1# RUN: llc %s -o - -experimental-debug-variable-locations=true \ 2# RUN: -run-pass=livedebugvalues | \ 3# RUN: FileCheck %s --implicit-check-not=DBG_VALUE 4# 5## Check that LiveDebugValues can track and join DBG_INSTR_REFs that use 6## registers, stack slots, and constants in a single instruction. 7# 8# CHECK: ![[VAR_D:[0-9]+]] = !DILocalVariable(name: "d" 9 10# CHECK-LABEL: bb.0.entry 11# 12## Value at end of first block should use the registers given by DBG_PHI, and 13## fold the offset+deref from stack slot [$rsp+12] into the expression. 14# CHECK: DBG_VALUE_LIST ![[VAR_D]] 15# CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 12, DW_OP_deref, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value) 16# CHECK-SAME: $ebp, $rsp, $ebx, 6 17 18# CHECK-LABEL: bb.1.while.body 19# 20## Prior DBG_VALUE_LIST should be live-in to this bb.1. 21# CHECK: DBG_VALUE_LIST ![[VAR_D]] 22# CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 12, DW_OP_deref, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value) 23# CHECK-SAME: $ebp, $rsp, $ebx, 6 24# 25## When $ebp is spilled to a stack slot, a new debug value using the stack slot 26## should be inserted. 27# CHECK: MOV32mr $rsp, {{.+}} $ebp 28# CHECK-NEXT: DBG_VALUE_LIST ![[VAR_D]] 29# CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 16, DW_OP_deref, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 12, DW_OP_deref, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value) 30# CHECK-SAME: $rsp, $rsp, $ebx, 6 31# 32## Similarly produce a new debug value when $ebx is spilled. 33# CHECK: MOV32mr $rsp, {{.+}} $ebx 34# CHECK-NEXT: DBG_VALUE_LIST ![[VAR_D]] 35# CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 16, DW_OP_deref, DW_OP_LLVM_arg, 2, DW_OP_plus_uconst, 20, DW_OP_deref, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 12, DW_OP_deref, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value) 36# CHECK-SAME: $rsp, $rsp, $rsp, 6 37# 38## When the value in the stack slot is restored and then that slot is clobbered, the debug value should use the restored register. 39# CHECK: MOV32mi $rsp 40# CHECK-NEXT: DBG_VALUE_LIST ![[VAR_D]] 41# CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 16, DW_OP_deref, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 12, DW_OP_deref, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value) 42# CHECK-SAME: $rsp, $rsp, $ebx, 6 43# 44## Repeat for the next stack slot that gets restored and then clobbered. 45# CHECK: MOV32mi $rsp 46# CHECK-NEXT: DBG_VALUE_LIST ![[VAR_D]] 47# CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 12, DW_OP_deref, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value) 48# CHECK-SAME: $ebp, $rsp, $ebx, 6 49# 50## TODO: The debug value range should be terminated when the value in $ebx is clobbered. 51# 52## At the end of the block a new DBG_INSTR_REF begins a new range. 53# CHECK: DBG_VALUE_LIST ![[VAR_D]] 54# CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 12, DW_OP_deref, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value) 55# CHECK-SAME: $ebp, $rsp, $ebx, 6 56 57# CHECK-LABEL: bb.2.while.end 58# 59## Finally, the two entry debug values should be joined, as they have identical 60## expressions, their respective stack slots and constants are identical, and 61## the remaining operands occupy the same registers out of each block. 62# CHECK: DBG_VALUE_LIST ![[VAR_D]] 63# CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 12, DW_OP_deref, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value) 64# CHECK-SAME: $ebp, $rsp, $ebx, 6 65 66 67--- | 68 69 ; ModuleID = 'test.ll' 70 source_filename = "test.cpp" 71 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 72 target triple = "x86_64-unknown-linux-gnu" 73 74 ; Function Attrs: mustprogress uwtable 75 define dso_local noundef i32 @_Z3fooii(i32 noundef %a, i32 noundef %b) local_unnamed_addr !dbg !9 { 76 entry: 77 %call = tail call noundef i32 @_Z3bazv(), !dbg !18 78 call void @llvm.dbg.value(metadata !DIArgList(i32 %a, i32 %call, i32 %b), metadata !17, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_constu, 6, DW_OP_minus, DW_OP_stack_value)), !dbg !19 79 %cmp19 = icmp sgt i32 %b, %a, !dbg !20 80 br i1 %cmp19, label %while.body.preheader, label %while.end, !dbg !21 81 82 while.body.preheader: ; preds = %entry 83 br label %while.body, !dbg !21 84 85 while.body: ; preds = %while.body.preheader, %while.body 86 %a.addr.021 = phi i32 [ %mul3, %while.body ], [ %a, %while.body.preheader ] 87 %b.addr.020 = phi i32 [ %add2, %while.body ], [ %b, %while.body.preheader ] 88 %call1 = tail call noundef i32 @_Z3bazv(), !dbg !22 89 tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() #3, !dbg !24, !srcloc !25 90 %add2 = add i32 %b.addr.020, 2, !dbg !26 91 %mul3 = shl nsw i32 %a.addr.021, 1, !dbg !27 92 call void @llvm.dbg.value(metadata !DIArgList(i32 %mul3, i32 %call, i32 %add2), metadata !17, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_constu, 6, DW_OP_minus, DW_OP_stack_value)), !dbg !19 93 %cmp = icmp sgt i32 %add2, %mul3, !dbg !20 94 br i1 %cmp, label %while.body, label %while.end, !dbg !21, !llvm.loop !28 95 96 while.end: ; preds = %while.body, %entry 97 %b.addr.0.lcssa = phi i32 [ %b, %entry ], [ %add2, %while.body ] 98 %a.addr.0.lcssa = phi i32 [ %a, %entry ], [ %mul3, %while.body ] 99 %add7 = sub i32 %b.addr.0.lcssa, %call, !dbg !31 100 %sub8 = add i32 %add7, %a.addr.0.lcssa, !dbg !32 101 ret i32 %sub8, !dbg !33 102 } 103 104 declare !dbg !34 noundef i32 @_Z3bazv() local_unnamed_addr 105 106 ; Function Attrs: nocallback nofree nosync nounwind readnone speculatable willreturn 107 declare void @llvm.dbg.value(metadata, metadata, metadata) 108 109 !llvm.dbg.cu = !{!0} 110 !llvm.module.flags = !{!2, !3, !4, !5, !6, !7} 111 !llvm.ident = !{!8} 112 113 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 16.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None) 114 !1 = !DIFile(filename: "test.cpp", directory: "/") 115 !2 = !{i32 7, !"Dwarf Version", i32 5} 116 !3 = !{i32 2, !"Debug Info Version", i32 3} 117 !4 = !{i32 1, !"wchar_size", i32 4} 118 !5 = !{i32 8, !"PIC Level", i32 2} 119 !6 = !{i32 7, !"PIE Level", i32 2} 120 !7 = !{i32 7, !"uwtable", i32 2} 121 !8 = !{!"clang version 16.0.0"} 122 !9 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooii", scope: !1, file: !1, line: 3, type: !10, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !13) 123 !10 = !DISubroutineType(types: !11) 124 !11 = !{!12, !12, !12} 125 !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 126 !13 = !{!14, !15, !16, !17} 127 !14 = !DILocalVariable(name: "a", arg: 1, scope: !9, file: !1, line: 3, type: !12) 128 !15 = !DILocalVariable(name: "b", arg: 2, scope: !9, file: !1, line: 3, type: !12) 129 !16 = !DILocalVariable(name: "c", scope: !9, file: !1, line: 4, type: !12) 130 !17 = !DILocalVariable(name: "d", scope: !9, file: !1, line: 5, type: !12) 131 !18 = !DILocation(line: 4, column: 11, scope: !9) 132 !19 = !DILocation(line: 0, scope: !9) 133 !20 = !DILocation(line: 6, column: 12, scope: !9) 134 !21 = !DILocation(line: 6, column: 3, scope: !9) 135 !22 = !DILocation(line: 7, column: 5, scope: !23) 136 !23 = distinct !DILexicalBlock(scope: !9, file: !1, line: 6, column: 17) 137 !24 = !DILocation(line: 9, column: 5, scope: !23) 138 !25 = !{i64 129} 139 !26 = !DILocation(line: 8, column: 7, scope: !23) 140 !27 = !DILocation(line: 10, column: 7, scope: !23) 141 !28 = distinct !{!28, !21, !29, !30} 142 !29 = !DILocation(line: 12, column: 3, scope: !9) 143 !30 = !{!"llvm.loop.mustprogress"} 144 !31 = !DILocation(line: 13, column: 12, scope: !9) 145 !32 = !DILocation(line: 13, column: 16, scope: !9) 146 !33 = !DILocation(line: 13, column: 3, scope: !9) 147 !34 = !DISubprogram(name: "baz", linkageName: "_Z3bazv", scope: !1, file: !1, line: 1, type: !35, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !37) 148 !35 = !DISubroutineType(types: !36) 149 !36 = !{!12} 150 !37 = !{} 151 152... 