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[VectorCombine] set preserve alias analysis 

As noted in D80236, moving the pass in the pipeline exposed this
shortcoming. Extra work to recalculate the alias results showed
up as a compile-time slowdown.
This commit is contained in:
Sanjay Patel 2020-05-22 16:22:27 -04:00
parent 485b9083fe
commit 024098ae53
5 changed files with 4 additions and 5 deletions
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4
llvm/lib/Transforms/Vectorize/VectorCombine.cpp
View File

@ -417,6 +417,8 @@ public:
AU.setPreservesCFG();
AU.addPreserved<DominatorTreeWrapperPass>();
AU.addPreserved<GlobalsAAWrapperPass>();
AU.addPreserved<AAResultsWrapperPass>();
AU.addPreserved<BasicAAWrapperPass>();
FunctionPass::getAnalysisUsage(AU);
}
@ -450,5 +452,7 @@ PreservedAnalyses VectorCombinePass::run(Function &F,
PreservedAnalyses PA;
PA.preserveSet<CFGAnalyses>();
PA.preserve<GlobalsAA>();
PA.preserve<AAManager>();
PA.preserve<BasicAA>();
return PA;
}

2
llvm/test/CodeGen/AMDGPU/opt-pipeline.ll
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@ -598,7 +598,6 @@
; GCN-O2-NEXT: SLP Vectorizer
; GCN-O2-NEXT: Optimize scalar/vector ops
; GCN-O2-NEXT: Early CSE
; GCN-O2-NEXT: Function Alias Analysis Results
; GCN-O2-NEXT: Optimization Remark Emitter
; GCN-O2-NEXT: Combine redundant instructions
; GCN-O2-NEXT: Canonicalize natural loops
@ -952,7 +951,6 @@
; GCN-O3-NEXT: SLP Vectorizer
; GCN-O3-NEXT: Optimize scalar/vector ops
; GCN-O3-NEXT: Early CSE
; GCN-O3-NEXT: Function Alias Analysis Results
; GCN-O3-NEXT: Optimization Remark Emitter
; GCN-O3-NEXT: Combine redundant instructions
; GCN-O3-NEXT: Canonicalize natural loops

1
llvm/test/Other/opt-O2-pipeline.ll
View File

@ -254,7 +254,6 @@
; CHECK-NEXT: SLP Vectorizer
; CHECK-NEXT: Optimize scalar/vector ops
; CHECK-NEXT: Early CSE
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Canonicalize natural loops

1
llvm/test/Other/opt-O3-pipeline.ll
View File

@ -259,7 +259,6 @@
; CHECK-NEXT: SLP Vectorizer
; CHECK-NEXT: Optimize scalar/vector ops
; CHECK-NEXT: Early CSE
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Canonicalize natural loops

1
llvm/test/Other/opt-Os-pipeline.ll
View File

@ -240,7 +240,6 @@
; CHECK-NEXT: SLP Vectorizer
; CHECK-NEXT: Optimize scalar/vector ops
; CHECK-NEXT: Early CSE
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Optimization Remark Emitter
; CHECK-NEXT: Combine redundant instructions
; CHECK-NEXT: Canonicalize natural loops