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Summary: The test case does an (out of bounds) load from a global constant with type <3 x float>. InstSimplify tried to turn this into an integer load of the whole alloc size of the vector, which is 128 bits due to alignment padding, and then bitcast this to <3 x vector> which failed an assertion due to the type size mismatch. The fix is to do an integer load of the normal size of the vector, with no alignment padding. Reviewers: tpr, arsenm, majnemer, dstuttard Reviewed By: arsenm Subscribers: hfinkel, wdng, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D63375 llvm-svn: 363784
41 lines
1.3 KiB
LLVM
41 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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@zeroinit = constant {} zeroinitializer
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@undef = constant {} undef
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define i32 @crash_on_zeroinit() {
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; CHECK-LABEL: @crash_on_zeroinit(
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; CHECK: ret i32 0
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;
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%load = load i32, i32* bitcast ({}* @zeroinit to i32*)
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ret i32 %load
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}
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define i32 @crash_on_undef() {
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; CHECK-LABEL: @crash_on_undef(
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; CHECK: ret i32 undef
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;
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%load = load i32, i32* bitcast ({}* @undef to i32*)
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ret i32 %load
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}
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@GV = private constant [8 x i32] [i32 42, i32 43, i32 44, i32 45, i32 46, i32 47, i32 48, i32 49]
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define <8 x i32> @partial_load() {
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; CHECK-LABEL: @partial_load(
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; CHECK: ret <8 x i32> <i32 0, i32 42, i32 43, i32 44, i32 45, i32 46, i32 47, i32 48>
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%load = load <8 x i32>, <8 x i32>* bitcast (i32* getelementptr ([8 x i32], [8 x i32]* @GV, i64 0, i64 -1) to <8 x i32>*)
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ret <8 x i32> %load
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}
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@constvec = internal constant <3 x float> <float 0xBFDA20BC40000000, float 0xBFE6A09EE0000000, float 0x3FE279A760000000>
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; This does an out of bounds load from the global constant
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define <3 x float> @load_vec3() {
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; CHECK-LABEL: @load_vec3(
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; CHECK-NEXT: ret <3 x float> undef
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%1 = load <3 x float>, <3 x float>* getelementptr inbounds (<3 x float>, <3 x float>* @constvec, i64 1)
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ret <3 x float> %1
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}
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