1# RUN: llc %s -o - -start-before=phi-node-elimination \ 2# RUN: -stop-after=stack-slot-coloring -simplify-mir \ 3# RUN: -experimental-debug-variable-locations=true \ 4# RUN: | FileCheck %s --check-prefix=DBGPHIS 5# 6# Test that DBG_PHI instructions do not add "weight" to stack slots and cause 7# their coalescing / coloring to change. This is hard to trigger, because it's 8# closely coupled with the register allocator. Thus, the test is very 9# complicated and hard to reduce. 10# 11# Future register allocator changes might change the slot; in that case, just 12# update the slot number, so long as it's the same between each RUN. 13# 14# DBGPHIS: DBG_PHI %stack.4, 15 16--- | 17 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 18 target triple = "x86_64-unknown-linux-gnu" 19 20 define hidden fastcc i64 @amd64_push_arguments(ptr %regcache, ptr %args) unnamed_addr !dbg !4 { 21 ret i64 0 22 } 23 24 ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn 25 declare void @llvm.dbg.value(metadata, metadata, metadata) 26 27 !llvm.module.flags = !{!0, !1} 28 !llvm.dbg.cu = !{!2} 29 30 !0 = !{i32 2, !"Debug Info Version", i32 3} 31 !1 = !{i32 2, !"Dwarf Version", i32 4} 32 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "beards", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug) 33 !3 = !DIFile(filename: "bees.cpp", directory: ".") 34 !4 = distinct !DISubprogram(name: "nope", scope: !3, file: !3, line: 1, type: !5, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !8) 35 !5 = !DISubroutineType(types: !6) 36 !6 = !{!7} 37 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 38 !8 = !{} 39 !9 = !DILocation(line: 0, scope: !4) 40 !10 = !DILocalVariable(name: "flannel", scope: !4, file: !3, line: 1, type: !7) 41... 42--- 43name: amd64_push_arguments 44alignment: 16 45tracksRegLiveness: true 46debugInstrRef: true 47registers: 48 - { id: 0, class: gr32 } 49 - { id: 1, class: gr32 } 50 - { id: 2, class: gr32 } 51 - { id: 3, class: gr64 } 52 - { id: 4, class: gr32 } 53 - { id: 5, class: gr32 } 54 - { id: 6, class: gr32 } 55 - { id: 7, class: gr32 } 56 - { id: 8, class: gr64 } 57 - { id: 9, class: gr32 } 58 - { id: 10, class: gr32 } 59 - { id: 11, class: gr64 } 60 - { id: 12, class: gr32 } 61 - { id: 13, class: gr64 } 62 - { id: 14, class: gr32 } 63 - { id: 15, class: gr64 } 64 - { id: 16, class: gr64 } 65 - { id: 17, class: gr64 } 66 - { id: 18, class: gr32 } 67 - { id: 19, class: gr8 } 68 - { id: 20, class: gr64 } 69 - { id: 21, class: gr32 } 70 - { id: 22, class: gr32 } 71 - { id: 23, class: gr8 } 72 - { id: 24, class: gr32 } 73 - { id: 25, class: gr32 } 74 - { id: 26, class: gr32 } 75 - { id: 27, class: gr32 } 76 - { id: 28, class: gr8 } 77 - { id: 29, class: gr32 } 78 - { id: 30, class: gr8 } 79 - { id: 31, class: gr32 } 80 - { id: 32, class: gr32 } 81 - { id: 33, class: gr32 } 82 - { id: 34, class: gr8 } 83 - { id: 35, class: gr32 } 84 - { id: 36, class: gr64 } 85 - { id: 37, class: gr32 } 86 - { id: 38, class: gr32 } 87 - { id: 39, class: gr8 } 88 - { id: 40, class: gr32 } 89 - { id: 41, class: gr8 } 90 - { id: 42, class: gr32 } 91 - { id: 43, class: gr32 } 92 - { id: 44, class: gr64_nosp } 93 - { id: 45, class: gr64 } 94 - { id: 46, class: gr32 } 95 - { id: 47, class: gr64 } 96 - { id: 48, class: gr32 } 97 - { id: 49, class: gr32 } 98 - { id: 50, class: gr64 } 99 - { id: 51, class: gr64 } 100 - { id: 52, class: gr64 } 101 - { id: 