derek.holloway
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23 lines
868 B
YAML
23 lines
868 B
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
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# RUN: llc %s -o - -mtriple=riscv64 -mattr=+v -run-pass=riscv-vmv0-elimination -verify-machineinstrs | FileCheck %s
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# If we peek through a COPY to vmv0, we may leave it dead. Make sure we delete
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# it so the register allocator doesn't try to allocate it, which can lead to a
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# regalloc error.
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# https://github.com/llvm/llvm-project/pull/126850#issuecomment-2685166388
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---
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name: dead_copy
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body: |
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bb.0:
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liveins: $v8
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; CHECK-LABEL: name: dead_copy
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; CHECK: liveins: $v8
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: %x:vr = COPY $v8
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; CHECK-NEXT: $v0 = COPY %x
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; CHECK-NEXT: PseudoVSE8_V_M1_MASK $noreg, $noreg, $v0, -1 /* vl=VLMAX */, 3 /* e8 */
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%x:vr = COPY $v8
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%y:vmv0 = COPY %x:vr
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PseudoVSE8_V_M1_MASK $noreg, $noreg, %y:vmv0, -1, 3
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