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llvm-project/llvm/test/Transforms/SampleProfile/offset.ll

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Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/offset.prof | opt -analyze -branch-prob | FileCheck %s
; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/offset.prof | opt -analyze -branch-prob | FileCheck %s
; Original C++ code for this test case:
;
; a.cc:
; #1
; #2
; #3
; #4
; #5 int foo(int a) {
; #6 #include "a.b"
; #7}
;
; a.b:
; #1 if (a > 0) {
; #2 return 10;
; #3 } else {
; #4 return 20;
; #5 }
; Function Attrs: nounwind uwtable
define i32 @_Z3fooi(i32 %a) #0 !dbg !4 {
entry:
%retval = alloca i32, align 4
%a.addr = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
call void @llvm.dbg.declare(metadata i32* %a.addr, metadata !11, metadata !12), !dbg !13
%0 = load i32, i32* %a.addr, align 4, !dbg !14
%cmp = icmp sgt i32 %0, 0, !dbg !18
br i1 %cmp, label %if.then, label %if.else, !dbg !19
; CHECK: edge entry -> if.then probability is 0x0167ba82 / 0x80000000 = 1.10%
; CHECK: edge entry -> if.else probability is 0x7e98457e / 0x80000000 = 98.90% [HOT edge]
if.then: ; preds = %entry
store i32 10, i32* %retval, align 4, !dbg !20
br label %return, !dbg !20
if.else: ; preds = %entry
store i32 20, i32* %retval, align 4, !dbg !22
br label %return, !dbg !22
return: ; preds = %if.else, %if.then
%1 = load i32, i32* %retval, align 4, !dbg !24
ret i32 %1, !dbg !24
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
[SampleFDO] Add use-sample-profile function attribute. When sampleFDO is enabled, people may expect they can use -fno-profile-sample-use to opt-out using sample profile for a certain file. That could be either for debugging purpose or for performance tuning purpose. However, when thinlto is enabled, if a function in file A compiled with -fno-profile-sample-use is imported to another file B compiled with -fprofile-sample-use, the inlined copy of the function in file B may still get its profile annotated. The inconsistency may even introduce profile unused warning because if the target is not compiled with explicit debug information flag, the function in file A won't have its debug information enabled (debug information will be enabled implicitly only when -fprofile-sample-use is used). After it is imported into file B which is compiled with -fprofile-sample-use, profile annotation for the outline copy of the function will fail because the function has no debug information, and that will trigger profile unused warning. We add a new attribute use-sample-profile to control whether a function will use its sample profile no matter for its outline or inline copies. That will make the behavior of -fno-profile-sample-use consistent. Differential Revision: https://reviews.llvm.org/D79959
2020-05-15 03:05:49 +08:00
attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "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" }
Revert "Temporarily Revert "Add basic loop fusion pass."" The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
2019-04-17 12:52:47 +08:00
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!8, !9}
!llvm.ident = !{!10}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 250750)", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
!1 = !DIFile(filename: "a.cc", directory: "/tmp")
!2 = !{}
!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooi", scope: !1, file: !1, line: 5, type: !5, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !7}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !{i32 2, !"Dwarf Version", i32 4}
!9 = !{i32 2, !"Debug Info Version", i32 3}
!10 = !{!"clang version 3.8.0 (trunk 250750)"}
!11 = !DILocalVariable(name: "a", arg: 1, scope: !4, file: !1, line: 5, type: !7)
!12 = !DIExpression()
!13 = !DILocation(line: 5, column: 13, scope: !4)
!14 = !DILocation(line: 1, column: 5, scope: !15)
!15 = distinct !DILexicalBlock(scope: !17, file: !16, line: 1, column: 5)
!16 = !DIFile(filename: "./a.b", directory: "/tmp")
!17 = !DILexicalBlockFile(scope: !4, file: !16, discriminator: 0)
!18 = !DILocation(line: 1, column: 7, scope: !15)
!19 = !DILocation(line: 1, column: 5, scope: !17)
!20 = !DILocation(line: 2, column: 3, scope: !21)
!21 = distinct !DILexicalBlock(scope: !15, file: !16, line: 1, column: 12)
!22 = !DILocation(line: 4, column: 3, scope: !23)
!23 = distinct !DILexicalBlock(scope: !15, file: !16, line: 3, column: 8)
!24 = !DILocation(line: 7, column: 1, scope: !25)
!25 = !DILexicalBlockFile(scope: !4, file: !1, discriminator: 0)