53, class: gr64 } 102 - { id: 54, class: gr32 } 103 - { id: 55, class: gr64 } 104 - { id: 56, class: gr32 } 105liveins: 106 - { reg: '$rdi', virtual-reg: '%15' } 107frameInfo: 108 maxAlignment: 8 109 adjustsStack: true 110 hasCalls: true 111stack: 112 - { id: 0, size: 8, alignment: 8 } 113 - { id: 1, type: variable-sized, alignment: 1 } 114machineFunctionInfo: {} 115body: | 116 bb.0: 117 successors: %bb.2(0x00000800), %bb.1(0x7ffff800) 118 liveins: $rdi 119 120 %15:gr64 = COPY killed $rdi 121 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 122 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 123 %18:gr32 = MOV32r0 implicit-def dead $eflags 124 %19:gr8 = COPY killed %18.sub_8bit 125 TEST8rr killed %19, %19, implicit-def $eflags, debug-location !9 126 JCC_1 %bb.2, 5, implicit killed $eflags, debug-location !9 127 JMP_1 %bb.1, debug-location !9 128 129 bb.1: 130 RET 0, undef $rax 131 132 bb.2: 133 %27:gr32 = MOV32r0 implicit-def dead $eflags 134 %50:gr64 = LEA64r %stack.0, 1, $noreg, 0, $noreg 135 %54:gr32 = MOV32ri 8 136 137 bb.3: 138 successors: %bb.4, %bb.5 139 140 %0:gr32 = PHI undef %21:gr32, %bb.2, %0, %bb.5, %0, %bb.6, %0, %bb.8, %0, %bb.10, %10, %bb.21 141 %23:gr8 = COPY %27.sub_8bit 142 TEST8rr killed %23, %23, implicit-def $eflags, debug-location !9 143 JCC_1 %bb.5, 5, implicit killed $eflags, debug-location !9 144 JMP_1 %bb.4, debug-location !9 145 146 bb.4: 147 %24:gr32 = MOV32ri 1 148 149 bb.5: 150 successors: %bb.3(0x20000000), %bb.6(0x60000000) 151 152 %1:gr32 = PHI %27, %bb.3, %24, %bb.4, debug-location !9 153 %25:gr32 = nsw ADD32rr %1, %0, implicit-def dead $eflags, debug-location !9 154 CMP32ri killed %25, 6, implicit-def $eflags, debug-location !9 155 JCC_1 %bb.3, 7, implicit killed $eflags, debug-location !9 156 JMP_1 %bb.6, debug-location !9 157 158 bb.6: 159 successors: %bb.3(0x2aaaaaab), %bb.7(0x55555555) 160 161 %28:gr8 = COPY %27.sub_8bit 162 TEST8rr killed %28, %28, implicit-def $eflags, debug-location !9 163 JCC_1 %bb.3, 5, implicit killed $eflags, debug-location !9 164 JMP_1 %bb.7, debug-location !9 165 166 bb.7: 167 successors: %bb.8(0x60000000), %bb.9(0x20000000) 168 169 TEST32rr killed %1, %1, implicit-def $eflags, debug-location !9 170 JCC_1 %bb.9, 5, implicit killed $eflags, debug-location !9 171 JMP_1 %bb.8, debug-location !9 172 173 bb.8: 174 successors: %bb.3(0x55555555), %bb.9(0x2aaaaaab) 175 176 %30:gr8 = COPY %27.sub_8bit 177 TEST8rr killed %30, %30, implicit-def $eflags, debug-location !9 178 JCC_1 %bb.3, 5, implicit killed $eflags, debug-location !9 179 JMP_1 %bb.9, debug-location !9 180 181 bb.9: 182 successors: %bb.10(0x80000000), %bb.12(0x00000000) 183 184 CMP32ri undef %32:gr32, 16, implicit-def $eflags, debug-location !9 185 JCC_1 %bb.12, 15, implicit killed $eflags, debug-location !9 186 JMP_1 %bb.10, debug-location !9 187 188 bb.10: 189 successors: %bb.11, %bb.3 190 191 %34:gr8 = COPY %27.sub_8bit 192 TEST8rr killed %34, %34, implicit-def $eflags, debug-location !9 193 JCC_1 %bb.3, 5, implicit killed $eflags, debug-location !9 194 JMP_1 %bb.11, debug-location !9 195 196 bb.11: 197 %36:gr64 = SUBREG_TO_REG 0, %27, %subreg.sub_32bit 198 JMP_1 %bb.13, debug-location !9 199 200 bb.12: 201 successors: 202 203 204 bb.13: 205 successors: %bb.18(0x2aaaaaab), %bb.14(0x55555555) 206 207 %2:gr32 = PHI undef %35:gr32, %bb.11, %14, %bb.21 208 %3:gr64 = PHI %36, %bb.11, %13, %bb.21 209 %4:gr32 = PHI %0, %bb.11, %10, %bb.21, debug-instr-number 1 210 %5:gr32 = PHI undef %35:gr32, %bb.11, %9, %bb.21 211 DBG_INSTR_REF !10, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !9 212 %39:gr8 = COPY %27.sub_8bit 213 TEST8rr killed %39, %39, implicit-def $eflags, debug-location !9 214 JCC_1 %bb.18, 5, implicit killed $eflags, debug-location !9 215 JMP_1 %bb.14, debug-location !9 216 217 bb.14: 218 successors: %bb.17(0x40000001), %bb.15(0x3fffffff) 219 220 %41:gr8 = COPY %27.sub_8bit 221 TEST8rr killed %41, %41, implicit-def $eflags, debug-location !9 222 JCC_1 %bb.17, 5, implicit killed $eflags, debug-location !9 223 JMP_1 %bb.15, debug-location !9 224 225 bb.15: 226 227 bb.16: 228 %6:gr32 = nsw INC32r killed %4, implicit-def dead $eflags, debug-location !9 229 %48:gr32 = MOV32r0 implicit-def dead $eflags 230 JMP_1 %bb.21, debug-location !9 231 232 bb.17: 233 %7:gr32 = nsw INC32r killed %5, implicit-def dead $eflags, debug-location !9 234 %46:gr32 = MOV32r0 implicit-def dead $eflags 235 JMP_1 %bb.21, debug-location !9 236 237 bb.18: 238 successors: %bb.20(0x80000000), %bb.19(0x00000000) 239 240 TEST32rr %5, %5, implicit-def $eflags, debug-location !9 241 JCC_1 %bb.20, 15, implicit killed $eflags, debug-location !9 242 JMP_1 %bb.19, debug-location !9 243 244 bb.19: 245 successors: 246 247 248 bb.20: 249 %43:gr32 = nsw DEC32r %5, implicit-def dead $eflags, debug-location !9 250 %44:gr64_nosp = SUBREG_TO_REG 0, killed %43, %subreg.sub_32bit 251 ; Fiddled with to morph into llvm test, 252 %8:gr64 = LEA64r $noreg, 4, killed %44, @amd64_push_arguments, $noreg, debug-location !9 253 %42:gr32 = MOV32ri 8 254 JMP_1 %bb.21, debug-location !9 255 256 bb.21: 257 successors: %bb.13(0x7c000000), %bb.3(0x04000000) 258 259 %9:gr32 = PHI %5, %bb.20, %7, %bb.17, %5, %bb.16, debug-location !9 260 %10:gr32 = PHI %4, %bb.20, %4, %bb.17, %6, %bb.16, debug-location !9 261 %11:gr64 = PHI %8, %bb.20, undef %45:gr64, %bb.17, undef %47:gr64, %bb.16 262 %12:gr32 = PHI %42, %bb.20, %46, %bb.17, %48, %bb.16, debug-location !9 263 %49:gr32 = MOV32rm killed %11, 1, $noreg, 0, $noreg, debug-location !9 :: (load (s32) from `ptr undef`) 264 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 265 $rdi = COPY %50, debug-location !9 266 CALL64pcrel32 target-flags(x86-plt) &memcpy, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit undef $rsi, implicit undef $rdx, implicit-def $rsp, implicit-def $ssp, implicit-def dead $rax, debug-location !9 267 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 268 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 269 $rdi = COPY %15, debug-location !9 270 $esi = COPY killed %49, debug-location !9 271 $edx = COPY killed %12, debug-location !9 272 $ecx = COPY %54, debug-location !9 273 $r8 = COPY %50, debug-location !9 274 CALL64r undef %55:gr64, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $esi, implicit killed $edx, implicit killed $ecx, implicit killed $r8, implicit-def $rsp, implicit-def $ssp, debug-location !9 275 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !9 276 %13:gr64 = nuw nsw INC64r killed %3, implicit-def dead $eflags, debug-location !9 277 %14:gr32 = ADD32ri killed %2, -8, implicit-def dead $eflags, debug-location !9 278 CMP32ri %14, 8, implicit-def $eflags, debug-location !9 279 JCC_1 %bb.13, 15, implicit killed $eflags, debug-location !9 280 JMP_1 %bb.3, debug-location !9 281 282... 283