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Always set alignment of vectorized LD/ST in SLP-Vectorizer. <rdar://problem/16812145>

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207983 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Yi Jiang 2014-05-05 17:59:14 +00:00
parent b85d6905b5
commit 606660f1f3
2 changed files with 31 additions and 0 deletions
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4
lib/Transforms/Vectorize/SLPVectorizer.cpp
View File

@ -1622,6 +1622,8 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E) {
VecTy->getPointerTo(AS));
unsigned Alignment = LI->getAlignment();
LI = Builder.CreateLoad(VecPtr);
if (!Alignment)
Alignment = DL->getABITypeAlignment(LI->getPointerOperand()->getType());
LI->setAlignment(Alignment);
E->VectorizedValue = LI;
return propagateMetadata(LI, E->Scalars);
@ -1641,6 +1643,8 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E) {
Value *VecPtr = Builder.CreateBitCast(SI->getPointerOperand(),
VecTy->getPointerTo(AS));
StoreInst *S = Builder.CreateStore(VecValue, VecPtr);
if (!Alignment)
Alignment = DL->getABITypeAlignment(SI->getPointerOperand()->getType());
S->setAlignment(Alignment);
E->VectorizedValue = S;
return propagateMetadata(S, E->Scalars);

27
test/Transforms/SLPVectorizer/X86/align.ll Normal file
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@ -0,0 +1,27 @@
; RUN: opt < %s -basicaa -slp-vectorizer -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
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"
target triple = "x86_64-apple-macosx10.8.0"
; Simple 3-pair chain with loads and stores
; CHECK: test1
define void @test1(double* %a, double* %b, double* %c) {
entry:
%agg.tmp.i.i.sroa.0 = alloca [3 x double], align 16
; CHECK: %[[V0:[0-9]+]] = load <2 x double>* %[[V2:[0-9]+]], align 8
%i0 = load double* %a
%i1 = load double* %b
%mul = fmul double %i0, %i1
%store1 = getelementptr inbounds [3 x double]* %agg.tmp.i.i.sroa.0, i64 0, i64 1
%store2 = getelementptr inbounds [3 x double]* %agg.tmp.i.i.sroa.0, i64 0, i64 2
%arrayidx3 = getelementptr inbounds double* %a, i64 1
%i3 = load double* %arrayidx3, align 8
%arrayidx4 = getelementptr inbounds double* %b, i64 1
%i4 = load double* %arrayidx4, align 8
%mul5 = fmul double %i3, %i4
; CHECK: store <2 x double> %[[V1:[0-9]+]], <2 x double>* %[[V2:[0-9]+]], align 8
store double %mul, double* %store1
store double %mul5, double* %store2, align 16
; CHECK: ret
ret void
}