1# RUN: llc -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s 2 3# Test the extension of debug ranges from predecessors. 4# Generated from the source file LiveDebugValues.c: 5# #include <stdio.h> 6# int m; 7# extern int inc(int n); 8# extern int change(int n); 9# extern int modify(int n); 10# int main(int argc, char **argv) { 11# int n; 12# if (argc != 2) 13# n = 2; 14# else 15# n = atoi(argv[1]); 16# n = change(n); 17# if (n > 10) { 18# m = modify(n); 19# m = m + n; // var `m' doesn't has a dbg.value 20# } 21# else 22# m = inc(n); // var `m' doesn't has a dbg.value 23# printf("m(main): %d\n", m); 24# return 0; 25# } 26# with clang -g -O3 -c -emit-llvm LiveDebugValues.c -S -o live-debug-values.ll 27# then llc -stop-after stackmap-liveness live-debug-values.ll -o /dev/null > live-debug-values.mir 28# This case will also produce multiple locations but only the debug range 29# extension is tested here. This test case is tested with DWARF information under 30# llvm/test/DebugInfo/live-debug-values.ll and present here for testing under 31# MIR->MIR serialization. 32 33# DBG_VALUE for variable "n" is extended into %bb.5 from its predecessors %bb.3 34# and %bb.4. 35# CHECK: ![[N_VAR:[0-9]+]] = !DILocalVariable(name: "n",{{.*}}) 36# 37# CHECK: bb.5.if.end.7: 38# CHECK: DBG_VALUE debug-use $ebx, debug-use $noreg, ![[N_VAR]], !DIExpression(), debug-location !{{[0-9]+}} 39 40 41--- | 42 ; ModuleID = 'live-debug-values.ll' 43 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 44 target triple = "x86_64-unknown-linux-gnu" 45 46 @m = common global i32 0, align 4, !dbg !16 47 @.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 1 48 49 ; Function Attrs: nounwind uwtable 50 define i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 !dbg !4 { 51 entry: 52 tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !12, metadata !20), !dbg !21 53 tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !13, metadata !20), !dbg !22 54 %cmp = icmp eq i32 %argc, 2, !dbg !24 55 br i1 %cmp, label %if.else, label %if.end, !dbg !26 56 57 if.else: ; preds = %entry 58 %arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !27 59 %0 = load i8*, i8** %arrayidx, align 8, !dbg !27, !tbaa !28 60 %call = tail call i32 (i8*, ...) bitcast (i32 (...)* @atoi to i32 (i8*, ...)*)(i8* %0) #4, !dbg !32 61 tail call void @llvm.dbg.value(metadata i32 %call, i64 0, metadata !14, metadata !20), !dbg !33 62 br label %if.end 63 64 if.end: ; preds = %if.else, %entry 65 %n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ] 66 %call1 = tail call i32 @change(i32 %n.0) #4, !dbg !34 67 tail call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !14, metadata !20), !dbg !33 68 %cmp2 = icmp sgt i32 %call1, 10, !dbg !35 69 br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !37 70 71 if.then.3: ; preds = %if.end 72 %call4 = tail call i32 @modify(i32 %call1) #4, !dbg !38 73 %add = add nsw i32 %call4, %call1, !dbg !40 74 br label %if.end.7, !dbg !41 75 76 if.else.5: ; preds = %if.end 77 %call6 = tail call i32 @inc(i32 %call1) #4, !dbg !42 78 br label %if.end.7 79 80 if.end.7: ; preds = %if.else.5, %if.then.3 81 %storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ] 82 store i32 %storemerge, i32* @m, align 4, !dbg !43, !tbaa !44 83 %call8 = tail call i32 (i8*, ...) @printf(i8* nonnull getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %storemerge) #4, !dbg !46 84 ret i32 0, !dbg !47 85 } 86 87 declare i32 @atoi(...) #1 88 89 declare i32 @change(i32) #1 90 91 declare i32 @modify(i32) #1 92 93 declare i32 @inc(i32) #1 94 95 ; Function Attrs: nounwind 96 declare i32 @printf(i8* nocapture readonly, ...) #2 97 98 ; Function Attrs: nounwind readnone 99 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3 100 101 attributes #0 = { nounwind uwtable } 102 attributes #1 = { nounwind } 103 attributes #2 = { nounwind } 104 attributes #3 = { nounwind readnone } 105 attributes #4 = { nounwind } 106 107 !llvm.dbg.cu = !