745 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-27 04:10:46 +00:00
Owen Anderson
6032a5ba64 1. Correct some comments and clean up some dead code. 
2. When calculating ANTIC_IN, only iterate the changed blocks.  For most average
inputs this is a small speedup, but for cases with unusual CFGs, this can be a significant win.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37742 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-26 23:29:41 +00:00
Chris Lattner
ba6801e6e7 fix Transforms/Inline/2007-06-25-WeakInline.ll by not inlining functions 
with weak linkage.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37723 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-25 21:50:09 +00:00
Owen Anderson
9030d384c4 Use the built-in postorder iterators rather than computing a postorder walk by hand. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37721 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-25 18:25:31 +00:00
Owen Anderson
f62c44a38d 1) Fix an issue with non-deterministic iteration order in phi_translate 
2) Remove some maximal-set computing code that is no longer used.
3) Use a post-order CFG traversal to compute ANTIC_IN instead of a postdom traversal.
This causes the ANTIC_IN calculation to converge much faster.  Thanks to Daniel Berlin for suggesting this.

With this patch, the time to optimize 403.gcc decreased from 17.5s to 7.5s, and Anton's huge
testcase decreased from 62 minutes to 38 seconds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37714 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-25 05:41:12 +00:00
Nick Lewycky
4390feb7ae Fix value ranges. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37713 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-24 20:14:22 +00:00
Owen Anderson
79a6370133 Fix a silly mistake that was causing failures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37712 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-24 08:42:24 +00:00
Nick Lewycky
dea252689d Remove tabs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37710 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-24 04:40:16 +00:00
Nick Lewycky
984504b912 Remove use of ETForest. Also cleaned up issues around unreachable basic 
blocks, and optimizing within one basic block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37709 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-24 04:36:20 +00:00
Owen Anderson
647580483c Rework topo_sort so eliminate some behavior that scaled terribly. This reduces the time to optimize 403.gcc from 18.2s to 17.5s, 
and has an even larger effect on larger testcases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37708 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 21:31:16 +00:00
Owen Anderson
2106f61f23 Perform fewer set insertions while calculating ANTIC_IN. This reduces the amount of time to optimize 403.gcc from 21.9s to 18.2s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37707 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 18:27:04 +00:00
Owen Anderson
b3b37345de Remove some code that I was using for collecting performance information that should not have been committed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37706 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 17:04:40 +00:00
Owen Anderson
124084604d Avoid excessive calls to find_leader when calculating AVAIL_OUT. This reduces the time to optimize 403.gcc from 23.5s to 21.9s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37702 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 03:14:03 +00:00
Owen Anderson
e8138ffeaf Reserve space in vectors before topologically sorting into them. This improves the time to optimize 403.gcc from 28s to 23.5s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37699 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 00:43:22 +00:00
Owen Anderson
82575d8ab1 Make a bunch of optimizations for compile time to GVNPRE, including smarter set unions, deferring blocks rather than computing maximal sets, and smarter use of sets. With these enhancements, the time to optimize 273.perlbmk goes from 5.3s to 2.7s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37698 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-22 00:20:30 +00:00
Chris Lattner
1dbfd48fa2 Significantly improve the documentation of the instcombine divide/compare 
transformation.  Also, keep track of which end of the integer interval overflows
occur on.  This fixes Transforms/InstCombine/2007-06-21-DivCompareMiscomp.ll
and rdar://5278853, a miscompilation of perl.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37692 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-21 18:11:19 +00:00
Owen Anderson
66fd906074 Change lots of sets from std::set to SmallPtrSet. This reduces the time required to optimize 253.perlbmk from 10.9s to 5.3s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37690 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-21 17:57:53 +00:00
Devang Patel
0e7f728ad1 Move code to update dominator information after basic block is split 
from LoopSimplify.cpp to Dominator.cpp


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37689 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-21 17:23:45 +00:00
Owen Anderson
58e087b6e3 Eliminate a redundant check. This speeds up optimization of 253.perlbmk from 13.5 seconds to 10.9 seconds. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37683 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-21 01:59:05 +00:00
Owen Anderson
9cb56014ce Comment-ize the functions in GVNPRE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37681 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-21 00:19:05 +00:00
Chris Lattner
562ef78df2 refactor a bunch of code out of visitICmpInstWithInstAndIntCst into its own 
routine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37679 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-20 23:46:26 +00:00
Owen Anderson
3eaca716bf Split runOnFunction into many smaller functions. This make it easier to get accurate performance analysis of GVNPRE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37678 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-20 22:10:02 +00:00
Owen Anderson
0304b2bc2b Make GVNPRE accurate report whether it modified the function or not. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37673 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-20 18:30:20 +00:00
Owen Anderson
5dbea73e35 Get rid of an unneeded helper function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37670 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-20 00:43:33 +00:00
Owen Anderson
4f703ec0a1 Use a DenseMap instead of an std::map for the value numbering. This reduces the time to optimize lencod on a PPC Debug build from ~300s to ~140s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37668 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 23:23:54 +00:00
Owen Anderson
52471b102c Make dependsOnInvoke much more specific in what it tests, which in turn make it much faster to run. This reduces the time to optimize lencondwith a debug build on PPC from ~450s to ~300s. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37667 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 23:07:16 +00:00
Tanya Lattner
c91c56cf43 Moved Inliner.h to include/llvm/Transforms/IPO/InlinerPass.h 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37666 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 22:31:52 +00:00
Tanya Lattner
6f7426ec2e Inliner pass header file was moved. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37665 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 22:29:50 +00:00
Dan Gohman
5cec4db6ae Rename ScalarEvolution::deleteInstructionFromRecords to 
deleteValueFromRecords and loosen the types to all it to accept
Value* instead of just Instruction*, since this is what
ScalarEvolution uses internally anyway. This allows more flexibility
for future uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37657 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 14:28:31 +00:00
Owen Anderson
d0954105f0 Handle constants in phi nodes properly. This fixes test/Transforms/GVNPRE/2007-06-18-ConstantInPhi.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37655 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 07:35:36 +00:00
Chris Lattner
2384d7b179 silence a bogus warning Duraid ran into. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37649 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 05:43:49 +00:00
Owen Anderson
20cb51fda4 Be careful to erase values from all of the appropriate sets when they're not needed anymore. This fixes a few more memory-related issues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37647 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 05:37:32 +00:00
Owen Anderson
6cae7409b1 Remember to clear the maximal sets between functions. 
Thanks to Nicholas for valgrinding this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37646 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 04:32:55 +00:00
Owen Anderson
086f5f350b Refactor GVNPRE to use a much smart method of uniquing value sets, and centralize a lot of the value numbering information. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37645 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-19 03:31:41 +00:00
Owen Anderson
bbf1197be1 Cache the results of dependsOnInvoke() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37622 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-18 04:42:29 +00:00
Owen Anderson
a8daa7176b Fix indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37621 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-18 04:31:21 +00:00
Owen Anderson
60e174495a Don't perform an expensive check if it's not necessary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37620 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-18 04:30:44 +00:00
Owen Anderson
32bc789b6c Fix test/Transforms/GVNPRE/2007-06-15-InvokeInst.ll by ignoring all instructions that depend on invokes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37610 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-16 00:26:54 +00:00
Dan Gohman
e19dd87598 Use SCEVConstant::get instead of SCEVUnknown::get to create an 
integer constant SCEV.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37596 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-15 18:00:55 +00:00
Owen Anderson
383bcb2e78 Fix test/Transforms/GVNPRE/2007-06-15-Looping.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37595 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-15 17:55:15 +00:00
Dan Gohman
d19534add9 Add a SCEV class and supporting code for sign-extend expressions. 
This created an ambiguity for expandInTy to decide when to use
sign-extension or zero-extension, but it turns out that most of its callers
don't actually need a type conversion, now that LLVM types don't have
explicit signedness. Drop expandInTy in favor of plain expand, and change
the few places that actually need a type conversion to do it themselves.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37591 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-15 14:38:12 +00:00
Chris Lattner
7cbe2ebb21 Generalize many transforms to work on ~ of vectors in addition to ~ of 
integer ops.  This implements Transforms/InstCombine/and-or-not.ll
test3/test4, and finishes off PR1510


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37589 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-15 06:23:19 +00:00
Chris Lattner
003b6200df Implement two xforms: 
1. ~(~X | Y) === (X & ~Y)
2. (A|B) & ~(A&B) -> A^B

This allows us to transform  ~(~(a|b) | (a&b)) -> a^b.

