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clang-p2996/llvm/test/Transforms/SampleProfile/remarks.ll
Wenlei He 7c8a6936bf [Remarks] Add callsite locations to inline remarks 
Summary:
Add call site location info into inline remarks so we can differentiate inline sites.
This can be useful for inliner tuning. We can also reconstruct full hierarchical inline
tree from parsing such remarks. The messege of inline remark is also tweaked so we can
differentiate SampleProfileLoader inline from CGSCC inline.

Reviewers: wmi, davidxl, hoy

Subscribers: hiraditya, cfe-commits, llvm-commits

Tags: #clang, #llvm

Differential Revision: https://reviews.llvm.org/D82213
2020-06-20 23:32:10 -07:00

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; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/remarks.prof -S -pass-remarks=sample-profile -pass-remarks-output=%t.opt.yaml 2>&1 | FileCheck %s
; RUN: FileCheck %s -check-prefix=YAML < %t.opt.yaml
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/remarks.prof -S -pass-remarks=sample-profile -pass-remarks-output=%t.opt.yaml 2>&1 | FileCheck %s
; RUN: FileCheck %s -check-prefix=YAML < %t.opt.yaml
; Original test case.
;
; 1 #include <stdlib.h>
; 2
; 3 long long foo() {
; 4 long long int sum = 0;
; 5 for (int i = 0; i < 500000000; i++)
; 6 if (i < 1000)
; 7 sum -= i;
; 8 else
; 9 sum += -i * rand();
; 10 return sum;
; 11 }
; 12
; 13 int main() { return foo() > 0; }
; We are expecting foo() to be inlined in main() (almost all the cycles are
; spent inside foo).
; CHECK: remark: remarks.cc:13:21: _Z3foov inlined into main to match profiling context with (cost=130, threshold=225) at callsite main:0
; CHECK: remark: remarks.cc:9:19: rand inlined into main to match profiling context with (cost=always): always inline attribute at callsite _Z3foov:6 @ main:0
; The back edge for the loop is the hottest edge in the loop subgraph.
; CHECK: remark: remarks.cc:6:9: most popular destination for conditional branches at remarks.cc:5:3
; The predicate almost always chooses the 'else' branch.
; CHECK: remark: remarks.cc:9:15: most popular destination for conditional branches at remarks.cc:6:9
; Checking to see if YAML file is generated and contains remarks
;YAML: --- !Passed
;YAML-NEXT: Pass: sample-profile-inline
;YAML-NEXT: Name: Inlined
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 13, Column: 21 }
;YAML-NEXT: Function: main
;YAML-NEXT: Args:
;YAML-NEXT: - Callee: _Z3foov
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 3, Column: 0 }
;YAML-NEXT: - String: ' inlined into '
;YAML-NEXT: - Caller: main
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 13, Column: 0 }
;YAML-NEXT: - String: ' to match profiling context'
;YAML-NEXT: - String: ' with '
;YAML-NEXT: - String: '(cost='
;YAML-NEXT: - Cost: '130'
;YAML-NEXT: - String: ', threshold='
;YAML-NEXT: - Threshold: '225'
;YAML-NEXT: - String: ')'
;YAML-NEXT: - String: ' at callsite '
;YAML-NEXT: - String: main
;YAML-NEXT: - String: ':'
;YAML-NEXT: - Line: '0'
;YAML-NEXT: ...
;YAML: --- !Passed
;YAML-NEXT: Pass: sample-profile-inline
;YAML-NEXT: Name: AlwaysInline
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 9, Column: 19 }
;YAML-NEXT: Function: main
;YAML-NEXT: Args:
;YAML-NEXT: - Callee: rand
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 90, Column: 0 }
;YAML-NEXT: - String: ' inlined into '
;YAML-NEXT: - Caller: main
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 13, Column: 0 }
;YAML-NEXT: - String: ' to match profiling context'
;YAML-NEXT: - String: ' with '
;YAML-NEXT: - String: '(cost=always)'
;YAML-NEXT: - String: ': '
;YAML-NEXT: - Reason: always inline attribute
;YAML-NEXT: - String: ' at callsite '
