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llvm-dwarfdump --statistics: Unique abstract origins across multiple CUs.
Instead of indexing local variables by DIE offset, use the variable name + the path through the lexical block tree. This makes the lookup key consistent across duplicate abstract origins in different CUs. llvm-svn: 342776
This commit is contained in:
Adrian Prantl
parent
90a59135b6
commit
4f6ce420fd
193
test/tools/llvm-dwarfdump/X86/stats-inlining-multi-cu.ll
Normal file
193
test/tools/llvm-dwarfdump/X86/stats-inlining-multi-cu.ll
Normal file
@ -0,0 +1,193 @@
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; RUN: llc -O0 %s -o - -filetype=obj \
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; RUN: | llvm-dwarfdump -statistics - | FileCheck %s
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; Test that abstract origins in multiple CUs are uniqued.
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; CHECK: "source functions":4,
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; CHECK-SAME: "inlined functions":5,
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; CHECK-SAME: "unique source variables":4
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; CHECK-SAME: "source variables":6
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; CHECK-SAME: "variables with location":6
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;header.h:
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;extern "C" int getchar();
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;template<typename T> T __attribute__((always_inline)) inlined() {
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; if (getchar()=='a') {
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; int i = getchar();
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; return i;
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; } else {
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; int i = 'a';
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; return i;
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; }
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;}
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;b.cpp:
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;#include <header.h>
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;int b() {
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; int b = inlined<int>();
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; return b+1;
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;}
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;a.cpp
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;#include <header.h>
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;int b();
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;int a() {
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; int a = inlined<int>();
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; return a+1;
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;}
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;
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;int main() {
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; return a() + b();
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;}
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; ModuleID = 'linked.ll'
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source_filename = "llvm-link"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.14.0"
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; Function Attrs: noinline optnone ssp uwtable
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define i32 @_Z1av() #0 !dbg !10 {
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entry:
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%retval.i = alloca i32, align 4
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%i.i = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %i.i, metadata !14, metadata !DIExpression()), !dbg !21
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%i2.i = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %i2.i, metadata !23, metadata !DIExpression()), !dbg !25
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%a = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %a, metadata !26, metadata !DIExpression()), !dbg !27
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%call.i = call i32 @getchar(), !dbg !28
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%cmp.i = icmp eq i32 %call.i, 97, !dbg !28
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br i1 %cmp.i, label %if.then.i, label %if.else.i, !dbg !29
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if.then.i: ; preds = %entry
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%call1.i = call i32 @getchar(), !dbg !21
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store i32 %call1.i, i32* %i.i, align 4, !dbg !21
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%0 = load i32, i32* %i.i, align 4, !dbg !30
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store i32 %0, i32* %retval.i, align 4, !dbg !30
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br label %_Z7inlinedIiET_v.exit, !dbg !30
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if.else.i: ; preds = %entry
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store i32 97, i32* %i2.i, align 4, !dbg !25
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%1 = load i32, i32* %i2.i, align 4, !dbg !31
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store i32 %1, i32* %retval.i, align 4, !dbg !31
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br label %_Z7inlinedIiET_v.exit, !dbg !31
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_Z7inlinedIiET_v.exit: ; preds = %if.else.i, %if.then.i
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%2 = load i32, i32* %retval.i, align 4, !dbg !32
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store i32 %2, i32* %a, align 4, !dbg !27
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%3 = load i32, i32* %a, align 4, !dbg !33