153--- 154name: _Z3fooii 155alignment: 16 156tracksRegLiveness: true 157tracksDebugUserValues: true 158debugInstrRef: true 159registers: [] 160liveins: 161 - { reg: '$edi', virtual-reg: '' } 162 - { reg: '$esi', virtual-reg: '' } 163frameInfo: 164 stackSize: 72 165 offsetAdjustment: -72 166 maxAlignment: 4 167 adjustsStack: true 168 hasCalls: true 169 stackProtector: '' 170 functionContext: '' 171 cvBytesOfCalleeSavedRegisters: 48 172 savePoint: '' 173 restorePoint: '' 174fixedStack: 175 - { id: 0, type: spill-slot, offset: -56, size: 8, alignment: 8, stack-id: default, 176 callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '', 177 debug-info-expression: '', debug-info-location: '' } 178 - { id: 1, type: spill-slot, offset: -48, size: 8, alignment: 16, stack-id: default, 179 callee-saved-register: '$r12', callee-saved-restored: true, debug-info-variable: '', 180 debug-info-expression: '', debug-info-location: '' } 181 - { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default, 182 callee-saved-register: '$r13', callee-saved-restored: true, debug-info-variable: '', 183 debug-info-expression: '', debug-info-location: '' } 184 - { id: 3, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: default, 185 callee-saved-register: '$r14', callee-saved-restored: true, debug-info-variable: '', 186 debug-info-expression: '', debug-info-location: '' } 187 - { id: 4, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default, 188 callee-saved-register: '$r15', callee-saved-restored: true, debug-info-variable: '', 189 debug-info-expression: '', debug-info-location: '' } 190 - { id: 5, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default, 191 callee-saved-register: '$rbp', callee-saved-restored: true, debug-info-variable: '', 192 debug-info-expression: '', debug-info-location: '' } 193stack: 194 - { id: 0, name: '', type: spill-slot, offset: -60, size: 4, alignment: 4, 195 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 196 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 197 - { id: 1, name: '', type: spill-slot, offset: -64, size: 4, alignment: 4, 198 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 199 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 200 - { id: 2, name: '', type: spill-slot, offset: -68, size: 4, alignment: 4, 201 stack-id: default, callee-saved-register: '', callee-saved-restored: true, 202 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } 203callSites: [] 204debugValueSubstitutions: [] 205constants: [] 206machineFunctionInfo: {} 207body: | 208 bb.0.entry: 209 successors: %bb.1(0x78e38e39), %bb.3(0x071c71c7) 210 liveins: $edi, $esi, $rbp, $r15, $r14, $r13, $r12, $rbx 211 212 frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp 213 frame-setup CFI_INSTRUCTION def_cfa_offset 16 214 frame-setup PUSH64r killed $r15, implicit-def $rsp, implicit $rsp 215 frame-setup CFI_INSTRUCTION def_cfa_offset 24 216 frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp 217 frame-setup CFI_INSTRUCTION def_cfa_offset 32 218 frame-setup PUSH64r killed $r13, implicit-def $rsp, implicit $rsp 219 frame-setup CFI_INSTRUCTION def_cfa_offset 40 220 frame-setup PUSH64r killed $r12, implicit-def $rsp, implicit $rsp 221 frame-setup CFI_INSTRUCTION def_cfa_offset 48 222 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp 223 frame-setup CFI_INSTRUCTION def_cfa_offset 56 224 $rsp = frame-setup SUB64ri8 $rsp, 24, implicit-def dead $eflags 225 frame-setup CFI_INSTRUCTION def_cfa_offset 80 226 CFI_INSTRUCTION offset $rbx, -56 227 CFI_INSTRUCTION offset $r12, -48 228 CFI_INSTRUCTION offset $r13, -40 229 CFI_INSTRUCTION offset $r14, -32 230 CFI_INSTRUCTION offset $r15, -24 231 CFI_INSTRUCTION offset $rbp, -16 232 DBG_PHI $esi, 5 233 DBG_PHI $edi, 3 234 $ebx = MOV32rr $esi 235 $ebp = MOV32rr $edi 236 CALL64pcrel32 target-flags(x86-plt) @_Z3bazv, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-instr-number 4, debug-location !18 237 MOV32mr $rsp, 1, $noreg, 12, $noreg, $eax :: (store (s32) into %stack.2) 238 DBG_INSTR_REF !17, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value), dbg-instr-ref(3, 0), dbg-instr-ref(4, 6), dbg-instr-ref(5, 0), 6, debug-location !19 239 CMP32rr