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llvm-project/llvm/test/Transforms/GVN/rle-nonlocal.ll

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Make BasicAliasAnalysis a normal AliasAnalysis implementation which does normal initialization and normal chaining. Change the default AliasAnalysis implementation to NoAlias. Update StandardCompileOpts.h and friends to explicitly request BasicAliasAnalysis. Update tests to explicitly request -basicaa. llvm-svn: 116720
2010-10-19 02:04:47 +08:00
; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
Add basic support for performing whole-function RLE. Note: This has not yet been thoroughly tested. Use at your own risk. llvm-svn: 40489
2007-07-26 03:57:03 +08:00
Fix PR17952. The symptom is that an assertion is triggered. The assertion was added by me to detect the situation when value is propagated from dead blocks. (We can certainly get rid of assertion; it is safe to do so, because propagating value from dead block to alive join node is certainly ok.) The root cause of this bug is : edge-splitting is conducted on the fly, the edge being split could be a dead edge, therefore the block that split the critial edge needs to be flagged "dead" as well. There are 3 ways to fix this bug: 1) Get rid of the assertion as I mentioned eariler 2) When an dead edge is split, flag the inserted block "dead". 3) proactively split the critical edges connecting dead and live blocks when new dead blocks are revealed. This fix go for 3) with additional 2 LOC. Testing case was added by Rafael the other day. llvm-svn: 194424
2013-11-12 06:00:23 +08:00
define i32 @main(i32** %p, i32 %x, i32 %y) {
Add basic support for performing whole-function RLE. Note: This has not yet been thoroughly tested. Use at your own risk. llvm-svn: 40489
2007-07-26 03:57:03 +08:00
block1:
Fix PR17952. The symptom is that an assertion is triggered. The assertion was added by me to detect the situation when value is propagated from dead blocks. (We can certainly get rid of assertion; it is safe to do so, because propagating value from dead block to alive join node is certainly ok.) The root cause of this bug is : edge-splitting is conducted on the fly, the edge being split could be a dead edge, therefore the block that split the critial edge needs to be flagged "dead" as well. There are 3 ways to fix this bug: 1) Get rid of the assertion as I mentioned eariler 2) When an dead edge is split, flag the inserted block "dead". 3) proactively split the critical edges connecting dead and live blocks when new dead blocks are revealed. This fix go for 3) with additional 2 LOC. Testing case was added by Rafael the other day. llvm-svn: 194424
2013-11-12 06:00:23 +08:00
%cmp = icmp eq i32 %x, %y
br i1 %cmp , label %block2, label %block3
Add basic support for performing whole-function RLE. Note: This has not yet been thoroughly tested. Use at your own risk. llvm-svn: 40489
2007-07-26 03:57:03 +08:00
block2:
%a = load i32** %p
br label %block4
block3:
%b = load i32** %p
br label %block4
block4:
Avoid creating redundant PHIs in SSAUpdater::GetValueInMiddleOfBlock. This was already being done in SSAUpdater::GetValueAtEndOfBlock so I've just changed SSAUpdater to check for existing PHIs in both places. llvm-svn: 94690
2010-01-28 06:01:02 +08:00
; CHECK-NOT: %existingPHI = phi
; CHECK: %DEAD = phi
%existingPHI = phi i32* [ %a, %block2 ], [ %b, %block3 ]
Add basic support for performing whole-function RLE. Note: This has not yet been thoroughly tested. Use at your own risk. llvm-svn: 40489
2007-07-26 03:57:03 +08:00
%DEAD = load i32** %p
%c = load i32* %DEAD
Avoid creating redundant PHIs in SSAUpdater::GetValueInMiddleOfBlock. This was already being done in SSAUpdater::GetValueAtEndOfBlock so I've just changed SSAUpdater to check for existing PHIs in both places. llvm-svn: 94690
2010-01-28 06:01:02 +08:00
%d = load i32* %existingPHI
%e = add i32 %c, %d
ret i32 %e
Convert tests using "| wc -l | grep ..." to use the count script. llvm-svn: 41097
2007-08-15 21:36:28 +08:00
}