This implements PR1510 for scalar values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37584 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-15 05:58:24 +00:00
Chris Lattner
041a6c9048 delete some obviously dead vector operations, which deletes a few thousand 
operations from Duraids example.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37582 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-15 05:26:55 +00:00
Owen Anderson
71fcebcf8a Fix test/Transforms/GVNPRE/2007-06-12-PhiTranslate.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37564 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-12 22:43:57 +00:00
Owen Anderson
239e71201e Refactor some code, and fix test/Transforms/GVNPRE/2007-06-12-NoExit.ll by being more careful when using 
post-dominator information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37556 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-12 16:57:50 +00:00
Dale Johannesen
ce0b23721e Sink CmpInst's to their uses to reduce register pressure. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37554 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-12 16:50:17 +00:00
Owen Anderson
65d2862a60 Fix a few more bugs, including an instance of walking in reverse topological rather than topological order. This 
fixes a testcase extracted from llvm-test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37550 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-12 00:50:47 +00:00
Devang Patel
fe7d4e50b8 Add and use DominatorTreeBase::findNearestCommonDominator(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37545 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-11 23:31:22 +00:00
Devang Patel
f60e5a2cd9 Simplify. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37542 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-11 21:45:31 +00:00
Devang Patel
b28aaadfff simplify 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37541 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-11 21:25:31 +00:00
Devang Patel
e3f653606d Simplify. Dominator Tree is required so always available. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37540 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-11 21:18:00 +00:00
Owen Anderson
0e71466405 Handle functions with multiple exit blocks properly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37539 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-11 16:25:17 +00:00
Owen Anderson
139fe848a2 Perform PRE of comparison operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37536 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-09 18:35:31 +00:00
Owen Anderson
b8b873cb7d Collect statistics from GVN-PRE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37530 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 22:02:36 +00:00
Owen Anderson
a7f916cf89 Fix typo in a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37526 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 20:57:08 +00:00
Owen Anderson
8338ff5ff1 Fix a bug that was causing the elimination phase not to replace values when it should be. 
With this patch, GVN-PRE now correctly optimizes the example from the thesis.

Many thanks to Daniel Berlin for helping me find errors in this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37525 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 20:44:02 +00:00
Owen Anderson
900997ba3b Small bugfix, and const-ify some methods (Thanks, Bill). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37513 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 01:52:45 +00:00
Devang Patel
dba2413b2e Update LoopSimplify to require and preserve DominatorTree only. 
Now LoopSimplify does not require nor preserve ETForest.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37512 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 01:50:32 +00:00
Owen Anderson
397d405731 Add partial redundancy elimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37510 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 01:03:01 +00:00
Devang Patel
f86a73cbef Do not preserve ETForest. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37506 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-08 00:02:08 +00:00
Devang Patel
468502e41a Do not require ETForest. Now it is unused by LICM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37502 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 22:21:15 +00:00
Devang Patel
4b90e3a276 Do not use ETForest as well as DomiantorTree. DominatorTree is sufficient. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37501 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 22:17:16 +00:00
Devang Patel
326821ef12 Use DominatorTree instead of ETForest. 
This allows faster immediate domiantor walk.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37500 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 21:57:03 +00:00
Devang Patel
b7d9dfc7ba Use DominatorTree instead of ETForest. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37499 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 21:42:15 +00:00
Devang Patel
fa51f9ae12 Use DominatorTree instead of ETForest. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37498 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 21:35:27 +00:00
Devang Patel
a97e040e05 Use DominatorTree instead of ETForest. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37495 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 18:45:06 +00:00
Devang Patel
387b8cbc2d Use DominatorTree instead of ETForest. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37494 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 18:40:55 +00:00
Devang Patel
9a51157db5 Maintain ETNode as part of DomTreeNode. 
This adds redundancy for now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37492 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 17:47:21 +00:00
Tanya Lattner
b62fa8ab6b Formating fixes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37491 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-07 17:12:16 +00:00
Tanya Lattner
682f683669 Instruct the inliner to obey the noinline attribute. Add test case. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37481 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 21:59:26 +00:00
Chris Lattner
4e2288b9de simplify this code and fix PR1493, now that llvm-gcc3 is dead. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37478 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 20:51:41 +00:00
Lauro Ramos Venancio
d0499af703 Fix PR1499. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37472 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 17:08:48 +00:00
Nick Lewycky
5adcefb04d Inform ScalarEvolutions that we're deleting Values. 
This is the obviously correct part of the fix for PR1487.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37457 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 03:51:56 +00:00
Owen Anderson
12112af5e8 Add simple full redundancy elimination. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37455 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 01:27:49 +00:00
Chris Lattner
b47f6124f4 Fix PR1495 and CodeGen/X86/2007-06-05-LSR-Dominator.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37454 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 01:23:55 +00:00
Devang Patel
743f7e8839 Avoid non-trivial loop unswitching while optimizing for size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37446 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-06 00:21:03 +00:00
Owen Anderson
1d4eb6ab0d Fix a misunderstanding of the algorithm. Really, we should be tracking values 
and expression separately.  We can get around this, however, by only keeping
opaque values in TMP_GEN.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37443 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-05 23:46:12 +00:00
Owen Anderson
8f862c80bc Don't leak memory. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37442 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-05 22:11:49 +00:00
Owen Anderson
359208032b Fix a small bug, some 80 cols violations, and add some more debugging output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37436 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-05 17:31:23 +00:00
Dan Gohman
d8af90c1da Allow insertelement, extractelement, and shufflevector to be hoisted/sunk 
by LICM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37435 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-05 16:05:55 +00:00
Bill Wendling
851879c4cf Patches by Chuck Rose to unbreak V Studio builds. 
Thanks Chuck!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37428 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 23:52:59 +00:00
Devang Patel
170f2b9bef s/ETNode::getChildren/ETNode::getETNodeChildren/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37426 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 23:45:02 +00:00
Owen Anderson
dbc705b73f Don't use std::set_difference when the two sets are sorted differently. Compute 
the difference manually instead.

This allows GVNPRE to produce correct analysis for the example in the GVNPRE
paper.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37425 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 23:34:56 +00:00
Owen Anderson
082fe7185e Fix a bunch of small bugs, and improve the debugging output significantly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37424 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 23:28:33 +00:00
Chris Lattner
f0a9aaba4c When rebuilding constant structs, make sure to honor the isPacked bit. 
This fixes PR1491 and GlobalOpt/2007-06-04-PackedStruct.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37423 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 22:23:42 +00:00
Owen Anderson
5ea069fdda Make phi_translate correct. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37418 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 18:05:26 +00:00
Devang Patel
83beaee227 s/DominatorTree::createNewNode/DominatorTree::addNewBlock/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37415 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 16:43:25 +00:00
Devang Patel
26a6908768 Add basic block level interface to change immediate dominator 
and create new node.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37414 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 16:22:33 +00:00
Devang Patel
26042420d6 s/llvm::DominatorTreeBase::DomTreeNode/llvm::DomTreeNode/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37407 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-04 00:32:22 +00:00
Owen Anderson
0fa6b37c6f Don't use the custom comparator where it's not necessary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37406 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-03 22:02:14 +00:00
Devang Patel
bec7647f98 s/DominatorTreeBase::Node/DominatorTreeBase:DomTreeNode/g 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37403 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-03 06:26:14 +00:00
Owen Anderson
10ac137d0b Remove an unused method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37402 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-03 05:58:25 +00:00
Owen Anderson
a724ac1a73 There's no need to have an Expression class... Value works just as well! This simplifies a lot of code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37401 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-03 05:55:58 +00:00
Devang Patel
e7ae1a9dee Insert new instructions in AliasSet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37390 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-01 22:15:31 +00:00
Owen Anderson
aa7d3351f0 clean() needs to process things in topological order. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37389 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-01 22:00:37 +00:00
Owen Anderson
8e21fb7df8 Fix Expression comparison, which in turn fixes a value numbering error. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37386 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-01 17:34:47 +00:00
Owen Anderson
243f348c2a Add a topological sort function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37376 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-31 22:44:11 +00:00
Owen Anderson
8214d50338 Attempt to fix up phi_translate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37366 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-31 00:42:15 +00:00
Devang Patel
f38ac5dd39 Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37360 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-30 15:29:37 +00:00
Chris Lattner
39a1c04323 Fix Transforms/ScalarRepl/2007-05-29-MemcpyPreserve.ll and the second 
half of PR1421, by not decimating structs with holes that are the source and
destination of a memcpy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37358 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-30 06:11:23 +00:00
Owen Anderson
2c0c51593d Fix a typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37350 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-29 23:34:14 +00:00
Owen Anderson
e3072b292f Re-fix a bug, where I was now being too aggressive. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37348 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-29 23:26:30 +00:00
Owen Anderson
cdf8efde6a Use proper debugging facilities so other people don't have to look at my commented-out 
debugging lines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37347 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-29 23:15:21 +00:00
Owen Anderson
9b6bd12ef0 Comment debug code out that I accidentally uncommented last time. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37346 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-29 22:43:03 +00:00
Owen Anderson
b502bdb604 Add a place where I missed using the maximal set. Note that using the maximal 
set this way is _SLOW_.  Somewhere down the line, I'll look at speeding it up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37345 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-29 22:35:41 +00:00
Owen Anderson
ea12a06a81 Very first part of a GVN-PRE implementation. It currently performs a bunch of analysis, and nothing more. It is also quite slow for the moment. However, 
it should give a sense of what's going on.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37343 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-29 21:53:49 +00:00
Chris Lattner
7139406707 Fix PR1446 by not scalarrepl'ing giant structures. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37326 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-24 18:43:04 +00:00
Dan Gohman
fa73ea2d9f Minor comment cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37321 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-24 14:36:04 +00:00
Chris Lattner
2b7e0ade62 fix a miscompilation when passing a float through varargs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37297 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-23 01:17:04 +00:00
Chris Lattner
a2b18de4ba Fix Transforms/InstCombine/2007-05-18-CastFoldBug.ll, a bug that devastates 
objc code due to the way the FE lowers objc message sends.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37256 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-19 06:51:32 +00:00
Chris Lattner
fb3e1190fc Handle negative strides much more optimally. This compiles X86/lsr-negative-stride.ll 
into:

