| ; RUN: llc -filetype=asm %s -o - -experimental-debug-variable-locations=false | FileCheck %s |
| ; RUN: llc -filetype=asm %s -o - -experimental-debug-variable-locations=true | FileCheck %s --check-prefixes=CHECK,INSTRREF |
| |
| ; Test the extension of debug ranges from predecessors. |
| ; Generated from the source file LiveDebugValues.c: |
| ; #include <stdio.h> |
| ; int m; |
| ; extern int inc(int n); |
| ; extern int change(int n); |
| ; extern int modify(int n); |
| ; int main(int argc, char **argv) { |
| ; int n; |
| ; if (argc != 2) |
| ; n = 2; |
| ; else |
| ; n = atoi(argv[1]); |
| ; n = change(n); |
| ; if (n > 10) { |
| ; m = modify(n); |
| ; m = m + n; // var `m' doesn't has a dbg.value |
| ; } |
| ; else |
| ; m = inc(n); // var `m' doesn't has a dbg.value |
| ; printf("m(main): %d\n", m); |
| ; return 0; |
| ; } |
| ; with clang -g -O3 -emit-llvm -c LiveDebugValues.c -S -o live-debug-values.ll |
| ; This case will also produce multiple locations but only the debug range |
| ; extension is tested here. |
| |
| ; DBG_VALUE for variable "n" is extended into %bb.5 from its predecessors %bb.3 |
| ; and %bb.4. |
| ; CHECK: .LBB0_5: |
| ; INSTRREF-NEXT: #DEBUG_VALUE: main:argc <- [DW_OP_LLVM_entry_value 1] $edi |
| ; INSTRREF-NEXT: #DEBUG_VALUE: main:argv <- [DW_OP_LLVM_entry_value 1] $rsi |
| ; CHECK-NEXT: #DEBUG_VALUE: main:n <- $ebx |
| ; Other register values have been clobbered. |
| ; CHECK-NOT: #DEBUG_VALUE: |
| ; CHECK: movl %e{{..}}, m(%rip) |
| |
| ; ModuleID = 'LiveDebugValues.c' |
| source_filename = "test/DebugInfo/X86/live-debug-values.ll" |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @m = common dso_local global i32 0, align 4, !dbg !0 |
| @.str = private unnamed_addr constant [13 x i8] c"m(main): %d\0A\00", align 1 |
| |
| ; Function Attrs: nounwind uwtable |
| define dso_local i32 @main(i32 %argc, i8** nocapture readonly %argv) #0 !dbg !10 { |
| entry: |
| tail call void @llvm.dbg.value(metadata i32 %argc, metadata !17, metadata !20), !dbg !21 |
| tail call void @llvm.dbg.value(metadata i8** %argv, metadata !18, metadata !20), !dbg !22 |
| %cmp = icmp eq i32 %argc, 2, !dbg !24 |
| br i1 %cmp, label %if.else, label %if.end, !dbg !26 |
| |
| if.else: ; preds = %entry |
| %arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1, !dbg !27 |
| %0 = load i8*, i8** %arrayidx, align 8, !dbg !27, !tbaa !28 |
| %call = tail call i32 (i8*, ...) bitcast (i32 (...)* @atoi to i32 (i8*, ...)*)(i8* %0) #1, !dbg !32 |
| tail call void @llvm.dbg.value(metadata i32 %call, metadata !19, metadata !20), !dbg !33 |
| br label %if.end |
| |
| if.end: ; preds = %if.else, %entry |
| %n.0 = phi i32 [ %call, %if.else ], [ 2, %entry ] |
| %call1 = tail call i32 @change(i32 %n.0) #1, !dbg !34 |
| tail call void @llvm.dbg.value(metadata i32 %call1, metadata !19, metadata !20), !dbg !33 |
| %cmp2 = icmp sgt i32 %call1, 10, !dbg !35 |
| br i1 %cmp2, label %if.then.3, label %if.else.5, !dbg !37 |
| |
| if.then.3: ; preds = %if.end |
| %call4 = tail call i32 @modify(i32 %call1) #1, !dbg !38 |
| %add = add nsw i32 %call4, %call1, !dbg !40 |
| br label %if.end.7, !dbg !41 |
| |
| if.else.5: ; preds = %if.end |
| %call6 = tail call i32 @inc(i32 %call1) #1, !dbg !42 |
| br label %if.end.7 |
| |
| if.end.7: ; preds = %if.else.5, %if.then.3 |
| %storemerge = phi i32 [ %call6, %if.else.5 ], [ %add, %if.then.3 ] |
| store i32 %storemerge, i32* @m, align 4, !dbg !43, !tbaa !44 |
