04f6934589
While working on D143731 I hit a case where a build_vector with 2 undef operands could be generated (with one undef hidden behind a bitcast). That made `reduceBuildVecTruncToBitCast` crash because it seems to assume there is at least one good operand. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D143886
18 lines
792 B
LLVM
18 lines
792 B
LLVM
; RUN: llc -march=amdgcn < %s | FileCheck %s
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; RUN: llc -march=amdgcn -mcpu=tonga < %s | FileCheck %s
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; RUN: llc -march=amdgcn -mcpu=gfx900 < %s | FileCheck %s
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; Checks that we don't crash when code produces a build_vector with two undef operands.
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; CHECK: {{^}}buildvector_undefs:
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define amdgpu_kernel void @buildvector_undefs(<2 x i16> %in) {
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entry:
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%i0 = call <16 x i16> @llvm.vector.insert.v16i16.v2i16(<16 x i16> poison, <2 x i16> %in, i64 0)
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%i1 = call <16 x i16> @llvm.vector.insert.v16i16.v2i16(<16 x i16> %i0, <2 x i16> zeroinitializer, i64 2)
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store <16 x i16> %i1, ptr addrspace(1) null, align 32
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ret void
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}
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declare <2 x i16> @llvm.vector.extract.v2i16.v16i16(<16 x i16>, i64 immarg)
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declare <16 x i16> @llvm.vector.insert.v16i16.v2i16(<16 x i16>, <2 x i16>, i64 immarg)
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