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Author SHA1 Message Date
Chris Lattner
6bf77500c6 Teach jump threading to thread through blocks like: 
br (and X, phi(Y, Z, false)), label L1, label L2

This triggers once on 252.eon and 6 times on 176.gcc.  Blocks 
in question often look like this:

bb262:		; preds = %bb261, %bb248
	%iftmp.251.0 = phi i1 [ true, %bb261 ], [ false, %bb248 ]		; <i1> [#uses=4]
	%tmp270 = icmp eq %struct.rtx_def* %tmp.0.i, null		; <i1> [#uses=1]
	%bothcond = or i1 %iftmp.251.0, %tmp270		; <i1> [#uses=1]
	br i1 %bothcond, label %bb288, label %bb273

In this case, it is clear that it doesn't matter if tmp.0.i is null when coming from bb261.  When coming from bb248, it is all that matters.


Another random example:

check_asm_operands.exit:		; preds = %check_asm_operands.exit.thr_comm, %bb30.i, %bb12.i, %bb6.i413
	%tmp.0.i420 = phi i1 [ true, %bb6.i413 ], [ true, %bb12.i ], [ true, %bb30.i ], [ false, %check_asm_operands.exit.thr_comm ; <i1> [#uses=1]
	call void @llvm.stackrestore( i8* %savedstack ) nounwind 
	%tmp4389 = icmp eq i32 %added_sets_1.0, 0		; <i1> [#uses=1]
	%tmp4394 = icmp eq i32 %added_sets_2.0, 0		; <i1> [#uses=1]
	%bothcond80 = and i1 %tmp4389, %tmp4394		; <i1> [#uses=1]
	%bothcond81 = and i1 %bothcond80, %tmp.0.i420		; <i1> [#uses=1]
	br i1 %bothcond81, label %bb4398, label %bb4397

Here is the case from 252.eon:

bb290.i.i:		; preds = %bb23.i57.i.i, %bb8.i39.i.i, %bb100.i.i, %bb100.i.i, %bb85.i.i110
	%myEOF.1.i.i = phi i1 [ true, %bb100.i.i ], [ true, %bb100.i.i ], [ true, %bb85.i.i110 ], [ true, %bb8.i39.i.i ], [ false, %bb23.i57.i.i ]		; <i1> [#uses=2]
	%i.4.i.i = phi i32 [ %i.1.i.i, %bb85.i.i110 ], [ %i.0.i.i, %bb100.i.i ], [ %i.0.i.i, %bb100.i.i ], [ %i.3.i.i, %bb8.i39.i.i ], [ %i.3.i.i, %bb23.i57.i.i ]		; <i32> [#uses=3]
	%tmp292.i.i = load i8* %tmp16.i.i100, align 1		; <i8> [#uses=1]
	%tmp293.not.i.i = icmp ne i8 %tmp292.i.i, 0		; <i1> [#uses=1]
	%bothcond.i.i = and i1 %tmp293.not.i.i, %myEOF.1.i.i		; <i1> [#uses=1]
	br i1 %bothcond.i.i, label %bb202.i.i, label %bb301.i.i
  Factoring out 3 common predecessors.

On the path from any blocks other than bb23.i57.i.i, the load and compare 
are dead.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50096 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 07:05:46 +00:00
Chris Lattner
d38c14e6ed refactor some code, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50094 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 06:36:15 +00:00
Chris Lattner
9d4b94d3e1 remove dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50080 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 03:21:48 +00:00
Chris Lattner
10c0d9179e optimize "p != gep p, ..." better. This allows us to compile 
getelementptr-seteq.ll into:

define i1 @test(i64 %X, %S* %P) {
	%C = icmp eq i64 %X, -1		; <i1> [#uses=1]
	ret i1 %C
}

instead of:

define i1 @test(i64 %X, %S* %P) {
	%A.idx.mask = and i64 %X, 4611686018427387903		; <i64> [#uses=1]
	%C = icmp eq i64 %A.idx.mask, 4611686018427387903		; <i1> [#uses=1]
	ret i1 %C
}

And fixes the second half of PR2235.  This speeds up the insertion sort
case by 45%, from 1.12s to 0.77s.  In practice, this will significantly
speed up for loops structured like:

for (double *P = Base + N; P != Base; --P)
  ...

Which happens frequently for C++ iterators.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50079 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 02:53:33 +00:00
Chris Lattner
eb411291fa more fallout from Nicholas' asmprinter patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50078 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-22 02:45:44 +00:00
Dan Gohman
61a9213440 Implement an x86-64 ABI detail of passing structs by hidden first 
argument. The x86-64 ABI requires the incoming value of %rdi to
be copied to %rax on exit from a function that is returning a
large C struct.