{!0} 108 !llvm.module.flags = !{!17, !18} 109 !llvm.ident = !{!19} 110 111 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 253049) ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !15) 112 !1 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram") 113 !2 = !{} 114 !4 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 6, type: !5, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11) 115 !5 = !DISubroutineType(types: !6) 116 !6 = !{!7, !7, !8} 117 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 118 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, align: 64) 119 !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64) 120 !10 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 121 !11 = !{!12, !13, !14} 122 !12 = !DILocalVariable(name: "argc", arg: 1, scope: !4, file: !1, line: 6, type: !7) 123 !13 = !DILocalVariable(name: "argv", arg: 2, scope: !4, file: !1, line: 6, type: !8) 124 !14 = !DILocalVariable(name: "n", scope: !4, file: !1, line: 7, type: !7) 125 !15 = !{!16} 126 !16 = !DIGlobalVariableExpression(var: !DIGlobalVariable(name: "m", scope: !0, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true), expr: !DIExpression()) 127 !17 = !{i32 2, !"Dwarf Version", i32 4} 128 !18 = !{i32 2, !"Debug Info Version", i32 3} 129 !19 = !{!"clang version 3.8.0 (trunk 253049)"} 130 !20 = !DIExpression() 131 !21 = !DILocation(line: 6, column: 14, scope: !4) 132 !22 = !DILocation(line: 6, column: 27, scope: !23) 133 !23 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 1) 134 !24 = !DILocation(line: 8, column: 12, scope: !25) 135 !25 = distinct !DILexicalBlock(scope: !4, file: !1, line: 8, column: 7) 136 !26 = !DILocation(line: 8, column: 7, scope: !4) 137 !27 = !DILocation(line: 11, column: 14, scope: !25) 138 !28 = !{!29, !29, i64 0} 139 !29 = !{!"any pointer", !30, i64 0} 140 !30 = !{!"omnipotent char", !31, i64 0} 141 !31 = !{!"Simple C/C++ TBAA"} 142 !32 = !DILocation(line: 11, column: 9, scope: !25) 143 !33 = !DILocation(line: 7, column: 7, scope: !23) 144 !34 = !DILocation(line: 12, column: 7, scope: !4) 145 !35 = !DILocation(line: 13, column: 9, scope: !36) 146 !36 = distinct !DILexicalBlock(scope: !4, file: !1, line: 13, column: 7) 147 !37 = !DILocation(line: 13, column: 7, scope: !4) 148 !38 = !DILocation(line: 14, column: 9, scope: !39) 149 !39 = distinct !DILexicalBlock(scope: !36, file: !1, line: 13, column: 15) 150 !40 = !DILocation(line: 15, column: 11, scope: !39) 151 !41 = !DILocation(line: 16, column: 3, scope: !39) 152 !42 = !DILocation(line: 18, column: 9, scope: !36) 153 !43 = !DILocation(line: 15, column: 7, scope: !39) 154 !44 = !{!45, !45, i64 0} 155 !45 = !{!"int", !30, i64 0} 156 !46 = !DILocation(line: 19, column: 3, scope: !4) 157 !47 = !DILocation(line: 20, column: 3, scope: !4) 158 159... 