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: bb.5.if.end.7: 36 # CHECK: DBG_VALUE debug-use %ebx, debug-use _, !18, !19, debug-location !32 37 38 39 --- | 40 ; ModuleID = 'live-debug-values.ll' 41 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 42 target triple = "x86_64-unknown-linux-gnu" 43 44 @m = common global i32 0, align 4 45 @.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 1 46 47 ; Function Attrs: nounwind uwtable 48 define i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 !dbg !4 { 49 entry: 50 tail call void @llvm.dbg.value(metadata i32 %argc, i64 0, metadata !12, metadata !20), !dbg !21 51 tail call void @llvm.dbg.value(metadata i8** %argv, i64 0, metadata !13, metadata !20), !dbg !22 52 %cmp = icmp eq i32 %argc, 2, !dbg !24 53 br i1 %cmp, label %if.else, label %if.end, !dbg !26 54 55 if.else: ; preds = %entry 56 %arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !27 57 %0 = load i8*, i8** %arrayidx, align 8, !dbg !27, !tbaa !28 58 %call = tail call i32 (i8*, ...) bitcast (i32 (...)* @atoi to i32 (i8*, ...)*)(i8* %0) #4, !dbg !32 59 tail call void @llvm.dbg.value(metadata i32 %call, i64 0, metadata !14, metadata !20), !dbg !33 60 br label %if.end 61 62 if.end: ; preds = %if.else, %entry 63 %n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ] 64 %call1 = tail call i32 @change(i32 %n.0) #4, !dbg !34 65 tail call void @llvm.dbg.value(metadata i32 %call1, i64 0, metadata !14, metadata !20), !dbg !33 66 %cmp2 = icmp sgt i32 %call1, 10, !dbg !35 67 br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !37 68 69 if.then.3: ; preds = %if.end 70 %call4 = tail call i32 @modify(i32 %call1) #4, !dbg !38 71 %add = add nsw i32 %call4, %call1, !dbg !40 72 br label %if.end.7, !dbg !41 73 74 if.else.5: ; preds = %if.end 75 %call6 = tail call i32 @inc(i32 %call1) #4, !dbg !42 76 br label %if.end.7 77 78 if.end.7: ; preds = %if.else.5, %if.then.3 79 %storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ] 80 store i32 %storemerge, i32* @m, align 4, !dbg !43, !tbaa !44 81 %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 82 ret i32 0, !dbg !47 83 } 84 85 declare i32 @atoi(...) #1 86 87 declare i32 @change(i32) #1 88 89 declare i32 @modify(i32) #1 90 91 declare i32 @inc(i32) #1 92 93 ; Function Attrs: nounwind 94 declare i32 @printf(i8* nocapture readonly, ...) #2 95 96 ; Function Attrs: nounwind readnone 97 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3 98 99 attributes #0 = { nounwind uwtable } 100 attributes #1 = { nounwind } 101 attributes #2 = { nounwind } 102 attributes #3 = { nounwind readnone } 103 attributes #4 = { nounwind } 104 105 !llvm.dbg.cu = !{!0} 106 !llvm.module.flags = !{!17, !18} 107 !llvm.ident = !{!19} 108 109 !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) 110 !1 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram") 111 !2 = !{} 112 !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, variables: !11) 113 !5 = !DISubroutineType(types: !6) 114 !6 = !{!7, !7, !8} 115 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 116 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, align: 64) 117 !