Also, add a README-X86-64 entry detailing the missed optimization
opportunity and proposing an alternative approach.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50075 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 23:59:07 +00:00
Dan Gohman
639cdc210b Fix an out-of-bounds access in -view-sunit-dags in the case of an 
empty ScheduleDAG.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50054 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 20:07:30 +00:00
Dan Gohman
0416b0a26d Fix the encoding of the MMX movd that moves from MMX to 64-bit GPR. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50053 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 19:52:29 +00:00
Dan Gohman
92c7b65c91 Fix the way AliasSet::print prints "may alias". 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50051 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 19:48:48 +00:00
Chris Lattner
037c781de7 fix grammar-o, thanks to Duncan for noticing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50047 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 18:25:01 +00:00
Owen Anderson
4bda6e47e9 Remove unneeded #include's. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50035 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 07:47:38 +00:00
Owen Anderson
a8bd65835b Refactor memcpyopt based on Chris' suggestions. Consolidate several functions 
and simplify code that was fallout from the separation of memcpyopt and gvn.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50034 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 07:45:10 +00:00
Duncan Sands
e47d98200e Fix a "large integer implicitly truncated to unsigned type" 
warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50033 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 07:35:28 +00:00
Chris Lattner
ea705199af don't print dominators every time it is computed with -debug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50032 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 06:19:02 +00:00
Chris Lattner
a1b5858fda another bug introduced in r47802 by nicholas, for no apparent reason. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50031 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 06:12:55 +00:00
Chris Lattner
7d717a0b70 Add an ugly note. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50029 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 04:46:30 +00:00
Chris Lattner
96c5b2f8c7 fix a bug introduced by Nicholas' "unwinds to" stuff: we 
lost newlines between blocks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50024 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 04:20:33 +00:00
Chris Lattner
281def9456 don't assume that the argument passed to fprintf("%s" is a string. This 
fixes a crash in opt on 433.milc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50023 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 03:18:33 +00:00
Chris Lattner
2cc675180b Use the new SplitBlockPredecessors to implement a todo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50022 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 02:57:57 +00:00
Chris Lattner
54b9c3ba2a Move SplitBlockPredecessors out of loopsimplify into BasicBlockUtils.h 
as a global helper function.  At the same type, switch it from taking
a vector of predecessors to an arbitrary sequential input.  This allows
us to switch LoopSimplify to use a SmallVector for various temporary
vectors that it passed into SplitBlockPredecessors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50020 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 01:28:02 +00:00
Chris Lattner
1b58678d54 Move domtree/frontier updating earlier, allowing us to use it to update phi 
nodes, removing a hack.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50019 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 01:05:08 +00:00
Chris Lattner
b85979434d Factor dominator tree and frontier updating into SplitBlockPredecessors 
instead of doing it after every call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50018 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 00:54:38 +00:00
Chris Lattner
48a80b07bd fit some more code in 80 cols. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50016 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 00:25:49 +00:00
Chris Lattner
34093a634a simplify code, fit in 80 cols. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50015 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 00:23:14 +00:00
Chris Lattner
862f27ebab fit in 80 cols 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50014 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-21 00:19:16 +00:00
Nicolas Geoffray
580631a73a Be pessimistic in computing the buffer size when aligning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50008 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 23:39:44 +00:00
Nicolas Geoffray
546e36a2c1 Don't forget to update the current operand when getting the size of an instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50007 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 23:36:47 +00:00
Chris Lattner
bd3401fa98 finish the first cut of a jump threading pass implementation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50006 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 22:39:42 +00:00
Chris Lattner
0cfe85be0b replace a slow and verbose version of Instruction::isUsedOutsideOfBlock with 
a call to Instruction::isUsedOutsideOfBlock.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50005 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 22:18:22 +00:00
Chris Lattner
7ae40e7d8a add a handy helper method to instruction, useful for determining 
whether it is used outside of some block.  This can be used to see
if there are any non-local references, for example.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50004 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 22:11:30 +00:00
Chris Lattner
f9065a904f we can only thread blocks when there is a pred we can determine the succ of. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50003 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 21:18:09 +00:00
Chris Lattner
177480b7ed improve comments, infrastructure, and add some validity checks for threading. 
Add a cost function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50002 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 21:13:06 +00:00
Chris Lattner
8383a7b7a6 Add a new Jump Threading pass, which will handle cases 
such as those in PR2235.  Right now the pass is not very
effective. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50000 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 20:35:01 +00:00
Chris Lattner
3e5d1d8d08 hopefully resolve PR2240 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49999 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 19:59:12 +00:00
Chris Lattner
0e4b6c7551 rearrange some code, simplify handling of shifts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49995 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 18:24:14 +00:00
Dale Johannesen
9dd2ce46c5 Check we aren't trying to convert PPC long double. 
This fixes the testsuite failure on ppcf128-4.ll.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49994 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 18:23:46 +00:00
Nicolas Geoffray
5913e6c5db Cosmetic changes, as suggested by Evan. No functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49993 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 17:44:19 +00:00
Dale Johannesen
a0c8fc6f28 (re)fix handling of UGT. Pointed out by Nick Lewycky. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49991 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 16:58:57 +00:00
Torok Edwin
3eaee31393 g++-4.3 build-fix: CHAR_BIT requires <climits>. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49989 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 08:33:11 +00:00
Nicolas Geoffray
fd7d99120b Do not hold the JIT lock when materializing a function and verify if the 
function has already been codegen'd. This is required by the Java class loading
mechanism which executes Java code when materializing a function.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49988 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 08:33:02 +00:00
Chris Lattner
bd381a777b A better fix for my previous patch, MOVZQI2PQIrr just requires SSE2. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49986 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 05:52:46 +00:00
Dale Johannesen
79f82f9fd5 Check that APFloat::convert is not trying to target 
ppc long double, which doesn't work.

This may break some stuff temporarily, but I want to
avoid the propagation of code that assumes this works.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49983 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 01:34:03 +00:00
Chris Lattner
d8eb63fc72 regenerate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49978 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 00:41:19 +00:00
Chris Lattner
02a260aa11 Switch to using Simplified ConstantFP::get API. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49977 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 00:41:09 +00:00
Chris Lattner
eb9c8e1e3f Use simplified ConstantFP::get method, fix a bug handling frem x, 0 with long doubles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49976 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 00:26:06 +00:00
Chris Lattner
d881ad2c57 Implement PR2206. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49967 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 22:17:26 +00:00
Chris Lattner
1c14c29746 refactor handling of symbolic constant folding, picking up 
a few new cases( see Integer/a1.ll), but not anything that
would happen in practice.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49965 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 21:58:19 +00:00
Chris Lattner
61783d7322 indentation fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49964 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 21:13:00 +00:00
Chris Lattner
bcd203cf86 Allow argpromote to promote struct arguments with a specified number 
of elements.  Patch by Matthijs Kooijman!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49962 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 19:50:01 +00:00
Evan Cheng
8608f2eff2 64-bit atomic operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49949 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 02:30:38 +00:00
Evan Cheng
94d7b02c5a Also LXCHG64 -> XCHG64rm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49948 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 02:05:42 +00:00
Evan Cheng
54fc97dcdc PPC32 atomic operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49947 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 01:30:48 +00:00
Evan Cheng
bb6939dcff xchg which references a memory operand does not need to lock prefix. Atomicity is guaranteed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49946 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 01:20:30 +00:00
Dan Gohman
f4423b1e45 Teach llvm-as to accept function types with multiple return types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49945 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 00:24:39 +00:00
Dale Johannesen
cf363181c1 Fix a scalar evolution bug. Reversing everything 
does not work because of 0; 2>0 but -2U is also >0.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49928 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 21:38:31 +00:00
Nicolas Geoffray
dc17ab2bf0 Enable jitting with a known memory size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49924 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:59:31 +00:00
Duncan Sands
37bcda3de9 Implement a bit more softfloat support in 
LegalizeTypes.  Correct the load logic so
that it actually works, and also teach it
to handle floating point extending loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49923 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:56:03 +00:00
Dan Gohman
28269139ee Fix the handling of va_copy on x86-64. As of llvm-gcc r49920 
llvm-gcc is now lowering va_copy on x86-64, so this completes
the fix for PR2230.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49922 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:55:41 +00:00
Evan Cheng
7e03280b53 - Fix atomic operation JIT encoding. 
- Remove unused instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49921 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:55:36 +00:00
Duncan Sands
4cc0456456 Add some more FIXME's for indexed loads and stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49916 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:27:12 +00:00
Duncan Sands
41edfb8ae1 Provide an explicit list of operands to MakeLibcall, 
rather than having it suck them out of a node.  Add
a bunch of new libcalls, and remove dead softfloat
code (dead, because FloatToInt is used not Expand
in this case).  Note that indexed stores probably
aren't handled properly, likewise for loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49915 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 20:25:14 +00:00
Evan Cheng
a8f720d695 Correct comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49913 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 19:25:26 +00:00
Evan Cheng
883d260045 Not safe to "kill" a register if its live range extends pass the end of block branch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49911 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-18 19:22:23 +00:00
Evan Cheng
3f73beaeb2 Also support Intel asm syntax. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49878 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 23:35:10 +00:00
Dan Gohman
35b31bea0d Remove the implicit conversion from SDOperandPtr to SDOperand*; this 
may fix a build error on Visual Studio.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49876 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 23:02:12 +00:00
Evan Cheng
9d1a81a23c Fix assembly code for atomic operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49869 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 21:26:35 +00:00
Evan Cheng
639f493ebf Be more careful with insert_subreg and extract_subreg where either source or destination operand has already been coalesced with another register that's defined by a insert_subreg or extract_subreg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49843 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 07:58:04 +00:00
Owen Anderson
241f65321e Make GVN able to remove unnecessary calls to read-only functions again. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49842 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 05:36:50 +00:00
Bill Wendling
f231778269 Use correct name for method in comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49841 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 05:20:39 +00:00
Dan Gohman
499c1bd358 Correct the SrcValue information in the Expand code for va_copy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49839 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 02:09:26 +00:00
Scott Michel
5788bca1c2 Remove unused variable 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49838 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 01:30:44 +00:00
Evan Cheng
621d157676 Fix a sub-register indice propagation bug. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49832 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-17 00:06:42 +00:00
Scott Michel
4bf393a13e Workaround for PR2207, in which pred_iterator assert gets triggered due to a 
wee problem in Xcode 2.[45]/gcc 4.0.1.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49831 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 23:46:39 +00:00
Evan Cheng
03eb38848c Don't forget about sub-register indices when rematting instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49830 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 23:44:44 +00:00
Dale Johannesen
5e8fb81353 Unbreak build on x86-64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49822 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 22:24:33 +00:00
Nicolas Geoffray
51cc3c13ea Correlate stubs with functions in JIT: when emitting a stub, the JIT tells the memory manager which function 
the stub will resolve.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49814 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 20:46:05 +00:00
Evan Cheng
9c1e06e187 After reading memory that's already freed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49810 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 20:24:25 +00:00
Nicolas Geoffray
52e724ad7e Infrastructure for getting the machine code size of a function and an instruction. X86, PowerPC and ARM are implemented 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49809 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 20:10:13 +00:00
Evan Cheng
dc00858e11 Initialize X863DNowLevel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49808 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 19:03:02 +00:00
Evan Cheng
ff7a3e557e Fix PR2226. Avoid using uninitialized variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49807 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 18:48:43 +00:00
Evan Cheng
76249966ee Empty basic block should have an empty range. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49800 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 18:01:08 +00:00
Dale Johannesen
48325f4b08 Don't read off end of the input array. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49799 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 17:31:41 +00:00
Roman Levenstein
9cac5259fe Ongoing work on improving the instruction selection infrastructure: 
Rename SDOperandImpl back to SDOperand.
Introduce the SDUse class that represents a use of the SDNode referred by
an SDOperand. Now it is more similar to Use/Value classes.

