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1329 Commits

Author SHA1 Message Date
Nick Lewycky
a73a654bb4 Simplify, now that predsimplify depends on break-crit-edges. 
Fix SwitchInst where dest-block is the same as one of the cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30700 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-03 15:19:11 +00:00
Nick Lewycky
5c8c5d9ace Move break-crit-edges before the predicate simplifier. Allows us to 
optimize in more cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30699 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-03 14:52:23 +00:00
Chris Lattner
e831b9a48b Fix a bug from r1.391 of this file, where we checked the size instead of 
the alignment when promoting allocations.  This implements
InstCombine/cast.ll:test32


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30682 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-01 19:40:58 +00:00
Chris Lattner
47811b76ca Eliminate ConstantBool::True and ConstantBool::False. Instead, provide 
ConstantBool::getTrue() and ConstantBool::getFalse().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30665 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-28 23:35:22 +00:00
Chris Lattner
7514437133 set DEBUG_TYPE right 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30623 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-27 04:58:23 +00:00
Nick Lewycky
8f389d8cd4 Style changes only. Remove dead code, fix a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30588 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-23 15:13:08 +00:00
Chris Lattner
9ba46c13bf Fix Transforms/IndVarsSimplify/2006-09-20-LFTR-Crash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30555 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-21 05:12:20 +00:00
Nick Lewycky
009aa1d485 Don't rewrite ConstantExpr::get. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30552 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-21 01:05:35 +00:00
Nick Lewycky
af2f1fe94e Once we're down to "setcc type constant1, constant2", at least come up 
with the right answer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30550 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-20 23:02:24 +00:00
Nick Lewycky
406fc0cb49 Use a total ordering to compare instructions. 
Fixes infinite loop in resolve().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30540 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-20 17:04:01 +00:00
Andrew Lenharth
4563326472 simplify 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30535 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-20 15:37:57 +00:00
Chris Lattner
b8456460cb We went through all that trouble to compute whether it was safe to transform 
this comparison, but never checked it.  Whoops, no wonder we miscompiled
177.mesa!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30511 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-20 04:44:59 +00:00
Evan Cheng
571c15e38a Back out Chris' last set of changes. This breaks 177.mesa and povray somehow. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30505 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-20 01:39:40 +00:00
Evan Cheng
7df4ad9a7f 80 col. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30504 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-20 01:10:02 +00:00
Andrew Lenharth
16d7955eb0 If we have an add, do it in the pointer realm, not the int realm. This is critical in the linux kernel for pointer analysis correctness 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30496 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-19 18:24:51 +00:00
Chris Lattner
733f576d29 implement select.ll:test19-22 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30482 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-19 06:18:21 +00:00
Nick Lewycky
025f4c0fad Walk down the dominator tree instead of the control flow graph. That means 
that we can't modify the CFG any more, at least not until it's possible
to update the dominator tree (PR217).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30469 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-18 21:09:35 +00:00
Chris Lattner
6d7ca92bbf Fix an infinite loop building the CFE 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30465 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-18 18:27:05 +00:00
Chris Lattner
e695a3bd32 Implement InstCombine/cast.ll:test31. This speeds up 462.libquantum by 26%. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30456 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-18 05:27:43 +00:00
Chris Lattner
b7363791ed Implement Transforms/InstCombine/shift-sra.ll:test0 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30450 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-18 04:31:40 +00:00
Chris Lattner
65b72baa59 Rewrite shift/and/compare sequences to promote better licm of the RHS. 
Use isLogicalShift/isArithmeticShift to simplify code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30448 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-18 04:22:48 +00:00
Chris Lattner
f6bd07c7fe Fix Transforms/InstCombine/2006-09-15-CastToBool.ll and PR913 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30405 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-16 03:14:10 +00:00
Nick Lewycky
668a1d0fd2 Add some more consistency checks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30305 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-13 19:32:53 +00:00
Nick Lewycky
977be254c6 Fix unionSets so that it can merge correctly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30304 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-13 19:24:01 +00:00
Nick Lewycky
cf2112a0a0 Erase dead instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30298 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-13 18:55:37 +00:00
Chris Lattner
92f7365740 An sinkable instruction may exist with uses, if those uses are in dead blocks. 
Handle this.  This fixes PR908 and Transforms/LICM/2006-09-12-DeadUserOfSunkInstr.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30275 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-12 19:17:09 +00:00
Chris Lattner
63d3220dae Fix PR905 and InstCombine/2006-09-11-EmptyStructCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30266 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-11 21:43:16 +00:00
Nick Lewycky
3fc68ccd83 Skip the linear search if the answer is already known. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30251 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-11 17:23:34 +00:00
Chris Lattner
dfa1af0513 Allow tail duplication in more cases, relaxing the previous restriction a 
bit.  This fixes Regression/Transforms/TailDup/MergeTest.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30237 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-10 18:17:58 +00:00
Nick Lewycky
dc08cd56c4 Replace EquivalenceClasses with a custom-built data structure. Many common 
operations (like findProperties) should be faster, at the expense of
unionSets being slower in cases that are rare in practise.