| %call8 = tail call i32 (i8*, ...) @printf(i8* nonnull getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i64 0, i64 0), i32 %storemerge) #1, !dbg !46 |
| ret i32 0, !dbg !47 |
| } |
| |
| ; Function Attrs: nounwind |
| declare i32 @atoi(...) #1 |
| |
| ; Function Attrs: nounwind |
| declare i32 @change(i32) #1 |
| |
| ; Function Attrs: nounwind |
| declare i32 @modify(i32) #1 |
| |
| ; Function Attrs: nounwind |
| declare i32 @inc(i32) #1 |
| |
| ; Function Attrs: nounwind |
| declare i32 @printf(i8* nocapture readonly, ...) #1 |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| attributes #0 = { nounwind uwtable } |
| attributes #1 = { nounwind } |
| attributes #2 = { nounwind readnone } |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!7, !8} |
| !llvm.ident = !{!9} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = !DIGlobalVariable(name: "m", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true) |
| !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.8.0 (trunk 253049) ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) |
| !3 = !DIFile(filename: "LiveDebugValues.c", directory: "/home/vt/julia/test/tvvikram") |
| !4 = !{} |
| !5 = !{!0} |
| !6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !7 = !{i32 2, !"Dwarf Version", i32 4} |
| !8 = !{i32 2, !"Debug Info Version", i32 3} |
| !9 = !{!"clang version 3.8.0 (trunk 253049) "} |
| !10 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 6, type: !11, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !16) |
| !11 = !DISubroutineType(types: !12) |
| !12 = !{!6, !6, !13} |
| !13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64, align: 64) |
| !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64, align: 64) |
| !15 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char) |
| !16 = !{!17, !18, !19} |
| !17 = !DILocalVariable(name: "argc", arg: 1, scope: !10, file: !3, line: 6, type: !6) |
| !18 = !DILocalVariable(name: "argv", arg: 2, scope: !10, file: !3, line: 6, type: !13) |
| !19 = !DILocalVariable(name: "n", scope: !10, file: !3, line: 7, type: !6) |
| !20 = !DIExpression() |
| !21 = !DILocation(line: 6, column: 14, scope: !10) |
| !22 = !DILocation(line: 6, column: 27, scope: !23) |
| !23 = !DILexicalBlockFile(scope: !10, file: !3, discriminator: 1) |
| !24 = !DILocation(line: 8, column: 12, scope: !25) |
| !25 = distinct !DILexicalBlock(scope: !10, file: !3, line: 8, column: 7) |
| !26 = !DILocation(line: 8, column: 7, scope: !10) |
| !27 = !DILocation(line: 11, column: 14, scope: !25) |
| !28 = !{!29, !29, i64 0} |
| !29 = !{!"any pointer", !30, i64 0} |
| !30 = !{!"omnipotent char", !31, i64 0} |
| !31 = !{!"Simple C/C++ TBAA"} |
| !32 = !DILocation(line: 11, column: 9, scope: !25) |
| !33 = !DILocation(line: 7, column: 7, scope: !23) |
| !34 = !DILocation(line: 12, column: 7, scope: !10) |
| !35 = !DILocation(line: 13, column: 9, scope: !36) |
| !36 = distinct !DILexicalBlock(scope: !10, file: !3, line: 13, column: 7) |
| !37 = !DILocation(line: 13, column: 7, scope: !10) |
| !38 = !DILocation(line: 14, column: 9, scope: !39) |
| !39 = distinct !DILexicalBlock(scope: !36, file: !3, line: 13, column: 15) |
| !40 = !DILocation(line: 15, column: 11, scope: !39) |
| !41 = !DILocation(line: 16, column: 3, scope: !39) |
| !42 = !DILocation(line: 18, column: 9, scope: !36) |
| !43 = !DILocation(line: 15, column: 7, scope: !39) |
| !44 = !{!45, !45, i64 0} |
| !45 = !{!"int", !30, i64 0} |
| !46 = !DILocation(line: 19, column: 3, scope: !10) |
| !47 = !DILocation(line: 20, column: 3, scope: !10) |
| |