Patch is approved by Dan Gohman.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49795 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 16:15:27 +00:00
Evan Cheng
0d4bdde327 Rewrite LiveVariable liveness computation. The new implementation is much simplified. It eliminated the nasty recursive routines and removed the partial def / use bookkeeping. There is also potential for performance improvement by replacing the conservative handling of partial physical register definitions. The code is currently disabled until live interval analysis is taught of the name scheme. 
This patch also fixed a couple of nasty corner cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49784 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 09:46:40 +00:00
Evan Cheng
9b6d7b9fb3 Code clean up. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49783 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 09:41:59 +00:00
Owen Anderson
1f23e16319 Major repairs to the post-dominators implementation. Patch from Florian Brandner! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49768 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 04:21:16 +00:00
Dan Gohman
171c11ec93 Add support for the form of the SSE41 extractps instruction that 
puts its result in a 32-bit GPR.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49762 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 02:32:24 +00:00
Dan Gohman
bcda285fcc Recreate the size SDNode instead of reusing the old one in the x86 
memcpy lowering code; this ensures that the size node has the desired
result type. This fixes a regression from r49572 with @llvm.memcpy.i64
on x86-32.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49761 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 01:32:32 +00:00
Evan Cheng
d94950c473 Avoid read after free. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49760 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 01:22:28 +00:00
Dan Gohman
302cd54299 Remove X86_64SRet; it isn't used anymore. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49759 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-16 00:24:30 +00:00
Dan Gohman
a630f4ed91 Add movd instructions to move from MMX registers 
to 64-bit GPR registers on x86-64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49757 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-15 23:55:07 +00:00
Dan Gohman
5a2d335c4c Fix the new scheduler assertion checks to work when 
the scheduler has inserted no-ops. This fixes
the 2006-07-03-schedulers.ll regression on ppc32.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49747 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-15 22:40:14 +00:00
Chuck Rose III
cc51c31953 VisualStudio project files updated. #include <algorithm> added to make VisualStudio happy. Also had to undefine setjmp because of #include <csetjmp> turning setjmp into _setjmp in VisualStudio. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49743 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-15 21:27:11 +00:00
Dale Johannesen
21d31a8d94 Don't assume a tail call can't reference a byval 
argument to the outer function, this isn't correct.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49731 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-15 17:41:34 +00:00
Dan Gohman
b11af0db2e Use gv's --spartan option, which trades away an extra row of UI buttons 
for more space for displaying the graph.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49730 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-15 17:27:05 +00:00
Nicolas Geoffray
6ccbbd8990 Change Divided flag to Split, as suggested by Evan 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49715 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-15 08:08:50 +00:00
Dan Gohman
80792f3dde Treat EntryToken nodes as "passive" so that they aren't added to the 
ScheduleDAG; they don't correspond to any actual instructions so they
don't need to be scheduled.

This fixes a bug where the EntryToken was being scheduled multiple
times in some cases, though it ended up not causing any trouble because 
EntryToken doesn't expand into anything. With this fixed the schedulers
reliably schedule the expected number of units, so we can check this
with an assertion.

This requires a tweak to test/CodeGen/X86/loop-hoist.ll because it
ends up getting scheduled differently in a trivial way, though it was
enough to fool the prcontext+grep that the test does.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49701 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-15 01:22:18 +00:00
Dan Gohman
89bf0a6b05 In -view-sunit-dags, display "special" chain dependencies as cyan 
instead of blue to distinguish them from regular dependencies.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49696 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 23:15:07 +00:00
Dan Gohman
0a9371de6d Remove unnecessary <sstream> includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49681 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 20:40:47 +00:00
Dan Gohman
b91c89dfb9 Avoid creating MERGE_VALUES nodes for single values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49676 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 18:43:25 +00:00
Dan Gohman
235fc57ef2 Teach AliasSetTracker about VAArgInst. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49674 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 18:34:50 +00:00
Dan Gohman
4a9a3e5374 Minor whitespace and comment cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49671 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 18:26:16 +00:00
Dan Gohman
f7b37b2d0e In the special case, call the comparison function instead of 
manually performing the comparison. This allows the special
case to work correctly even in the case where someone is
experimenting with a different comparison function :-).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49670 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 18:23:56 +00:00
Dan Gohman
29e4bdbf27 Fix const-correctness issues with the SrcValue handling in the 
memory intrinsic expansion code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49666 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 17:55:48 +00:00
Dale Johannesen
3541af73b6 Reverse sense of unwind-tables option. This means 
stack tracebacks on Darwin x86-64 won't work by default;
nevertheless, everybody but me thinks this is a good idea.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49663 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 17:54:17 +00:00
Owen Anderson
6bc41e8a74 Revert r49614. As Dan pointed out, some of these aren't correct. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49657 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 17:38:21 +00:00
Nicolas Geoffray
9701c8a18f Fix /test/CodeGen/PowerPC/big-endian-actual-args.ll for linux/ppc32 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49652 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 17:17:14 +00:00
Dan Gohman
d660f973dc VAArg may trap. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49646 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 15:07:08 +00:00
Duncan Sands
ddc016cc85 Initial libcall support for LegalizeTypes. This is 
much simpler than in LegalizeDAG because calls are
not yet expanded into call sequences: that happens
after type legalization has finished.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49634 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-14 06:48:48 +00:00
Chris Lattner
75caee2419 add a new CallGraphNode::removeCallEdgeFor method, tidy some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49617 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-13 19:41:25 +00:00
Owen Anderson
386ea355e7 Replace calls of the form V1->setName(V2->getName()) with V1->takeName(V2), 
which is significantly more efficient.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49614 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-13 19:15:17 +00:00
Duncan Sands
4a6da60787 LegalizeTypes can sometimes have deleted nodes 
in its maps.  Add some sanity checks that catch
this kind of thing.  Hopefully these can be
removed one day (once all problems are fixed!)
but for the moment it seems wise to have them in.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49612 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-13 16:04:03 +00:00
Nicolas Geoffray
c0cb28fd3a Add a divided flag for the first piece of an argument divided into mulitple parts. Fixes PR1643 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49611 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-13 13:40:22 +00:00
Chris Lattner
3b37448904 Fix some serious logic errors that broke the jit on darwin/x86-64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49606 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-13 07:04:56 +00:00
Duncan Sands
89f6d88db3 Merge LLVMBuilder and FoldingBuilder, calling 
the result IRBuilder.  Patch by Dominic Hamon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49604 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-13 06:22:09 +00:00
Chris Lattner
86941611c9 Gabor points out that reserveOperandSpace takes # of values, 
not # of operands as an input.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49599 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-13 00:14:42 +00:00
Anton Korobeynikov
78c80fdbdd Provide option for stack alignment override 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49593 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-12 22:12:22 +00:00
Arnold Schwaighofer
4b5324ad2c This patch corrects the handling of byval arguments for tailcall 
optimized x86-64 (and x86) calls so that they work (... at least for
my test cases).