Don't erase a dead Instruction. This fixes a memory corruption issue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30235 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-10 02:27:07 +00:00
Chris Lattner
2a86f3b744 Implement Transforms/InstCombine/hoist_instr.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30234 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-09 22:02:56 +00:00
Chris Lattner
8e49e08f4b Turn div X, (Cond ? Y : 0) -> div X, Y 
This implements select.ll::test18.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30230 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-09 20:26:32 +00:00
Chris Lattner
e99c623e75 Throttle back tail duplication to avoid creating really ugly sequences of code. 
For Transforms/TailDup/if-tail-dup.ll, f.e., it produces:

_foo:
        movl 8(%esp), %eax
        movl 4(%esp), %ecx
        testl $1, %ecx
        je LBB1_2       #cond_next
LBB1_1: #cond_true
        movl $1, (%eax)
LBB1_2: #cond_next
        testl $2, %ecx
        je LBB1_4       #cond_next10
LBB1_3: #cond_true6
        movl $1, 4(%eax)
LBB1_4: #cond_next10
        testl $4, %ecx
        je LBB1_6       #cond_next18
LBB1_5: #cond_true14
        movl $1, 8(%eax)
LBB1_6: #cond_next18
        testl $8, %ecx
        je LBB1_8       #return
LBB1_7: #cond_true22
        movl $1, 12(%eax)
        ret
LBB1_8: #return
        ret

instead of:

_foo:
        movl 4(%esp), %eax
        testl $2, %eax
        sete %cl
        movl 8(%esp), %edx
        testl $1, %eax
        je LBB1_2       #cond_next
LBB1_1: #cond_true
        movl $1, (%edx)
        testb %cl, %cl
        jne LBB1_4      #cond_next10
        jmp LBB1_3      #cond_true6
LBB1_2: #cond_next
        testb %cl, %cl
        jne LBB1_4      #cond_next10
LBB1_3: #cond_true6
        movl $1, 4(%edx)
        testl $4, %eax
        je LBB1_6       #cond_next18
        jmp LBB1_5      #cond_true14
LBB1_4: #cond_next10
        testl $4, %eax
        je LBB1_6       #cond_next18
LBB1_5: #cond_true14
        movl $1, 8(%edx)
        testl $8, %eax
        je LBB1_8       #return
        jmp LBB1_7      #cond_true22
LBB1_6: #cond_next18
        testl $8, %eax
        je LBB1_8       #return
LBB1_7: #cond_true22
        movl $1, 12(%edx)
        ret
LBB1_8: #return
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30158 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-07 21:30:15 +00:00
Nick Lewycky
a3a68bde21 Improve handling of SelectInst. 
Reorder operations to remove duplicated work.
Fix to leave floating-point types out of the optimization.
Add tests to predsimplify.ll for SwitchInst and SelectInst handling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30055 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-02 19:40:38 +00:00
Nick Lewycky
7218c28822 Don't confuse canonicalize and lookup. Fixes predsimplify.reg4.ll. Also 
corrects missing optimization opportunity removing cases from a switch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30009 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-09-01 03:26:35 +00:00
Nick Lewycky
6e39c7ed1e Properties where both Values weren't in the union (as being equal to 
another Value) weren't being found by findProperties.

This fixes predsimplify.ll test6, a missed optimization opportunity.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29991 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-31 00:39:16 +00:00
Nick Lewycky
3947a76e21 Move to using the EquivalenceClass ADT. Removes SynSets. 
If a branch's condition has become a ConstantBool, simplify it immediately.
Removing the edge saves work and exposes up more optimization opportunities
in the pass.
Add support for SelectInst.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29970 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-30 02:46:48 +00:00
Devang Patel
4b8f36f106 Do not rely on std::sort and std::erase to get list of unique 
exit blocks. The output is dependent on addresses of basic block.

Add and use Loop::getUniqueExitBlocks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29966 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-29 22:29:16 +00:00
Owen Anderson
d648e140a5 Clean up a bit. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29950 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-29 06:10:56 +00:00
Nick Lewycky
05450ae128 Add PredicateSimplifier pass. Collapses equal variables into one form 
and simplifies expressions. This implements the optimization described
in PR807.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29947 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-28 22:44:55 +00:00
Owen Anderson
59312b19a6 Make LoopUnroll fold excessive BasicBlocks. This results in a significant speedup of 
gccas on 252.eon


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29936 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-28 02:09:46 +00:00
Chris Lattner
7f8897f22e eliminate RegisterOpt. It does the same thing as RegisterPass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29925 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-27 22:42:52 +00:00
Chris Lattner
a4f0b3a084 s|llvm/Support/Visibility.h|llvm/Support/Compiler.h| 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29911 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-27 12:54:02 +00:00
Owen Anderson
203572552d Fix a crash related to updating Phi nodes in the original header block. This was 
causing a crash in 175.vpr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29887 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-25 22:13:55 +00:00
Owen Anderson
eb70591492 Add an assertion to check that we're really preserving LCSSA. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29886 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-25 22:12:36 +00:00
Owen Anderson
ac12322710 Reapply the indvars patch, since nothing blew up last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29874 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-25 17:41:25 +00:00
Owen Anderson
b397d81f03 Revert my previous patch. Since there are some major changes that went in today, 
I'm going to wait to put this in HEAD until tomorrow, so as not to clutter the nightly
tester.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29868 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-25 03:45:57 +00:00
Owen Anderson
8a24749cb8 Specify that indvars actually preserve LCSSA. This has been done for a while, but I 
forgot to put in the analysis usage.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29867 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-25 03:32:13 +00:00
Owen Anderson
3b53c4ee91 Implement unrolling of multiblock loops. This significantly improves the 
utility of the LoopUnroll pass.

Also, add a testcase for multiblock-loop unrolling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29859 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-24 21:28:19 +00:00
Reid Spencer
47a53ac726 Fix a grammaro in a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29765 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-08-18 09:01:07 +00:00