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, _
# CHECK: %s5 = COPY %s0, implicit %q1, implicit-def %q1
# CHECK: VST1q32 %r0, 0, %q1, 14, _
# 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, _
name: func
body: |
  bb.0:
    %d2 = VMOVv2i32 2, 14, _
    %s5 = COPY %s0, implicit %q1, implicit-def %q1
    VST1q32 %r0, 0, %q1, 14, _
    %s4 = COPY %s20, implicit-def %q1
    %s5 = COPY %s0, implicit killed %d0, implicit %q1, implicit-def %q1
    VST1q32 %r2, 0, %q1, 14, _
...