| # RUN: llc -march=amdgcn -mcpu=gfx908 -run-pass=postra-machine-sink -verify-machineinstrs -o - %s | FileCheck %s |
| |
| # Don't sink copy that writes sub-register of another copy source register |
| # CHECK-LABEL: name: donotsinkcopy |
| # CHECK-LABEL: bb.0: |
| # CHECK: renamable $sgpr1 = COPY renamable $sgpr2 |
| # CHECK-LABEL: bb.1: |
| # CHECK: liveins: $sgpr0_sgpr1:0x000000000000000F |
| # CHECK: renamable $vgpr1_vgpr2 = COPY renamable $sgpr0_sgpr1 |
| |
| --- |
| name: donotsinkcopy |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $sgpr0, $sgpr2, $vgpr3 |
| S_CMP_LT_U32 renamable $sgpr2, target-flags(amdgpu-gotprel32-lo) 2, implicit-def $scc |
| renamable $sgpr1 = COPY renamable $sgpr2 |
| renamable $vgpr1_vgpr2 = COPY renamable $sgpr0_sgpr1 |
| S_CBRANCH_SCC0 %bb.2, implicit $scc |
| |
| bb.1: |
| liveins: $vgpr2, $sgpr0_sgpr1:0x00000003 |
| S_BRANCH %bb.4 |
| |
| bb.2: |
| liveins: $sgpr1 |
| |
| bb.4: |
| S_ENDPGM 0 |
| ... |