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%add = add nsw i32 %3, 1, !dbg !33
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ret i32 %add, !dbg !33
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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declare i32 @getchar()
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; Function Attrs: noinline norecurse optnone ssp uwtable
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define i32 @main() #3 !dbg !34 {
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entry:
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%retval = alloca i32, align 4
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store i32 0, i32* %retval, align 4
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%call = call i32 @_Z1av(), !dbg !35
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%call1 = call i32 @_Z1bv(), !dbg !35
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%add = add nsw i32 %call, %call1, !dbg !35
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ret i32 %add, !dbg !35
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}
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; Function Attrs: noinline optnone ssp uwtable
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define i32 @_Z1bv() #0 !dbg !36 {
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entry:
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%retval.i = alloca i32, align 4
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%i.i = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %i.i, metadata !37, metadata !DIExpression()), !dbg !41
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%i2.i = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %i2.i, metadata !43, metadata !DIExpression()), !dbg !45
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%b = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %b, metadata !46, metadata !DIExpression()), !dbg !47
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%call.i = call i32 @getchar(), !dbg !48
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%cmp.i = icmp eq i32 %call.i, 97, !dbg !48
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br i1 %cmp.i, label %if.then.i, label %if.else.i, !dbg !49
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if.then.i: ; preds = %entry
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%call1.i = call i32 @getchar(), !dbg !41
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store i32 %call1.i, i32* %i.i, align 4, !dbg !41
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%0 = load i32, i32* %i.i, align 4, !dbg !50
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store i32 %0, i32* %retval.i, align 4, !dbg !50
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br label %_Z7inlinedIiET_v.exit, !dbg !50
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if.else.i: ; preds = %entry
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store i32 97, i32* %i2.i, align 4, !dbg !45
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%1 = load i32, i32* %i2.i, align 4, !dbg !51
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store i32 %1, i32* %retval.i, align 4, !dbg !51
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br label %_Z7inlinedIiET_v.exit, !dbg !51
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_Z7inlinedIiET_v.exit: ; preds = %if.else.i, %if.then.i
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%2 = load i32, i32* %retval.i, align 4, !dbg !52
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store i32 %2, i32* %b, align 4, !dbg !47
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%3 = load i32, i32* %b, align 4, !dbg !53
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%add = add nsw i32 %3, 1, !dbg !53
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ret i32 %add, !dbg !53
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}
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attributes #0 = { noinline optnone ssp uwtable }
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attributes #1 = { nounwind readnone speculatable }
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attributes #3 = { noinline norecurse optnone ssp uwtable }
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!llvm.dbg.cu = !{!0, !3}
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!llvm.ident = !{!5, !5}
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!llvm.module.flags = !{!6, !7, !8, !9}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 340541) (llvm/trunk 340540)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "a.cpp", directory: "/tmp")
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!2 = !{}
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!3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "clang version 8.0.0 (trunk 340541) (llvm/trunk 340540)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!4 = !DIFile(filename: "b.cpp", directory: "/tmp")
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!5 = !{!"clang version 8.0.0 (trunk 340541) (llvm/trunk 340540)"}
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!6 = !{i32 2, !"Dwarf Version", i32 4}
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!7 = !{i32 2, !"Debug Info Version", i32 3}
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!8 = !{i32 1, !"wchar_size", i32 4}
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!9 = !{i32 7, !"PIC Level", i32 2}
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!10 = distinct !DISubprogram(name: "a", linkageName: "_Z1av", scope: !1, file: !1, line: 3, type: !11, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!11 = !DISubroutineType(types: !12)
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!12 = !{!13}
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!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!14 = !DILocalVariable(name: "i", scope: !15, file: !16, line: 4, type: !13)
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!15 = distinct !DILexicalBlock(scope: !17, file: !16, line: 3)
