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Merging r128577

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_29@128579 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-03-30 21:44:24 +00:00
parent e2f380f127
commit dbfa8045af
2 changed files with 26 additions and 1 deletions
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4
lib/Transforms/Scalar/DeadStoreElimination.cpp
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@ -361,8 +361,10 @@ static bool isCompleteOverwrite(const AliasAnalysis::Location &Later,
// //
// |--earlier--| // |--earlier--|
// |----- later ------| // |----- later ------|
//
// We have to be careful here as *Off is signed while *.Size is unsigned.
if (EarlierOff >= LaterOff && if (EarlierOff >= LaterOff &&
EarlierOff + Earlier.Size <= LaterOff + Later.Size) uint64_t(EarlierOff - LaterOff) + Earlier.Size <= Later.Size)
return true; return true;
// Otherwise, they don't completely overlap. // Otherwise, they don't completely overlap.

23
test/Transforms/DeadStoreElimination/2011-03-25-DSEMiscompile.ll Normal file
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@ -0,0 +1,23 @@
; RUN: opt < %s -basicaa -dse -S | FileCheck %s
; PR9561
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-n8:16:32"
target triple = "i386-apple-darwin9.8"
@A = external global [0 x i32]
declare cc10 void @Func2(i32*, i32*, i32*, i32)
define cc10 void @Func1(i32* noalias %Arg1, i32* noalias %Arg2, i32* %Arg3, i32 %Arg4) {
entry:
store i32 add (i32 ptrtoint ([0 x i32]* @A to i32), i32 1), i32* %Arg2
; CHECK: store i32 add (i32 ptrtoint ([0 x i32]* @A to i32), i32 1), i32* %Arg2
%ln2gz = getelementptr i32* %Arg1, i32 14
%ln2gA = bitcast i32* %ln2gz to double*
%ln2gB = load double* %ln2gA
%ln2gD = getelementptr i32* %Arg2, i32 -3
%ln2gE = bitcast i32* %ln2gD to double*
store double %ln2gB, double* %ln2gE
; CHECK: store double %ln2gB, double* %ln2gE
tail call cc10 void @Func2(i32* %Arg1, i32* %Arg2, i32* %Arg3, i32 %Arg4) nounwind
ret void
}