_t:
        movl 8(%esp), %ecx
        movl 4(%esp), %eax
        cmpl %ecx, %eax
        je LBB1_3       #bb17
LBB1_1: #bb
        cmpl %ecx, %eax
        jg LBB1_4       #cond_true
LBB1_2: #cond_false
        subl %eax, %ecx
        cmpl %ecx, %eax
        jne LBB1_1      #bb
LBB1_3: #bb17
        ret
LBB1_4: #cond_true
        subl %ecx, %eax
        cmpl %ecx, %eax
        jne LBB1_1      #bb
        jmp LBB1_3      #bb17

instead of:

_t:
        subl $4, %esp
        movl %esi, (%esp)
        movl 12(%esp), %ecx
        movl 8(%esp), %eax
        cmpl %ecx, %eax
        je LBB1_4       #bb17
LBB1_1: #bb.outer
        movl %ecx, %edx
        negl %edx
LBB1_2: #bb
        cmpl %ecx, %eax
        jle LBB1_5      #cond_false
LBB1_3: #cond_true
        addl %edx, %eax
        cmpl %ecx, %eax
        jne LBB1_2      #bb
LBB1_4: #bb17
        movl (%esp), %esi
        addl $4, %esp
        ret
LBB1_5: #cond_false
        movl %ecx, %edx
        subl %eax, %edx
        movl %eax, %esi
        addl %esi, %esi
        cmpl %ecx, %esi
        je LBB1_4       #bb17
LBB1_6: #cond_false.bb.outer_crit_edge
        movl %edx, %ecx
        jmp LBB1_1      #bb.outer


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37252 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-19 01:22:21 +00:00
Devang Patel
9f26f73179 Fix PR1431 
Test case at Transformations/SCCP/2007-05-16-InvokeCrash.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37185 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-17 22:10:15 +00:00
Chris Lattner
ce3e2bff8b selects can also reach here 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37081 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-15 06:42:04 +00:00
Chris Lattner
6b6aef8efc Fix Transforms/InstCombine/2007-05-14-Crash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37057 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-15 00:16:00 +00:00
Dan Gohman
d9efdb2012 Correct a few comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37034 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-14 14:31:17 +00:00
Chris Lattner
79cfddf646 Fix Transforms/GlobalOpt/2007-05-13-Crash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37020 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-13 21:28:07 +00:00
Chris Lattner
7d8ed8a941 significantly improve debug output of lsr 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36996 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-11 22:40:34 +00:00
Dan Gohman
23d9d27c26 Fix typos. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36994 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-11 21:10:54 +00:00
Dan Gohman
c767844fc9 This patch extends the LoopUnroll pass to be able to unroll loops 
with unknown trip counts. This is left off by default, and a
command-line option enables it. It also begins to separate loop
unrolling into a utility routine; eventually it might be made usable
from other passes.

It currently works by inserting conditional branches between each
unrolled iteration, unless it proves that the trip count is a
multiple of a constant integer > 1, which it currently only does in
the rare case that the trip count expression is a Mul operator with
a ConstantInt operand. Eventually this information might be provided
by other sources, for example by a pass that peels/splits the loop
for this purpose.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36990 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-11 20:53:41 +00:00
Chris Lattner
3aea1bdca5 fix regressions from my previous checking, including 
Transforms/InstCombine/2006-12-08-ICmp-Combining.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36989 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-11 16:58:45 +00:00
Chris Lattner
8885887b9c fix Transforms/InstCombine/2007-05-10-icmp-or.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36984 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-11 05:55:56 +00:00
Devang Patel
fd98dc9a76 Fix PR1333 
Testcases :
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049451.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049452.html


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36955 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-09 08:24:12 +00:00
Dan Gohman
1cc0096d55 Fix various whitespace inconsistencies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36936 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-08 15:19:19 +00:00
Dan Gohman
f742c2363c Correct the comment for ApproximateLoopSize to reflect what it actually does. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36935 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-08 15:14:19 +00:00
Dale Johannesen
6603a1bff0 Don't generate branch to entry block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36917 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-08 01:01:04 +00:00
Chris Lattner
1ce6f8da72 Fix PR1395, by passing the ID correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36894 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-06 23:13:56 +00:00
Nick Lewycky
ecd94c804a Fix typo in comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36873 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-06 13:37:16 +00:00
Chris Lattner
6f6f5125e2 Fix a bug in my previous patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36857 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-06 07:24:03 +00:00
Chris Lattner
8c756c1fff Implement Transforms/InstCombine/cast_ptr.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36809 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-05 22:41:33 +00:00
Chris Lattner
d717c1859a wrap long lines 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36807 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-05 22:32:24 +00:00
Chris Lattner
caccc996e2 Fix Transforms/LoopUnroll/2007-05-05-UnrollMiscomp.ll and PR1385. 
If we have a LCSSA, only modify the input value if the inval was defined
by an instruction in the loop.  If defined by something before the loop,
it is still valid.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36784 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-05 18:49:57 +00:00
Chris Lattner
a0c54f3ada make a temporary for *SI, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36782 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-05 18:36:36 +00:00
Chris Lattner
c42e226f08 Fix InstCombine/2007-05-04-Crash.ll and PR1384 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36775 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-05 01:59:31 +00:00
Dan Gohman
e5b01bea7b Use IntrinsicInst to test for prefetch instructions, which is ever so 
slightly nicer than using CallInst with an extra check; thanks Chris.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36743 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-04 14:59:09 +00:00
Dan Gohman
2acc760165 Allow strength reduction to make use of addressing modes for the 
address operand in a prefetch intrinsic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36713 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-03 23:20:33 +00:00
Devang Patel
1997473cf7 Drop 'const' 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36662 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-03 01:11:54 +00:00
Devang Patel
3e15bf33e0 Use 'static const char' instead of 'static const int'. 
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36652 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-02 21:39:20 +00:00
Lauro Ramos Venancio
c718288f49 Fix build error. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36648 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-02 20:37:47 +00:00
Devang Patel
794fd75c67 Do not use typeinfo to identify pass in pass manager. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-05-01 21:15:47 +00:00
Anton Korobeynikov
c6c98af9e5 Implement review feedback 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36564 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-29 18:02:48 +00:00
Anton Korobeynikov
a80e1181b7 Implement review feedback. Aliasees can be either GlobalValue's or 
bitcasts of them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36537 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-28 13:45:00 +00:00
Chris Lattner
7f3c4d49df fix a bug triggered by 403.gcc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36527 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-28 05:27:36 +00:00
Chris Lattner
e62f021c8c Fix several latent bugs in EmitGEPOffset that didn't manifest with its 
previous clients.  This fixes MallocBench/gs


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36525 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-28 04:52:43 +00:00
Chris Lattner
53c22fc7c6 uhn zap cvs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36523 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-28 03:50:56 +00:00
Chris Lattner
9bc1464094 Implement PR1345 and Transforms/InstCombine/bitcast-gep.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36521 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-28 00:57:34 +00:00
Chris Lattner
d3e28347e5 refactor some code relating to pointer cast xforms, pulling it out of the codepath 
for unrelated casts.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36511 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-27 17:44:50 +00:00
Zhou Sheng
c125c00e68 Using APInt more efficiently. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36475 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-26 16:42:07 +00:00
Devang Patel
68c01b3cf3 Mem2Reg does not need TargetData. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36444 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-25 18:32:35 +00:00
Devang Patel
41968df51e Remove unused function argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36441 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-25 17:15:20 +00:00
Anton Korobeynikov
8b0a8c84da Implement aliases. This fixes PR1017 and it's dependent bugs. CFE part 
will follow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36435 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-25 14:27:10 +00:00
Chris Lattner
79b3bd395d If an alloca only has two types of uses: 1) reads 2) a memcpy/memmove that 
copies from a constant global, then we can change the reads to read from the
global instead of from the alloca.  This eliminates the alloca and the memcpy,
and promotes secondary optimizations (because the loads are now loads from
a constant global).

This is important for a common C idiom:

void foo() {
   int A[] = {1,2,3,4,5,6,7,8,9...};
   ... only reads of A ...
}

For some reason, people forget to mark the array static or const.