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!16 = !DIFile(filename: "./header.h", directory: "/tmp")
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!17 = distinct !DILexicalBlock(scope: !18, file: !16, line: 3)
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!18 = distinct !DISubprogram(name: "inlined<int>", linkageName: "_Z7inlinedIiET_v", scope: !16, file: !16, line: 2, type: !11, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, templateParams: !19, retainedNodes: !2)
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!19 = !{!20}
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!20 = !DITemplateTypeParameter(name: "T", type: !13)
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!21 = !DILocation(line: 4, scope: !15, inlinedAt: !22)
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!22 = distinct !DILocation(line: 4, scope: !10)
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!23 = !DILocalVariable(name: "i", scope: !24, file: !16, line: 7, type: !13)
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!24 = distinct !DILexicalBlock(scope: !17, file: !16, line: 6)
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!25 = !DILocation(line: 7, scope: !24, inlinedAt: !22)
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!26 = !DILocalVariable(name: "a", scope: !10, file: !1, line: 4, type: !13)
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!27 = !DILocation(line: 4, scope: !10)
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!28 = !DILocation(line: 3, scope: !17, inlinedAt: !22)
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!29 = !DILocation(line: 3, scope: !18, inlinedAt: !22)
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!30 = !DILocation(line: 5, scope: !15, inlinedAt: !22)
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!31 = !DILocation(line: 8, scope: !24, inlinedAt: !22)
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!32 = !DILocation(line: 10, scope: !18, inlinedAt: !22)
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!33 = !DILocation(line: 5, scope: !10)
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!34 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 12, type: !11, isLocal: false, isDefinition: true, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!35 = !DILocation(line: 13, scope: !34)
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!36 = distinct !DISubprogram(name: "b", linkageName: "_Z1bv", scope: !4, file: !4, line: 2, type: !11, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !3, retainedNodes: !2)
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!37 = !DILocalVariable(name: "i", scope: !38, file: !16, line: 4, type: !13)
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!38 = distinct !DILexicalBlock(scope: !39, file: !16, line: 3)
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!39 = distinct !DILexicalBlock(scope: !40, file: !16, line: 3)
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!40 = distinct !DISubprogram(name: "inlined<int>", linkageName: "_Z7inlinedIiET_v", scope: !16, file: !16, line: 2, type: !11, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !3, templateParams: !19, retainedNodes: !2)
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!41 = !DILocation(line: 4, scope: !38, inlinedAt: !42)
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!42 = distinct !DILocation(line: 3, scope: !36)
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!43 = !DILocalVariable(name: "i", scope: !44, file: !16, line: 7, type: !13)
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!44 = distinct !DILexicalBlock(scope: !39, file: !16, line: 6)
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!45 = !DILocation(line: 7, scope: !44, inlinedAt: !42)
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!46 = !DILocalVariable(name: "b", scope: !36, file: !4, line: 3, type: !13)
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!47 = !DILocation(line: 3, scope: !36)
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!48 = !DILocation(line: 3, scope: !39, inlinedAt: !42)
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!49 = !DILocation(line: 3, scope: !40, inlinedAt: !42)
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!50 = !DILocation(line: 5, scope: !38, inlinedAt: !42)
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!51 = !DILocation(line: 8, scope: !44, inlinedAt: !42)
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!52 = !DILocation(line: 10, scope: !40, inlinedAt: !42)
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!53 = !DILocation(line: 4, scope: !36)
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185
test/tools/llvm-dwarfdump/X86/stats-inlining-single-cu.ll
Normal file
185
test/tools/llvm-dwarfdump/X86/stats-inlining-single-cu.ll
Normal file
@ -0,0 +1,185 @@
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; RUN: llc -O0 %s -o - -filetype=obj \
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; RUN: | llvm-dwarfdump -statistics - | FileCheck %s
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; This test serves as a baseline / sanity-check for stats-inlining-multi-cu.ll
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; The results for both tests should be identical.
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; CHECK: "source functions":4,
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; CHECK-SAME: "inlined functions":5,
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; CHECK-SAME: "unique source variables":4
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; CHECK-SAME: "source variables":6
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; CHECK-SAME: "variables with location":6
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;header.h:
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;extern "C" int getchar();
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;template<typename T> T __attribute__((always_inline)) inlined() {
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; if (getchar()=='a') {
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; int i = getchar();