renamable $ebx, renamable $ebp, implicit-def $eflags, debug-location !20 240 JCC_1 %bb.3, 14, implicit $eflags, debug-location !21 241 242 bb.1.while.body (align 16): 243 successors: %bb.1(0x78e38e39), %bb.3(0x071c71c7) 244 liveins: $ebp, $ebx 245 246 MOV32mr $rsp, 1, $noreg, 16, $noreg, killed renamable $ebp :: (store (s32) into %stack.1) 247 MOV32mr $rsp, 1, $noreg, 20, $noreg, killed renamable $ebx :: (store (s32) into %stack.0) 248 CALL64pcrel32 target-flags(x86-plt) @_Z3bazv, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax, debug-location !22 249 INLINEASM &"", 1 /* sideeffect attdialect */, 12 /* clobber */, implicit-def dead early-clobber $rax, 12 /* clobber */, implicit-def dead early-clobber $rbx, 12 /* clobber */, implicit-def dead early-clobber $rcx, 12 /* clobber */, implicit-def dead early-clobber $rdx, 12 /* clobber */, implicit-def dead early-clobber $rsi, 12 /* clobber */, implicit-def dead early-clobber $rdi, 12 /* clobber */, implicit-def dead early-clobber $rbp, 12 /* clobber */, implicit-def dead early-clobber $r8, 12 /* clobber */, implicit-def dead early-clobber $r9, 12 /* clobber */, implicit-def dead early-clobber $r10, 12 /* clobber */, implicit-def dead early-clobber $r11, 12 /* clobber */, implicit-def dead early-clobber $r12, 12 /* clobber */, implicit-def dead early-clobber $r13, 12 /* clobber */, implicit-def dead early-clobber $r14, 12 /* clobber */, implicit-def dead early-clobber $r15, 12 /* clobber */, implicit-def dead early-clobber $df, 12 /* clobber */, implicit-def early-clobber $fpsw, 12 /* clobber */, implicit-def dead early-clobber $eflags, !25, debug-location !24 250 renamable $ebp = MOV32rm $rsp, 1, $noreg, 16, $noreg :: (load (s32) from %stack.1) 251 renamable $ebx = MOV32rm $rsp, 1, $noreg, 20, $noreg :: (load (s32) from %stack.0) 252 MOV32mi $rsp, 1, $noreg, 20, $noreg, 0 :: (store (s32) into %stack.0) 253 MOV32mi $rsp, 1, $noreg, 16, $noreg, 0 :: (store (s32) into %stack.1) 254 renamable $ebx = ADD32ri8 killed renamable $ebx, 2, implicit-def dead $eflags, debug-instr-number 2, debug-location !26 255 renamable $ebp = nsw ADD32rr killed renamable $ebp, renamable $ebp, implicit-def dead $eflags, debug-instr-number 1, debug-location !27 256 DBG_INSTR_REF !17, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 2, DW_OP_mul, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_LLVM_arg, 3, DW_OP_minus, DW_OP_stack_value), dbg-instr-ref(1, 0), dbg-instr-ref(4, 6), dbg-instr-ref(2, 0), 6, debug-location !19 257 CMP32rr renamable $ebx, renamable $ebp, implicit-def $eflags, debug-location !20 258 JCC_1 %bb.1, 15, implicit $eflags, debug-location !21 259 260 bb.3.while.end: 261 liveins: $ebp, $ebx 262 263 renamable $ebx = SUB32rm killed renamable $ebx, $rsp, 1, $noreg, 12, $noreg, implicit-def dead $eflags, debug-location !31 :: (load (s32) from %stack.2) 264 renamable $ebx = ADD32rr killed renamable $ebx, killed renamable $ebp, implicit-def dead $eflags, debug-location !32 265 $eax = MOV32rr killed $ebx, debug-location !33 266 $rsp = frame-destroy ADD64ri8 $rsp, 24, implicit-def dead $eflags, debug-location !33 267 frame-destroy CFI_INSTRUCTION def_cfa_offset 56, debug-location !33 268 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33 269 frame-destroy CFI_INSTRUCTION def_cfa_offset 48, debug-location !33 270 $r12 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33 271 frame-destroy CFI_INSTRUCTION def_cfa_offset 40, debug-location !33 272 $r13 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33 273 frame-destroy CFI_INSTRUCTION def_cfa_offset 32, debug-location !33 274 $r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33 275 frame-destroy CFI_INSTRUCTION def_cfa_offset 24, debug-location !33 276 $r15 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33 277 frame-destroy CFI_INSTRUCTION def_cfa_offset 16, debug-location !33 278 $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33 279 frame-destroy CFI_INSTRUCTION def_cfa_offset 8, debug-location !33 280 RET64 $eax, debug-location !33 281 282... 283