RPCSX/llvm
1
0
Fork 0
mirror of https://github.com/RPCSX/llvm.git synced 2024-11-30 07:00:45 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

add another case of undefined behavior without crashing, PR3466.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63620 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-02-03 07:08:57 +00:00
parent 2eafb8b404
commit 55a683d7f0
2 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/Transforms/Scalar/ScalarReplAggregates.cpp
View File

@ -1431,8 +1431,9 @@ Value *SROA::ConvertUsesOfLoadToScalar(LoadInst *LI, AllocaInst *NewAI,
// Finally, unconditionally truncate the integer to the right width.
unsigned LIBitWidth = TD->getTypeSizeInBits(LI->getType());
if (LIBitWidth < NTy->getBitWidth())
NV = new TruncInst(NV, IntegerType::get(LIBitWidth),
LI->getName(), LI);
NV = new TruncInst(NV, IntegerType::get(LIBitWidth), LI->getName(), LI);
else if (LIBitWidth > NTy->getBitWidth())
NV = new ZExtInst(NV, IntegerType::get(LIBitWidth), LI->getName(), LI);
// If the result is an integer, this is a trunc or bitcast.
if (isa<IntegerType>(LI->getType())) {

9
test/Transforms/ScalarRepl/badarray.ll
View File

@ -1,4 +1,5 @@
; RUN: llvm-as < %s | opt -scalarrepl -instcombine | llvm-dis | not grep alloca
; PR3466
define i32 @test() {
%X = alloca [4 x i32] ; <[4 x i32]*> [#uses=1]
@ -9,3 +10,11 @@ define i32 @test() {
ret i32 %Z
}
define i32 @test2() nounwind {
entry:
%yx2.i = alloca float, align 4 ; <float*> [#uses=1]
%yx26.i = bitcast float* %yx2.i to i64* ; <i64*> [#uses=1]
%0 = load i64* %yx26.i, align 8 ; <i64> [#uses=0]
unreachable
}