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, align: 64) 118 !10 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) 119 !11 = !{!12, !13, !14} 120 !12 = !DILocalVariable(name: "argc", arg: 1, scope: !4, file: !1, line: 6, type: !7) 121 !13 = !DILocalVariable(name: "argv", arg: 2, scope: !4, file: !1, line: 6, type: !8) 122 !14 = !DILocalVariable(name: "n", scope: !4, file: !1, line: 7, type: !7) 123 !15 = !{!16} 124 !16 = !DIGlobalVariable(name: "m", scope: !0, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, variable: i32* @m) 125 !17 = !{i32 2, !"Dwarf Version", i32 4} 126 !18 = !{i32 2, !"Debug Info Version", i32 3} 127 !19 = !{!"clang version 3.8.0 (trunk 253049)"} 128 !20 = !DIExpression() 129 !21 = !DILocation(line: 6, column: 14, scope: !4) 130 !22 = !DILocation(line: 6, column: 27, scope: !23) 131 !23 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 1) 132 !24 = !DILocation(line: 8, column: 12, scope: !25) 133 !25 = distinct !DILexicalBlock(scope: !4, file: !1, line: 8, column: 7) 134 !26 = !DILocation(line: 8, column: 7, scope: !4) 135 !27 = !DILocation(line: 11, column: 14, scope: !25) 136 !28 = !{!29, !29, i64 0} 137 !29 = !{!"any pointer", !30, i64 0} 138 !30 = !{!"omnipotent char", !31, i64 0} 139 !31 = !{!"Simple C/C++ TBAA"} 140 !32 = !DILocation(line: 11, column: 9, scope: !25) 141 !33 = !DILocation(line: 7, column: 7, scope: !23) 142 !34 = !DILocation(line: 12, column: 7, scope: !4) 143 !35 = !DILocation(line: 13, column: 9, scope: !36) 144 !36 = distinct !DILexicalBlock(scope: !4, file: !1, line: 13, column: 7) 145 !37 = !DILocation(line: 13, column: 7, scope: !4) 146 !38 = !DILocation(line: 14, column: 9, scope: !39) 147 !39 = distinct !DILexicalBlock(scope: !36, file: !1, line: 13, column: 15) 148 !40 = !DILocation(line: 15, column: 11, scope: !39) 149 !41 = !DILocation(line: 16, column: 3, scope: !39) 150 !42 = !DILocation(line: 18, column: 9, scope: !36) 151 !43 = !DILocation(line: 15, column: 7, scope: !39) 152 !44 = !{!45, !45, i64 0} 153 !45 = !{!"int", !30, i64 0} 154 !46 = !DILocation(line: 19, column: 3, scope: !4) 155 !47 = !DILocation(line: 20, column: 3, scope: !4) 156 157 ... 158 --- 159 name: main 160 alignment: 4 161 exposesReturnsTwice: false 162 hasInlineAsm: false 163 allVRegsAllocated: true 164 isSSA: false 165 tracksRegLiveness: true 166 tracksSubRegLiveness: false 167 liveins: 168 - { reg: '%edi' } 169 - { reg: '%rsi' } 170 calleeSavedRegisters: [ '%bh', '%bl', '%bp', '%bpl', '%bx', '%ebp', '%ebx', 171 '%rbp', '%rbx', '%r12', '%r13', '%r14', '%r15', 172 '%r12b', '%r13b', '%r14b', '%r15b', '%r12d', '%r13d', 173 '%r14d', '%r15d', '%r12w', '%r13w', '%r14w', '%r15w' ] 174 frameInfo: 175 isFrameAddressTaken: false 176 isReturnAddressTaken: false 177 hasStackMap: false 178 hasPatchPoint: false 179 stackSize: 8 180 offsetAdjustment: 0 181 maxAlignment: 0 182 adjustsStack: true 183 hasCalls: true 184 maxCallFrameSize: 0 185 hasOpaqueSPAdjustment: false 186 hasVAStart: false 187 hasMustTailInVarArgFunc: false 188 fixedStack: 189 - { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '%rbx' } 190 body: | 191 bb.0.entry: 192 successors: %bb.1.if.else(16), %bb.2.if.end(16) 193 liveins: %edi, %rsi, %rbx 194 195 frame-setup