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c159ef589c
APInt only knows how to compare values with the same BitWidth and asserts in all other cases. With this fix, function PerformORCombine does not use the APInt equality operator if the APInt values returned by 'isConstantSplat' differ in BitWidth. In that case they are different and no comparison is needed. llvm-svn: 199119
30 lines
1.1 KiB
LLVM
30 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -mattr=+neon | FileCheck %s
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; Check that the DAGCombiner does not crash with an assertion failure
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; when performing a target specific combine to simplify a 'or' dag node
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; according to the following rule:
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; (or (and B, A), (and C, ~A)) => (VBSL A, B, C)
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; The assertion failure was caused by an invalid comparison between APInt
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; values with different 'BitWidth'.
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define <8 x i8> @test1(<8 x i8> %a, <8 x i8> %b) {
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%tmp1 = and <8 x i8> %a, < i8 -1, i8 -1, i8 0, i8 0, i8 -1, i8 -1, i8 0, i8 0 >
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%tmp2 = and <8 x i8> %b, < i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0 >
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%tmp3 = or <8 x i8> %tmp1, %tmp2
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ret <8 x i8> %tmp3
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}
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; CHECK-LABEL: test1
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; CHECK: ret
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define <16 x i8> @test2(<16 x i8> %a, <16 x i8> %b) {
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%tmp1 = and <16 x i8> %a, < i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1 >
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%tmp2 = and <16 x i8> %b, < i8 -1, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0, i8 0 >
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%tmp3 = or <16 x i8> %tmp1, %tmp2
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ret <16 x i8> %tmp3
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}
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; CHECK-LABEL: test2
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; CHECK: ret
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