Index: llvm/include/llvm/Transforms/IPO/Inliner.h =================================================================== --- llvm/include/llvm/Transforms/IPO/Inliner.h +++ llvm/include/llvm/Transforms/IPO/Inliner.h @@ -14,6 +14,7 @@ #include "llvm/Analysis/InlineAdvisor.h" #include "llvm/Analysis/InlineCost.h" #include "llvm/Analysis/LazyCallGraph.h" +#include "llvm/Analysis/ReplayInlineAdvisor.h" #include "llvm/IR/PassManager.h" #include "llvm/Transforms/Utils/ImportedFunctionsInliningStatistics.h" #include @@ -109,6 +110,8 @@ FunctionAnalysisManager &FAM, Module &M); std::unique_ptr ImportedFunctionsStats; Optional OwnedDefaultAdvisor; + // External inline advisor used to replay inline decision from remarks. + Optional ReplayAdvisor; }; /// Module pass, wrapping the inliner pass. This works in conjunction with the Index: llvm/lib/Transforms/IPO/Inliner.cpp =================================================================== --- llvm/lib/Transforms/IPO/Inliner.cpp +++ llvm/lib/Transforms/IPO/Inliner.cpp @@ -90,6 +90,13 @@ DisableInlinedAllocaMerging("disable-inlined-alloca-merging", cl::init(false), cl::Hidden); +static cl::opt CGSCCInlineReplayFile( + "cgscc-inline-replay", cl::init(""), cl::value_desc("filename"), + cl::desc( + "Optimization remarks file containing inline remarks to be replayed " + "by inlining from cgscc inline remarks."), + cl::Hidden); + namespace { enum class InlinerFunctionImportStatsOpts { @@ -658,6 +665,15 @@ InlineAdvisor & InlinerPass::getAdvisor(const ModuleAnalysisManagerCGSCCProxy::Result &MAM, FunctionAnalysisManager &FAM, Module &M) { + + if (!CGSCCInlineReplayFile.empty()) { + if (!ReplayAdvisor) + ReplayAdvisor.emplace(FAM, M.getContext(), CGSCCInlineReplayFile, + /* EmitRemarks =*/true); + + return *ReplayAdvisor; + } + auto *IAA = MAM.getCachedResult(M); if (!IAA) { // It should still be possible to run the inliner as a stand-alone SCC pass, Index: llvm/test/Transforms/Inline/Inputs/cgscc-inline-replay.txt =================================================================== --- /dev/null +++ llvm/test/Transforms/Inline/Inputs/cgscc-inline-replay.txt @@ -0,0 +1,2 @@ +remark: calls.cc:10:0: _Z3sumii inlined into main with (cost=45, threshold=337) at callsite main:3:0.1; +remark: calls.cc:4:0: _Z3subii inlined into main with (cost=-5, threshold=337) at callsite _Z3sumii:1:0 @ main:3:0.1; Index: llvm/test/Transforms/Inline/cgscc-inline-replay.ll =================================================================== --- /dev/null +++ llvm/test/Transforms/Inline/cgscc-inline-replay.ll @@ -0,0 +1,119 @@ +;; Note that this needs new pass manager for now. Passing `-cgscc-inline-replay` to legacy pass manager is a no-op. + +;; Check replay inline decisions +; RUN: opt < %s -passes=inline -pass-remarks=inline -S 2>&1 | FileCheck -check-prefix=DEFAULT %s +; RUN: opt < %s -passes=inline -cgscc-inline-replay=%S/Inputs/cgscc-inline-replay.txt -pass-remarks=inline -S 2>&1 | FileCheck -check-prefix=REPLAY %s + +@.str = private unnamed_addr constant [11 x i8] c"sum is %d\0A\00", align 1 + +define i32 @_Z3sumii(i32 %x, i32 %y) #0 !dbg !6 { +entry: + %x.addr = alloca i32, align 4 + %y.addr = alloca i32, align 4 + store i32 %x, i32* %x.addr, align 4 + store i32 %y, i32* %y.addr, align 4 + %tmp = load i32, i32* %x.addr, align 4, !dbg !8 + %tmp1 = load i32, i32* %y.addr, align 4, !dbg !8 + %add = add nsw i32 %tmp, %tmp1, !dbg !8 + %tmp2 = load i32, i32* %x.addr, align 4, !dbg !8 + %tmp3 = load i32, i32* %y.addr, align 4, !dbg !8 + %call = call i32 @_Z3subii(i32 %tmp2, i32 %tmp3), !dbg !8 + ret i32 %add, !dbg !8 +} + +define i32 @_Z3subii(i32 %x, i32 %y) #0 !dbg !9 { +entry: + %x.addr = alloca i32, align 4 + %y.addr = alloca i32, align 4 + store i32 %x, i32* %x.addr, align 4 + store i32 %y, i32* %y.addr, align 4 + %tmp = load i32, i32* %x.addr, align 4, !dbg !10 + %tmp1 = load i32, i32* %y.addr, align 4, !dbg !10 + %add = sub nsw i32 %tmp, %tmp1, !dbg !10 + ret i32 %add, !dbg !11 +} + +define i32 @main() #0 !dbg !12 { +entry: + %retval = alloca i32, align 4 + %s = alloca i32, align 4 + %i = alloca i32, align 4 + store i32 0, i32* %retval + store i32 0, i32* %i, align 4, !dbg !13 + br label %while.cond, !dbg !14 + +while.cond: ; preds = %if.end, %entry + %tmp = load i32, i32* %i, align 4, !dbg !15 + %inc = add nsw i32 %tmp, 1, !dbg !15 + store i32 %inc, i32* %i, align 4, !dbg !15 + %cmp = icmp slt i32 %tmp, 400000000, !dbg !15 + br i1 %cmp, label %while.body, label %while.end, !dbg !15 + +while.body: ; preds = %while.cond + %tmp1 = load i32, i32* %i, align 4, !dbg !17 + %cmp1 = icmp ne i32 %tmp1, 100, !dbg !17 + br i1 %cmp1, label %if.then, label %if.else, !dbg !17 + +if.then: ; preds = %while.body + %tmp2 = load i32, i32* %i, align 4, !dbg !19 + %tmp3 = load i32, i32* %s, align 4, !dbg !19 + %call = call i32 @_Z3sumii(i32 %tmp2, i32 %tmp3), !dbg !19 + store i32 %call, i32* %s, align 4, !dbg !19 + br label %if.end, !dbg !19 + +if.else: ; preds = %while.body + store i32 30, i32* %s, align 4, !dbg !21 + br label %if.end + +if.end: ; preds = %if.else, %if.then + br label %while.cond, !dbg !23 + +while.end: ; preds = %while.cond + %tmp4 = load i32, i32* %s, align 4, !dbg !25 + %call2 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i32 %tmp4), !dbg !25 + ret i32 0, !dbg !26 +} + +declare i32 @printf(i8*, ...) + +attributes #0 = { "use-sample-profile" } + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!3, !4} +!llvm.ident = !{!5} + +!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) +!1 = !DIFile(filename: "calls.cc", directory: ".") +!2 = !{} +!3 = !{i32 2, !"Dwarf Version", i32 4} +!4 = !{i32 1, !"Debug Info Version", i32 3} +!5 = !{!"clang version 3.5 "} +!6 = distinct !DISubprogram(name: "sum", linkageName: "_Z3sumii", scope: !1, file: !1, line: 3, type: !7, scopeLine: 3, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) +!7 = !DISubroutineType(types: !2) +!8 = !DILocation(line: 4, scope: !6) +!9 = distinct !DISubprogram(name: "sub", linkageName: "_Z3subii", scope: !1, file: !1, line: 20, type: !7, scopeLine: 20, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) +!10 = !DILocation(line: 20, scope: !9) +!11 = !DILocation(line: 21, scope: !9) +!12 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 7, type: !7, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) +!13 = !DILocation(line: 8, scope: !12) +!14 = !DILocation(line: 9, scope: !12) +!15 = !DILocation(line: 9, scope: !16) +!16 = !DILexicalBlockFile(scope: !12, file: !1, discriminator: 2) +!17 = !DILocation(line: 10, scope: !18) +!18 = distinct !DILexicalBlock(scope: !12, file: !1, line: 10) +!19 = !DILocation(line: 10, scope: !20) +!20 = !DILexicalBlockFile(scope: !18, file: !1, discriminator: 2) +!21 = !DILocation(line: 10, scope: !22) +!22 = !DILexicalBlockFile(scope: !18, file: !1, discriminator: 4) +!23 = !DILocation(line: 10, scope: !24) +!24 = !DILexicalBlockFile(scope: !18, file: !1, discriminator: 6) +!25 = !DILocation(line: 11, scope: !12) +!26 = !DILocation(line: 12, scope: !12) + +; DEFAULT: _Z3subii inlined into _Z3sumii +; DEFAULT: _Z3sumii inlined into main +; DEFAULT-NOT: _Z3subii inlined into main + +; REPLAY: _Z3sumii inlined into main +; REPLAY: _Z3subii inlined into main +; REPLAY-NOT: _Z3subii inlined into _Z3sumii