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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168280 91177308-0d34-0410-b5e6-96231b3b80d8
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1 parent d82d755 commit f8c65fd2ea8a29dde25d37f5454a410831092205 @nlewycky nlewycky committed Nov 18, 2012
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3 lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
@@ -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;
}
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16 test/Transforms/InstCombine/alloca.ll
@@ -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

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