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[SLP] Propagate 'nontemporal' attribute into vectorized instructions.

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llvm-svn: 245633
This commit is contained in:
Michael Zolotukhin 2015-08-20 22:28:15 +00:00
parent 3f340be0fb
commit 977fe2551a
2 changed files with 50 additions and 0 deletions
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3
lib/Transforms/Vectorize/SLPVectorizer.cpp
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@ -242,6 +242,9 @@ static Instruction *propagateMetadata(Instruction *I, ArrayRef<Value *> VL) {
case LLVMContext::MD_fpmath:
MD = MDNode::getMostGenericFPMath(MD, IMD);
break;
case LLVMContext::MD_nontemporal:
MD = MDNode::intersect(MD, IMD);
break;
}
}
I->setMetadata(Kind, MD);

47
test/Transforms/SLPVectorizer/AArch64/nontemporal.ll Normal file
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@ -0,0 +1,47 @@
; RUN: opt -S -basicaa -slp-vectorizer -dce < %s | FileCheck %s
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios5.0.0"
; CHECK-LABEL: @foo
define void @foo(float* noalias %a, float* noalias %b, float* noalias %c) {
entry:
; Check that we don't lose !nontemporal hint when vectorizing loads.
; CHECK: %{{[0-9]*}} = load <4 x float>, <4 x float>* %{{[0-9]+}}, align 4, !nontemporal !0
%b1 = load float, float* %b, align 4, !nontemporal !0
%arrayidx.1 = getelementptr inbounds float, float* %b, i64 1
%b2 = load float, float* %arrayidx.1, align 4, !nontemporal !0
%arrayidx.2 = getelementptr inbounds float, float* %b, i64 2
%b3 = load float, float* %arrayidx.2, align 4, !nontemporal !0
%arrayidx.3 = getelementptr inbounds float, float* %b, i64 3
%b4 = load float, float* %arrayidx.3, align 4, !nontemporal !0
; Check that we don't introduce !nontemporal hint when the original scalar loads didn't have it.
; CHECK: %{{[0-9]*}} = load <4 x float>, <4 x float>* %{{[0-9]+}}, align 4{{$}}
%c1 = load float, float* %c, align 4
%arrayidx2.1 = getelementptr inbounds float, float* %c, i64 1
%c2 = load float, float* %arrayidx2.1, align 4
%arrayidx2.2 = getelementptr inbounds float, float* %c, i64 2
%c3 = load float, float* %arrayidx2.2, align 4
%arrayidx2.3 = getelementptr inbounds float, float* %c, i64 3
%c4 = load float, float* %arrayidx2.3, align 4
%a1 = fadd float %b1, %c1
%a2 = fadd float %b2, %c2
%a3 = fadd float %b3, %c3
%a4 = fadd float %b4, %c4
; Check that we don't lose !nontemporal hint when vectorizing stores.
; CHECK: store <4 x float> %{{[0-9]+}}, <4 x float>* %{{[0-9]+}}, align 4, !nontemporal !0
store float %a1, float* %a, align 4, !nontemporal !0
%arrayidx3.1 = getelementptr inbounds float, float* %a, i64 1
store float %a2, float* %arrayidx3.1, align 4, !nontemporal !0
%arrayidx3.2 = getelementptr inbounds float, float* %a, i64 2
store float %a3, float* %arrayidx3.2, align 4, !nontemporal !0
%arrayidx3.3 = getelementptr inbounds float, float* %a, i64 3
store float %a4, float* %arrayidx3.3, align 4, !nontemporal !0
; CHECK: ret void
ret void
}
!0 = !{i32 1}