# RUN: llc -march=mips64 -o - %s -run-pass=simple-register-coalescing | FileCheck %s

---
name:            f
tracksRegLiveness: true
body:             |
 bb.0:
    successors: %bb.1

    %21:gpr32 = ADDiu $zero, 0
    %22:gpr32 = COPY %21
    %22:gpr32 = ADDiu %22, 1
    J %bb.1, implicit-def dead $at

 bb.1:
    successors: %bb.2

    BEQ %22, $zero, %bb.2, implicit-def $at

 bb.2:
    successors: %bb.2, %bb.3

    %22:gpr32 = COPY %21
    %21:gpr32 = COPY %22
    BEQ undef %0:gpr32, $zero, %bb.2, implicit-def $at

 bb.3:

...

# We should not hoist the
#
#  %22:gpr32 = COPY %21
#
# into bb.1 since %22 is used in the BEQ.

# CHECK-LABEL: bb.1:
# CHECK-NOT:      COPY
# CHECK:          BEQ

# CHECK-LABEL: bb.2: