1 ; RUN: llc -mtriple x86_64-pc-linux -O0 < %s | FileCheck %s 2 3 ; Make sure that the sequence of debug locations for function foo is correctly 4 ; generated. More specifically, .loc entries for lines 4,5,6,7 must appear in 5 ; the correct sequence. 6 7 ; $ clang -emit-llvm -S -g dbg-combine.c 8 ; 1. int foo() 9 ; 2. { 10 ; 3. int elems = 3; 11 ; 4. int array1[elems]; 12 ; 5. array1[0]=0; 13 ; 6. array1[1]=1; 14 ; 7. array1[2]=2; 15 ; 8. int array2[elems]; 16 ; 9. array2[0]=1; 17 ; 10. return array2[0]; 18 ; 11. } 19 20 ; CHECK: .loc 1 4 21 ; CHECK: .loc 1 5 22 ; CHECK: .loc 1 6 23 ; CHECK: .loc 1 7 24 25 ; ModuleID = 'dbg-combine.c' 26 ; Function Attrs: nounwind uwtable 27 define i32 @foo() #0 { 28 entry: 29 %elems = alloca i32, align 4 30 %saved_stack = alloca i8* 31 %cleanup.dest.slot = alloca i32 32 call void @llvm.dbg.declare(metadata i32* %elems, metadata !12, metadata !13), !dbg !14 33 store i32 3, i32* %elems, align 4, !dbg !14 34 %0 = load i32, i32* %elems, align 4, !dbg !15 35 %1 = zext i32 %0 to i64, !dbg !16 36 %2 = call i8* @llvm.stacksave(), !dbg !16 37 store i8* %2, i8** %saved_stack, !dbg !16 38 %vla = alloca i32, i64 %1, align 16, !dbg !16 39 call void @llvm.dbg.declare(metadata i32* %vla, metadata !17, metadata !21), !dbg !22 40 %arrayidx = getelementptr inbounds i32, i32* %vla, i64 0, !dbg !23 41 store i32 0, i32* %arrayidx, align 4, !dbg !24 42 %arrayidx1 = getelementptr inbounds i32, i32* %vla, i64 1, !dbg !25 43 store i32 1, i32* %arrayidx1, align 4, !dbg !26 44 %arrayidx2 = getelementptr inbounds i32, i32* %vla, i64 2, !dbg !27 45 store i32 2, i32* %arrayidx2, align 4, !dbg !28 46 %3 = load i32, i32* %elems, align 4, !dbg !29 47 %4 = zext i32 %3 to i64, !dbg !30 48 %vla3 = alloca i32, i64 %4, align 16, !dbg !30 49 call void @llvm.dbg.declare(metadata i32* %vla3, metadata !31, metadata !21), !dbg !32 50 %arrayidx4 = getelementptr inbounds i32, i32* %vla3, i64 0, !dbg !33 51 store i32 1, i32* %arrayidx4, align 4, !dbg !34 52 %arrayidx5 = getelementptr inbounds i32, i32* %vla3, i64 0, !dbg !35 53 %5 = load i32, i32* %arrayidx5, align 4, !dbg !35 54 store i32 1, i32* %cleanup.dest.slot 55 %6 = load i8*, i8** %saved_stack, !dbg !36 56 call void @llvm.stackrestore(i8* %6), !dbg !36 57 ret i32 %5, !dbg !36 58 } 59 60 ; Function Attrs: nounwind readnone 61 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 62 63 ; Function Attrs: nounwind 64 declare i8* @llvm.stacksave() #2 65 66 ; Function Attrs: nounwind 67 declare void @llvm.stackrestore(i8*) #2 68 69 attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 70 attributes #1 = { nounwind readnone } 71 attributes #2 = { nounwind } 72 73 !llvm.dbg.cu = !{!0} 74 !llvm.module.flags = !{!9, !10} 75 !llvm.ident = !{!11} 76 77 !0 = !MDCompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0 (trunk 227074)", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 78 !1 = !MDFile(filename: "dbg-combine.c", directory: "/home/probinson/projects/scratch") 79 !2 = !{} 80 !3 = !{!4} 81 !4 = !MDSubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, isOptimized: false, scopeLine: 2, file: !1, scope: !5, type: !6, function: i32 ()* @foo, variables: !2) 82 !5 = !MDFile(filename: "dbg-combine.c", directory: "/home/probinson/projects/scratch") 83 !6 = !MDSubroutineType(types: !7) 84 !7 = !{!8} 85 !8 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 86 !9 = !{i32 2, !"Dwarf Version", i32 4} 87 !10 = !{i32 2, !"Debug Info Version", i32 3} 88 !11 = !{!"clang version 3.7.0 (trunk 227074)"} 89 !12 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "elems", line: 3, scope: !4, file: !5, type: !8) 90 !13 = !MDExpression() 91 !14 = !MDLocation(line: 3, column: 8, scope: !4) 92 !15 = !MDLocation(line: 4, column: 15, scope: !4) 93 !16 = !MDLocation(line: 4, column: 4, scope: !4) 94 !17 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "array1", line: 4, scope: !4, file: !5, type: !18) 95 !18 = !MDCompositeType(tag: DW_TAG_array_type, align: 32, baseType: !8, elements: !19) 96 !19 = !{!20} 97 !20 = !MDSubrange(count: -1) 98 !21 = !MDExpression(DW_OP_deref) 99 !22 = !MDLocation(line: 4, column: 8, scope: !4) 100 !23 = !MDLocation(line: 5, column: 4, scope: !4) 101 !24 = !MDLocation(line: 5, column: 13, scope: !4) 102 !25 = !MDLocation(line: 6, column: 4, scope: !4) 103 !26 = !MDLocation(line: 6, column: 13, scope: !4) 104 !27 = !MDLocation(line: 7, column: 4, scope: !4) 105 !28 = !MDLocation(line: 7, column: 13, scope: !4) 106 !29 = !MDLocation(line: 8, column: 15, scope: !4) 107 !30 = !MDLocation(line: 8, column: 4, scope: !4) 108 !31 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "array2", line: 8, scope: !4, file: !5, type: !18) 109 !32 = !MDLocation(line: 8, column: 8, scope: !4) 110 !33 = !MDLocation(line: 9, column: 4, scope: !4) 111 !34 = !MDLocation(line: 9, column: 13, scope: !4) 112 !35 = !MDLocation(line: 10, column: 11, scope: !4) 113 !36 = !MDLocation(line: 11, column: 1, scope: !4) 114