Should fix the following problems:

Problem 1: When i introduced the optimized handling of arguments for
tail called functions (using a sequence of copyto/copyfrom virtual
registers instead of always lowering to top of the stack) i did not
handle byval arguments correctly e.g they did not work at all :).

Problem 2: On x86-64 after the arguments of the tail called function
are moved to their registers (which include ESI/RSI etc), tail call
optimization performs byval lowering which causes xSI,xDI, xCX
registers to be overwritten. This is handled in this patch by moving
the arguments to virtual registers first and after the byval lowering
the arguments are moved from those virtual registers back to
RSI/RDI/RCX.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49584 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-12 18:11:06 +00:00
Duncan Sands
460a14e09c Factor some libcall code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49583 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-12 17:14:18 +00:00
Dan Gohman
707e018423 Drop ISD::MEMSET, ISD::MEMMOVE, and ISD::MEMCPY, which are not Legal 
on any current target and aren't optimized in DAGCombiner. Instead
of using intermediate nodes, expand the operations, choosing between
simple loads/stores, target-specific code, and library calls,
immediately.

Previously, the code to emit optimized code for these operations
was only used at initial SelectionDAG construction time; now it is
used at all times. This fixes some cases where rep;movs was being
used for small copies where simple loads/stores would be better.

This also cleans up code that checks for alignments less than 4;
let the targets make that decision instead of doing it in
target-independent code. This allows x86 to use rep;movs in
low-alignment cases.

Also, this fixes a bug that resulted in the use of rep;stos for
memsets of 0 with non-constant memory size when the alignment was
at least 4. It's better to use the library in this case, which
can be significantly faster when the size is large.

This also preserves more SourceValue information when memory
intrinsics are lowered into simple loads/stores.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49572 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-12 04:36:06 +00:00
Dan Gohman
6f836adafe Fix a bug that prevented x86-64 from using rep.movsq for 
8-byte-aligned data.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49571 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-12 02:35:39 +00:00
Nate Begeman
6795ebb663 80 col fix 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49569 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-12 00:47:57 +00:00
Nate Begeman
e956398cf1 Restore code to disable crash catcher on older OS X systems 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49568 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-12 00:47:46 +00:00
Evan Cheng
97b8c40d09 Add debugging code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49566 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-12 00:22:01 +00:00
Chris Lattner
6098e4be94 Reenable JIT symbol table. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49548 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-11 18:11:56 +00:00
Evan Cheng
f2b24ca2c7 Do not add empty live intervals to handled_. They should never be undone for backtracking. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49544 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-11 17:55:47 +00:00
Evan Cheng
f870fbc554 If a PHI node has a single implicit_def source, replace it with an implicit_def instead of a copy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49543 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-11 17:54:45 +00:00
Evan Cheng
4cce6b4c78 Use of implicit_def is not part of live interval. Create empty intervals for the uses when the live interval is being spilled. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49542 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-11 17:53:36 +00:00
Gabor Greif
78256a199e detabify 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49524 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-11 09:34:57 +00:00
Owen Anderson
8f46c78fcc Fix PR2213 by simultaneously making GVN more aggressive with the return values 
of calls and less aggressive with non-readnone calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49516 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-11 05:11:49 +00:00
Evan Cheng
d2012d0c4b Remove implicit_def instructions that become dead as result of coalescing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49513 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 23:48:35 +00:00
Evan Cheng
5d3600f576 Allow registers defined by implicit_def to be clobbered. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49512 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 23:47:53 +00:00
Dan Gohman
c04575f494 Fix a typo in a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49504 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 23:02:38 +00:00
Owen Anderson
f062f10231 Fix for PR2190. Memdep's non-local caching was checking dirtied blocks in the 
wrong order.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49499 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 22:13:32 +00:00
Dan Gohman
3bd659ba20 Make several symbols static. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49496 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 21:11:47 +00:00
Dan Gohman
eee962e1ce Teach InstCombine's ComputeMaskedBits to handle pointer expressions 
in addition to integer expressions. Rewrite GetOrEnforceKnownAlignment
as a ComputeMaskedBits problem, moving all of its special alignment
knowledge to ComputeMaskedBits as low-zero-bits knowledge.

Also, teach ComputeMaskedBits a few basic things about Mul and PHI
instructions.

