third_party/llvm-7.0/llvm/test/CodeGen/ARM/machine-copyprop.mir

# RUN: llc -o - %s -mtriple=armv7s-- -run-pass=machine-cp | FileCheck %s
---
# Test that machine copy prop recognizes the implicit-def operands on a COPY
# as clobbering the register.
# CHECK-LABEL: name: func
# CHECK: $d2 = VMOVv2i32 2, 14, $noreg
# CHECK: $s5 = COPY $s0, implicit $q1, implicit-def $q1
# CHECK: VST1q32 $r0, 0, $q1, 14, $noreg
# The following two COPYs must not be removed
# CHECK: $s4 = COPY $s20, implicit-def $q1
# CHECK: $s5 = COPY $s0, implicit killed $d0, implicit $q1, implicit-def $q1
# CHECK: VST1q32 $r2, 0, $q1, 14, $noreg
name: func
body: |
  bb.0:
    $d2 = VMOVv2i32 2, 14, $noreg
    $s5 = COPY $s0, implicit $q1, implicit-def $q1
    VST1q32 $r0, 0, $q1, 14, $noreg
    $s4 = COPY $s20, implicit-def $q1
    $s5 = COPY $s0, implicit killed $d0, implicit $q1, implicit-def $q1
    VST1q32 $r2, 0, $q1, 14, $noreg
...