01371d64a9
Using "poison" better reflects realworld generated IR. The main idioms ported are: * Inserting into an undefined vector. * Vector splats. * Masked load/gather operations with an undefined passthrough.
29 lines
1.0 KiB
LLVM
29 lines
1.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=aarch64-none-linux-gnu -mattr=+neon,+sve | FileCheck %s
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define <16 x i8> @subsubii8(<16 x i8> %a, i8 %b) {
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; CHECK-LABEL: subsubii8:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: dup v0.16b, w0
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; CHECK-NEXT: ret
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entry:
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%sub = sub i8 0, %b
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%0 = insertelement <16 x i8> poison, i8 %sub, i32 0
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%sh_prom = shufflevector <16 x i8> %0, <16 x i8> poison, <16 x i32> zeroinitializer
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%sub2 = sub <16 x i8> zeroinitializer, %sh_prom
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ret <16 x i8> %sub2
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}
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define <vscale x 16 x i8> @subsubni8(<vscale x 16 x i8> %a, i8 %b) {
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; CHECK-LABEL: subsubni8:
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; CHECK: // %bb.0: // %entry
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; CHECK-NEXT: mov z0.b, w0
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; CHECK-NEXT: ret
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entry:
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%sub = sub i8 0, %b
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%0 = insertelement <vscale x 16 x i8> poison, i8 %sub, i32 0
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%sh_prom = shufflevector <vscale x 16 x i8> %0, <vscale x 16 x i8> poison, <vscale x 16 x i32> zeroinitializer
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%sub2 = sub <vscale x 16 x i8> zeroinitializer, %sh_prom
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ret <vscale x 16 x i8> %sub2
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}
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