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; return i;
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; } else {
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; int i = 'a';
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; return i;
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; }
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;}
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;ab.cpp
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;#include <header.h>
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;int b();
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;int a() {
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; int a = inlined<int>();
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; return a+1;
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;}
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;
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;int b() {
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; int b = inlined<int>();
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; return b+1;
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;}
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;int main() {
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; return a() + b();
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;}
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; ModuleID = 'a.cpp'
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source_filename = "a.cpp"
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.14.0"
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; Function Attrs: noinline optnone ssp uwtable
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define i32 @_Z1av() #0 !dbg !8 {
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entry:
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%retval.i = alloca i32, align 4
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%i.i = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %i.i, metadata !12, metadata !DIExpression()), !dbg !19
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%i2.i = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %i2.i, metadata !21, metadata !DIExpression()), !dbg !23
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%a = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %a, metadata !24, metadata !DIExpression()), !dbg !25
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%call.i = call i32 @getchar(), !dbg !26
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%cmp.i = icmp eq i32 %call.i, 97, !dbg !26
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br i1 %cmp.i, label %if.then.i, label %if.else.i, !dbg !27
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if.then.i: ; preds = %entry
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%call1.i = call i32 @getchar(), !dbg !19
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store i32 %call1.i, i32* %i.i, align 4, !dbg !19
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%0 = load i32, i32* %i.i, align 4, !dbg !28
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store i32 %0, i32* %retval.i, align 4, !dbg !28
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br label %_Z7inlinedIiET_v.exit, !dbg !28
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if.else.i: ; preds = %entry
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store i32 97, i32* %i2.i, align 4, !dbg !23
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%1 = load i32, i32* %i2.i, align 4, !dbg !29
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store i32 %1, i32* %retval.i, align 4, !dbg !29
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br label %_Z7inlinedIiET_v.exit, !dbg !29
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_Z7inlinedIiET_v.exit: ; preds = %if.then.i, %if.else.i
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%2 = load i32, i32* %retval.i, align 4, !dbg !30
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store i32 %2, i32* %a, align 4, !dbg !25
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%3 = load i32, i32* %a, align 4, !dbg !31
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%add = add nsw i32 %3, 1, !dbg !31
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ret i32 %add, !dbg !31
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: noinline optnone ssp uwtable
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define i32 @_Z1bv() #0 !dbg !32 {
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entry:
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%retval.i = alloca i32, align 4
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%i.i = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %i.i, metadata !12, metadata !DIExpression()), !dbg !33
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%i2.i = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %i2.i, metadata !21, metadata !DIExpression()), !dbg !35
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%b = alloca i32, align 4
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call void @llvm.dbg.declare(metadata i32* %b, metadata !36, metadata !DIExpression()), !dbg !37
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%call.i = call i32 @getchar(), !dbg !38
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%cmp.i = icmp eq i32 %call.i, 97, !dbg !38
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br i1 %cmp.i, label %if.then.i, label %if.else.i, !dbg !39
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if.then.i: ; preds = %entry
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%call1.i = call i32 @getchar(), !dbg !33
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store i32 %call1.i, i32* %i.i, align 4, !dbg !33
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%0 = load i32, i32* %i.i, align 4, !dbg !40
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store i32 %0, i32* %retval.i, align 4, !dbg !40
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br label %_Z7inlinedIiET_v.exit, !dbg !40