;YAML-NEXT: - String: _Z3foov
;YAML-NEXT: - String: ':'
;YAML-NEXT: - Line: '6'
;YAML-NEXT: - String: ' @ '
;YAML-NEXT: - String: main
;YAML-NEXT: - String: ':'
;YAML-NEXT: - Line: '0'
;YAML: --- !Analysis
;YAML-NEXT: Pass: sample-profile
;YAML-NEXT: Name: AppliedSamples
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 5, Column: 8 }
;YAML-NEXT: Function: main
;YAML-NEXT: Args:
;YAML-NEXT: - String: 'Applied '
;YAML-NEXT: - NumSamples: '18305'
;YAML-NEXT: - String: ' samples from profile (offset: '
;YAML-NEXT: - LineOffset: '2'
;YAML-NEXT: - String: ')'
;YAML-NEXT: ...
;YAML: --- !Passed
;YAML-NEXT: Pass: sample-profile
;YAML-NEXT: Name: PopularDest
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 6, Column: 9 }
;YAML-NEXT: Function: main
;YAML-NEXT: Args:
;YAML-NEXT: - String: 'most popular destination for conditional branches at '
;YAML-NEXT: - CondBranchesLoc: 'remarks.cc:5:3'
;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 5, Column: 3 }
;YAML-NEXT: ...
; Function Attrs: nounwind uwtable
define i64 @_Z3foov() #0 !dbg !4 {
entry:
%sum = alloca i64, align 8
%i = alloca i32, align 4
%0 = bitcast i64* %sum to i8*, !dbg !19
call void @llvm.lifetime.start.p0i8(i64 8, i8* %0) #4, !dbg !19
call void @llvm.dbg.declare(metadata i64* %sum, metadata !9, metadata !20), !dbg !21
store i64 0, i64* %sum, align 8, !dbg !21, !tbaa !22
%1 = bitcast i32* %i to i8*, !dbg !26
call void @llvm.lifetime.start.p0i8(i64 4, i8* %1) #4, !dbg !26
call void @llvm.dbg.declare(metadata i32* %i, metadata !10, metadata !20), !dbg !27
store i32 0, i32* %i, align 4, !dbg !27, !tbaa !28
br label %for.cond, !dbg !26
for.cond: ; preds = %for.inc, %entry
%2 = load i32, i32* %i, align 4, !dbg !30, !tbaa !28
%cmp = icmp slt i32 %2, 500000000, !dbg !34
br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !35
for.cond.cleanup: ; preds = %for.cond
%3 = bitcast i32* %i to i8*, !dbg !36
call void @llvm.lifetime.end.p0i8(i64 4, i8* %3) #4, !dbg !36
br label %for.end
for.body: ; preds = %for.cond
%4 = load i32, i32* %i, align 4, !dbg !38, !tbaa !28
%cmp1 = icmp slt i32 %4, 1000, !dbg !40
br i1 %cmp1, label %if.then, label %if.else, !dbg !41
if.then: ; preds = %for.body
%5 = load i32, i32* %i, align 4, !dbg !42, !tbaa !28
%conv = sext i32 %5 to i64, !dbg !42
%6 = load i64, i64* %sum, align 8, !dbg !43, !tbaa !22
%sub = sub nsw i64 %6, %conv, !dbg !43
store i64 %sub, i64* %sum, align 8, !dbg !43, !tbaa !22
br label %if.end, !dbg !44
if.else: ; preds = %for.body
%7 = load i32, i32* %i, align 4, !dbg !45, !tbaa !28
%sub2 = sub nsw i32 0, %7, !dbg !46
%call = call i32 @rand() #4, !dbg !47
%mul = mul nsw i32 %sub2, %call, !dbg !48
%conv3 = sext i32 %mul to i64, !dbg !46
%8 = load i64, i64* %sum, align 8, !dbg !49, !tbaa !22
%add = add nsw i64 %8, %conv3, !dbg !49
store i64 %add, i64* %sum, align 8, !dbg !49, !tbaa !22
br label %if.end
if.end: ; preds = %if.else, %if.then
br label %for.inc, !dbg !50
for.inc: ; preds = %if.end
%9 = load i32, i32* %i, align 4, !dbg !51, !tbaa !28
%inc = add nsw i32 %9, 1, !dbg !51
store i32 %inc, i32* %i, align 4, !dbg !51, !tbaa !28
br label %for.cond, !dbg !52
for.end: ; preds = %for.cond.cleanup
%10 = load i64, i64* %sum, align 8, !dbg !53, !tbaa !22
%11 = bitcast i64* %sum to i8*, !dbg !54
call void @llvm.lifetime.end.p0i8(i64 8, i8* %11) #4, !dbg !54
ret i64 %10, !dbg !55
}
; Function Attrs: nounwind argmemonly
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
; Function Attrs: nounwind
define i32 @rand() #3 !dbg !59 {
ret i32 1
}
; Function Attrs: nounwind argmemonly
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
; Function Attrs: nounwind uwtable
define i32 @main() #0 !dbg !13 {
entry:
%retval = alloca i32, align 4
