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1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 52# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -run-pass=register-coalescer -verify-coalescing -o - %s | FileCheck %s3 4# Test that an invalid subreg range is not introduced due to the undef5# %1.sub0 use. An undef use with a subregister index would end up6# introducing subranges for the empty and full lanemasks.7 8---9name: merge_with_undef_subreg_use_subrange_lanemask_is_invalid10tracksRegLiveness: true11machineFunctionInfo:12 isEntryFunction: true13 scratchRSrcReg: '$sgpr96_sgpr97_sgpr98_sgpr99'14 stackPtrOffsetReg: '$sgpr32'15 sgprForEXECCopy: '$sgpr100_sgpr101'16body: |17 ; CHECK-LABEL: name: merge_with_undef_subreg_use_subrange_lanemask_is_invalid18 ; CHECK: bb.0:19 ; CHECK-NEXT: successors: %bb.1(0x80000000)20 ; CHECK-NEXT: liveins: $sgpr8_sgpr921 ; CHECK-NEXT: {{ $}}22 ; CHECK-NEXT: [[COPY:%[0-9]+]]:sgpr_64 = COPY $sgpr8_sgpr923 ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM:%[0-9]+]]:sgpr_128 = S_LOAD_DWORDX4_IMM [[COPY]], 0, 0 :: (load (s128), addrspace 4)24 ; CHECK-NEXT: {{ $}}25 ; CHECK-NEXT: bb.1:26 ; CHECK-NEXT: successors: %bb.3(0x40000000), %bb.2(0x40000000)27 ; CHECK-NEXT: {{ $}}28 ; CHECK-NEXT: S_CBRANCH_VCCNZ %bb.3, implicit undef $vcc29 ; CHECK-NEXT: S_BRANCH %bb.230 ; CHECK-NEXT: {{ $}}31 ; CHECK-NEXT: bb.2:32 ; CHECK-NEXT: successors: %bb.3(0x80000000)33 ; CHECK-NEXT: {{ $}}34 ; CHECK-NEXT: undef [[S_LOAD_DWORDX4_IMM:%[0-9]+]].sub0:sgpr_128 = S_MOV_B32 035 ; CHECK-NEXT: {{ $}}36 ; CHECK-NEXT: bb.3:37 ; CHECK-NEXT: [[S_LOAD_DWORDX4_IMM:%[0-9]+]].sub1:sgpr_128 = COPY undef [[S_LOAD_DWORDX4_IMM]].sub038 ; CHECK-NEXT: S_ENDPGM 0, implicit [[S_LOAD_DWORDX4_IMM]]39 bb.0:40 liveins: $sgpr8_sgpr941 42 %0:sgpr_64 = COPY $sgpr8_sgpr943 %1:sgpr_128 = S_LOAD_DWORDX4_IMM %0, 0, 0 :: (load (s128), addrspace 4)44 45 bb.1:46 %2:sgpr_128 = COPY %147 S_CBRANCH_VCCNZ %bb.3, implicit undef $vcc48 S_BRANCH %bb.249 50 bb.2:51 undef %3.sub0:sgpr_128 = S_MOV_B32 052 %2:sgpr_128 = COPY killed %353 54 bb.3:55 %4:sgpr_128 = COPY killed %256 %4.sub1:sgpr_128 = COPY undef %1.sub057 S_ENDPGM 0, implicit %458 59...60