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1# RUN: llc -run-pass=livedebugvalues -o - %s | FileCheck %s2 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# else15# 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.value20# } 21# else22# m = inc(n); // var `m' doesn't has a dbg.value23# 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.ll27# then llc -stop-after stackmap-liveness live-debug-values.ll -o /dev/null > live-debug-values.mir28# This case will also produce multiple locations but only the debug range29# extension is tested here. This test case is tested with DWARF information under30# llvm/test/DebugInfo/live-debug-values.ll and present here for testing under31# MIR->MIR serialization.32 33# DBG_VALUE for variable "n" is extended into %bb.5 from its predecessors %bb.334# and %bb.4.35# CHECK: ![[N_VAR:[0-9]+]] = !DILocalVariable(name: "n",{{.*}})36#37# CHECK: bb.5.if.end.7:38# CHECK: DBG_VALUE $ebx, $noreg, ![[N_VAR]], !DIExpression()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 !1647 @.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 148 49 ; Function Attrs: nounwind uwtable50 define i32 @main(i32 %argc, ptr 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 !2153 tail call void @llvm.dbg.value(metadata ptr %argv, i64 0, metadata !13, metadata !20), !dbg !2254 %cmp = icmp eq i32 %argc, 2, !dbg !2455 br i1 %cmp, label %if.else, label %if.end, !dbg !2656 57 if.else: ; preds = %entry58 %arrayidx = getelementptr inbounds ptr, ptr %argv, i64 1, !dbg !2759 %0 = load ptr, ptr %arrayidx, align 8, !dbg !27, !tbaa !2860 %call = tail call i32 (ptr, ...) @atoi(ptr %0) #4, !dbg !3261 tail call void @llvm.dbg.value(metadata i32 %call, i64 0, metadata !14, metadata !20), !dbg !3362 br label %if.end63 64 if.end: ; preds = %if.else, %entry65 %n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ]66 %call1 = tail call i32 @change(i32 %n.0) #4, !dbg !3467 tail call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !14, metadata !20), !dbg !3368 %cmp2 = icmp sgt i32 %call1, 10, !dbg !3569 br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !3770 71 if.then.3: ; preds = %if.end72 %call4 = tail call i32 @modify(i32 %call1) #4, !dbg !3873 %add = add nsw i32 %call4, %call1, !dbg !4074 br label %if.end.7, !dbg !4175 76 if.else.5: ; preds = %if.end77 %call6 = tail call i32 @inc(i32 %call1) #4, !dbg !4278 br label %if.end.779 80 if.end.7: ; preds = %if.else.5, %if.then.381 %storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ]82 store i32 %storemerge, ptr @m, align 4, !dbg !43, !tbaa !4483 %call8 = tail call i32 (ptr, ...) @printf(ptr nonnull @.str, i32 %storemerge) #4, !dbg !4684 ret i32 0, !dbg !4785 }86 87 declare i32 @atoi(...) #188 89 declare i32 @change(i32) #190 91 declare i32 @modify(i32) #192 93 declare i32 @inc(i32) #194 95 ; Function Attrs: nounwind96 declare i32 @printf(ptr nocapture readonly, ...) #297 98 ; Function Attrs: nounwind readnone99 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3100 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: main162alignment: 16163exposesReturnsTwice: false164tracksRegLiveness: true165liveins: 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: false174 isReturnAddressTaken: false175 hasStackMap: false176 hasPatchPoint: false177 stackSize: 8178 offsetAdjustment: 0179 maxAlignment: 0180 adjustsStack: true181 hasCalls: true182 maxCallFrameSize: 0183 hasOpaqueSPAdjustment: false184 hasVAStart: false185 hasMustTailInVarArgFunc: false186fixedStack: 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, $rbx192 193 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp194 CFI_INSTRUCTION def_cfa_offset 16195 CFI_INSTRUCTION offset $rbx, -16196 DBG_VALUE $edi, _, !12, !20, debug-location !21197 DBG_VALUE $rsi, _, !13, !20, debug-location !22198 $eax = MOV32rr $edi199 DBG_VALUE $eax, _, !12, !20, debug-location !21200 $edi = MOV32ri 2201 CMP32ri8 killed $eax, 2, implicit-def $eflags, debug-location !26202 JCC_1 %bb.2.if.end, 5, implicit $eflags203 204 bb.1.if.else:205 successors: %bb.2.if.end(0)206 liveins: $rsi207 208 DBG_VALUE $rsi, _, !13, !20, debug-location !22209 $rdi = MOV64rm killed $rsi, 1, _, 8, _, debug-location !27 :: (load (s64) from %ir.arrayidx, !tbaa !28)210 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32211 CALL64pcrel32 @atoi, csr_64, implicit $rsp, implicit $rdi, implicit $al, implicit-def $rsp, implicit-def $eax, debug-location !32212 $edi = MOV32rr $eax, debug-location !32213 DBG_VALUE $edi, _, !14, !20, debug-location !33214 215 bb.2.if.end:216 successors: %bb.3.if.then.3(16), %bb.4.if.else.5(16)217 liveins: $edi218 219 CALL64pcrel32 @change, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !34220 $ebx = MOV32rr $eax, debug-location !34221 DBG_VALUE $ebx, _, !14, !20, debug-location !33222 CMP32ri8 $ebx, 11, implicit-def $eflags, debug-location !37223 JCC_1 %bb.4.if.else.5, 12, implicit killed $eflags, debug-location !37224 225 bb.3.if.then.3:226 successors: %bb.5.if.end.7(0)227 liveins: $ebx228 229 DBG_VALUE $ebx, _, !14, !20, debug-location !33230 $edi = MOV32rr $ebx, debug-location !38231 CALL64pcrel32 @modify, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !38232 $ecx = MOV32rr $eax, debug-location !38233 $ecx = ADD32rr killed $ecx, killed $ebx, implicit-def dead $eflags, debug-location !40234 JMP_1 %bb.5.if.end.7235 236 bb.4.if.else.5:237 successors: %bb.5.if.end.7(0)238 liveins: $ebx239 240 DBG_VALUE $ebx, _, !14, !20, debug-location !33241 $edi = MOV32rr killed $ebx, debug-location !42242 CALL64pcrel32 @inc, csr_64, implicit $rsp, implicit $edi, implicit-def $rsp, implicit-def $eax, debug-location !42243 $ecx = MOV32rr $eax, debug-location !42244 245 bb.5.if.end.7:246 liveins: $ecx247 248 MOV32mr $rip, 1, _, @m, _, $ecx, debug-location !43 :: (store (s32) into @m, !tbaa !44)249 dead $edi = MOV32ri @.str, implicit-def $rdi, debug-location !46250 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !47251 $esi = MOV32rr killed $ecx, debug-location !46252 CALL64pcrel32 @printf, csr_64, implicit $rsp, implicit $rdi, implicit $esi, implicit $al, implicit-def $rsp, implicit-def dead $eax, debug-location !46253 $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, debug-location !47254 $rbx = POP64r implicit-def $rsp, implicit $rsp, debug-location !47255 RET64 $eax, debug-location !47256 257...258