PUSH64r killed %rbx, implicit-def %rsp, implicit %rsp 196 CFI_INSTRUCTION .cfi_def_cfa_offset 16 197 CFI_INSTRUCTION .cfi_offset %rbx, -16 198 DBG_VALUE debug-use %edi, debug-use _, !12, !20, debug-location !21 199 DBG_VALUE debug-use %rsi, debug-use _, !13, !20, debug-location !22 200 %eax = MOV32rr %edi 201 DBG_VALUE debug-use %eax, debug-use _, !12, !20, debug-location !21 202 %edi = MOV32ri 2 203 CMP32ri8 killed %eax, 2, implicit-def %eflags, debug-location !26 204 JNE_1 %bb.2.if.end, implicit %eflags 205 206 bb.1.if.else: 207 successors: %bb.2.if.end(0) 208 liveins: %rsi 209 210 DBG_VALUE debug-use %rsi, debug-use _, !13, !20, debug-location !22 211 %rdi = MOV64rm killed %rsi, 1, _, 8, _, debug-location !27 :: (load 8 from %ir.arrayidx, !tbaa !28) 212 dead %eax = XOR32rr undef %eax, undef %eax, implicit-def dead %eflags, implicit-def %al, debug-location !32 213 CALL64pcrel32 @atoi, csr_64, implicit %rsp, implicit %rdi, implicit %al, implicit-def %rsp, implicit-def %eax, debug-location !32 214 %edi = MOV32rr %eax, debug-location !32 215 DBG_VALUE debug-use %edi, debug-use _, !14, !20, debug-location !33 216 217 bb.2.if.end: 218 successors: %bb.3.if.then.3(16), %bb.4.if.else.5(16) 219 liveins: %edi 220 221 CALL64pcrel32 @change, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, implicit-def %eax, debug-location !34 222 %ebx = MOV32rr %eax, debug-location !34 223 DBG_VALUE debug-use %ebx, debug-use _, !14, !20, debug-location !33 224 CMP32ri8 %ebx, 11, implicit-def %eflags, debug-location !37 225 JL_1 %bb.4.if.else.5, implicit killed %eflags, debug-location !37 226 227 bb.3.if.then.3: 228 successors: %bb.5.if.end.7(0) 229 liveins: %ebx 230 231 DBG_VALUE debug-use %ebx, debug-use _, !14, !20, debug-location !33 232 %edi = MOV32rr %ebx, debug-location !38 233 CALL64pcrel32 @modify, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, implicit-def %eax, debug-location !38 234 %ecx = MOV32rr %eax, debug-location !38 235 %ecx = ADD32rr killed %ecx, killed %ebx, implicit-def dead %eflags, debug-location !40 236 JMP_1 %bb.5.if.end.7 237 238 bb.4.if.else.5: 239 successors: %bb.5.if.end.7(0) 240 liveins: %ebx 241 242 DBG_VALUE debug-use %ebx, debug-use _, !14, !20, debug-location !33 243 %edi = MOV32rr killed %ebx, debug-location !42 244 CALL64pcrel32 @inc, csr_64, implicit %rsp, implicit %edi, implicit-def %rsp, implicit-def %eax, debug-location !42 245 %ecx = MOV32rr %eax, debug-location !42 246 247 bb.5.if.end.7: 248 liveins: %ecx 249 250 MOV32mr %rip, 1, _, @m, _, %ecx, debug-location !43 :: (store 4 into @m, !tbaa !44) 251 dead undef %edi = MOV32ri64 @.str, implicit-def %rdi, debug-location !46 252 dead %eax = XOR32rr undef %eax, undef %eax, implicit-def dead %eflags, implicit-def %al, debug-location !47 253 %esi = MOV32rr killed %ecx, debug-location !46 254 CALL64pcrel32 @printf, csr_64, implicit %rsp, implicit %rdi, implicit %esi, implicit %al, implicit-def %rsp, implicit-def dead %eax, debug-location !46 255 %eax = XOR32rr undef %eax, undef %eax, implicit-def dead %eflags, debug-location !47 256 %rbx = POP64r implicit-def %rsp, implicit %rsp, debug-location !47 257 RETQ %eax, debug-location !47 258 259 ... 260
