1 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2 # RUN: llc -mtriple=amdgcn -start-before=greedy -stop-after=virtregrewriter -stress-regalloc=3 -verify-machineinstrs -o - %s | FileCheck -check-prefix=GCN %s
4 # Check that subreg use is live at the point of materialization, not just the main range.
5 # Do not rematerialize if used subreg is dead at a new index.
9 tracksRegLiveness: true
12 ; GCN-LABEL: name: dead_subreg
13 ; GCN: $m0 = IMPLICIT_DEF
14 ; GCN-NEXT: renamable $sgpr0_sgpr1 = S_MOV_B64 1, implicit $m0
15 ; GCN-NEXT: renamable $sgpr1 = S_MUL_I32 renamable $sgpr1, 3
16 ; GCN-NEXT: SI_SPILL_S32_SAVE killed renamable $sgpr1, %stack.0, implicit $exec, implicit $sp_reg :: (store (s32) into %stack.0, addrspace 5)
17 ; GCN-NEXT: renamable $sgpr2 = S_MOV_B32 2, implicit $m0
18 ; GCN-NEXT: renamable $sgpr1 = S_MOV_B32 3, implicit $m0
19 ; GCN-NEXT: dead [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 $sgpr0, implicit $exec, implicit killed $sgpr2, implicit killed $sgpr1
20 ; GCN-NEXT: renamable $sgpr1 = SI_SPILL_S32_RESTORE %stack.0, implicit $exec, implicit $sp_reg :: (load (s32) from %stack.0, addrspace 5)
21 ; GCN-NEXT: dead [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 killed $sgpr1, implicit $exec
22 ; GCN-NEXT: S_NOP 0, implicit killed renamable $sgpr0
24 %0:sreg_64_xexec = S_MOV_B64 1, implicit $m0
25 %1:sreg_32 = S_MUL_I32 %0.sub1:sreg_64_xexec, 3
26 %2:sreg_32 = S_MOV_B32 2, implicit $m0
27 %3:sreg_32 = S_MOV_B32 3, implicit $m0
28 %4:vgpr_32 = V_MOV_B32_e32 %0.sub0:sreg_64_xexec, implicit $exec, implicit %2, implicit %3
29 %5:vgpr_32 = V_MOV_B32_e32 %1:sreg_32, implicit $exec
30 S_NOP 0, implicit %0.sub0
34 tracksRegLiveness: true
37 ; GCN-LABEL: name: live_subreg
38 ; GCN: $m0 = IMPLICIT_DEF
39 ; GCN-NEXT: renamable $sgpr4_sgpr5 = S_MOV_B64 1, implicit $m0
40 ; GCN-NEXT: renamable $sgpr2 = S_MOV_B32 2, implicit $m0
41 ; GCN-NEXT: SI_SPILL_S32_SAVE killed renamable $sgpr2, %stack.0, implicit $exec, implicit $sp_reg :: (store (s32) into %stack.0, addrspace 5)
42 ; GCN-NEXT: renamable $sgpr2 = S_MOV_B32 3, implicit $m0
43 ; GCN-NEXT: renamable $sgpr0 = SI_SPILL_S32_RESTORE %stack.0, implicit $exec, implicit $sp_reg :: (load (s32) from %stack.0, addrspace 5)
44 ; GCN-NEXT: dead [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 $sgpr4, implicit $exec, implicit killed $sgpr0, implicit killed $sgpr2
45 ; GCN-NEXT: renamable $sgpr0 = S_MUL_I32 renamable $sgpr5, 3
46 ; GCN-NEXT: dead [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 killed $sgpr0, implicit $exec
47 ; GCN-NEXT: S_NOP 0, implicit killed renamable $sgpr5
49 %0:sreg_64_xexec = S_MOV_B64 1, implicit $m0
50 %1:sreg_32 = S_MUL_I32 %0.sub1:sreg_64_xexec, 3
51 %2:sreg_32 = S_MOV_B32 2, implicit $m0
52 %3:sreg_32 = S_MOV_B32 3, implicit $m0
53 %4:vgpr_32 = V_MOV_B32_e32 %0.sub0:sreg_64_xexec, implicit $exec, implicit %2, implicit %3
54 %5:vgpr_32 = V_MOV_B32_e32 %1:sreg_32, implicit $exec