This triggers on these multisource benchmarks:
JM/ldecode: block_pos, [3 x [4 x [4 x i32]]]
FreeBench/mason: m, [18 x i32], inlined 4 times
MiBench/office-stringsearch: search_strings, [1332 x i8*]
MiBench/office-stringsearch: find_strings, [1333 x i8*]
Prolangs-C++/city: dirs, [9 x i8*], inlined 4 places

and these spec benchmarks:
177.mesa: message, [8 x [32 x i8]]
186.crafty: bias_rl45, [64 x i32]
186.crafty: diag_sq, [64 x i32]
186.crafty: empty, [9 x i8]
186.crafty: xlate, [15 x i8]
186.crafty: status, [13 x i8]
186.crafty: bdinfo, [25 x i8]
445.gobmk: routines, [16 x i8*]
458.sjeng: piece_rep, [14 x i8*]
458.sjeng: t, [13 x i32], inlined 4 places.
464.h264ref: block8x8_idx, [3 x [4 x [4 x i32]]]
464.h264ref: block_pos, [3 x [4 x [4 x i32]]]
464.h264ref: j_off_tab, [12 x i32]

This implements Transforms/ScalarRepl/memcpy-from-global.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36429 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-25 06:40:51 +00:00
Chris Lattner
a10b29b84b refactor the SROA code out into its own method, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36426 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-25 05:02:56 +00:00
Owen Anderson
ab0e4d38f0 Undo my previous changes. Since my approach to this problem is being revised, 
this approach is no longer appropriate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36421 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-25 04:18:54 +00:00
Devang Patel
75abc1ed06 Fix 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070423/048376.html


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36417 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-25 00:37:04 +00:00
Owen Anderson
3a2b58f3ad Rollback some changes that adversely affected performance. I'm currently rethinking 
my approach to this, so hopefully I'll find a way to do this without making this slower.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36392 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-24 06:40:39 +00:00
Devang Patel
2a5fa18997 Fix 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070423/048333.html


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36380 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-23 22:42:03 +00:00
Owen Anderson
1b7f584fd8 Make PredicateSimplifier not use DominatorTree. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36300 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-21 07:38:12 +00:00
Owen Anderson
cdacc498e4 Fix a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36299 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-21 07:12:44 +00:00
Jeff Cohen
09b362cee6 Comment out usage of write() for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36287 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-20 22:40:10 +00:00
Devang Patel
58d7fbf250 Avoid recursion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36272 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-20 20:04:37 +00:00
Owen Anderson
df07335b46 Move more passes to using ETForest instead of DominatorTree. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36271 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-20 06:27:13 +00:00
Zhou Sheng
843f0767ac Make use of ConstantInt::isZero instead of ConstantInt::isNullValue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36261 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-19 05:39:12 +00:00
Zhou Sheng
223d65b651 Make the operations of APInt variables more efficient. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36260 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-19 05:35:00 +00:00
Evan Cheng
cc045d5df8 Revert Owen's last check-in. This is breaking Mac OS X / PPC llvm-gcc bootstrap. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36258 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 22:39:00 +00:00
Owen Anderson
a65064bb3d Revert changes that caused breakage. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36255 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 06:46:57 +00:00
Owen Anderson
325171eed8 Switch more uses of DominatorTree over to ETForest. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36254 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 05:43:13 +00:00
Owen Anderson
fb4b3d117f Use ETForest instead of DominatorTree. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36252 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 05:25:43 +00:00
Owen Anderson
ca2563d2d8 Use ETForest instead of DominatorTree. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36249 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 04:55:33 +00:00
Owen Anderson
ee6dcaf906 Use new ETForest accessor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36248 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 04:46:35 +00:00
Owen Anderson
26c37b1fdc Use ETForest instead of DominatorTree. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36247 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-18 04:39:32 +00:00
Dan Gohman
747603e39e Spell doFinalization right, so that it is a proper virtual override and 
gets called.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36208 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 18:21:36 +00:00
Chris Lattner
261cdfbe5e remove use of BasicBlock::getNext 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36205 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 18:09:47 +00:00
Chris Lattner
e24c92a698 remove use of BasicBlock::getNext 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36202 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 17:54:12 +00:00
Chris Lattner
a0e1b0e98d eliminate use of Instruction::getNext() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36200 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 17:51:03 +00:00
Chris Lattner
decb0ca18b remove use of Instruction::getNext 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36199 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 17:47:54 +00:00
Devang Patel
ac58516cdc Fix 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070416/047888.html


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36182 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-16 23:03:45 +00:00
Anton Korobeynikov
bed2946a96 Removed tabs everywhere except autogenerated & external files. Add make 
target for tabs checking.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36146 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-16 18:10:23 +00:00
Chris Lattner
a6a996d319 Fix PR1335 and Transforms/Inline/2007-04-15-InlineEH.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36090 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-15 21:38:06 +00:00
Owen Anderson
3dc6776b33 Remove ImmediateDominator analysis. The same information can be obtained from DomTree. A lot of code for 
constructing ImmediateDominator is now folded into DomTree construction.

This is part of the ongoing work for PR217.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36063 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-15 08:47:27 +00:00
Chris Lattner
83ae2fcacc fix SimplifyLibCalls/IsDigit.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36047 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-15 05:38:40 +00:00
Chris Lattner
31755a024d Extend store merging to support the 'if/then' version in addition to if/then/else. 
This sinks the two stores in this example into a single store in cond_next.  In this
case, it allows elimination of the load as well:

        store double 0.000000e+00, double* @s.3060
        %tmp3 = fcmp ogt double %tmp1, 5.000000e-01             ; <i1> [#uses=1]
        br i1 %tmp3, label %cond_true, label %cond_next
cond_true:              ; preds = %entry
        store double 1.000000e+00, double* @s.3060
        br label %cond_next
cond_next:              ; preds = %entry, %cond_true
        %tmp6 = load double* @s.3060            ; <double> [#uses=1]

This implements Transforms/InstCombine/store-merge.ll:test2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36040 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-15 01:02:18 +00:00
Chris Lattner
3284d1f18a refactor some code, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36037 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-15 00:07:55 +00:00
Chris Lattner
e34e9a29dc fix long lines 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36031 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 23:32:02 +00:00
Chris Lattner
b7300fa8d2 Implement Transforms/InstCombine/vec_extract_elt.ll, transforming: 
define i32 @test(float %f) {
        %tmp7 = insertelement <4 x float> undef, float %f, i32 0
        %tmp17 = bitcast <4 x float> %tmp7 to <4 x i32>
        %tmp19 = extractelement <4 x i32> %tmp17, i32 0
        ret i32 %tmp19
}

into:

define i32 @test(float %f) {
        %tmp19 = bitcast float %f to i32                ; <i32> [#uses=1]
        ret i32 %tmp19
}

On PPC, this is the difference between:

_test:
        mfspr r2, 256
        oris r3, r2, 8192
        mtspr 256, r3
        stfs f1, -16(r1)
        addi r3, r1, -16
        addi r4, r1, -32
        lvx v2, 0, r3
        stvx v2, 0, r4
        lwz r3, -32(r1)
        mtspr 256, r2
        blr

and:

_test:
        stfs f1, -4(r1)
        nop
        nop
        nop
        lwz r3, -4(r1)
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36025 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 23:02:14 +00:00
Chris Lattner
6987833651 Implement InstCombine/vec_demanded_elts.ll:test2. This allows us to turn 
unsigned test(float f) {
 return _mm_cvtsi128_si32( (__m128i) _mm_set_ss( f*f ));
}

into:

_test:
        movss 4(%esp), %xmm0
        mulss %xmm0, %xmm0
        movd %xmm0, %eax
        ret

instead of:

_test:
        movss 4(%esp), %xmm0
        mulss %xmm0, %xmm0
        xorps %xmm1, %xmm1
        movss %xmm0, %xmm1
        movd %xmm1, %eax
        ret

GCC gets:

_test:
        subl    $28, %esp
        movss   32(%esp), %xmm0
        mulss   %xmm0, %xmm0
        xorps   %xmm1, %xmm1
        movss   %xmm0, %xmm1
        movaps  %xmm1, %xmm0
        movd    %xmm0, 12(%esp)
        movl    12(%esp), %eax
        addl    $28, %esp
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36020 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 22:29:23 +00:00
Chris Lattner
d6b7a1648c avoid copying sets and vectors around. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36017 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 22:10:17 +00:00
Chris Lattner
ae143ceb83 avoid iterator invalidation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36002 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 18:06:52 +00:00
Jeff Cohen
98a72203d7 An even better fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35998 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 17:18:29 +00:00
Jeff Cohen
e4aee1d3a4 Fix recent regression that broke several llvm-tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35996 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 16:55:19 +00:00
Chris Lattner
35b9b49fd1 Implement a few missing xforms: printf("foo\n") -> puts. printf("x") -> putchar 
printf("") -> noop.  Still need to do the xforms for fprintf.

