| # RUN: llc -march=mips64 -o - %s -run-pass=register-coalescer -verify-coalescing | FileCheck %s |
| |
| --- |
| name: f |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| %0:gpr32 = ADDiu $zero, 0 |
| %1:gpr32 = COPY %0 |
| %1:gpr32 = ADDiu %1, 1 |
| BEQ %0, $zero, %bb.3, implicit-def $at |
| J %bb.1, implicit-def dead $at |
| |
| bb.1: |
| J %bb.2, implicit %1, implicit-def dead $at |
| |
| bb.2: |
| %1:gpr32 = COPY %0 |
| %0:gpr32 = COPY %1 |
| BEQ %0:gpr32, $zero, %bb.2, implicit-def $at |
| |
| bb.3: |
| %4:gpr32 = ADDiu %1, 1 |
| ... |
| |
| # We should not hoist the |
| # |
| # %1:gpr32 = COPY %0 |
| # |
| # into bb.1 since %1 is used in the terminating instruction J there. |
| |
| # CHECK-LABEL: bb.1: |
| # CHECK-NOT: COPY |
| # CHECK: J |
| |
| # CHECK-LABEL: bb.2: |
