d275a06487
Summary: AutoFDO compilation has two places that do inlining - the sample profile loader that does inlining with context sensitive profile, and the regular inliner as CGSCC pass. Ideally we want most inlining to come from sample profile loader as that is driven by context sensitive profile and also retains context sensitivity after inlining. However the reality is most of the inlining actually happens during regular inliner. To track the number of inline instances from sample profile loader and help move more inlining to sample profile loader, I'm adding statistics and optimization remarks for sample profile loader's inlining. Reviewers: wmi, davidxl Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D70584
104 lines
4.2 KiB
LLVM
104 lines
4.2 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/inline.prof -stats -S 2>&1 | FileCheck %s
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; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/inline.prof -stats -S 2>&1 | FileCheck %s
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; Original C++ test case
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;
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; #include <stdio.h>
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;
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; int sum(int x, int y) {
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; return x + y;
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; }
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;
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; int main() {
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; int s, i = 0;
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; while (i++ < 20000 * 20000)
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; if (i != 100) s = sum(i, s); else s = 30;
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; printf("sum is %d\n", s);
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; return 0;
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; }
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;
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@.str = private unnamed_addr constant [11 x i8] c"sum is %d\0A\00", align 1
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define i32 @_Z3sumii(i32 %x, i32 %y) !dbg !6 {
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entry:
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%x.addr = alloca i32, align 4
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%y.addr = alloca i32, align 4
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store i32 %x, i32* %x.addr, align 4
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store i32 %y, i32* %y.addr, align 4
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%tmp = load i32, i32* %x.addr, align 4, !dbg !8
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%tmp1 = load i32, i32* %y.addr, align 4, !dbg !8
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%add = add nsw i32 %tmp, %tmp1, !dbg !8
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ret i32 %add, !dbg !8
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}
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define i32 @main() !dbg !9 {
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entry:
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%retval = alloca i32, align 4
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%s = alloca i32, align 4
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%i = alloca i32, align 4
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store i32 0, i32* %retval
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store i32 0, i32* %i, align 4, !dbg !10
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br label %while.cond, !dbg !11
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while.cond: ; preds = %if.end, %entry
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%tmp = load i32, i32* %i, align 4, !dbg !12
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%inc = add nsw i32 %tmp, 1, !dbg !12
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store i32 %inc, i32* %i, align 4, !dbg !12
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%cmp = icmp slt i32 %tmp, 400000000, !dbg !12
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br i1 %cmp, label %while.body, label %while.end, !dbg !12
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while.body: ; preds = %while.cond
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%tmp1 = load i32, i32* %i, align 4, !dbg !14
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%cmp1 = icmp ne i32 %tmp1, 100, !dbg !14
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br i1 %cmp1, label %if.then, label %if.else, !dbg !14
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if.then: ; preds = %while.body
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%tmp2 = load i32, i32* %i, align 4, !dbg !16
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%tmp3 = load i32, i32* %s, align 4, !dbg !16
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%call = call i32 @_Z3sumii(i32 %tmp2, i32 %tmp3), !dbg !16
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store i32 %call, i32* %s, align 4, !dbg !16
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br label %if.end, !dbg !16
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if.else: ; preds = %while.body
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store i32 30, i32* %s, align 4, !dbg !18
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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br label %while.cond, !dbg !20
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while.end: ; preds = %while.cond
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%tmp4 = load i32, i32* %s, align 4, !dbg !22
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%call2 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i32 %tmp4), !dbg !22
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ret i32 0, !dbg !23
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}
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declare i32 @printf(i8*, ...)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.5 ", isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "calls.cc", directory: ".")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 1, !"Debug Info Version", i32 3}
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!5 = !{!"clang version 3.5 "}
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!6 = distinct !DISubprogram(name: "sum", scope: !1, file: !1, line: 3, type: !7, scopeLine: 3, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!7 = !DISubroutineType(types: !2)
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!8 = !DILocation(line: 4, scope: !6)
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!9 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 7, type: !7, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
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!10 = !DILocation(line: 8, scope: !9)
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!11 = !DILocation(line: 9, scope: !9)
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!12 = !DILocation(line: 9, scope: !13)
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!13 = !DILexicalBlockFile(scope: !9, file: !1, discriminator: 2)
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!14 = !DILocation(line: 10, scope: !15)
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!15 = distinct !DILexicalBlock(scope: !9, file: !1, line: 10)
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!16 = !DILocation(line: 10, scope: !17)
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!17 = !DILexicalBlockFile(scope: !15, file: !1, discriminator: 2)
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!18 = !DILocation(line: 10, scope: !19)
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!19 = !DILexicalBlockFile(scope: !15, file: !1, discriminator: 4)
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!20 = !DILocation(line: 10, scope: !21)
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!21 = !DILexicalBlockFile(scope: !15, file: !1, discriminator: 6)
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!22 = !DILocation(line: 11, scope: !9)
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!23 = !DILocation(line: 12, scope: !9)
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; CHECK: 1 sample-profile - Number of functions inlined with context sensitive profile |