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Make the SLP store-merger less paranoid about function calls. We check for function calls when we check if it is safe to sink instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179207 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -65,10 +65,6 @@ struct SLPVectorizer : public BasicBlockPass {
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/// if we flush the chain creation every time we run into a memory barrier.
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bool CollectStores(BasicBlock *BB, BoUpSLP &R) {
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for (BasicBlock::iterator it = BB->begin(), e = BB->end(); it != e; ++it) {
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// Can't vectorize instructions with side effects.
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if (it->mayThrow())
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return false;
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StoreInst *SI = dyn_cast<StoreInst>(it);
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if (!SI)
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continue;
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40
test/Transforms/SLPVectorizer/X86/barriercall.ll
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40
test/Transforms/SLPVectorizer/X86/barriercall.ll
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@ -0,0 +1,40 @@
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; RUN: opt < %s -basicaa -slp-vectorizer -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.8.0"
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;CHECK: @foo
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;CHECK: store <4 x i32>
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;CHECK: ret
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define i32 @foo(i32* nocapture %A, i32 %n) #0 {
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entry:
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%call = tail call i32 (...)* @bar() #2
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%mul = mul nsw i32 %n, 5
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%add = add nsw i32 %mul, 9
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store i32 %add, i32* %A, align 4, !tbaa !0
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%mul1 = mul nsw i32 %n, 9
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%add2 = add nsw i32 %mul1, 9
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%arrayidx3 = getelementptr inbounds i32* %A, i64 1
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store i32 %add2, i32* %arrayidx3, align 4, !tbaa !0
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%mul4 = shl i32 %n, 3
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%add5 = add nsw i32 %mul4, 9
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%arrayidx6 = getelementptr inbounds i32* %A, i64 2
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store i32 %add5, i32* %arrayidx6, align 4, !tbaa !0
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%mul7 = mul nsw i32 %n, 10
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%add8 = add nsw i32 %mul7, 9
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%arrayidx9 = getelementptr inbounds i32* %A, i64 3
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store i32 %add8, i32* %arrayidx9, align 4, !tbaa !0
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ret i32 undef
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}
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; We can still vectorize the stores below.
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declare i32 @bar(...) #1
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attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind }
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!0 = metadata !{metadata !"int", metadata !1}
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!1 = metadata !{metadata !"omnipotent char", metadata !2}
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!2 = metadata !{metadata !"Simple C/C++ TBAA"}
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