This implements Transforms/SimplifyLibCalls/Printf.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35984 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 01:17:48 +00:00
Chris Lattner
8264a9fcca in addition to merging, constantmerge should also delete trivially dead globals, 
in order to clean up after simplifylibcalls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35982 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 01:11:54 +00:00
Chris Lattner
6fe5541003 Implement PR1201 and test/Transforms/InstCombine/malloc-free-delete.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35981 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 00:20:02 +00:00
Chris Lattner
f25646bfb3 use an accessor to simplify code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35979 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 00:17:39 +00:00
Chris Lattner
c5494af8a9 Now that codegen prepare isn't defeating me, I can finally fix what I set 
out to do! :)

This fixes a problem where LSR would insert a bunch of code into each MBB
that uses a particular subexpression (e.g. IV+base+C).  The problem is that
this code cannot be CSE'd back together if inserted into different blocks.

This patch changes LSR to attempt to insert a single copy of this code and
share it, allowing codegenprepare to duplicate the code if it can be sunk
into various addressing modes.  On CodeGen/ARM/lsr-code-insertion.ll,
for example, this gives us code like:

        add r8, r0, r5
        str r6, [r8, #+4]
..
        ble LBB1_4      @cond_next
LBB1_3: @cond_true
        str r10, [r8, #+4]
LBB1_4: @cond_next
...
LBB1_5: @cond_true55
        ldr r6, LCPI1_1
        str r6, [r8, #+4]

instead of:

        add r10, r0, r6
        str r8, [r10, #+4]
...
        ble LBB1_4      @cond_next
LBB1_3: @cond_true
        add r8, r0, r6
        str r10, [r8, #+4]
LBB1_4: @cond_next
...
LBB1_5: @cond_true55
        add r8, r0, r6
        ldr r10, LCPI1_1
        str r10, [r8, #+4]

Besides being smaller and more efficient, this makes it immediately
obvious that it is profitable to predicate LBB1_3 now :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35972 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-13 20:42:26 +00:00
Chris Lattner
dd77df3cbc Completely rewrite addressing-mode related sinking of code. In particular, 
this fixes problems where codegenprepare would sink expressions into load/stores
that are not valid, and fixes cases where it would miss important valid ones.

This fixes several serious codesize and perf issues, particularly on targets
with complex addressing modes like arm and x86.  For example, now we compile
CodeGen/X86/isel-sink.ll to:

_test:
        movl 8(%esp), %eax
        movl 4(%esp), %ecx
        cmpl $1233, %eax
        ja LBB1_2       #F
LBB1_1: #T
        movl $4, (%ecx,%eax,4)
        movl $141, %eax
        ret
LBB1_2: #F
        movl (%ecx,%eax,4), %eax
        ret

instead of:

_test:
        movl 8(%esp), %eax
        leal (,%eax,4), %ecx
        addl 4(%esp), %ecx
        cmpl $1233, %eax
        ja LBB1_2       #F
LBB1_1: #T
        movl $4, (%ecx)
        movl $141, %eax
        ret
LBB1_2: #F
        movl (%ecx), %eax
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35970 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-13 20:30:56 +00:00
Devang Patel
4beccb897d Remove use of SlowOperationInformer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35967 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-13 18:58:18 +00:00
Devang Patel
60b0d84594 Undo previous check-in. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35966 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-13 18:35:15 +00:00
Devang Patel
02c768608a Hello uses LLVMSupport.a (SlowerOperationInformer) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35965 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-13 18:28:23 +00:00
Lauro Ramos Venancio
c763552299 Implement the "thread_local" keyword. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35950 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-12 18:32:50 +00:00
Reid Spencer
3234b3e1f2 Build Hello by default so it can be used in test cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35922 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 21:03:37 +00:00
Chris Lattner
ab46275683 Fix Transforms/ScalarRepl/union-pointer.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35906 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 15:45:25 +00:00
Chris Lattner
8a9f571052 Turn stuff like: 
icmp slt i32 %X, 0              ; <i1>:0 [#uses=1]
        sext i1 %0 to i32               ; <i32>:1 [#uses=1]

into:

        %X.lobit = ashr i32 %X, 31              ; <i32> [#uses=1]

This implements InstCombine/icmp.ll:test[34]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35891 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 06:57:46 +00:00
Chris Lattner
a2e2c9bbf3 Simplify some comparisons to arithmetic, this implements: 
Transforms/InstCombine/icmp.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35890 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 06:53:04 +00:00
Chris Lattner
ba41783dbb canonicalize (x <u 2147483648) -> (x >s -1) and (x >u 2147483647) -> (x <s 0) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35886 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 06:12:58 +00:00
Chris Lattner
66bc325bff fix a miscompilation of: 
define i32 @test(i32 %X) {
entry:
        %Y = and i32 %X, 4              ; <i32> [#uses=1]
        icmp eq i32 %Y, 0               ; <i1>:0 [#uses=1]
        sext i1 %0 to i32               ; <i32>:1 [#uses=1]
        ret i32 %1
}

by moving code out of commonIntCastTransforms into visitZExt.  Simplify the
APInt gymnastics in it etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35885 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 05:45:39 +00:00
Chris Lattner
ed4e51e58e fix a regression introduced by my last patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35879 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 03:27:24 +00:00
Chris Lattner
f4b1818728 Simplify SROA conversion to integer in some ways, make it more general in others. 
We now tolerate small amounts of undefined behavior, better emulating what
would happen if the transaction actually occurred in memory.  This fixes
SingleSource/UnitTests/2007-04-10-BitfieldTest.c on PPC, at least until
Devang gets a chance to fix the CFE from doing undefined things with bitfields :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35875 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-11 00:57:54 +00:00
Chris Lattner
81973ef7cb Strengthen the boundary conditions of this fold, implementing 
InstCombine/set.ll:test25


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35852 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 23:52:13 +00:00
Owen Anderson
cc221cdf0c Re-constify things that don't break the build. Last patch in this 
series, I promise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35848 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 23:38:18 +00:00
Chris Lattner
9fda270e2c eliminate the last uses of some TLI methods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35844 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 23:29:07 +00:00
Owen Anderson
f7c83188cd Unconst-ify stuff that broke the build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35843 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 23:08:26 +00:00
Owen Anderson
ad19014591 Const-ify some parameters, and some cosmetic cleanups. No functionality 
change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35842 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 22:54:50 +00:00
Owen Anderson
0cd0461873 Tabs -> Spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35841 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 22:31:43 +00:00
Owen Anderson
17cba6d232 Improve some _slow_ behavior introduced in my patches the last few days. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35839 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 22:25:09 +00:00
Chris Lattner
579633cd10 switch LSR to use isLegalAddressingMode instead of other simpler hooks 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35837 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 22:20:14 +00:00
Devang Patel
6c36157f3d Check _all_ PHINodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35836 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 22:20:10 +00:00
Devang Patel
c415afc726 Insert new pre-header before new header. Original pre-header may 
happen to be an entry, in such case, it is not a good idea to
insert new block before entry.

Also fix typo in assertion check.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35833 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 21:40:43 +00:00
Devang Patel
5464b96073 Preserve canonical loop form. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35829 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 20:19:46 +00:00
Reid Spencer
9101d8647f Don't link against System or Support library. These things will already 
be in the opt tool.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35827 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 19:17:47 +00:00
Devang Patel
e98815469c Do not create new pre-header. Reuse original pre-header. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35825 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 19:04:21 +00:00
Devang Patel
4522c8a44c Simpler for() loops. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35822 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 17:09:13 +00:00
Devang Patel
cfde9594d1 Fix future bug. Of course, Chris spotted this. 
Handle Argument or Undef as an incoming PHI value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35821 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 16:41:46 +00:00
Devang Patel
24a1c49172 More cosmetic changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35820 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 16:21:29 +00:00
Devang Patel
322313376a Only cosmetic changes. Zero functionality Change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35819 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 16:11:48 +00:00
Chris Lattner
8546409d1b Fix PR1304 and Transforms/InstCombine/2007-04-08-SingleEltVectorCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35792 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 01:37:55 +00:00
Chris Lattner
599ded1a7f Eliminate useless insertelement instructions. This implements 
Transforms/InstCombine/vec_insertelt.ll and fixes PR1286.

