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- ; RUN: opt < %s -add-discriminators -S | FileCheck %s
- ; We should not generate discriminators for DWARF versions prior to 4.
- ;
- ; Original code:
- ;
- ; int foo(long i) {
- ; if (i < 5) return 2; else return 90;
- ; }
- ;
- ; None of the !dbg nodes associated with the if() statement should be
- ; altered. If they are, it means that the discriminators pass added a
- ; new lexical scope.
- define i32 @foo(i64 %i) #0 {
- entry:
- %retval = alloca i32, align 4
- %i.addr = alloca i64, align 8
- store i64 %i, i64* %i.addr, align 8
- call void @llvm.dbg.declare(metadata i64* %i.addr, metadata !13, metadata !DIExpression()), !dbg !14
- %0 = load i64, i64* %i.addr, align 8, !dbg !15
- ; CHECK: %0 = load i64, i64* %i.addr, align 8, !dbg ![[ENTRY:[0-9]+]]
- %cmp = icmp slt i64 %0, 5, !dbg !15
- ; CHECK: %cmp = icmp slt i64 %0, 5, !dbg ![[ENTRY:[0-9]+]]
- br i1 %cmp, label %if.then, label %if.else, !dbg !15
- ; CHECK: br i1 %cmp, label %if.then, label %if.else, !dbg ![[ENTRY:[0-9]+]]
- if.then: ; preds = %entry
- store i32 2, i32* %retval, !dbg !15
- br label %return, !dbg !15
- if.else: ; preds = %entry
- store i32 90, i32* %retval, !dbg !15
- br label %return, !dbg !15
- return: ; preds = %if.else, %if.then
- %1 = load i32, i32* %retval, !dbg !17
- ret i32 %1, !dbg !17
- }
- ; Function Attrs: nounwind readnone
- declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
- 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" }
- attributes #1 = { nounwind readnone }
- !llvm.dbg.cu = !{!0}
- !llvm.module.flags = !{!10, !11}
- !llvm.ident = !{!12}
- !0 = !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
- !1 = !DIFile(filename: "no-discriminators", directory: ".")
- !2 = !{}
- !3 = !{!4}
- !4 = !DISubprogram(name: "foo", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, function: i32 (i64)* @foo, variables: !2)
- ; CHECK: ![[FOO:[0-9]+]] = !DISubprogram(name: "foo"
- !5 = !DIFile(filename: "no-discriminators", directory: ".")
- !6 = !DISubroutineType(types: !7)
- !7 = !{!8, !9}
- !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
- !9 = !DIBasicType(tag: DW_TAG_base_type, name: "long int", size: 64, align: 64, encoding: DW_ATE_signed)
- !10 = !{i32 2, !"Dwarf Version", i32 2}
- ; CHECK: !{i32 2, !"Dwarf Version", i32 2}
- !11 = !{i32 1, !"Debug Info Version", i32 3}
- !12 = !{!"clang version 3.5.0 "}
- !13 = !DILocalVariable(tag: DW_TAG_arg_variable, name: "i", line: 1, arg: 1, scope: !4, file: !5, type: !9)
- !14 = !DILocation(line: 1, scope: !4)
- !15 = !DILocation(line: 2, scope: !16)
- ; CHECK: ![[ENTRY]] = !DILocation(line: 2, scope: ![[BLOCK:[0-9]+]])
- !16 = distinct !DILexicalBlock(line: 2, column: 0, file: !1, scope: !4)
- ; CHECK: ![[BLOCK]] = distinct !DILexicalBlock(scope: ![[FOO]],{{.*}} line: 2)
- !17 = !DILocation(line: 3, scope: !4)
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