62 lines · plain
1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py2# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 -verify-coalescing -run-pass=register-coalescer -o - %s | FileCheck %s3 4# %2 has an undef read in %bb.3, and this IR wouldn't be valid if it5# was a real read. After merging %2 into %0, we need to replace the6# copy of undef with an implicit_def since the copy introduced a new7# value.8 9---10name: coalesce_into_undef_copy11tracksRegLiveness: true12machineFunctionInfo:13 scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'14 stackPtrOffsetReg: '$sgpr32'15body: |16 ; CHECK-LABEL: name: coalesce_into_undef_copy17 ; CHECK: bb.0:18 ; CHECK-NEXT: successors: %bb.1(0x80000000)19 ; CHECK-NEXT: {{ $}}20 ; CHECK-NEXT: [[COPY:%[0-9]+]]:vreg_128_align2 = COPY undef %1:sgpr_128, implicit $exec21 ; CHECK-NEXT: S_BRANCH %bb.122 ; CHECK-NEXT: {{ $}}23 ; CHECK-NEXT: bb.1:24 ; CHECK-NEXT: successors: %bb.2(0x80000000)25 ; CHECK-NEXT: {{ $}}26 ; CHECK-NEXT: dead [[DEF:%[0-9]+]]:vreg_128_align2 = IMPLICIT_DEF27 ; CHECK-NEXT: [[COPY:%[0-9]+]].sub0:vreg_128_align2 = IMPLICIT_DEF28 ; CHECK-NEXT: {{ $}}29 ; CHECK-NEXT: bb.2:30 ; CHECK-NEXT: successors: %bb.2(0x80000000)31 ; CHECK-NEXT: {{ $}}32 ; CHECK-NEXT: dead [[V_INDIRECT_REG_READ_GPR_IDX_B32_V4_:%[0-9]+]]:vgpr_32 = V_INDIRECT_REG_READ_GPR_IDX_B32_V4 [[COPY]], undef %5:sgpr_32, 11, implicit-def $m0, implicit $m0, implicit $exec33 ; CHECK-NEXT: S_BRANCH %bb.234 ; CHECK-NEXT: {{ $}}35 ; CHECK-NEXT: bb.3:36 ; CHECK-NEXT: successors: %bb.1(0x40000000), %bb.4(0x40000000)37 ; CHECK-NEXT: {{ $}}38 ; CHECK-NEXT: [[COPY:%[0-9]+]]:vreg_128_align2 = IMPLICIT_DEF39 ; CHECK-NEXT: S_CBRANCH_EXECNZ %bb.1, implicit $exec40 ; CHECK-NEXT: {{ $}}41 ; CHECK-NEXT: bb.4:42 bb.0:43 %0:vreg_128_align2 = COPY undef %1:sgpr_128, implicit $exec44 S_BRANCH %bb.145 46 bb.1:47 %2:vreg_128_align2 = IMPLICIT_DEF48 %3:vreg_128_align2 = COPY killed %049 %3.sub0:vreg_128_align2 = IMPLICIT_DEF50 51 bb.2:52 dead %5:vgpr_32 = V_INDIRECT_REG_READ_GPR_IDX_B32_V4 %3, undef %6:sgpr_32, 11, implicit-def $m0, implicit $m0, implicit $exec53 S_BRANCH %bb.254 55 bb.3:56 %0:vreg_128_align2 = COPY undef %257 S_CBRANCH_EXECNZ %bb.1, implicit $exec58 59 bb.4:60 61...62