| # RUN: llc -o - %s -mtriple=amdgcn-amd-amdhsa-opencl -run-pass=simple-register-coalescing | FileCheck %s |
| --- |
| # Checks for a bug where subregister liveranges were not properly pruned for |
| # an IMPLCITI_DEF that gets removed completely. |
| # |
| # CHECK-LABEL: name: func |
| # IMPLICIT_DEF should be gone without llc hitting assertion failures. |
| # CHECK-NOT: IMPLICIT_DEF |
| name: func |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| undef %5.sub1 = V_MOV_B32_e32 0, implicit $exec |
| %6 = COPY %5 |
| S_CBRANCH_VCCZ %bb.2, implicit undef $vcc |
| |
| bb.1: |
| %1 : sreg_32_xm0 = S_MOV_B32 0 |
| undef %0.sub0 : sreg_64 = COPY %1 |
| %0.sub1 = COPY %1 |
| %4 : vreg_64 = COPY killed %0 |
| %5 : vreg_64 = IMPLICIT_DEF |
| %6 : vreg_64 = COPY killed %4 |
| |
| bb.2: |
| %2 : vgpr_32 = V_CVT_F32_I32_e32 killed %5.sub1, implicit $exec |
| |
| bb.3: |
| %3 : vgpr_32 = V_CVT_F32_I32_e32 killed %6.sub1, implicit $exec |
| S_ENDPGM |
| ... |
