diff options
| -rw-r--r-- | lib/Transforms/Vectorize/LoopVectorize.cpp | 4 | ||||
| -rw-r--r-- | test/Transforms/LoopVectorize/align.ll | 33 |
2 files changed, 37 insertions, 0 deletions
diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index bc649b3dbb..e624bb49f2 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -1205,6 +1205,10 @@ void InnerLoopVectorizer::vectorizeMemoryInstruction(Instruction *Instr, Type *DataTy = VectorType::get(ScalarDataTy, VF); Value *Ptr = LI ? LI->getPointerOperand() : SI->getPointerOperand(); unsigned Alignment = LI ? LI->getAlignment() : SI->getAlignment(); + // An alignment of 0 means target abi alignment. We need to use the scalar's + // target abi alignment in such a case. + if (!Alignment) + Alignment = DL->getABITypeAlignment(ScalarDataTy); unsigned AddressSpace = Ptr->getType()->getPointerAddressSpace(); unsigned ScalarAllocatedSize = DL->getTypeAllocSize(ScalarDataTy); unsigned VectorElementSize = DL->getTypeStoreSize(DataTy)/VF; diff --git a/test/Transforms/LoopVectorize/align.ll b/test/Transforms/LoopVectorize/align.ll new file mode 100644 index 0000000000..84b03615d3 --- /dev/null +++ b/test/Transforms/LoopVectorize/align.ll @@ -0,0 +1,33 @@ +; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -S | 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" + +; Make sure we output the abi alignment if no alignment is specified. + +;CHECK-LABEL: @align +;CHECK: load <4 x i32>* {{.*}} align 4 +;CHECK: load <4 x i32>* {{.*}} align 4 +;CHECK: store <4 x i32> {{.*}} align 4 + +define void @align(i32* %a, i32* %b, i32* %c) nounwind uwtable ssp { + br label %1 + +; <label>:1 ; preds = %1, %0 + %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ] + %2 = getelementptr inbounds i32* %b, i64 %indvars.iv + %3 = load i32* %2 + %4 = getelementptr inbounds i32* %c, i64 %indvars.iv + %5 = load i32* %4 + %6 = add nsw i32 %5, %3 + %7 = getelementptr inbounds i32* %a, i64 %indvars.iv + store i32 %6, i32* %7 + %indvars.iv.next = add i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next to i32 + %exitcond = icmp eq i32 %lftr.wideiv, 128 + br i1 %exitcond, label %8, label %1 + +; <label>:8 ; preds = %1 + ret void +} + |