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llvm/test/DebugInfo/COFF/inlining-header.ll
Reid Kleckner c61d5f4b2c [codeview] Shrink inlined call site line info tables 
For a fully inlined call chain like a -> b -> c -> d, we were emitting
line info for 'd' 3 separate times: once for d's actual InlineSite line
table, and twice for 'b' and 'c'. This is particularly inefficient when
all these functions are in different headers, because now we need to
encode the file change. Windbg was coping with our suboptimal output, so
this should not be noticeable from the debugger.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275502 91177308-0d34-0410-b5e6-96231b3b80d8
2016-07-14 23:47:15 +00:00

168 lines
6.9 KiB
LLVM
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; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32 < %s | FileCheck %s --check-prefix=ASM
; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32 < %s -filetype=obj | llvm-readobj -codeview | FileCheck %s --check-prefix=OBJ
; This C++ source should run and you should be able to step through the volatile
; modifications to x in windbg.
; # 1 "t.cpp" 2
; volatile int x;
;
; # 1 "./t.h" 1
; inline void f() {
; x += 3;
; }
; # 3 "t.cpp" 2
; inline __forceinline void g() {
; x += 2;
; f();
; x += 2;
; }
; int main() {
; x += 1;
; g();
; x += 1;
; return x;
; }
; ASM: _main: # @main
; ASM: Lfunc_begin0:
; ASM: # BB#0: # %entry
; ASM: .cv_file 1 "D:\\src\\llvm\\build\\t.cpp"
; ASM: .cv_loc 0 1 9 5 is_stmt 0 # t.cpp:9:5
; ASM: incl "?x@@3HC"
; ASM: .cv_loc 1 1 4 5 # t.cpp:4:5
; ASM: addl $2, "?x@@3HC"
; ASM: .cv_file 2 "D:\\src\\llvm\\build\\t.h"
; ASM: .cv_loc 2 2 2 5 # ./t.h:2:5
; ASM: addl $3, "?x@@3HC"
; ASM: .cv_loc 1 1 6 5 # t.cpp:6:5
; ASM: addl $2, "?x@@3HC"
; ASM: .cv_loc 0 1 11 5 # t.cpp:11:5
; ASM: incl "?x@@3HC"
; ASM: .cv_loc 0 1 12 10 # t.cpp:12:10
; ASM: movl "?x@@3HC", %eax
; ASM: .cv_loc 0 1 12 3 # t.cpp:12:3
; ASM: retl
; OBJ: Subsection [
; OBJ: SubSectionType: InlineeLines (0xF6)
; OBJ: SubSectionSize: 0x1C
; OBJ: InlineeSourceLine {
; OBJ: Inlinee: g (0x1002)
; OBJ: FileID: D:\src\llvm\build\t.cpp (0x0)
; OBJ: SourceLineNum: 3
; OBJ: }
; OBJ: InlineeSourceLine {
; OBJ: Inlinee: f (0x1003)
; OBJ: FileID: D:\src\llvm\build\t.h (0x8)
; OBJ: SourceLineNum: 1
; OBJ: }
; OBJ: ]
; OBJ: Subsection [
; OBJ: SubSectionType: Symbols (0xF1)
; OBJ: SubSectionSize: 0x62
; OBJ: ProcStart {
; OBJ: Kind: S_GPROC32_ID (0x1147)
; OBJ: FunctionType: main (0x1005)
; OBJ: CodeOffset: _main+0x0
; OBJ: Segment: 0x0
; OBJ: Flags [ (0x0)
; OBJ: ]
; OBJ: DisplayName: main
; OBJ: LinkageName: _main
; OBJ: }
; Previously, g's InlineSite referenced t.h, which was wasteful.