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if.else.i: ; preds = %entry
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store i32 97, i32* %i2.i, align 4, !dbg !35
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%1 = load i32, i32* %i2.i, align 4, !dbg !41
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store i32 %1, i32* %retval.i, align 4, !dbg !41
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br label %_Z7inlinedIiET_v.exit, !dbg !41
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_Z7inlinedIiET_v.exit: ; preds = %if.then.i, %if.else.i
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%2 = load i32, i32* %retval.i, align 4, !dbg !42
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store i32 %2, i32* %b, align 4, !dbg !37
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%3 = load i32, i32* %b, align 4, !dbg !43
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%add = add nsw i32 %3, 1, !dbg !43
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ret i32 %add, !dbg !43
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}
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; Function Attrs: noinline norecurse optnone ssp uwtable
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define i32 @main() #2 !dbg !44 {
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entry:
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%retval = alloca i32, align 4
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store i32 0, i32* %retval, align 4
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%call = call i32 @_Z1av(), !dbg !45
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%call1 = call i32 @_Z1bv(), !dbg !45
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%add = add nsw i32 %call, %call1, !dbg !45
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ret i32 %add, !dbg !45
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}
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declare i32 @getchar()
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|
||||
attributes #0 = { noinline optnone ssp uwtable }
|
||||
attributes #1 = { nounwind readnone speculatable }
|
||||
attributes #2 = { noinline norecurse optnone ssp uwtable }
|
||||
|
||||
!llvm.dbg.cu = !{!0}
|
||||
!llvm.module.flags = !{!3, !4, !5, !6}
|
||||
!llvm.ident = !{!7}
|
||||
|
||||
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 (trunk 340541) (llvm/trunk 340540)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
|
||||
!1 = !DIFile(filename: "a.cpp", directory: "/tmp")
|
||||
!2 = !{}
|
||||
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
||||
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
||||
!5 = !{i32 1, !"wchar_size", i32 4}
|
||||
!6 = !{i32 7, !"PIC Level", i32 2}
|
||||
!7 = !{!"clang version 8.0.0 (trunk 340541) (llvm/trunk 340540)"}
|
||||
!8 = distinct !DISubprogram(name: "a", linkageName: "_Z1av", scope: !1, file: !1, line: 3, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
|
||||
!9 = !DISubroutineType(types: !10)
|
||||
!10 = !{!11}
|
||||
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
||||
!12 = !DILocalVariable(name: "i", scope: !13, file: !14, line: 4, type: !11)
|
||||
!13 = distinct !DILexicalBlock(scope: !15, file: !14, line: 3)
|
||||
!14 = !DIFile(filename: "./header.h", directory: "/tmp")
|
||||
!15 = distinct !DILexicalBlock(scope: !16, file: !14, line: 3)
|
||||
!16 = distinct !DISubprogram(name: "inlined<int>", linkageName: "_Z7inlinedIiET_v", scope: !14, file: !14, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, templateParams: !17, retainedNodes: !2)
|
||||
!17 = !{!18}
|
||||
!18 = !DITemplateTypeParameter(name: "T", type: !11)
|
||||
!19 = !DILocation(line: 4, scope: !13, inlinedAt: !20)
|
||||
!20 = distinct !DILocation(line: 4, scope: !8)
|
||||
!21 = !DILocalVariable(name: "i", scope: !22, file: !14, line: 7, type: !11)
|
||||
!22 = distinct !DILexicalBlock(scope: !15, file: !14, line: 6)
|
||||
!23 = !DILocation(line: 7, scope: !22, inlinedAt: !20)
|
||||
!24 = !DILocalVariable(name: "a", scope: !8, file: !1, line: 4, type: !11)
|
||||
!25 = !DILocation(line: 4, scope: !8)
|
||||
!26 = !DILocation(line: 3, scope: !15, inlinedAt: !20)
|
||||
!27 = !DILocation(line: 3, scope: !16, inlinedAt: !20)
|
||||
!28 = !DILocation(line: 5, scope: !13, inlinedAt: !20)
|
||||
!29 = !DILocation(line: 8, scope: !22, inlinedAt: !20)
|
||||
!30 = !DILocation(line: 10, scope: !16, inlinedAt: !20)
|
||||
!31 = !DILocation(line: 5, scope: !8)
|
||||
!32 = distinct !DISubprogram(name: "b", linkageName: "_Z1bv", scope: !1, file: !1, line: 8, type: !9, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
|
||||
!33 = !DILocation(line: 4, scope: !13, inlinedAt: !34)
|
||||
!34 = distinct !DILocation(line: 9, scope: !32)
|
||||
!35 = !DILocation(line: 7, scope: !22, inlinedAt: !34)
|
||||
!36 = !DILocalVariable(name: "b", scope: !32, file: !1, line: 9, type: !11)
|
||||
!37 = !DILocation(line: 9, scope: !32)
|
||||
!38 = !DILocation(line: 3, scope: !15, inlinedAt: !34)
|
||||
!39 = !DILocation(line: 3, scope: !16, inlinedAt: !34)
|
||||
!40 = !DILocation(line: 5, scope: !13, inlinedAt: !34)
|
||||
!41 = !DILocation(line: 8, scope: !22, inlinedAt: !34)
|
||||
!42 = !DILocation(line: 10, scope: !16, inlinedAt: !34)
|
||||
!43 = !DILocation(line: 10, scope: !32)
|
||||
!44 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 12, type: !9, isLocal: false, isDefinition: true, scopeLine: 12, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
|
||||
!45 = !DILocation(line: 13, scope: !44)
|
||||
@ -1,4 +1,6 @@
|
||||
#include "llvm/ADT/DenseMap.h"
|
||||
#include "llvm/ADT/StringExtras.h"
|
||||
#include "llvm/ADT/StringSet.h"
|
||||
#include "llvm/DebugInfo/DIContext.h"
|
||||
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
|
||||
#include "llvm/DebugInfo/DWARF/DWARFDebugLoc.h"
|
||||
@ -18,7 +20,7 @@ struct PerFunctionStats {
|
||||
/// Number of constants with location across all inlined instances.
|
||||
unsigned ConstantMembers = 0;
|
||||
/// List of all Variables in this function.