store i32 0, i32* %retval, align 4
%call = call i64 @_Z3foov(), !dbg !56
%cmp = icmp sgt i64 %call, 0, !dbg !57
%conv = zext i1 %cmp to i32, !dbg !56
ret i32 %conv, !dbg !58
}
attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" "use-sample-profile" }
attributes #1 = { nounwind argmemonly }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind alwaysinline "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #4 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!16, !17}
!llvm.ident = !{!18}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 251041) (llvm/trunk 251053)", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
!1 = !DIFile(filename: "remarks.cc", directory: ".")
!2 = !{}
!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
!5 = !DISubroutineType(types: !6)
!6 = !{!7}
!7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
!8 = !{!9, !10}
!9 = !DILocalVariable(name: "sum", scope: !4, file: !1, line: 4, type: !7)
!10 = !DILocalVariable(name: "i", scope: !11, file: !1, line: 5, type: !12)
!11 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 3)
!12 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!13 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 13, type: !14, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
!14 = !DISubroutineType(types: !15)
!15 = !{!12}
!16 = !{i32 2, !"Dwarf Version", i32 4}
!17 = !{i32 2, !"Debug Info Version", i32 3}
!18 = !{!"clang version 3.8.0 (trunk 251041) (llvm/trunk 251053)"}
!19 = !DILocation(line: 4, column: 3, scope: !4)
!20 = !DIExpression()
!21 = !DILocation(line: 4, column: 17, scope: !4)
!22 = !{!23, !23, i64 0}
!23 = !{!"long long", !24, i64 0}
!24 = !{!"omnipotent char", !25, i64 0}
!25 = !{!"Simple C/C++ TBAA"}
!26 = !DILocation(line: 5, column: 8, scope: !11)
!27 = !DILocation(line: 5, column: 12, scope: !11)
!28 = !{!29, !29, i64 0}
!29 = !{!"int", !24, i64 0}
!30 = !DILocation(line: 5, column: 19, scope: !31)
!31 = !DILexicalBlockFile(scope: !32, file: !1, discriminator: 3)
!32 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 1)
!33 = distinct !DILexicalBlock(scope: !11, file: !1, line: 5, column: 3)
!34 = !DILocation(line: 5, column: 21, scope: !33)
!35 = !DILocation(line: 5, column: 3, scope: !11)
!36 = !DILocation(line: 5, column: 3, scope: !37)
!37 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 2)
!38 = !DILocation(line: 6, column: 9, scope: !39)
!39 = distinct !DILexicalBlock(scope: !33, file: !1, line: 6, column: 9)
!40 = !DILocation(line: 6, column: 11, scope: !39)
!41 = !DILocation(line: 6, column: 9, scope: !33)
!42 = !DILocation(line: 7, column: 14, scope: !39)
!43 = !DILocation(line: 7, column: 11, scope: !39)
!44 = !DILocation(line: 7, column: 7, scope: !39)
!45 = !DILocation(line: 9, column: 15, scope: !39)
!46 = !DILocation(line: 9, column: 14, scope: !39)
!47 = !DILocation(line: 9, column: 19, scope: !39)
!48 = !DILocation(line: 9, column: 17, scope: !39)
!49 = !DILocation(line: 9, column: 11, scope: !39)
!50 = !DILocation(line: 6, column: 13, scope: !39)
!51 = !DILocation(line: 5, column: 35, scope: !33)
!52 = !DILocation(line: 5, column: 3, scope: !33)
!53 = !DILocation(line: 10, column: 10, scope: !4)
!54 = !DILocation(line: 11, column: 1, scope: !4)
!55 = !DILocation(line: 10, column: 3, scope: !4)
!56 = !DILocation(line: 13, column: 21, scope: !13)
!57 = !DILocation(line: 13, column: 27, scope: !13)
!58 = !DILocation(line: 13, column: 14, scope: !13)
!59 = distinct !DISubprogram(name: "rand", linkageName: "rand", scope: !1, file: !1, line: 90, type: !5, isLocal: false, isDefinition: true, scopeLine: 90, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
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