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Compare type size instead of type _store_ size to make sure that BitCastInst 

will be valid. This fixes PR10820.

llvm-svn: 139005
This commit is contained in:
Jakub Staszak 2011-09-02 14:57:37 +00:00
parent f5769c1070
commit 7470fb01d0
2 changed files with 19 additions and 2 deletions
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4
llvm/lib/Transforms/Scalar/GVN.cpp
View File

@ -689,8 +689,8 @@ static Value *CoerceAvailableValueToLoadType(Value *StoredVal,
// If this is already the right type, just return it.
Type *StoredValTy = StoredVal->getType();
uint64_t StoreSize = TD.getTypeStoreSizeInBits(StoredValTy);
uint64_t LoadSize = TD.getTypeStoreSizeInBits(LoadedTy);
uint64_t StoreSize = TD.getTypeSizeInBits(StoredValTy);
uint64_t LoadSize = TD.getTypeSizeInBits(LoadedTy);
// If the store and reload are the same size, we can always reuse it.
if (StoreSize == LoadSize) {

17
llvm/test/Transforms/GVN/pr10820.ll Normal file
View File

@ -0,0 +1,17 @@
; RUN: opt < %s -basicaa -gvn -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-f128:128:128-n8:16:32:64"
target triple = "x86_64-unknown-linux-gnu"
@g = external global i31
define void @main() nounwind uwtable {
entry:
; CHECK: store i32
store i32 402662078, i32* bitcast (i31* @g to i32*), align 8
%0 = load i31* @g, align 8
; CHECK: store i31
store i31 %0, i31* undef, align 1
unreachable
}