File: twoaddr-regsequence.mir

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llvm-toolchain-20 1%3A20.1.6-1~exp1
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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-amd-amdhsa -run-pass=liveintervals,twoaddressinstruction,register-coalescer -verify-machineinstrs -o - %s | FileCheck %s

# Check that LiveIntervals are correctly updated when eliminating REG_SEQUENCE.
---
name: f
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $vgpr0, $vgpr1

    ; CHECK-LABEL: name: f
    ; CHECK: liveins: $vgpr0, $vgpr1
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: undef [[COPY:%[0-9]+]].sub0:vreg_64 = COPY $vgpr0
    ; CHECK-NEXT: [[COPY:%[0-9]+]].sub1:vreg_64 = COPY $vgpr1
    ; CHECK-NEXT: $vgpr2_vgpr3 = COPY [[COPY]]
    ; CHECK-NEXT: S_NOP 0, implicit $vgpr2_vgpr3
    %0:vgpr_32 = COPY $vgpr0
    %1:vgpr_32 = COPY $vgpr1
    %35:vreg_64 = REG_SEQUENCE %0, %subreg.sub0, %1, %subreg.sub1
    $vgpr2_vgpr3 = COPY %35
    S_NOP 0, implicit $vgpr2_vgpr3
...