|
||||
SmallDenseSet<uint32_t, 4> VarsInFunction;
|
||||
StringSet<> VarsInFunction;
|
||||
/// Compile units also cover a PC range, but have this flag set to false.
|
||||
bool IsFunction = false;
|
||||
};
|
||||
@ -46,19 +48,31 @@ static uint64_t getLowPC(DWARFDie Die) {
|
||||
}
|
||||
|
||||
/// Collect debug info quality metrics for one DIE.
|
||||
static void collectStatsForDie(DWARFDie Die, std::string Prefix,
|
||||
uint64_t ScopeLowPC, uint64_t BytesInScope,
|
||||
static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
|
||||
std::string VarPrefix, uint64_t ScopeLowPC,
|
||||
uint64_t BytesInScope,
|
||||
StringMap<PerFunctionStats> &FnStatMap,
|
||||
GlobalStats &GlobalStats) {
|
||||
bool HasLoc = false;
|
||||
uint64_t BytesCovered = 0;
|
||||
uint64_t OffsetToFirstDefinition = 0;
|
||||
|
||||
if (Die.getTag() != dwarf::DW_TAG_formal_parameter &&
|
||||
Die.getTag() != dwarf::DW_TAG_variable &&
|
||||
Die.getTag() != dwarf::DW_TAG_member) {
|
||||
// Not a variable or constant member.
|
||||
return;
|
||||
}
|
||||
|
||||
if (Die.find(dwarf::DW_AT_const_value)) {
|
||||
// This catches constant members *and* variables.
|
||||
HasLoc = true;
|
||||
BytesCovered = BytesInScope;
|
||||
} else if (Die.getTag() == dwarf::DW_TAG_variable ||
|
||||
Die.getTag() == dwarf::DW_TAG_formal_parameter) {
|
||||
} else {
|
||||
if (Die.getTag() == dwarf::DW_TAG_member) {
|
||||
// Non-const member.
|
||||
return;
|
||||
}
|
||||
// Handle variables and function arguments.
|
||||
auto FormValue = Die.find(dwarf::DW_AT_location);
|
||||
HasLoc = FormValue.hasValue();
|
||||
@ -86,19 +100,17 @@ static void collectStatsForDie(DWARFDie Die, std::string Prefix,
|
||||
BytesCovered = BytesInScope;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// Not a variable or constant member.
|
||||
return;
|
||||
}
|
||||
|
||||
// Collect PC range coverage data.
|
||||
auto &FnStats = FnStatMap[Prefix];
|
||||
auto &FnStats = FnStatMap[FnPrefix];
|
||||
if (DWARFDie D =
|
||||
Die.getAttributeValueAsReferencedDie(dwarf::DW_AT_abstract_origin))
|
||||
Die = D;
|
||||
// This is a unique ID for the variable inside the current object file.
|
||||
unsigned CanonicalDieOffset = Die.getOffset();
|
||||
FnStats.VarsInFunction.insert(CanonicalDieOffset);
|
||||
// By using the variable name + the path through the lexical block tree, the
|
||||
// keys are consistent across duplicate abstract origins in different CUs.
|
||||
std::string VarName = StringRef(Die.getName(DINameKind::ShortName));
|
||||
FnStats.VarsInFunction.insert(VarPrefix+VarName);
|
||||
if (BytesInScope) {
|
||||
FnStats.TotalVarWithLoc += (unsigned)HasLoc;
|
||||
// Adjust for the fact the variables often start their lifetime in the
|
||||
@ -115,14 +127,21 @@ static void collectStatsForDie(DWARFDie Die, std::string Prefix,
|
||||
}
|
||||
|
||||
/// Recursively collect debug info quality metrics.
|
||||
static void collectStatsRecursive(DWARFDie Die, std::string Prefix,
|
||||
uint64_t ScopeLowPC, uint64_t BytesInScope,
|
||||
static void collectStatsRecursive(DWARFDie Die, std::string FnPrefix,
|
||||
std::string VarPrefix, uint64_t ScopeLowPC,
|
||||
uint64_t BytesInScope,
|
||||
StringMap<PerFunctionStats> &FnStatMap,
|
||||
GlobalStats &GlobalStats) {
|
||||
// Handle any kind of lexical scope.