This improves ComputeMaskedBits-based simplifications in a few cases,
but more noticeably it significantly improves instcombine's alignment
detection for loads, stores, and memory intrinsics.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49492 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 18:43:06 +00:00
Evan Cheng
172b70c62a A copy instruction may use a register multiple times on some targets. Change them all. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49491 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 18:38:47 +00:00
Evan Cheng
f0785153e5 Add comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49469 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 08:03:14 +00:00
Chris Lattner
2189c17443 add a note, this is actually not too bad to implement. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49466 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 05:54:50 +00:00
Chris Lattner
a825d75f1d move the x86-32 part of PR2108 here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49465 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 05:37:47 +00:00
Chris Lattner
db66750753 Fix the x86-64 side of PR2108 by adding a v2f64 version of 
MOVZQI2PQIrr.  This would be better handled as a dag combine 
(with the goal of eliminating the bitconvert) but I don't know
how to do that safely.  Thoughts welcome.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49463 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 05:13:43 +00:00
Evan Cheng
80b09fe8bc Teach branch folding pass about implicit_def instructions. Unfortunately we can't just eliminate them since register scavenger expects every register use to be defined. However, we can delete them when there are no intra-block uses. Carefully removing some implicit def's which enable more blocks to be optimized away. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49461 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 02:32:10 +00:00
Chris Lattner
0c1963099f Disable an xform we've had for a long time, pow(x,0.5) -> sqrt. 
This is not safe for all inputs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49458 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-10 02:07:51 +00:00
Evan Cheng
7e073baedb - More aggressively coalescing away copies whose source is defined by an implicit_def. 
- Added insert_subreg coalescing support.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49448 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 20:57:25 +00:00
Dan Gohman
7d8143f0ef Make isVectorClearMaskLegal's operand list const. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49446 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 20:09:42 +00:00
Dan Gohman
c2ffd4b1cb Add XMM1 as a second return value register for f32 and f64 on x86-64. This 
is needed for the x86-64-ABI handling of structs that contain floating-point
members that are returned by value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49441 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 17:54:37 +00:00
Dan Gohman
719e64e8c1 Add DX as a second return value register for i16 on x86. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49440 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 17:53:38 +00:00
Chris Lattner
cc7f168c6c Generalize getUnaryFloatFunction to handle any FP unary function, automatically 
figuring out the suffix to use.  implement pow(2,x) -> exp2(x).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49437 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 17:48:11 +00:00
Chris Lattner
8bb9a4f28f use the new ConstantFP::get method to make this work with 
long double and simplify the code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49435 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 17:17:35 +00:00
Devang Patel
d4e0af9f89 Be conservative if getresult operand is neither call nor invoke. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49430 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 15:58:24 +00:00
Owen Anderson
a723d1e48f Factor a bunch of functionality related to memcpy and memset transforms out of 
GVN and into its own pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49419 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 08:23:16 +00:00
Owen Anderson
82a66291b0 Remove accidentally duplicated code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49418 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 07:55:01 +00:00
Chris Lattner
288e78fbe7 add a simplified accessor for creating an fp constant of a 
particular value but variable type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49416 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 06:38:30 +00:00
Evan Cheng
f20d943bc6 Missed a hasInterval check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49415 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 01:30:15 +00:00
Chris Lattner
4592230265 add a version of ConstantFP::get that doesn't take a redundant Type* value, 
start migrating code over to use it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49413 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 00:45:01 +00:00
Chris Lattner
77d00b0cea many cleanups to the pow optimizer. Allow it to handle powf, 
add support for  pow(x, 2.0) -> x*x.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49411 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-09 00:07:45 +00:00
Dale Johannesen
e8277dc7d6 Rename -disable-required-unwind-tables to unwind-tables-optional. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49389 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-08 18:07:49 +00:00
Duncan Sands
92432a8db1 Convenience method for setting the nounwind 
attribute for a function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49373 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-08 07:23:58 +00:00
Devang Patel
34437f35e9 Fix insert point handling for multiple return values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49367 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-08 02:24:08 +00:00
Dale Johannesen
f2247cfb38 Handle the situation in 2008-01-25-EmptyFunction.ll 
correctly when unwind info is being generated.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49366 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-08 00:37:56 +00:00
Dale Johannesen
4e1b79459f Implement new llc flag -disable-required-unwind-tables. 
Corresponds to -fno-unwind-tables (usually default in gcc).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49361 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-08 00:10:24 +00:00
Ted Kremenek
9b01cc0ede Make getDirnameSep a static method (not part of Path's interface). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49354 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 22:01:32 +00:00
Ted Kremenek
cf55c8e221 Added method Path::getDirname(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49352 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 21:53:57 +00:00
Dan Gohman
36b5c1338a Rename MemOperand to MachineMemOperand. This was suggested by 
review feedback from Chris quite a while ago. No functionality
change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49348 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 19:35:22 +00:00
Owen Anderson
412821284f Add operator= implementations to SparseBitVector, allowing it to be used in GVN. This results 
in both time and memory savings for GVN.  For example, one testcase went from 10.5s to 6s with
this patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49345 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 17:38:23 +00:00
Daniel Berlin
a2ce2e3dd9 Fix PR 2169. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49339 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 14:20:50 +00:00
Duncan Sands
e2c4304654 Use Intrinsic::getDeclaration in more places. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49338 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 13:45:04 +00:00
Duncan Sands
3d292aca03 The "stacksave is not nounwind problem" no longer 
needs to be fixed here - a previous commit made sure
that intrinsics always get the right attributes.
So remove no-longer needed code, and while there use
Intrinsic::getDeclaration rather than getOrInsertFunction. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49337 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 13:43:58 +00:00
Duncan Sands
a122043c2c Use Intrinsic::getDeclaration to get hold of 
intrinsics.  Fix up the argument type (should
be i8*, was an array*).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49336 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 13:41:19 +00:00
Duncan Sands
79ab3e8014 Make sure that intrinsics automagically get the 
right parameter attributes no matter how they
are obtained.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49335 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 13:39:11 +00:00
Roman Levenstein
dc1adac582 Re-commit of the r48822, where the infinite looping problem discovered 
by Dan Gohman is fixed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49330 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 10:06:32 +00:00
Owen Anderson
e5ffa900f8 Make GVN more memory efficient, particularly on code that contains a large number of 
allocations, which GVN can't optimize anyways.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49329 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 09:59:07 +00:00
Dale Johannesen
11b80a8e1c Mark calls to llvm.stacksave, llvm.stackrestore as 
nounwind.  When such calls are inlined into something
else that is invoked, they were getting changed to invokes,
which is badness.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49299 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-07 00:08:48 +00:00
Gabor Greif
e64d248b63 regenerate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49293 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 23:07:54 +00:00
Chris Lattner
aee7f21c47 fix warnings with assertions disabled. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49285 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 21:50:58 +00:00
Chris Lattner
409a3d0837 Silence warning when no assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49284 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 21:46:45 +00:00
Chris Lattner
0c80c75783 silence a warning when assertions are disabled. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49283 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 21:44:08 +00:00
Gabor Greif
c024cbca22 fix a warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49282 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 21:42:13 +00:00
Torok Edwin
4fea2e982d Prefer to expand mask for xor to -1, so we have a chance to turn it into a not. 
If it cannot be expanded, it will keep the old behaviour and try to shrink the constant.
Part of enhancement for PR2191.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49280 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 21:23:02 +00:00
Gabor Greif
051a950000 API changes for class Use size reduction, wave 1. 
Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49277 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-06 20:25:17 +00:00
Chris Lattner
e52419147a disable this for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49248 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-05 04:12:01 +00:00
Evan Cheng
1dc7869025 1. IMPLICIT_DEF can *re-define* any register. 
2. Coalescer can now create an interesting situation where a register def can
   reaches itself without being killed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49246 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-05 01:27:09 +00:00
Evan Cheng
0c0f83ff5d Favors pshufd over shufps when shuffling elements from one vector. pshufd is faster than shufps. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49244 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-05 00:30:36 +00:00
Dale Johannesen
a4091d34f3 Make sure both PendingLoads and PendingExports are flushed 
before an invoke.  Failure to do this causes references in
the landing pad to variables that were not set.  Fixes
g++.dg/eh/delayslot1.C
g++.dg/eh/fp-regs.C
g++.old-deja/g++.brendan/eh1.C



