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Take the FrameOffset into account when computing the alignment

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of stack objects. This fixes PR2656.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54646 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-08-11 18:27:03 +00:00
parent 1db3c92306
commit 8cea8ff34c
2 changed files with 24 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -4378,7 +4378,7 @@ static unsigned InferAlignment(SDValue Ptr, SelectionDAG &DAG) {
// FIXME: Handle FI+CST.
const MachineFrameInfo &MFI = *DAG.getMachineFunction().getFrameInfo();
if (MFI.isFixedObjectIndex(FrameIdx)) {
int64_t ObjectOffset = MFI.getObjectOffset(FrameIdx);
int64_t ObjectOffset = MFI.getObjectOffset(FrameIdx) + FrameOffset;
// The alignment of the frame index can be determined from its offset from
// the incoming frame position. If the frame object is at offset 32 and

23
test/CodeGen/X86/pr2656.ll Normal file
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@ -0,0 +1,23 @@
; RUN: llvm-as < %s | llc -march=x86 | grep {xorps.\*sp} | count 1
; PR2656
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i686-apple-darwin9.4.0"
%struct.anon = type <{ float, float }>
@.str = internal constant [17 x i8] c"pt: %.0f, %.0f\0A\00\00" ; <[17 x i8]*> [#uses=1]
define void @foo(%struct.anon* byval %p) nounwind {
entry:
%tmp = getelementptr %struct.anon* %p, i32 0, i32 0 ; <float*> [#uses=1]
%tmp1 = load float* %tmp ; <float> [#uses=1]
%tmp2 = getelementptr %struct.anon* %p, i32 0, i32 1 ; <float*> [#uses=1]
%tmp3 = load float* %tmp2 ; <float> [#uses=1]
%neg = sub float -0.000000e+00, %tmp1 ; <float> [#uses=1]
%conv = fpext float %neg to double ; <double> [#uses=1]
%neg4 = sub float -0.000000e+00, %tmp3 ; <float> [#uses=1]
%conv5 = fpext float %neg4 to double ; <double> [#uses=1]
%call = call i32 (...)* @printf( i8* getelementptr ([17 x i8]* @.str, i32 0, i32 0), double %conv, double %conv5 ) ; <i32> [#uses=0]
ret void
}
declare i32 @printf(...)