| ; RUN: opt -passes=adce -S < %s | FileCheck %s |
| ; Test that debug info intrinsics in dead scopes get eliminated by -adce. |
| |
| ; Generated with 'clang -g -S -emit-llvm | opt -mem2reg -inline' at r262899 |
| ; (before -adce was augmented) and then hand-reduced. This was the input: |
| ; |
| ;;void sink(void); |
| ;; |
| ;;void variable_in_unused_subscope(void) { |
| ;; { int i = 0; } |
| ;; sink(); |
| ;;} |
| ;; |
| ;;void variable_in_parent_scope(void) { |
| ;; int i = 0; |
| ;; { sink(); } |
| ;;} |
| ;; |
| ;;static int empty_function_with_unused_variable(void) { |
| ;; { int i = 0; } |
| ;; return 0; |
| ;;} |
| ;; |
| ;;void calls_empty_function_with_unused_variable_in_unused_subscope(void) { |
| ;; { empty_function_with_unused_variable(); } |
| ;; sink(); |
| ;;} |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| declare void @sink() |
| |
| ; CHECK-LABEL: define void @variable_in_unused_subscope( |
| define void @variable_in_unused_subscope() !dbg !4 { |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: call void @sink |
| ; CHECK-NEXT: ret void |
| entry: |
| call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !17), !dbg !18 |
| call void @sink(), !dbg !19 |
| ret void, !dbg !20 |
| } |
| |
| ; CHECK-LABEL: define void @variable_in_parent_scope( |
| define void @variable_in_parent_scope() !dbg !7 { |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: call void @llvm.dbg.value |
| ; CHECK-NEXT: call void @sink |
| ; CHECK-NEXT: ret void |
| entry: |
| call void @llvm.dbg.value(metadata i32 0, metadata !21, metadata !17), !dbg !22 |
| call void @sink(), !dbg !23 |
| ret void, !dbg !25 |
| } |
| |
| ; CHECK-LABEL: define void @calls_empty_function_with_unused_variable_in_unused_subscope( |
| define void @calls_empty_function_with_unused_variable_in_unused_subscope() !dbg !8 { |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: call void @sink |
| ; CHECK-NEXT: ret void |
| entry: |
| call void @llvm.dbg.value(metadata i32 0, metadata !26, metadata !17), !dbg !28 |
| call void @sink(), !dbg !31 |
| ret void, !dbg !32 |
| } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!14} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "t.c", directory: "/path/to/test/Transforms/ADCE") |
| !2 = !{} |
| !4 = distinct !DISubprogram(name: "variable_in_unused_subscope", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) |
| !5 = !DISubroutineType(types: !6) |
| !6 = !{null} |
| !7 = distinct !DISubprogram(name: "variable_in_parent_scope", scope: !1, file: !1, line: 8, type: !5, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) |
| !8 = distinct !DISubprogram(name: "calls_empty_function_with_unused_variable_in_unused_subscope", scope: !1, file: !1, line: 18, type: !5, isLocal: false, isDefinition: true, scopeLine: 18, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) |
| !10 = distinct !DISubprogram(name: "empty_function_with_unused_variable", scope: !1, file: !1, line: 13, type: !11, isLocal: true, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) |
| !11 = !DISubroutineType(types: !12) |
| !12 = !{!13} |
| !13 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !14 = !{i32 2, !"Debug Info Version", i32 3} |
| !15 = !DILocalVariable(name: "i", scope: !16, file: !1, line: 4, type: !13) |
| !16 = distinct !DILexicalBlock(scope: !4, file: !1, line: 4, column: 3) |
| !17 = !DIExpression() |
| !18 = !DILocation(line: 4, column: 9, scope: !16) |
| !19 = !DILocation(line: 5, column: 3, scope: !4) |
| !20 = !DILocation(line: 6, column: 1, scope: !4) |
| !21 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 9, type: !13) |
| !22 = !DILocation(line: 9, column: 7, scope: !7) |
| !23 = !DILocation(line: 10, column: 5, scope: !24) |
| !24 = distinct !DILexicalBlock(scope: !7, file: !1, line: 10, column: 3) |
| !25 = !DILocation(line: 11, column: 1, scope: !7) |
| !26 = !DILocalVariable(name: "i", scope: !27, file: !1, line: 14, type: !13) |
| !27 = distinct !DILexicalBlock(scope: !10, file: !1, line: 14, column: 3) |
| !28 = !DILocation(line: 14, column: 9, scope: !27, inlinedAt: !29) |
| !29 = distinct !DILocation(line: 19, column: 5, scope: !30) |
| !30 = distinct !DILexicalBlock(scope: !8, file: !1, line: 19, column: 3) |
| !31 = !DILocation(line: 20, column: 3, scope: !8) |
| !32 = !DILocation(line: 21, column: 1, scope: !8) |