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Don't try to calculate the alignment of an unsigned type. Fixes PR14371!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168280 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2012-11-18 05:39:39 +00:00
parent 5d6d89544d
commit 294c965146
2 changed files with 18 additions and 1 deletions
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3
lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
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@ -164,7 +164,8 @@ static unsigned getPointeeAlignment(Value *V, const DataLayout &TD) {
return TD.getPreferredAlignment(GV);
if (PointerType *PT = dyn_cast<PointerType>(V->getType()))
return TD.getABITypeAlignment(PT->getElementType());
if (PT->getElementType()->isSized())
return TD.getABITypeAlignment(PT->getElementType());
return 0;
}

16
test/Transforms/InstCombine/alloca.ll
View File

@ -94,3 +94,19 @@ entry:
tail call void @f(i32* %b)
ret void
}
; PR14371
%opaque_type = type opaque
%real_type = type { { i32, i32* } }
@opaque_global = external constant %opaque_type, align 4
define void @test7() {
entry:
%0 = alloca %real_type, align 4
%1 = bitcast %real_type* %0 to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %1, i8* bitcast (%opaque_type* @opaque_global to i8*), i32 8, i32 1, i1 false)
ret void
}
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind