llvm/llvm/test/CodeGen/Thumb/opt-phis.mir

# RUN: llc -mtriple thumbv6m-none-eabi -run-pass=opt-phis -verify-machineinstrs -o - %s | FileCheck %s
--- |
  target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
  target triple = "thumbv6m-arm-none-eabi"

  define i32 @funca() { unreachable }

...
---
name:            funca
tracksRegLiveness: true
body:             |
  bb.0:
    successors: %bb.2(0x40000000), %bb.3(0x40000000)

    %0:tgpr, dead $cpsr = tMOVi8 255, 14, $noreg
    %1:tgpr, dead $cpsr = tMOVi8 128, 14, $noreg
    tCMPi8 %0, 0, 14, $noreg, implicit-def $cpsr
    tBcc %bb.3, 1, $cpsr

  bb.2:
    successors: %bb.3(0x80000000)

  bb.3:
    successors: %bb.0(0x80000000)

    %2:tgpr = PHI %0, %bb.2, %0, %bb.0
    %3:tgpr, $cpsr = tSUBrr %1, killed %2, 14, $noreg
    %4:tgpr, $cpsr = tADDrr killed %3, killed %0, 14, $noreg
    tB %bb.0, 14, $noreg

# Make sure the kill flags are not incorrect
# CHECK-LABEL: name: funca
# CHECK-NOT: PHI
# CHECK: tSUBrr %1, %0
# CHECK: tADDrr killed %3, %0

...