1 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
2 # RUN: llc -mtriple=amdgcn -mcpu=gfx1100 -run-pass=early-machinelicm %s -o - | FileCheck %s
3 # RUN: llc -mtriple=amdgcn -mcpu=gfx1100 -passes=early-machinelicm %s -o - | FileCheck %s
5 # Issue #100115: test that MachineLICM does not assert on the undef use operand
6 # of the REG_SEQUENCE instruction.
9 tracksRegLiveness: true
11 ; CHECK-LABEL: name: test_undef_use
13 ; CHECK-NEXT: successors: %bb.1(0x80000000)
14 ; CHECK-NEXT: liveins: $vgpr0, $vgpr1
16 ; CHECK-NEXT: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
17 ; CHECK-NEXT: [[DEF1:%[0-9]+]]:sreg_32 = IMPLICIT_DEF
20 ; CHECK-NEXT: successors: %bb.3(0x80000000)
22 ; CHECK-NEXT: [[REG_SEQUENCE:%[0-9]+]]:vreg_64 = REG_SEQUENCE undef %3:vgpr_32, %subreg.sub0, undef [[DEF]], %subreg.sub1
23 ; CHECK-NEXT: S_BRANCH %bb.3
26 ; CHECK-NEXT: successors: %bb.5(0x04000000), %bb.1(0x7c000000)
28 ; CHECK-NEXT: $vcc_lo = COPY undef [[DEF1]]
29 ; CHECK-NEXT: S_CBRANCH_VCCNZ %bb.5, implicit $vcc_lo
30 ; CHECK-NEXT: S_BRANCH %bb.1
33 ; CHECK-NEXT: successors: %bb.4(0x04000000), %bb.3(0x7c000000)
35 ; CHECK-NEXT: S_CBRANCH_SCC1 %bb.3, implicit undef $scc
36 ; CHECK-NEXT: S_BRANCH %bb.4
39 ; CHECK-NEXT: successors: %bb.2(0x40000000), %bb.1(0x40000000)
41 ; CHECK-NEXT: SI_LOOP undef [[DEF1]], %bb.1, implicit-def dead $exec, implicit-def dead $scc, implicit $exec
42 ; CHECK-NEXT: S_BRANCH %bb.2
45 ; CHECK-NEXT: S_ENDPGM 0
47 successors: %bb.1(0x80000000)
48 liveins: $vgpr0, $vgpr1
50 %0:vgpr_32 = IMPLICIT_DEF
51 %1:sreg_32 = IMPLICIT_DEF
54 successors: %bb.3(0x80000000)
56 %2:vreg_64 = REG_SEQUENCE undef %3:vgpr_32, %subreg.sub0, undef %0, %subreg.sub1
60 successors: %bb.5(0x04000000), %bb.1(0x7c000000)
62 $vcc_lo = COPY undef %1
63 S_CBRANCH_VCCNZ %bb.5, implicit $vcc
67 successors: %bb.4(0x04000000), %bb.3(0x7c000000)
69 S_CBRANCH_SCC1 %bb.3, implicit undef $scc
73 successors: %bb.2(0x40000000), %bb.1(0x40000000)
75 SI_LOOP undef %1, %bb.1, implicit-def dead $exec, implicit-def dead $scc, implicit $exec