llvm/llvm/test/CodeGen/AMDGPU/subreg-intervals.mir

# RUN: llc -mtriple=amdgcn -run-pass liveintervals -debug-only=regalloc -verify-machineinstrs -o /dev/null %s 2>&1 | FileCheck %s
# RUN: llc -mtriple=amdgcn --passes='print<live-intervals>' -debug-only=regalloc -o /dev/null %s 2>&1 | FileCheck %s
# REQUIRES: asserts

# CHECK: INTERVALS
# CHECK: %0
# CHECK-LABEL: Machine code for function test1:

--- |
  define amdgpu_kernel void @test1() { ret void }
...
---
name: test1
registers:
  - { id: 0, class: sreg_64 }
body: |
  bb.0:
    S_CBRANCH_VCCNZ %bb.1, implicit undef $vcc
    S_BRANCH %bb.2

  bb.1:
    S_NOP 0, implicit-def undef %0.sub0
    S_BRANCH %bb.3

  bb.2:
    S_NOP 0, implicit-def %0
    S_BRANCH %bb.3

  bb.3:
    S_NOP 0
    S_NOP 0, implicit %0
...