We now compile the code from that bug into:

_foo:
        movl 4(%esp), %eax
        movdqa (%eax), %xmm0
        movl 8(%esp), %ecx
        psllw (%ecx), %xmm0
        movdqa %xmm0, (%eax)
        ret

instead of:

_foo:
        subl $4, %esp
        movl %ebp, (%esp)
        movl %esp, %ebp
        movl 12(%ebp), %eax
        movdqa (%eax), %xmm0
        #IMPLICIT_DEF %eax
        pinsrw $2, %eax, %xmm0
        xorl %ecx, %ecx
        pinsrw $3, %ecx, %xmm0
        pinsrw $4, %eax, %xmm0
        pinsrw $5, %ecx, %xmm0
        pinsrw $6, %eax, %xmm0
        pinsrw $7, %ecx, %xmm0
        movl 8(%ebp), %eax
        movdqa (%eax), %xmm1
        psllw %xmm0, %xmm1
        movdqa %xmm1, (%eax)
        movl %ebp, %esp
        popl %ebp
        ret

woo :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35788 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 01:11:16 +00:00
Owen Anderson
558fc740da Cleanup some from my DomSet-removal changes. Add a new 
isReachableFromEntry
test to ETForest to factor a common test out of code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35786 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-09 00:52:49 +00:00
Chris Lattner
51047859ed Fix a typo that broke SimplifyLibCalls/SPrintF.ll (pr1315) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35768 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-08 18:11:26 +00:00
Chris Lattner
044e5337f5 reenable this xform, whoops :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35765 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-08 08:01:49 +00:00
Chris Lattner
6cae0e06ac Fix regression on Instcombine/apint-or2.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35763 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-08 07:55:22 +00:00
Chris Lattner
c5e7ea49eb Generalize the code that handles (A&B)|(A&C) to work where B/C are not constants. 
Add a new xform to simplify (A&B)|(~A&C).  THis implements InstCombine/or2.ll:test1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35760 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-08 07:47:01 +00:00
Chris Lattner
5cef3c6eb7 implement a fixme: move optimizations for fwrite out of fputs into a new 
fwrite optimizer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35758 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-08 07:00:35 +00:00
Nick Lewycky
a397ce1cc2 Remove DominatorSet usage from LoopSimplify. Patch from Owen Anderson. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35757 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-08 01:04:30 +00:00
Chris Lattner
0cd3a23d2a Significantly simplify the clients of GetConstantStringInfo, by having it 
just return the string itself.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35755 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 21:58:02 +00:00
Chris Lattner
73f5d42a97 Fix problems in the sprintf optimizer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35754 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 21:17:51 +00:00
Chris Lattner
3492cda48f Change CastToCStr to take a pointer instead of a reference. 
Fix some miscompilations in fprintf optimizer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35753 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 21:04:50 +00:00
Chris Lattner
af33e6579a Fix an off-by-one error that broke Prolangs/deriv2 with llc on x86 
and Prolangs-C/cdecl


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35749 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 20:19:08 +00:00
Owen Anderson
e9ed4452bc Add DomSet back, and revert the changes to LoopSimplify. Apparently the 
ETForest updating mechanisms don't work as I thought they did.  These changes
will be reapplied once the issue is worked out.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35741 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 18:23:27 +00:00
Nick Lewycky
ac4d664d45 Add support for cast instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35734 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 15:48:32 +00:00
Owen Anderson
ba43963e96 Completely purge DomSet. This is the (hopefully) final patch for PR1171. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35731 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 07:17:27 +00:00
Owen Anderson
4f9e58ecdf Completely purge DomSet from LoopSimplify. This is part of the 
continuing work on PR1171.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35730 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 06:56:47 +00:00
Owen Anderson
a3ca0b648c BreakCriticalEdges does still preserve DominatorTree. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35729 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 05:57:09 +00:00
Owen Anderson
2d43519454 Expunge DomSet from BreakCriticalEdges. This is part of the continuing 
work for PR 1171.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35728 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 05:49:29 +00:00
Owen Anderson
c6fcf29e81 Expunge DomSet from CodeExtractor. This is part of the continuing work 
on PR1171.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35726 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 05:31:27 +00:00
Nick Lewycky
a995d920d5 Support NE inequality in ValueRanges. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35724 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 04:49:12 +00:00
Owen Anderson
d44008ae40 Expunge a bunch of uses of DomSet from LoopSimplify. Many more remain. 
This is the beginning of work for PR1171.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35720 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 04:37:14 +00:00
Nick Lewycky
f3a9e368f6 Cleanup. Refactor out the applying of value ranges to its own method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35719 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 03:36:51 +00:00
Nick Lewycky
b01c77e137 Use TargetData to find the size of a type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35718 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 03:16:12 +00:00
Nick Lewycky
8ac40dd747 Strengthen icmp snuggling by doing 'compare-or-equal-to' to 'compare' 
first and then range testing second.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35715 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 02:30:14 +00:00
Devang Patel
c4625da483 Add loop rotation pass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35714 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 01:25:15 +00:00
Chris Lattner
045af54275 fix a miscompilation in printf optimizer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35713 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 01:18:36 +00:00
Chris Lattner
ef4fd35726 trunc to bool no longer compares against zero 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35712 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 01:03:46 +00:00
Chris Lattner
71bf3e2ef9 cleanups for strlen optimizer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35711 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 01:02:00 +00:00
Chris Lattner
679d7188c7 Introduce a new ReplaceCallWith method, which simplifies a lot of code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35710 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 00:42:32 +00:00
Chris Lattner
db895b82a3 fixes for strcpy optimizer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35709 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 00:26:18 +00:00
Chris Lattner
7b50c8f278 Fix bugs in strncmp. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35708 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 00:06:57 +00:00
Chris Lattner
ceb375ecf2 fix 3 miscompilations and several compielr crashes in strcmp optimizer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35707 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-07 00:01:51 +00:00
Chris Lattner
6897fe5861 Fix several nasty bugs in the strchr optimizer, this fixes 
SimplifyLibCalls/2007-04-06-strchr-miscompile.ll and PR1307


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35706 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-06 23:38:55 +00:00
Chris Lattner
09c11aa7f5 clean up strcat optimizer, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35704 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-06 22:59:33 +00:00
Chris Lattner
c8e1741bb9 rename getConstantStringLength -> GetConstantStringInfo. Make it return 
the start index of the array as well as the length.  No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35703 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-06 22:54:17 +00:00
Chris Lattner
4802d90ca8 implement Transforms/InstCombine/malloc2.ll and PR1313 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35700 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-06 18:57:34 +00:00
Chris Lattner
4913bf47fd Fix Transforms/GlobalOpt/2007-04-05-Crash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35689 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-05 21:09:42 +00:00
Chris Lattner
1984a32867 Use a worklist-driven algorithm instead of a recursive one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35680 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-05 01:27:02 +00:00
Dale Johannesen
16ff304e2c Prevent transformConstExprCastCall from generating conversions that assert 
elsewhere.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35668 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-04 19:16:42 +00:00
Jeff Cohen
86796bec50 Fix 2007-04-04-BadFoldBitcastIntoMalloc.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35665 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-04 16:58:57 +00:00
Duncan Sands
0091bf2439 Fix comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35655 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-04 06:42:45 +00:00
Chris Lattner
7305084156 Fix a bug I introduced with my patch yesterday which broke Qt (I converted 
some constant exprs to apints).

Thanks to Anton for tracking down a small testcase that triggered this!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35633 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-03 23:29:39 +00:00
Chris Lattner
01deb9d91c reinstate the previous two patches, with a bugfix :) 
ldecod now passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35626 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-03 17:43:25 +00:00
Evan Cheng
d89f41e9bb Reverting back to 1.723. The last two commits broke JM (and possibily others) on ARM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35620 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-03 08:11:50 +00:00
Chris Lattner
aed01d1931 split some code out into a helper function 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35615 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-03 05:11:24 +00:00
Chris Lattner
01d8c107ac Split a whole ton of code out of visitICmpInst into visitICmpInstWithInstAndIntCst. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35614 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-03 04:46:52 +00:00
Chris Lattner
44ad43033e Fix PR1253 and xor2.ll:test[01] 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35612 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-03 01:47:41 +00:00
Chris Lattner
1d31290634 allow -1 strides to reuse "1" strides. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35607 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 22:51:58 +00:00
Zhou Sheng
4a1822a6d8 1. Make use of APInt operation instead of using ConstantExpr::getXXX. 
2. Use cheaper APInt methods.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35594 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 13:45:30 +00:00
Zhou Sheng
4351c649b2 Use uint32_t for bitwidth instead of unsigned. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35593 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 08:20:41 +00:00
Chris Lattner
1ebd89eb6b Pass the type of the store access, not the type of the store, into the 
target hook.  This allows us to codegen a loop as:

LBB1_1: @cond_next
        mov r2, #0
        str r2, [r0, +r3, lsl #2]
        add r3, r3, #1
        cmn r3, #1
        bne LBB1_1      @cond_next

instead of:

LBB1_1: @cond_next
        mov r2, #0
        str r2, [r0], #+4
        add r3, r3, #1
        cmn r3, #1
        bne LBB1_1      @cond_next

This looks the same, but has one fewer induction variable (and therefore,
one fewer register) live in the loop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35592 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 06:34:44 +00:00
Chris Lattner
cd1d6d5b03 Wrap long line 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35588 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 05:48:58 +00:00
Chris Lattner
acf4e074a9 use more obvious function name. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35587 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 05:42:22 +00:00
Chris Lattner
5c6e2db0c4 simplify (x+c)^signbit as (x+c+signbit), pointed out by PR1288. This implements 
test/Transforms/InstCombine/xor.ll:test28


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35584 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 05:36:22 +00:00
Chris Lattner
c995123182 reduce use of std::set 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35576 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 01:44:59 +00:00
Chris Lattner
d9c3a0d7cc Various passes before isel split edges and do other CFG-restructuring changes. 
isel has its own particular features that it wants in the CFG, in order to
reduce the number of times a constant is computed, etc.  Make sure that we
clean up the CFG before doing any other things for isel.  Doing so can
dramatically reduce the number of split edges and reduce the number of
places that constants get computed.  For example, this shrinks
CodeGen/Generic/phi-immediate-factoring.ll from 44 to 37 instructions on X86,
and from 21 to 17 MBB's in the output.  This is primarily a code size win,
not a performance win.