|
||||
if (Die.getTag() == dwarf::DW_TAG_subprogram ||
|
||||
Die.getTag() == dwarf::DW_TAG_inlined_subroutine ||
|
||||
Die.getTag() == dwarf::DW_TAG_lexical_block) {
|
||||
|
||||
// Reset VarPrefix when entering a new function.
|
||||
if (Die.getTag() == dwarf::DW_TAG_subprogram ||
|
||||
Die.getTag() == dwarf::DW_TAG_inlined_subroutine)
|
||||
VarPrefix = "v";
|
||||
|
||||
// Ignore forward declarations.
|
||||
if (Die.find(dwarf::DW_AT_declaration))
|
||||
return;
|
||||
@ -132,7 +151,7 @@ static void collectStatsRecursive(DWARFDie Die, std::string Prefix,
|
||||
StringRef Name = Die.getName(DINameKind::LinkageName);
|
||||
if (Name.empty())
|
||||
Name = Die.getName(DINameKind::ShortName);
|
||||
Prefix = Name;
|
||||
FnPrefix = Name;
|
||||
// Skip over abstract origins.
|
||||
if (Die.find(dwarf::DW_AT_inline))
|
||||
return;
|
||||
@ -159,15 +178,20 @@ static void collectStatsRecursive(DWARFDie Die, std::string Prefix,
|
||||
BytesInScope = BytesInThisScope;
|
||||
} else {
|
||||
// Not a scope, visit the Die itself. It could be a variable.
|
||||
collectStatsForDie(Die, Prefix, ScopeLowPC, BytesInScope, FnStatMap,
|
||||
GlobalStats);
|
||||
collectStatsForDie(Die, FnPrefix, VarPrefix, ScopeLowPC, BytesInScope,
|
||||
FnStatMap, GlobalStats);
|
||||
}
|
||||
|
||||
// Traverse children.
|
||||
unsigned LexicalBlockIndex = 0;
|
||||
DWARFDie Child = Die.getFirstChild();
|
||||
while (Child) {
|
||||
collectStatsRecursive(Child, Prefix, ScopeLowPC, BytesInScope, FnStatMap,
|
||||
GlobalStats);
|
||||
std::string ChildVarPrefix = VarPrefix;
|
||||
if (Child.getTag() == dwarf::DW_TAG_lexical_block)
|
||||
ChildVarPrefix += toHex(LexicalBlockIndex++) + '.';
|
||||
|
||||
collectStatsRecursive(Child, FnPrefix, ChildVarPrefix, ScopeLowPC,
|
||||
BytesInScope, FnStatMap, GlobalStats);
|
||||
Child = Child.getSibling();
|
||||
}
|
||||
}
|
||||
@ -200,7 +224,7 @@ bool collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
|
||||
StringMap<PerFunctionStats> Statistics;
|
||||
for (const auto &CU : static_cast<DWARFContext *>(&DICtx)->compile_units())
|
||||
if (DWARFDie CUDie = CU->getUnitDIE(false))
|
||||
collectStatsRecursive(CUDie, "/", 0, 0, Statistics, GlobalStats);
|
||||
collectStatsRecursive(CUDie, "/", "g", 0, 0, Statistics, GlobalStats);
|
||||
|
||||
/// The version number should be increased every time the algorithm is changed
|
||||
/// (including bug fixes). New metrics may be added without increasing the
|
||||
@ -218,9 +242,8 @@ bool collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
|
||||
VarWithLoc += Stats.TotalVarWithLoc + Constants;
|
||||
VarTotal += TotalVars + Constants;
|
||||
VarUnique += Stats.VarsInFunction.size();
|
||||
LLVM_DEBUG(for (auto V
|
||||
: Stats.VarsInFunction) llvm::dbgs()
|
||||
<< Entry.getKey() << ": " << V << "\n");
|
||||
LLVM_DEBUG(for (auto &V : Stats.VarsInFunction) llvm::dbgs()
|
||||
<< Entry.getKey() << ": " << V.getKey() << "\n");
|
||||
NumFunctions += Stats.IsFunction;
|
||||
NumInlinedFunctions += Stats.IsFunction * Stats.NumFnInlined;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user