1 # RUN: llc -march=amdgcn -run-pass=si-fix-sgpr-copies -o - %s | FileCheck --check-prefix=GCN %s
3 # GCN-LABEL: name: fix-sgpr-copies
10 %0:vgpr_32 = IMPLICIT_DEF
11 %1:sreg_32 = IMPLICIT_DEF
12 %2:sreg_32 = IMPLICIT_DEF
13 %3:sreg_32 = IMPLICIT_DEF
14 %4:vgpr_32 = V_CVT_U32_F32_e64 0, %0:vgpr_32, 0, 0, implicit $exec
15 %5:sreg_32 = COPY %4:vgpr_32
16 %6:sreg_32 = S_ADD_I32 %2:sreg_32, %5:sreg_32, implicit-def $scc
17 %7:sreg_32 = S_ADDC_U32 %3:sreg_32, %1:sreg_32, implicit-def $scc, implicit $scc
20 # Test to ensure i1 phi copies from scalar registers through another phi won't
21 # be promoted into vector ones.
22 # GCN-LABEL: name: fix-sgpr-i1-phi-copies
24 # GCN-NOT: vreg_64 = PHI
26 name: fix-sgpr-i1-phi-copies
27 tracksRegLiveness: true
33 S_CBRANCH_SCC1 %bb.6, implicit undef $scc
36 %3:vreg_1 = IMPLICIT_DEF
39 %4:vreg_1 = PHI %2:sreg_64, %bb.4, %3:vreg_1, %bb.5
42 %5:vreg_1 = PHI %2:sreg_64, %bb.3, %4:vreg_1, %bb.6
46 S_CBRANCH_SCC1 %bb.2, implicit undef $scc
49 %0:sreg_64 = S_MOV_B64 0
53 %1:sreg_64 = S_MOV_B64 -1
57 %2:sreg_64 = PHI %0:sreg_64, %bb.1, %1:sreg_64, %bb.2
58 S_CBRANCH_SCC1 %bb.7, implicit undef $scc
64 # Avoid infinite loop in SIInstrInfo::legalizeGenericOperand when checking for ImpDef.
65 # GCN-LABEL: name: legalize-operand-search-each-def-once
66 # GCN-NOT: sreg_64 PHI
68 name: legalize-operand-search-each-def-once
69 tracksRegLiveness: true
72 successors: %bb.1, %bb.2
75 %0:sgpr_64 = COPY $sgpr0_sgpr1
76 S_CBRANCH_VCCZ %bb.2, implicit undef $vcc
80 %1:vreg_64 = IMPLICIT_DEF
84 %2:sgpr_64 = PHI %0, %bb.0, %1, %bb.1
85 $sgpr0_sgpr1 = COPY %0
88 # A REG_SEQUENCE that uses registers defined by both a PHI and a COPY could
89 # result in an endless search.
90 # GCN-LABEL: name: process-phi-search-each-use-once
91 # GCN-NOT: sreg_32 PHI
93 name: process-phi-search-each-use-once
94 tracksRegLiveness: true
97 successors: %bb.1, %bb.2
100 %0:vgpr_32 = COPY $vgpr3
101 S_CBRANCH_VCCZ %bb.2, implicit undef $vcc
105 %1:sgpr_32 = IMPLICIT_DEF
109 %2:sgpr_32 = PHI %0, %bb.0, %1, %bb.1
110 %3:vreg_64 = REG_SEQUENCE %2, %subreg.sub0, %0, %subreg.sub1
111 $vgpr3 = COPY %3.sub0