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49243 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 23:48:31 +00:00
Torok Edwin
3e3dc57d3f strdup needs <cstring>. This fixes a build error with g++-4.3. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49218 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 16:08:00 +00:00
Chris Lattner
8ac66c122b Provide an initial cut at exposing JIT compiled symbols to performance 
tools.  This is currently only enabled on the mac, but could easily be
supported by other hosts that are interested.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49207 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 05:51:42 +00:00
Chris Lattner
f4cc3096fd Make ExecutionEngine::updateGlobalMapping return the old mapping. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49206 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 04:47:41 +00:00
Evan Cheng
fc5423d561 Undo PHI elimination copy placement patch. This causes coalescing (performace) issues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49198 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 01:20:05 +00:00
Evan Cheng
e04f736545 This is done. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49197 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-04 01:19:03 +00:00
Andrew Lenharth
51dd8c9224 if some functions don't have debug info, we were outputing the same label at the start of each of those functions. This makes assemblers unhappy 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49176 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 17:37:43 +00:00
Evan Cheng
db9b1c3329 - Turn copies of implicit_def into implicit_def instructions. 
- Be smarter about coalescing copies from implicit_def.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49168 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:41:54 +00:00
Evan Cheng
f30a49d9e0 Special handling of zero-sized live intervals. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49167 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:40:27 +00:00
Evan Cheng
419852ca8a - Treat a live range defined by an implicit_def as a zero-sized one. 
- Eliminate an implicit_def when it's being spilled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49166 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:39:43 +00:00
Evan Cheng
576a27043d - PHI elimination also eliminates implicit_def that fits into a PHI node rather than copying it. 
- Be (slightly) smarter about where to place the copies.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49165 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:38:20 +00:00
Evan Cheng
8a50f1fcf0 Start of a series of patches related to implicit_def. 
There is no point in creating a long live range defined by an implicit_def. Scheduler now duplicates implicit_def instruction for each of its uses. Therefore, if an implicit_def node has multiple uses, it will become a number of very short live ranges, rather than a long one. This will make coalescer's job easier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49164 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:36:07 +00:00
Ted Kremenek
c5412c58d2 Re-implemented Path::createDirectoryOnDisk (for Unix). 
This method allows one to create a directory, and optionally create all parent
directories that do not exist.

The original implementation would require that *all* directories along a path
are writable by the user, including directories that already exist. For example,
suppose we wanted to create the directory "/tmp/foo/bar", and the directory
"/tmp" already exists, but not "/tmp/foo". Since "/tmp" is writable by all
users, the original implementation would work, and create "/tmp/foo", followed
by "/tmp/bar".

A problem occurred, however if one wanted to created the directory
"/Users/myuser/bar" (or equivalently "/home/myuser/bar"), and "/Users/myuser"
already existed and is writable by the current user. The directory
"/User/myuser" is writable by the user, but "/User" is not. The original
implementation of createDirectoryOnDisk would return with failure since "/User"
is not writable, even though "/User/mysuser" is writable.

The new implementation works by recursively creating parents as needed, and thus
doesn't need to check the permissions on every directory in a path.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49162 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 16:11:31 +00:00
Evan Cheng
43b7ca15a3 Re-enable SSE4. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49158 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 08:53:29 +00:00
Evan Cheng
ab394bdcc0 Fix x86-64 encoding bug. REX prefix must always follow 0x0F prefix. For example, extractps in 64bit mode: 66 REX 0F 3A 17, not 66 0F 3A REX 17. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49157 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 08:53:17 +00:00
Evan Cheng
90ce87b5bd Cosmetic 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49156 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 07:45:18 +00:00
Evan Cheng
b4e56d4a2b Temporarily disabling SSE4 until we fix the encoding issues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49129 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 04:49:54 +00:00
Evan Cheng
6397c64441 Backing out 48222 temporarily. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49124 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-03 03:13:16 +00:00
Dan Gohman
271515a46d Suppress the 128-bit integer typedef on 32-bit targets, because 
it causes compile errors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49122 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 23:52:49 +00:00
Dale Johannesen
dedf502fba Make EH work with unnamed functions. Reenable running 
StripSymbols when EH is on.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49110 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 20:10:52 +00:00
Dan Gohman
d761480fe4 Partial CBackend support for 128-bit integers. This is needed 
now that llvm-gcc is lowering appropriately-sized struct returns
to i128 on x86-64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49109 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 19:40:14 +00:00
David Greene
a022e3fc2f Iterators folloring a SmallVector erased element are invalidated so 
don't access cached iterators from after the erased element.

Re-apply 49056 with SmallVector support.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49106 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 18:24:46 +00:00
Evan Cheng
ea1d9cdc4e Now that I am told MachineRegisterInfo also tracks physical register uses / defs, I can do away with the horribleness I introduced a while back. It's impossible to detect if there is any use of a physical register below an instruction (and before any def of the register) with some cheap book keeping. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49105 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 18:04:08 +00:00
Evan Cheng
1088317675 Remove #include<map> from LiveVariables.h. Not referenced. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49099 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 17:23:50 +00:00
Dale Johannesen
e00406281d Cosmetic changes per EH patch review feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49096 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 17:04:45 +00:00
Anton Korobeynikov
67073f1cbd Add new CC lowering rule: provide a list of registers, which can be 'shadowed', 
when some another register is used for argument passing.
Currently is used on Win64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49079 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 05:23:57 +00:00
Owen Anderson
52b1733df4 In some situations, we need to check for local interferences between the PHI 
node and its inputs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49070 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 03:00:13 +00:00
Owen Anderson
59df878391 Correctly mark a valno that was previous defined by a PHI node as having an 
unknown defining inst after PHI elimination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49069 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 02:12:45 +00:00
Dale Johannesen
1532f3ddd7 Recommitting EH patch; this should answer most of the 
review feedback.
-enable-eh is still accepted but doesn't do anything.
EH intrinsics use Dwarf EH if the target supports that,
and are handled by LowerInvoke otherwise.
The separation of the EH table and frame move data is,
I think, logically figured out, but either one still
causes full EH info to be generated (not sure how to
split the metadata correctly).
MachineModuleInfo::needsFrameInfo is no longer used and
is removed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49064 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-02 00:25:04 +00:00
Evan Cheng
7c3becd9d7 1. Drop default inline threshold back down to 200. 
2. Do not use # of basic blocks as part of the cost computation since it doesn't really figure into function size.
3. More aggressively inline function with vector code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49061 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 23:59:29 +00:00
Tanya Lattner
48afd9f8a9 Reverting 49056 due to the build being broken. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49060 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 23:41:44 +00:00
Evan Cheng
ffe2eb0120 ReMat of load from stub in pic mode extends the life of pic base. Currently spiller doesn't do a good job of estimating the impact. Disable for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49059 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 23:26:12 +00:00
David Greene
da2903f028 Iterators folloring a SmallVector erased element are invalidated so 
don't access cached iterators from after the erased element.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49056 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 22:14:23 +00:00
Bill Wendling
a442006f48 Fix compilation errors on MSVC. Patch by Argiris Kirtzidis! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49055 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 22:09:20 +00:00
Evan Cheng
247faffb32 Remove unnecessary and non-deterministic checking code. Re-enable remat of load from gv stub. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49054 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 21:38:20 +00:00
Evan Cheng
3c75ba858b Re-materialization is for uses only. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49053 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 21:37:32 +00:00
Dan Gohman
38c92263eb Don't use __bzero for memset if the second argument isn't zero. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49050 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 20:56:18 +00:00
Dan Gohman
68d599df37 Speculatively micro-optimize memory-zeroing calls on Darwin 10. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49048 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 20:38:36 +00:00
Dale Johannesen
b6d5b14390 Revert 49006 for the moment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49046 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 20:00:57 +00:00
Owen Anderson
78216bc9f8 Don't dereference MBB->end(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49043 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 18:05:08 +00:00
Chris Lattner
038112a4e0 Change the MemoryBuffer::getFile* methods to take just a pointer to the 
start of a filename, not a filename+length.  All clients can produce a
null terminated name, and the system api's require null terminated 
strings anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49041 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 18:04:03 +00:00
Evan Cheng
78b6ce3981 Disabling remat of load from gv stub (temporarily) again to fix llvmgcc bootstrap miscompare. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49037 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 07:33:13 +00:00
Chris Lattner
14c762d82f add some #includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49036 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 06:25:23 +00:00
Chris Lattner
98b7e612b2 MappedFile is dead, remove it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49035 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 06:20:44 +00:00
Chris Lattner
9ffd19af2e Implement Path::MapInFilePages/UnMapFilePages on unix, which 
provides fast MappedFile::getFile for large files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49034 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 06:16:24 +00:00
Chris Lattner
11da4cf25c Reimplement MemoryBuffer::getFile with three enhancements: 
1) stop using MappedFile.
2) if profitable use the sys::path::MapInFilePages api to
   read the file.
3) otherwise fallback to read.