This implements CodeGen/Generic/phi-immediate-factoring.ll and PR1296.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35575 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-02 01:35:34 +00:00
Chris Lattner
fe35555d09 print the type of an inserted IV in -debug mode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35563 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-01 22:21:39 +00:00
Chris Lattner
55fc8c4c39 simplify this code, make it work for ap ints 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35561 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-01 20:57:36 +00:00
Zhou Sheng
3a507fda84 Avoid unnecessary APInt construction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35555 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-01 17:13:37 +00:00
Reid Spencer
e9391fd9b5 For PR1297: 
Support overloaded intrinsics bswap, ctpop, cttz, ctlz.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35547 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-01 07:35:23 +00:00
Chris Lattner
6abbdf90dd Fix InstCombine/2007-03-31-InfiniteLoop.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35536 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-01 05:36:37 +00:00
Chris Lattner
dbe0deca33 Split the sdisel code munging stuff out into its own opt-pass, CodeGenPrepare. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35528 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-31 04:06:36 +00:00
Zhou Sheng
1c5d163634 Delete dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35525 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-31 02:50:26 +00:00
Zhou Sheng
b9cb95f8e3 Use APInt operators to calculate the carry bits, remove this loop. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35524 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-31 02:38:39 +00:00
Zhou Sheng
302748dd30 Make sure the use of ConstantInt::getZExtValue() for shift amount safe. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35510 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-30 17:20:39 +00:00
Zhou Sheng
0e2d3ac0f8 1. Make sure the use of ConstantInt::getZExtValue() for getting shift 
amount is safe.
2. Use new method on ConstantInt instead of (? :) operator.
3. Use new method uge() on ConstantInt to simplify codes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35505 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-30 09:29:48 +00:00
Zhou Sheng
90b9681886 Use APInt operation instead of ConstantExpr::getXX. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35503 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-30 05:45:18 +00:00
Zhou Sheng
290bec5c15 1. Make more use of APInt::getHighBitsSet/getLowBitsSet. 
2. Let APInt variable do the binary operation stuff instead of using
   ConstantExpr::getXXX.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35450 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-29 08:15:12 +00:00
Zhou Sheng
d48653a3ab Clean up some codes in InstCombiner::SimplifyDemandedBits(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35446 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-29 04:45:55 +00:00
Zhou Sheng
01542f3d80 Clean up codes in InstCombiner::SimplifyDemandedBits(): 
1. Line out nested call of APInt::zext/trunc.
2. Make more use of APInt::getHighBitsSet/getLowBitsSet.
3. Use APInt[] operator instead of expression like "APIntVal & SignBit".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35444 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-29 02:26:30 +00:00
Zhou Sheng
97b52c260f 1. Make the APInt variable do the binary operation stuff if possible 
instead of using ConstantExpr::getXX.
2. Use constant reference to APInt if possible instead of expensive
   APInt copy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35443 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-29 01:57:21 +00:00
Zhou Sheng
34a4b38cbd Avoid unnecessary APInt construction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35431 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-28 17:38:21 +00:00
Zhou Sheng
e9e03f6b76 1. Make more use of getLowBitsSet/getHighBitsSet. 
2. Use APInt[] instead of "X & SignBit".
3. Clean up some codes.
4. Make the expression like "ShiftAmt = ShiftAmtC->getZExtValue()" safe.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35424 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-28 15:02:20 +00:00
Zhou Sheng
e82fca09bf 1. Make more use of getLowBitsSet/getHighBitsSet. 
2. Make the APInt value do the zext/trunc stuff instead of using
   ConstantExpr::getZExt().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35422 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-28 09:19:01 +00:00
Zhou Sheng
4acf155af3 Use UnknownBIts[BitWidth-1] instead of UnknownBIts & SignBits. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35418 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-28 05:15:57 +00:00
Zhou Sheng
b32c00603b Remove unused APInt variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35414 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-28 03:02:21 +00:00
Zhou Sheng
aa305ab5e8 Clean up codes in ComputeMaskedBits(): 
1. Line out nested use of zext/trunc.
2. Make more use of getHighBitsSet/getLowBitsSet.
3. Use APInt[] != 0 instead of "(APInt & SignBit) != 0".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35408 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-28 02:19:03 +00:00
Reid Spencer
35c3885ba1 For PR1280: 
When converting an add/xor/and triplet into a trunc/sext, only do so if the
intermediate integer type is a bitwidth that the targets can handle.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35400 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-28 01:36:16 +00:00
Evan Cheng
c7baf687ba Unbreaks non-debug builds. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35383 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-27 16:44:48 +00:00
Reid Spencer
6eb0d99f5f Implement some minor review feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35373 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-26 23:58:26 +00:00
Reid Spencer
68d27cf84e For PR1271: 
Fix another incorrectly converted shift mask.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35371 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-26 23:45:51 +00:00
Devang Patel
d64d3a1d28 Reduce malloc/free traffic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35370 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-26 23:19:29 +00:00
Chris Lattner
0e5444bb20 eliminate use of std::set 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35361 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-26 20:40:50 +00:00
Reid Spencer
a9b8101333 Get better debug output by having modified instructions print both the 
original and new instruction. A slight performance hit with ostringstream
but it is only for debug.
Also, clean up an uninitialized variable warning noticed in a release build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35358 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-26 17:44:01 +00:00
Reid Spencer
d5e30f0a01 Get the number of bits to set in a mask correct for a shl/lshr transform. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35357 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-26 17:18:58 +00:00
Reid Spencer
1be1284fe6 For PR1271: 
Fix SingleSource/Regression/C/2003-05-21-UnionBitFields.c by changing a
getHighBitsSet call to getLowBitsSet call that was incorrectly converted
from the original lshr constant expression.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35348 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-26 05:25:00 +00:00
Dale Johannesen
da91f49751 Look through bitcast when finding IVs. (Chris' patch really.) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35347 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-26 03:01:27 +00:00
Reid Spencer
55702aaa52 For PR1271: 
Remove a use of getLowBitsSet that caused the mask used for replacement of
shl/lshr pairs with an AND instruction to be computed incorrectly. Its not
clear exactly why this is the case. This solves the disappearing shifts
problem, but it doesn't fix Regression/C/2003-05-21-UnionBitFields. It
seems there is more going on.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35342 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-25 21:11:44 +00:00
Chris Lattner
db9654e284 implement Transforms/InstCombine/cast2.ll:test3 and PR1263 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35341 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-25 20:43:09 +00:00
Reid Spencer
2149a9dfec Some cleanup from review: 
* Don't assume shift amounts are <= 64 bits
* Avoid creating an extra APInt in SubOne and AddOne by using -- and ++
* Add another use of getLowBitsSet
* Convert a series of if statements to a switch


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35339 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-25 19:55:33 +00:00
Reid Spencer
7177c3a60a Refactor several ConstantExpr::getXXX calls with ConstantInt arguments 
using the facilities of APInt. While this duplicates a tiny fraction of
the constant folding code, it also makes the code easier to read and
avoids large ConstantExpr overhead for simple, known computations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35335 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-25 05:33:51 +00:00
Zhou Sheng
0fc5095d0e 1. Avoid unnecessary APInt construction if possible. 
2. Use isStrictlyPositive() instead of isPositive() in two places where
   they need APInt value > 0 not only >=0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35333 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-25 05:01:29 +00:00
Reid Spencer
2f5491791b Make more uses of getHighBitsSet and get rid of some pointless & of an 
APInt with its type mask.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35325 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-25 04:26:16 +00:00
Reid Spencer
2b81207b4b More APIntification: 
* Convert the last use of a uint64_t that should have been an APInt.
* Change ComputeMaskedBits to have a const reference argument for the Mask
  so that recursions don't cause unneeded temporaries. This causes temps
  to be needed in other places (where the mask has to change) but this
  change optimizes for the recursion which is more frequent.
* Remove two instances of &ing a Mask with getAllOnesValue. Its not
  needed any more because APInt is accurate in its bit computations.
* Start using the getLowBitsSet and getHighBits set methods on APInt
  instead of shifting. This makes it more clear in the code what is
  going on.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35321 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-25 02:03:12 +00:00
Chris Lattner
42593e69e2 fix a regression on vector or instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35314 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-24 23:56:43 +00:00
Zhou Sheng
00f436c5bc Make some codes more efficient. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35297 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-24 15:34:37 +00:00
Reid Spencer
f244252740 For PR1205: 
Convert some calls to ConstantInt::getZExtValue() into getValue() and
use APInt facilities in the subsequent computations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35294 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-24 00:42:08 +00:00
Reid Spencer
2ec619a29a For PR1205: 
* APIntify visitAdd and visitSelectInst
* Remove unused uint64_t versions of utility functions that have been
  replaced with APInt versions.
This completes most of the changes for APIntification of InstCombine. This
passes llvm-test and llvm/test/Transforms/InstCombine/APInt.

