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| # 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:
|