When sys::path::MapInFilePages is implemented, this provides
several benefits:

#1: this avoids fragmenting memory for small files.
#2: this avoids extraneous stat calls when the file size is known.
#3: this only keeps the file descriptor open while reading the 
    file, not for the duration of the lifetime of the memory 
    buffer.  This fixes a serious clang FD 'leak' problem.

I believe that this will work on a win32 machine, but I don't have
one to test on.  I'd appreciate it if someone could check.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49031 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 06:05:21 +00:00
Chris Lattner
799ed1053b Stub out some sys::Path::MapInFilePages/UnMapFilePages methods. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49030 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 06:00:12 +00:00
Chris Lattner
7f6b447904 change the archive stuff to use MemoryBuffer instead of mappedfile. 
MemoryBuffer is higher level and more closely matches the model
needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49029 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 04:26:46 +00:00
Chris Lattner
2fcebc5e63 rewrite SourceFile to be in terms of MemoryBuffer, not MappedFile. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49027 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 03:59:34 +00:00
Chris Lattner
23ffec8258 Make MappedFile::map return a const correct pointer, don't leak address space on Unix platforms. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49026 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 03:49:38 +00:00
Chris Lattner
37db5d67f9 Remove the MappedFile::charBase member, rename base -> getBase() and 
make getBase() return a const-correct pointer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49025 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 03:40:53 +00:00
Chris Lattner
a7750c1142 Change DiffFilesWithTolerance to be written in terms of MemoryBuffer, 
not an mmapped file.  This more closely matches its requirements and
provides an implicitly null terminated buffer, something this
routine had to emulate itself before.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49024 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 03:39:49 +00:00
Chris Lattner
bdbd2d710c Remove MappedFile support for mapping files for write and exec 
and shared.  This complicates the design, is not used, and probably
doesn't even work.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49022 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 03:10:22 +00:00
Chris Lattner
0838923afb add missing #includes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49020 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 02:58:05 +00:00
Evan Cheng
9845eb5b03 More soft fp fixes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49016 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 02:18:22 +00:00
Evan Cheng
db45d1c649 Pasto. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49014 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 02:00:09 +00:00
Evan Cheng
6ad2f930da Add comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49013 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 01:51:26 +00:00
Evan Cheng
110cf48752 Unbreak ARM / Thumb soft FP support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49012 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 01:50:16 +00:00
Dale Johannesen
2ffbcaccd1 Accept 'y' constraint (MMX) in inline asm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49011 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 00:57:48 +00:00
Chris Lattner
540630f637 cleanup the MappedFile API and comments. This removes and updates 
tons of out of date comments (really nothing throws here!) and fixes
some other fairly glaring issues: "size" used to return the size of 
the file *and* change it, depending on how you called it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49009 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 00:53:25 +00:00
Chris Lattner
328c84aa99 remove DEFINING_FILE_FOR for MappedFile.h 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49008 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-01 00:35:55 +00:00
Dale Johannesen
1544e4713b Emit exception handling info for functions which are 
not marked nounwind, or for all functions when -enable-eh
is set, provided the target supports Dwarf EH.

llvm-gcc generates nounwind in the right places; other FEs
will need to do so also.  Given such a FE, -enable-eh should
no longer be needed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49006 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 23:40:23 +00:00
Evan Cheng
427f4c106a It's not safe to fold a load from GV stub or constantpool into a two-address use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49002 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 23:19:51 +00:00
Nate Begeman
82b53cd2ba Actually disable crash reporting on Mac OS X, returning bugpoint to speedy 
crash miscompilations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49000 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 22:19:25 +00:00
Dan Gohman
6faaef57b0 Set blockBegin to point to the beginning of the block, 
not the end.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48999 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 22:08:00 +00:00
Evan Cheng
ca1267c02b Move reMaterialize() from TargetRegisterInfo to TargetInstrInfo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48995 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 20:40:39 +00:00
Dan Gohman
b061c4bc44 Fix a DAGCombiner optimization to respect volatile qualification. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48994 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 20:32:52 +00:00
Erick Tryzelaar
d6d018589c Expose Function::viewCFG and Function::viewCFGOnly to bindings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48982 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 16:22:09 +00:00
Evan Cheng
9d15abe838 Re-apply 48911. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48977 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 07:54:19 +00:00
Evan Cheng
24d2f8a212 The support for remat of instructions with a register operand is hackish, to say the least. Since the register operand guaranteed to be PIC base and that it is already live at all uses, we are making sure it will not be spilled after its uses are rematerialized for both performance and correctness reasons. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48976 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 07:53:30 +00:00
Owen Anderson
bc91bd34f1 Fix a major bug in the DFS calculation. Thanks for Christopher Lamb for pointing this out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48973 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 01:39:20 +00:00
Nate Begeman
83ad90a779 Don't eliminate bitcast instructions that change the type of a pointer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48971 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 00:22:16 +00:00
Duncan Sands
66a1a05c86 Fix comment typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48967 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-30 19:38:55 +00:00
Nick Lewycky
8dd6505868 Moved from PR1570. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48965 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-30 19:07:11 +00:00
Chris Lattner
d27c991ceb Fix "Control reaches the end of non-void function" warnings, 
patch by David Chisnall.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48963 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-30 18:22:13 +00:00
Chris Lattner
f19f58a936 minor code cleanups, allow constant folding sinf/cosf. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48961 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-30 18:02:00 +00:00
Evan Cheng
fd5da6c991 Cosmetic changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48947 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-29 18:34:22 +00:00
Chris Lattner
97ae12a988 change iterator invalidation avoidance to just move the iterator backward 
when something changes, instead of moving forward.  This allows us to 
simplify memset lowering, inserting the memset at the end of the range of 
stuff we're touching instead of at the start.

This, in turn, allows us to make use of the addressing instructions already
used in the function instead of inserting our own.  For example, we now
codegen:

	%tmp41 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 0		; <i8*> [#uses=2]
	call void @llvm.memset.i64( i8* %tmp41, i8 -1, i64 8, i32 1 )

instead of:

	%tmp20 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 7		; <i8*> [#uses=1]
	%ptroffset = getelementptr i8* %tmp20, i64 -7		; <i8*> [#uses=1]
	call void @llvm.memset.i64( i8* %ptroffset, i8 -1, i64 8, i32 1 )



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48940 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-29 05:15:47 +00:00
Chris Lattner
d22fe2b51f make the common case of a single store (which clearly shouldn't be turned 
into a memset!) faster by avoiding an allocation of an std::list node.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48939 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-29 04:52:12 +00:00
Chris Lattner
9f8a6a7498 give form-memset a significantly more sane heuristic, enable it by default. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48937 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-29 04:36:18 +00:00
Owen Anderson
c7c00361ce Remove some unneeded code for LiveInterval joining, and fix a bug in the Phi elimination algorithm where we were accidentally reasoning about 
the source rather than the destination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48936 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-29 01:58:47 +00:00
Dan Gohman
d4a2ad35e3 Fix a tokenfactor node to use the load chain rather than the 
load value. This fixes PR2177.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48932 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 23:45:16 +00:00
Evan Cheng
4db4f1ce7e Backing out 48911 for now. It's breaking stuff. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48922 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 17:49:06 +00:00
Chris Lattner
2a88a5c92f ifdef out a dead function. Should this be removed? 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48916 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 15:36:27 +00:00
Duncan Sands
e10efce225 Rename getAnyLoad to getLoad is suggested by Evan. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48914 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 09:45:24 +00:00
Evan Cheng
ddf0a06580 New entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48912 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 07:07:06 +00:00
Evan Cheng
86f57b0983 Load from stub is already re-materializable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48911 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 06:49:25 +00:00
Nick Lewycky
0c78ac11dd Update example to new syntax. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48910 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 06:46:51 +00:00
Chris Lattner
7f0965e7da make memset inference significantly more powerful: it can now handle 
memsets that initialize "structs of arrays" and other store sequences
that are not sequential.  This is still only enabled if you pass 
-form-memset-from-stores.  The flag is not heavily tested and I haven't
analyzed the perf regressions when -form-memset-from-stores is passed
either, but this causes no make check regressions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48909 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 06:45:13 +00:00
Evan Cheng
02bee85a70 New entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48908 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-28 06:34:23 +00:00
Duncan Sands
14ea39cf3c Implement LegalizeTypes support for softfloat LOAD. 
In order to handle indexed nodes I had to introduce
a new constructor, and since I was there I factorized
the code in the various load constructors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48894 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 20:23:40 +00:00
Dan Gohman
86e1ebf9bb Avoid creating chain dependencies from CopyToReg nodes to load and store 
nodes. This doesn't currently have much impact the generated code, but it
does produce simpler-looking SelectionDAGs, and consequently
simpler-looking ScheduleDAGs, because there are fewer spurious
dependencies.

In particular, CopyValueToVirtualRegister now uses the entry node as the
input chain dependency for new CopyToReg nodes instead of calling getRoot
and depending on the most recent memory reference.

Also, rename UnorderedChains to PendingExports and pull it up from being
a local variable in SelectionDAGISel::BuildSelectionDAG to being a
member variable of SelectionDAGISel, so that it doesn't have to be
passed around to all the places that need it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48893 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 19:56:19 +00:00
Devang Patel
4a3c0ac798 PHI->removeIncomingValue may remove PHInode. 
Increment iterator in advance.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48890 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 17:32:46 +00:00
Roman Levenstein
d7d3ea00c0 Fix spelling. Thanks, Duncan! :-) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48873 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 09:44:37 +00:00
Roman Levenstein
95d4184e72 Speed-up the SumOfUnscheduledPredsOfSuccs by introducing a new function 
called LimitedSumOfUnscheduledPredsOfSuccs. It terminates the computation
after a given treshold is reached. This new function is always faster, but
brings real wins only on bigger test-cases.

The old function SumOfUnscheduledPredsOfSuccs is left in-place for now and therefore a warning about an unused static function is produced.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48872 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 09:14:57 +00:00
Evan Cheng
e3d8dbf479 Code clean up. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48856 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 01:45:11 +00:00
Evan Cheng
e771ebd7a3 Allow certain lea instructions to be rematerialized. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48855 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 01:41:09 +00:00
Evan Cheng
d1e4b3515c Remove an unused command line option. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48854 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 01:30:24 +00:00
Evan Cheng
7a963fa8ee Fix a memory bug: increment an iterator of a deleted machine instr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48853 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 01:27:25 +00:00
Erick Tryzelaar
7c1483bc6f Expose ExecutionEngine::getTargetData() to c and ocaml bindings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48851 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-27 00:27:14 +00:00
Dale Johannesen
d9ffd4cb92 Fix a bug in Darwin EH: FDE->CIE pointer must 
be relocatable.  Describe why .set is needed better.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48848 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 23:31:39 +00:00
Evan Cheng
0c28432852 One more coalescer fix wrt deadness propagation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48837 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 20:15:49 +00:00
Evan Cheng
ed70cbb3f3 Avoid commuting a def MI in order to coalesce a copy instruction away if any use of the same val# is a copy instruction that has already been coalesced. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48833 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 19:03:01 +00:00
Roman Levenstein
e326332acd Use a linked data structure for the uses lists of an SDNode, just like 
LLVM Value/Use does and MachineRegisterInfo/MachineOperand does.
This allows constant time for all uses list maintenance operations.

The idea was suggested by Chris. Reviewed by Evan and Dan.
Patch is tested and approved by Dan.

On normal use-cases compilation speed is not affected. On very big basic
blocks there are compilation speedups in the range of 15-20% or even better. 



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48822 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 12:39:26 +00:00
Roman Levenstein
8dba9afd08 Fixed some spelling errors. Thanks, Duncan! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48819 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 11:23:38 +00:00
Roman Levenstein
e513ba4958 Some improvements related to the computation of isReachable. 
This fixes Bugzilla #1835 (http://llvm.org/bugs/show_bug.cgi?id=1835).
This patched is reviewed by Tanya and Dan. Dan tested and approved it.

The reason for the bad performance of the old algorithm is that it is very naive and scans every
time all nodes of the DAG in the worst case.

This patch introduces  a new algorithm based on the paper "Online algorithms
for maintaining the topological order of a directed acyclic graph" by
David J.Pearce and Paul H.J.Kelly. This is the MNR algorithm. It has a
linear time worst-case and performs much better in most situations.

The paper can be found here:
http://fano.ics.uci.edu/cites/Document/Online-algorithms-for-maintaining-the-topological-order-of-a-directed-acyclic-graph.html

The main idea of the new algorithm is to compute the topological ordering of the SNodes in the
DAG and to maintain it even after DAG modifications. The topological ordering allows for very fast 
node reachability checks. 

Tests on very big  input files with tens of thousands of instructions in a BB indicate huge 
speed-ups (up to 10x compilation time improvement) compared to the old version.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48817 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 09:18:09 +00:00
Evan Cheng
7aae876db1 Fix some SSE4.1 instruction encoding bugs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48815 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 08:11:49 +00:00
Owen Anderson
d382f8a32d Dead PHI instructions need to be handled specially. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48811 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-26 03:03:23 +00:00
Dale Johannesen
27c31054ec Use ## for comment delimiter on darwin x86-32, so 
llvm's output .s files will go through gcc -std=c99
without triggering preprocesser errors.  Approach
suggested by Daveed Vandevoorde.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48808 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 23:29:30 +00:00
Evan Cheng
e22e62b5c0 Smaller function alignment when optimizing for size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48805 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 22:29:46 +00:00
Evan Cheng
2659343f04 Rename option -optimizefor-size to -optimize-size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48804 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 22:28:39 +00:00
Owen Anderson
e4ded8937a Remove some debugging code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48803 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 22:26:43 +00:00
Owen Anderson
403dad6660 StrongPHIElimination doesn't support swapping live intervals like the coalescer does. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48802 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 22:25:27 +00:00
Dan Gohman
950a4c40b8 Add explicit keywords. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48801 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 22:06:05 +00:00
Dan Gohman
cfbb2f074d A quick nm audit turned up several fixed tables and objects that were 
marked read-write. Use const so that they can be allocated in a
read-only segment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48800 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 21:45:14 +00:00
Dan Gohman
62c7b8c371 Avoid outputing spaces at the ends of lines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48797 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 21:38:12 +00:00
Devang Patel
73ee9c3fb1 Do not align loops if optimizing for size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48794 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 21:03:02 +00:00