; OBJ: InlineSite {
; OBJ: Inlinee: g (0x1002)
; OBJ: BinaryAnnotations [
; OBJ-NEXT: ChangeCodeOffsetAndLineOffset: {CodeOffset: 0x6, LineOffset: 1}
; OBJ-NEXT: ChangeCodeOffsetAndLineOffset: {CodeOffset: 0xE, LineOffset: 2}
; OBJ-NEXT: ChangeCodeLength: 0x7
; OBJ-NEXT: ]
; OBJ: }
; OBJ: InlineSite {
; OBJ: Inlinee: f (0x1003)
; OBJ: BinaryAnnotations [
; OBJ-NEXT: ChangeCodeOffsetAndLineOffset: {CodeOffset: 0xD, LineOffset: 1}
; OBJ-NEXT: ChangeCodeLength: 0x7
; OBJ-NEXT:]
; OBJ: }
; OBJ: InlineSiteEnd {
; OBJ: }
; OBJ: InlineSiteEnd {
; OBJ: }
; OBJ: ProcEnd {
; OBJ: }
; OBJ: ]
; ModuleID = 't.cpp'
source_filename = "t.cpp"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.0.24210"
@"\01?x@@3HC" = global i32 0, align 4
; Function Attrs: norecurse nounwind uwtable
define i32 @main() local_unnamed_addr #0 !dbg !11 {
entry:
%0 = load volatile i32, i32* @"\01?x@@3HC", align 4, !dbg !14, !tbaa !15
%add = add nsw i32 %0, 1, !dbg !14
store volatile i32 %add, i32* @"\01?x@@3HC", align 4, !dbg !14, !tbaa !15
%1 = load volatile i32, i32* @"\01?x@@3HC", align 4, !dbg !19, !tbaa !15
%add.i = add nsw i32 %1, 2, !dbg !19
store volatile i32 %add.i, i32* @"\01?x@@3HC", align 4, !dbg !19, !tbaa !15
%2 = load volatile i32, i32* @"\01?x@@3HC", align 4, !dbg !24, !tbaa !15
%add.i.i = add nsw i32 %2, 3, !dbg !24
store volatile i32 %add.i.i, i32* @"\01?x@@3HC", align 4, !dbg !24, !tbaa !15
%3 = load volatile i32, i32* @"\01?x@@3HC", align 4, !dbg !28, !tbaa !15
%add1.i = add nsw i32 %3, 2, !dbg !28
store volatile i32 %add1.i, i32* @"\01?x@@3HC", align 4, !dbg !28, !tbaa !15
%4 = load volatile i32, i32* @"\01?x@@3HC", align 4, !dbg !29, !tbaa !15
%add1 = add nsw i32 %4, 1, !dbg !29
store volatile i32 %add1, i32* @"\01?x@@3HC", align 4, !dbg !29, !tbaa !15
%5 = load volatile i32, i32* @"\01?x@@3HC", align 4, !dbg !30, !tbaa !15
ret i32 %5, !dbg !31
}
attributes #0 = { norecurse nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!7, !8, !9}
!llvm.ident = !{!10}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.9.0 (trunk 275430) (llvm/trunk 275433)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3)
!1 = !DIFile(filename: "t.cpp", directory: "D:\5Csrc\5Cllvm\5Cbuild")
!2 = !{}
!3 = !{!4}
!4 = distinct !DIGlobalVariable(name: "x", linkageName: "\01?x@@3HC", scope: !0, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, variable: i32* @"\01?x@@3HC")
!5 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6)
!6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!7 = !{i32 2, !"CodeView", i32 1}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = !{i32 1, !"PIC Level", i32 2}
!10 = !{!"clang version 3.9.0 (trunk 275430) (llvm/trunk 275433)"}
!11 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 8, type: !12, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
!12 = !DISubroutineType(types: !13)
!13 = !{!6}
!14 = !DILocation(line: 9, column: 5, scope: !11)
!15 = !{!16, !16, i64 0}
!16 = !{!"int", !17, i64 0}
!17 = !{!"omnipotent char", !18, i64 0}
!18 = !{!"Simple C++ TBAA"}
!19 = !DILocation(line: 4, column: 5, scope: !20, inlinedAt: !23)
!20 = distinct !DISubprogram(name: "g", linkageName: "\01?g@@YAXXZ", scope: !1, file: !1, line: 3, type: !21, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
!21 = !DISubroutineType(types: !22)
!22 = !{null}
!23 = distinct !DILocation(line: 10, column: 3, scope: !11)
!24 = !DILocation(line: 2, column: 5, scope: !25, inlinedAt: !27)
!25 = distinct !DISubprogram(name: "f", linkageName: "\01?f@@YAXXZ", scope: !26, file: !26, line: 1, type: !21, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !2)
!26 = !DIFile(filename: "./t.h", directory: "D:\5Csrc\5Cllvm\5Cbuild")
!27 = distinct !DILocation(line: 5, column: 3, scope: !20, inlinedAt: !23)
!28 = !DILocation(line: 6, column: 5, scope: !20, inlinedAt: !23)
!29 = !DILocation(line: 11, column: 5, scope: !11)
!30 = !DILocation(line: 12, column: 10, scope: !11)
!31 = !DILocation(line: 12, column: 3, scope: !11)
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