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[Loads] Fix crash in is isDereferenceableAndAlignedPointer()
Summary: We were trying to add APInt values with different bit sizes after visiting an addrspacecast instruction which changed the bit width of the pointer. Reviewers: majnemer, hfinkel Subscribers: hfinkel, wdng, llvm-commits Differential Revision: https://reviews.llvm.org/D24774 llvm-svn: 285407
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llvm/test/Analysis/ValueTracking/dereferenceable-and-aligned.ll
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; RUN: opt < %s -licm -S | FileCheck %s | ||
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target datalayout = "e-p:32:32-p1:64:64-p4:64:64" | ||
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; Make sure isDereferenceableAndAlignePointer() doesn't crash when looking | ||
; walking pointer defs with an addrspacecast that changes pointer size. | ||
; CHECK-LABEL: @addrspacecast_crash | ||
define void @addrspacecast_crash() { | ||
bb: | ||
%tmp = alloca [256 x i32] | ||
br label %bb1 | ||
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bb1: | ||
%tmp2 = getelementptr inbounds [256 x i32], [256 x i32]* %tmp, i32 0, i32 36 | ||
%tmp3 = bitcast i32* %tmp2 to <4 x i32>* | ||
%tmp4 = addrspacecast <4 x i32>* %tmp3 to <4 x i32> addrspace(4)* | ||
%tmp5 = load <4 x i32>, <4 x i32> addrspace(4)* %tmp4 | ||
%tmp6 = xor <4 x i32> %tmp5, undef | ||
store <4 x i32> %tmp6, <4 x i32> addrspace(1)* undef | ||
br label %bb1 | ||
} |