Patch by Zhou Sheng.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35287 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-23 21:24:59 +00:00
Reid Spencer
bca0e38baa For PR1205: 
APIntify visitDiv, visitMul and visitRem.

Patch by Zhou Sheng.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35283 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-23 20:05:17 +00:00
Chris Lattner
2c7718a539 switch AddReachableCodeToWorklist from being recursive to being iterative. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35282 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-23 19:17:18 +00:00
Reid Spencer
b35ae0371a For PR1205: 
APIntify several utility functions supporting logical operators and shift
operators.

Patch by Zhou Sheng.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35281 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-23 18:46:34 +00:00
Zhou Sheng
f62cc9f9e5 Make the "KnownZero ^ TypeMask" computation just once. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35276 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-23 03:13:21 +00:00
Zhou Sheng
9c636fe6f2 Simplify the code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35275 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-23 02:39:25 +00:00
Reid Spencer
a03d45fa88 For PR1205: 
APInt support for logical operators in visitAnd, visitOr, and visitXor.

Patch by Zhou Sheng.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35273 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-22 22:19:58 +00:00
Reid Spencer
ad6676e81b For PR1205: 
* APIntify commonIntCastTransforms
* APIntify visitTrunc
* APIntify visitZExt

Patch by Zhou Sheng.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35271 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-22 20:56:53 +00:00
Reid Spencer
0460fb3ea5 For PR1205: 
* Re-enable the APInt version of MaskedValueIsZero.
* APIntify the Comput{Un}SignedMinMaxValuesFromKnownBits functions
* APIntify visitICmpInst.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35270 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-22 20:36:03 +00:00
Dan Gohman
ecb7a77885 Change uses of Function::front to Function::getEntryBlock for readability. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35265 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-22 16:38:57 +00:00
Nick Lewycky
27e4da93b6 Fix broken optimization disabled by a logic bug. 
Analyze GEPs. If the indices are all zero, transfer whether the pointer is
known to be not null through the GEP.

Add a few more cases for xor and shift instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35257 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-22 02:02:51 +00:00
Reid Spencer
e4e4003032 For PR1248: 
* Fix some indentation and comments in InsertRangeTest
* Add an "IsSigned" parameter to AddWithOverflow and make it handle signed
  additions. Also, APIntify this function so it works with any bitwidth.
* For the icmp pred ([us]div %X, C1), C2 transforms, exit early if the
  div instruction's RHS is zero.
* Finally, for icmp pred (sdiv %X, C1), -C2, fix an off-by-one error. The
  HiBound needs to be incremented in order to get the range test correct.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35247 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-21 23:19:50 +00:00
Dale Johannesen
8e59e163db do not share old induction variables when this would result in invalid 
instructions (that would have to be split later)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35227 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-20 21:54:54 +00:00
Jeff Cohen
c01a53007a Fix some VC++ warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35224 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-20 20:43:18 +00:00
Devang Patel
3b57b6f36e LoopSimplify::FindPHIToPartitionLoops() 
Use ETForest instead of DominatorSet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35221 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-20 20:18:12 +00:00
Zhou Sheng
2cde46cb66 Simplify isHighOnes(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35211 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-20 12:49:06 +00:00
Dale Johannesen
dc42f48ea9 use types of loads and stores, not address, in CheckForIVReuse 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35197 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-20 00:47:50 +00:00
Reid Spencer
5f6a89562d Make isOneBitSet faster by using APInt::isPowerOf2. Thanks Chris. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35194 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-20 00:16:52 +00:00
Reid Spencer
05227d88af APIntify the isHighOnes utility function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35190 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 21:29:50 +00:00
Reid Spencer
3a2a9fbf99 Implement isMaxValueMinusOne in terms of APInt instead of uint64_t. 
Patch by Sheng Zhou.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35188 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 21:10:28 +00:00
Reid Spencer
727992c30a Implement isMinValuePlusOne using facilities of APInt instead of uint64_t 
Patch by Zhou Sheng.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35187 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 21:08:07 +00:00
Reid Spencer
44e33e674a Implement isOneBitSet in terms of APInt::countPopulation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35186 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 21:04:43 +00:00
Reid Spencer
5a1e3e1a7d 1. Use APInt::getSignBit to reduce clutter (patch by Sheng Zhou) 
2. Replace uses of the "isPositive" utility function with APInt::isPositive


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35185 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 20:58:18 +00:00
Reid Spencer
8439bc8d69 Remove a redundant clause in an if statement. 
Patch by Sheng Zhou.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35184 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 20:47:50 +00:00
Chris Lattner
a9d1a843fc fix ScalarRepl/2007-03-19-CanonicalizeMemcpy.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35169 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 18:25:57 +00:00
Chris Lattner
8bf9911932 implement the next chunk of SROA with memset/memcpy's of aggregates. This 
implements Transforms/ScalarRepl/memset-aggregate-byte-leader.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35150 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-19 00:16:43 +00:00
Nick Lewycky
3f64b1ab1d Clean up this code and fix subtract miscompile. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35146 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-18 22:58:46 +00:00
Chris Lattner
318bf7963a Implement InstCombine/and-xor-merge.ll:test[12]. 
Rearrange some code to simplify it now that shifts are binops


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35145 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-18 22:51:34 +00:00
Nick Lewycky
1eda0f60d7 Propagate ValueRanges across equality. 
Add some more micro-optimizations: x * 0 = 0, a - x = a --> x = 0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35138 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-18 01:09:32 +00:00
Anton Korobeynikov
1cc6452181 Silence warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35137 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-17 14:48:06 +00:00
Nick Lewycky
4c70875774 Add more comments and update to new asm syntax. 
Add new micro-optimizations.

Add icmp predicate snuggling. Given %x ULT 4, "icmp ugt %x, 2" becomes
"icmp eq %x, 3". This doesn't apply in any non-trivial cases yet due to missing
support for NE values in ValueRanges.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35119 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-16 02:37:39 +00:00
Zhou Sheng
adc149549d ShiftAmt might equal to zero. Handle this situation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35094 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-14 09:07:33 +00:00
Zhou Sheng
9670445cd4 Enable KnownZero/One.clear(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35093 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-14 03:21:24 +00:00
Evan Cheng
1d95816db5 Correct type info for isLegalAddressImmediate() check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35086 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-13 20:34:37 +00:00
Chris Lattner
bc1dbfce62 ifdef out some dead code. 
Fix PR1244 and Transforms/InstCombine/2007-03-13-CompareMerge.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35082 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-13 14:27:42 +00:00
Zhou Sheng
b277b16593 For expression like 
"APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth)",
to handle ShiftAmt == BitWidth situation, use zextOrCopy() instead of
zext().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35080 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-13 06:40:59 +00:00
Zhou Sheng
771dbf7677 In APInt version ComputeMaskedBits(): 
1. Ensure VTy, KnownOne and KnownZero have same bitwidth.
  2. Make code more efficient.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35078 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-13 02:23:10 +00:00
Evan Cheng
5eef2d21a0 Use new TargetLowering addressing modes hooks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35072 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-12 23:27:37 +00:00
Jeff Cohen
c4558fde76 Unbreak VC++ build. Do not use identifiers starting with _ as they are reserved and 
can collide with system defined names.  Windows defines _BB, for example.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35066 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-12 17:56:27 +00:00
Reid Spencer
8cb6834ccf Add an APInt version of SimplifyDemandedBits. 
Patch by Zhou Sheng.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35064 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-12 17:25:59 +00:00
Reid Spencer
6b79e2d202 Add an APInt version of ShrinkDemandedConstant. 
Patch by Zhou Sheng.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35063 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-12 17:15:10 +00:00
Zhou Sheng
edd089c86a Avoid to assert on "(KnownZero & KnownOne) == 0". 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35062 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-12 16:54:56 +00:00
Zhou Sheng
430f626937 In function ComputeMaskedBits(): 
1. Replace getSignedMinValue() with getSignBit() for better code readability.
  2. Replace APIntOps::shl() with operator<<= for convenience.
  3. Make APInt construction more effective.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35060 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-12 05:44:52 +00:00
Nick Lewycky
e677a0b099 Add value ranges. Currently inefficient in both execution time and 
optimization power.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35058 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-10 18:12:48 +00:00
Anton Korobeynikov
e2ff29c17c Use range tests in LowerSwitch, where possible 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35057 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-10 16:46:28 +00:00
Devang Patel
f7543fe35a Remove dead comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35053 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-09 23:41:03 +00:00
Devang Patel
a5b7dc5ef8 Avoid recursion. Use iterative algorithm for RenamePass(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35052 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-09 23:39:14 +00:00
Devang Patel
4fe26582c0 Increment iterator now because IVUseShouldUsePostIncValue may remove 
User from the list of I users.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35051 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-09 21:19:53 +00:00
Zhou Sheng
a47f60bfaf Fix a bug in function ComputeMaskedBits(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35027 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-08 15:15:18 +00:00
Chris Lattner
97f9df1cd1 This appears correct, enable it so we can see perf changes on testers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35024 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-08 07:03:55 +00:00