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Fixed Dwarf debug info emission to skip DILexicalBlockFile entries.
Before this fix, DILexicalBlockFile entries were skipped only in some cases and were not in other cases. Differential Revision: http://reviews.llvm.org/D18724 llvm-svn: 267004
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Amjad Aboud
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Apr 21, 2016
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Original file line number | Diff line number | Diff line change |
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -filetype=obj -O0 < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s | ||
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;; This test checks that Inlined DILexicalBlockFile with local decl entry | ||
;; is skipped and only one DW_TAG_lexical_block is generated. | ||
;; This test is special because it contains DILexicalBlockFile that has a | ||
;; DILexicalBlockFile as a parent scope. | ||
;; | ||
;; This test was generated by running following command: | ||
;; clang -cc1 -O0 -debug-info-kind=limited -dwarf-version=4 -emit-llvm test.cpp | ||
;; Where test.cpp | ||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | ||
;;namespace N {} | ||
;; __attribute__((always_inline)) int bar() { | ||
;; { | ||
;; int y; | ||
;;#line 1 "test.h" | ||
;; using namespace N; | ||
;; while (y < 0) return 2; | ||
;; return 0; | ||
;; } | ||
;;} | ||
;;int foo() { | ||
;; return bar(); | ||
;;} | ||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; | ||
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;; Concrete "bar" function | ||
; CHECK: DW_TAG_subprogram | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_AT_abstract_origin {{.*}} {[[Offset_bar:0x[0-9abcdef]+]]} | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_lexical_block | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_variable | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_imported_module | ||
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;; Abstract "bar" function | ||
; CHECK: [[Offset_bar]]: DW_TAG_subprogram | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_AT_name {{.*}} "bar" | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_AT_inline | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_lexical_block | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_variable | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_imported_module | ||
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; CHECK: DW_TAG_subprogram | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_AT_name {{.*}} "foo" | ||
; CHECK-NOT: {{NULL}} | ||
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;; Inlined "bar" function | ||
; CHECK: DW_TAG_inlined_subroutine | ||
; CHECK-NEXT: DW_AT_abstract_origin {{.*}} {[[Offset_bar]]} | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_lexical_block | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_variable | ||
; CHECK-NOT: {{DW_TAG|NULL}} | ||
; CHECK: DW_TAG_imported_module | ||
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; Function Attrs: alwaysinline nounwind | ||
define i32 @_Z3barv() #0 !dbg !4 { | ||
entry: | ||
%retval = alloca i32, align 4 | ||
%y = alloca i32, align 4 | ||
call void @llvm.dbg.declare(metadata i32* %y, metadata !18, metadata !19), !dbg !20 | ||
br label %while.cond, !dbg !21 | ||
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while.cond: ; preds = %entry | ||
%0 = load i32, i32* %y, align 4, !dbg !22 | ||
%cmp = icmp slt i32 %0, 0, !dbg !22 | ||
br i1 %cmp, label %while.body, label %while.end, !dbg !22 | ||
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while.body: ; preds = %while.cond | ||
store i32 2, i32* %retval, align 4, !dbg !24 | ||
br label %return, !dbg !24 | ||
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while.end: ; preds = %while.cond | ||
store i32 0, i32* %retval, align 4, !dbg !26 | ||
br label %return, !dbg !26 | ||
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return: ; preds = %while.end, %while.body | ||
%1 = load i32, i32* %retval, align 4, !dbg !27 | ||
ret i32 %1, !dbg !27 | ||
} | ||
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; Function Attrs: nounwind readnone | ||
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 | ||
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; Function Attrs: nounwind | ||
define i32 @_Z3foov() #2 !dbg !8 { | ||
entry: | ||
%retval.i = alloca i32, align 4 | ||
%y.i = alloca i32, align 4 | ||
call void @llvm.dbg.declare(metadata i32* %y.i, metadata !18, metadata !19), !dbg !29 | ||
%0 = load i32, i32* %y.i, align 4, !dbg !31 | ||
%cmp.i = icmp slt i32 %0, 0, !dbg !31 | ||
br i1 %cmp.i, label %while.body.i, label %while.end.i, !dbg !31 | ||
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while.body.i: ; preds = %entry | ||
store i32 2, i32* %retval.i, align 4, !dbg !32 | ||
br label %_Z3barv.exit, !dbg !32 | ||
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while.end.i: ; preds = %entry | ||
store i32 0, i32* %retval.i, align 4, !dbg !33 | ||
br label %_Z3barv.exit, !dbg !33 | ||
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_Z3barv.exit: ; preds = %while.end.i, %while.body.i | ||
%1 = load i32, i32* %retval.i, align 4, !dbg !34 | ||
ret i32 %1, !dbg !35 | ||
} | ||
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attributes #0 = { alwaysinline nounwind } | ||
attributes #1 = { nounwind readnone } | ||
attributes #2 = { nounwind } | ||
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!llvm.dbg.cu = !{!0} | ||
!llvm.module.flags = !{!15, !16} | ||
!llvm.ident = !{!17} | ||
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.9.0 (trunk 264349)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, imports: !10) | ||
!1 = !DIFile(filename: "test.cpp", directory: "/") | ||
!2 = !{} | ||
!4 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barv", scope: !1, file: !1, line: 2, type: !5, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2) | ||
!5 = !DISubroutineType(types: !6) | ||
!6 = !{!7} | ||
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) | ||
!8 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !9, file: !9, line: 6, type: !5, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2) | ||
!9 = !DIFile(filename: "test.h", directory: "/") | ||
!10 = !{!11} | ||
!11 = !DIImportedEntity(tag: DW_TAG_imported_module, scope: !12, entity: !14, line: 1) | ||
!12 = !DILexicalBlockFile(scope: !13, file: !9, discriminator: 0) | ||
!13 = distinct !DILexicalBlock(scope: !4, file: !1, line: 3) | ||
!14 = !DINamespace(name: "N", scope: null, file: !1, line: 1) | ||
!15 = !{i32 2, !"Dwarf Version", i32 4} | ||
!16 = !{i32 2, !"Debug Info Version", i32 3} | ||
!17 = !{!"clang version 3.9.0 (trunk 264349)"} | ||
!18 = !DILocalVariable(name: "y", scope: !13, file: !1, line: 4, type: !7) | ||
!19 = !DIExpression() | ||
!20 = !DILocation(line: 4, scope: !13) | ||
!21 = !DILocation(line: 2, scope: !12) | ||
!22 = !DILocation(line: 2, scope: !23) | ||
!23 = !DILexicalBlockFile(scope: !12, file: !9, discriminator: 1) | ||
!24 = !DILocation(line: 2, scope: !25) | ||
!25 = !DILexicalBlockFile(scope: !12, file: !9, discriminator: 2) | ||
!26 = !DILocation(line: 3, scope: !12) | ||
!27 = !DILocation(line: 5, scope: !28) | ||
!28 = !DILexicalBlockFile(scope: !4, file: !9, discriminator: 0) | ||
!29 = !DILocation(line: 4, scope: !13, inlinedAt: !30) | ||
!30 = distinct !DILocation(line: 7, scope: !8) | ||
!31 = !DILocation(line: 2, scope: !23, inlinedAt: !30) | ||
!32 = !DILocation(line: 2, scope: !25, inlinedAt: !30) | ||
!33 = !DILocation(line: 3, scope: !12, inlinedAt: !30) | ||
!34 = !DILocation(line: 5, scope: !28, inlinedAt: !30) | ||
!35 = !DILocation(line: 7, scope: !8) |