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1# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -verify-machineinstrs -run-pass=si-opt-vgpr-liverange -o - %s | FileCheck %s2# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -passes=si-opt-vgpr-liverange -o - %s | FileCheck %s3#4# This is a very rare case which comes from llvm-reduce. The SI_IF/SI_ELSE usage is quite different from normal.5#6# CHECK-LABEL: name: unusual_if_else7---8name: unusual_if_else9tracksRegLiveness: true10machineFunctionInfo:11 scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'12 stackPtrOffsetReg: '$sgpr32'13body: |14 bb.0:15 successors: %bb.1(0x80000000)16 17 %0:sreg_32 = S_ADD_U32 undef %1.sub0:sgpr_64, 32, implicit-def $scc18 %2:sreg_32 = S_ADDC_U32 undef %1.sub1:sgpr_64, 0, implicit-def dead $scc, implicit killed $scc19 %3:sreg_64 = REG_SEQUENCE killed %0, %subreg.sub0, killed %2, %subreg.sub120 %4:vgpr_32 = V_MOV_B32_e32 0, implicit $exec21 22 bb.1:23 successors: %bb.2(0x40000000), %bb.4(0x40000000)24 25 %5:sreg_64 = V_CMP_LT_I32_e64 0, %4, implicit $exec26 %6:sreg_64 = SI_IF killed %5, %bb.2, implicit-def dead $exec, implicit-def dead $scc, implicit $exec27 S_BRANCH %bb.428 29 bb.2:30 successors: %bb.4(0x40000000), %bb.3(0x40000000)31 32 dead %7:sreg_64 = SI_ELSE killed %6, %bb.4, implicit-def dead $exec, implicit-def dead $scc, implicit $exec33 S_BRANCH %bb.334 35 bb.3:36 successors: %bb.4(0x80000000)37 38 %8:sreg_64 = V_CMP_EQ_U32_e64 0, killed %4, implicit $exec39 dead %9:sreg_64 = SI_IF killed %8, %bb.4, implicit-def dead $exec, implicit-def dead $scc, implicit $exec40 S_BRANCH %bb.441 42 bb.4:43 44...45