160--- 161name: main 162alignment: 4 163exposesReturnsTwice: false 164tracksRegLiveness: true 165liveins: 166 - { reg: '$edi' } 167 - { reg: '$rsi' } 168calleeSavedRegisters: [ '$bh', '$bl', '$bp', '$bpl', '$bx', '$ebp', '$ebx', 169 '$rbp', '$rbx', '$r12', '$r13', '$r14', '$r15', 170 '$r12b', '$r13b', '$r14b', '$r15b', '$r12d', '$r13d', 171 '$r14d', '$r15d', '$r12w', '$r13w', '$r14w', '$r15w' ] 172frameInfo: 173 isFrameAddressTaken: false 174 isReturnAddressTaken: false 175 hasStackMap: false 176 hasPatchPoint: false 177 stackSize: 8 178 offsetAdjustment: 0 179 maxAlignment: 0 180 adjustsStack: true 181 hasCalls: true 182 maxCallFrameSize: 0 183 hasOpaqueSPAdjustment: false 184 hasVAStart: false 185 hasMustTailInVarArgFunc: false 186fixedStack: 187 - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$rbx' } 188body: | 189 bb.0.entry: 190 successors: %bb.1.if.else(16), %bb.2.if.end(16) 191 liveins: $edi, $rsi, $rbx 192 193 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp 194 CFI_INSTRUCTION def_cfa_offset 16 195 CFI_INSTRUCTION offset $rbx, -16 196 DBG_VALUE debug-use $edi, debug-use _, !12, !20, debug-location !21 197 DBG_VALUE debug-use $rsi, debug-use _, !13, !20, debug-location !22 198 $eax = MOV32rr $edi 199 DBG_VALUE debug-use $eax, debug-use _, !12, !20, debug-location !21 200 $edi = MOV32ri 2 201 CMP32ri8 killed $eax, 2, implicit-def $eflags, debug-location !26 202 JNE_1 %bb.2.if.end, implicit $eflags 203 204 bb.1.if.else: 205 successors: %bb.2.if.end(0) 206 liveins: $rsi 207 208 DBG_VALUE debug-use $rsi, debug-use _, !13, !20, debug-location !22 209 $rdi = MOV64rm killed $rsi, 1, _, 8, _, debug-location !27 :: (load 8 from %ir.arrayidx, !tbaa !28) 210 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32 211 CALL64pcrel32 @atoi, csr_64, implicit $rsp, implicit $rdi, implicit $al, implicit-def $rsp, implicit-def $eax, debug-location !32 212 $edi = MOV32rr $eax, debug-location !32 213 DBG_VALUE debug-use $edi, debug-use _, !14, !20, debug-location !33 214 215 bb.2.if.end: 216 successors: %bb.3.if.then.3(16), %bb.4.if.else.5(16) 217 liveins: $edi 218 219 CALL64pcrel32 @change, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !34 220 $ebx = MOV32rr $eax, debug-location !34 221 DBG_VALUE debug-use $ebx, debug-use _, !14, !20, debug-location !33 222 CMP32ri8 $ebx, 11, implicit-def $eflags, debug-location !37 223 JL_1 %bb.4.if.else.5, implicit killed $eflags, debug-location !37 224 225 bb.3.if.then.3: 226 successors: %bb.5.if.end.7(0) 227 liveins: $ebx 228 229 DBG_VALUE debug-use $ebx, debug-use _, !14, !20, debug-location !33 230 $edi = MOV32rr $ebx, debug-location !38 231 CALL64pcrel32 @modify, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !38 232 $ecx = MOV32rr $eax, debug-location !38 233 $ecx = ADD32rr killed $ecx, killed $ebx, implicit-def dead $eflags, debug-location !40 234 JMP_1 %bb.5.if.end.7 235 236 bb.4.if.else.5: 237 successors: %bb.5.if.end.7(0) 238 liveins: $ebx 239 240 DBG_VALUE debug-use $ebx, debug-use _, !14, !20, debug-location !33 241 $edi = MOV32rr killed $ebx, debug-location !42 242 CALL64pcrel32 @inc, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !42 243 $ecx = MOV32rr $eax, debug-location !42 244 245 bb.5.if.end.7: 246 liveins: $ecx 247 248 MOV32mr $rip, 1, _, @m, _, $ecx, debug-location !43 :: (store 4 into @m, !tbaa !44) 249 dead undef $edi = MOV32ri64 @.str, implicit-def $rdi, debug-location !46 250 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !47 251 $esi = MOV32rr killed $ecx, debug-location !46 252 CALL64pcrel32 @printf, csr_64, implicit $rsp, implicit $rdi, implicit $esi, implicit $al, implicit-def $rsp, implicit-def dead $eax, debug-location !46 253 $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, debug-location !47 254 $rbx = POP64r implicit-def $rsp, implicit $rsp, debug-location !47 255 RETQ $eax, debug-location !47 256 257... 258