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Fix PR1780
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43893 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -7582,7 +7582,7 @@ static unsigned GetOrEnforceKnownAlignment(Value *V, TargetData *TD,
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unsigned PrefAlign = 0) {
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if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
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unsigned Align = GV->getAlignment();
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if (Align == 0 && TD)
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if (Align == 0 && TD && !isa<OpaqueType>(GV->getType()->getElementType()))
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Align = TD->getPrefTypeAlignment(GV->getType()->getElementType());
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// If there is a large requested alignment and we can, bump up the alignment
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19
test/Transforms/InstCombine/2007-11-07-OpaqueAlignCrash.ll
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19
test/Transforms/InstCombine/2007-11-07-OpaqueAlignCrash.ll
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@ -0,0 +1,19 @@
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; RUN: llvm-as < %s | opt -instcombine -disable-output
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; PR1780
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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-f80:32:32"
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target triple = "i686-pc-linux-gnu"
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%opaque_t = type opaque
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@g = external global %opaque_t
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define i32 @foo() {
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entry:
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%x = load i8* bitcast (%opaque_t* @g to i8*)
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%y = load i32* bitcast (%opaque_t* @g to i32*)
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%z = zext i8 %x to i32
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%r = add i32 %y, %z
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ret i32 %r
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}
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