1# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -verify-machineinstrs -run-pass=si-opt-vgpr-liverange -o - %s | FileCheck %s
2#
3# This is a very rare case which comes from llvm-reduce. The SI_IF/SI_ELSE usage is quite different from normal.
4#
5# CHECK-LABEL: name: unusual_if_else
6---
7name:            unusual_if_else
8tracksRegLiveness: true
9machineFunctionInfo:
10  scratchRSrcReg:  '$sgpr0_sgpr1_sgpr2_sgpr3'
11  stackPtrOffsetReg: '$sgpr32'
12body:             |
13  bb.0:
14    successors: %bb.1(0x80000000)
15
16    %0:sreg_32 = S_ADD_U32 undef %1.sub0:sgpr_64, 32, implicit-def $scc
17    %2:sreg_32 = S_ADDC_U32 undef %1.sub1:sgpr_64, 0, implicit-def dead $scc, implicit killed $scc
18    %3:sreg_64 = REG_SEQUENCE killed %0, %subreg.sub0, killed %2, %subreg.sub1
19    %4:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
20
21  bb.1:
22    successors: %bb.2(0x40000000), %bb.4(0x40000000)
23
24    %5:sreg_64 = V_CMP_LT_I32_e64 0, %4, implicit $exec
25    %6:sreg_64 = SI_IF killed %5, %bb.2, implicit-def dead $exec, implicit-def dead $scc, implicit $exec
26    S_BRANCH %bb.4
27
28  bb.2:
29    successors: %bb.4(0x40000000), %bb.3(0x40000000)
30
31    dead %7:sreg_64 = SI_ELSE killed %6, %bb.4, implicit-def dead $exec, implicit-def dead $scc, implicit $exec
32    S_BRANCH %bb.3
33
34  bb.3:
35    successors: %bb.4(0x80000000)
36
37    %8:sreg_64 = V_CMP_EQ_U32_e64 0, killed %4, implicit $exec
38    dead %9:sreg_64 = SI_IF killed %8, %bb.4, implicit-def dead $exec, implicit-def dead $scc, implicit $exec
39    S_BRANCH %bb.4
40
41  bb.4:
42
43...
44