55 S_NOP 0, implicit %0.sub1
58 name: partially_live_wide_subreg
59 tracksRegLiveness: true
62 ; GCN-LABEL: name: partially_live_wide_subreg
63 ; GCN: renamable $sgpr0_sgpr1 = IMPLICIT_DEF
64 ; GCN-NEXT: renamable $sgpr8_sgpr9_sgpr10_sgpr11 = S_LOAD_DWORDX4_IMM killed renamable $sgpr0_sgpr1, 1, 0
65 ; GCN-NEXT: renamable $sgpr4_sgpr5 = S_MOV_B64 renamable $sgpr10_sgpr11
66 ; GCN-NEXT: SI_SPILL_S64_SAVE killed renamable $sgpr4_sgpr5, %stack.0, implicit $exec, implicit $sp_reg :: (store (s64) into %stack.0, align 4, addrspace 5)
67 ; GCN-NEXT: renamable $sgpr4_sgpr5 = S_MOV_B64 3, implicit $m0
68 ; GCN-NEXT: renamable $sgpr0_sgpr1 = S_MOV_B64 2, implicit $m0
69 ; GCN-NEXT: dead [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 $sgpr8, implicit $exec, implicit killed $sgpr0_sgpr1, implicit killed $sgpr4_sgpr5
70 ; GCN-NEXT: renamable $sgpr4_sgpr5 = SI_SPILL_S64_RESTORE %stack.0, implicit $exec, implicit $sp_reg :: (load (s64) from %stack.0, align 4, addrspace 5)
71 ; GCN-NEXT: dead [[V_MOV_B:%[0-9]+]]:vreg_64 = V_MOV_B64_PSEUDO killed $sgpr4_sgpr5, implicit $exec
72 ; GCN-NEXT: S_NOP 0, implicit killed renamable $sgpr8, implicit renamable $sgpr11
73 %0:sreg_64 = IMPLICIT_DEF
74 %1:sgpr_128 = S_LOAD_DWORDX4_IMM %0, 1, 0
75 %2:sreg_64 = S_MOV_B64 %1.sub2_sub3
76 %3:sreg_64 = S_MOV_B64 2, implicit $m0
77 %4:sreg_64 = S_MOV_B64 3, implicit $m0
78 %5:vgpr_32 = V_MOV_B32_e32 %1.sub0, implicit $exec, implicit %3, implicit %4
79 %6:vreg_64 = V_MOV_B64_PSEUDO %2, implicit $exec
80 S_NOP 0, implicit %1.sub0, implicit %1.sub3
83 name: dead_subreg_whole_reg
84 tracksRegLiveness: true
87 ; GCN-LABEL: name: dead_subreg_whole_reg
88 ; GCN: $m0 = IMPLICIT_DEF
89 ; GCN-NEXT: renamable $sgpr0_sgpr1 = S_MOV_B64 1, implicit $m0
90 ; GCN-NEXT: renamable $sgpr2_sgpr3 = S_MOV_B64 renamable $sgpr0_sgpr1
91 ; GCN-NEXT: SI_SPILL_S64_SAVE killed renamable $sgpr2_sgpr3, %stack.0, implicit $exec, implicit $sp_reg :: (store (s64) into %stack.0, align 4, addrspace 5)
92 ; GCN-NEXT: renamable $sgpr4_sgpr5 = S_MOV_B64 2, implicit $m0
93 ; GCN-NEXT: renamable $sgpr2_sgpr3 = S_MOV_B64 3, implicit $m0
94 ; GCN-NEXT: dead [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 $sgpr0, implicit $exec, implicit killed $sgpr4_sgpr5, implicit killed $sgpr2_sgpr3
95 ; GCN-NEXT: renamable $sgpr2_sgpr3 = SI_SPILL_S64_RESTORE %stack.0, implicit $exec, implicit $sp_reg :: (load (s64) from %stack.0, align 4, addrspace 5)
96 ; GCN-NEXT: dead [[V_MOV_B:%[0-9]+]]:vreg_64 = V_MOV_B64_PSEUDO killed $sgpr2_sgpr3, implicit $exec
97 ; GCN-NEXT: S_NOP 0, implicit killed renamable $sgpr0
99 %0:sreg_64_xexec = S_MOV_B64 1, implicit $m0
100 %1:sreg_64 = S_MOV_B64 %0:sreg_64_xexec
101 %2:sreg_64 = S_MOV_B64 2, implicit $m0
102 %3:sreg_64 = S_MOV_B64 3, implicit $m0
103 %4:vgpr_32 = V_MOV_B32_e32 %0.sub0:sreg_64_xexec, implicit $exec, implicit %2, implicit %3
104 %5:vreg_64 = V_MOV_B64_PSEUDO %1, implicit $exec
105 S_NOP 0, implicit %0.sub0