[llvm] [ThinLTO]Record import type (declaration or definition) in GlobalValueSummary::GVFlags (PR #87597)
Mingming Liu via llvm-commits
llvm-commits at lists.llvm.org
Mon Apr 8 23:00:23 PDT 2024
https://github.com/minglotus-6 updated https://github.com/llvm/llvm-project/pull/87597
>From 78fa2e09ac19594baced9dfd27b4ae196f087056 Mon Sep 17 00:00:00 2001
From: mingmingl <mingmingl at google.com>
Date: Wed, 3 Apr 2024 21:45:50 -0700
Subject: [PATCH 1/3] [ThinLTO]Record import type (declaration or definition)
in GlobalValueSummary::GVFlags
- This change doesn't set the bit in the summaries, just make the code changes.
---
llvm/include/llvm/AsmParser/LLToken.h | 1 +
llvm/include/llvm/IR/ModuleSummaryIndex.h | 14 +++++++++++---
llvm/include/llvm/IR/ModuleSummaryIndexYAML.h | 7 ++++---
llvm/lib/Analysis/ModuleSummaryAnalysis.cpp | 12 ++++++++----
llvm/lib/AsmParser/LLParser.cpp | 15 ++++++++++++---
llvm/lib/Bitcode/Reader/BitcodeReader.cpp | 3 ++-
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 5 ++++-
7 files changed, 42 insertions(+), 15 deletions(-)
diff --git a/llvm/include/llvm/AsmParser/LLToken.h b/llvm/include/llvm/AsmParser/LLToken.h
index 65ccb1b81b3a87..21229683f2496b 100644
--- a/llvm/include/llvm/AsmParser/LLToken.h
+++ b/llvm/include/llvm/AsmParser/LLToken.h
@@ -370,6 +370,7 @@ enum Kind {
kw_live,
kw_dsoLocal,
kw_canAutoHide,
+ kw_importAsDec,
kw_function,
kw_insts,
kw_funcFlags,
diff --git a/llvm/include/llvm/IR/ModuleSummaryIndex.h b/llvm/include/llvm/IR/ModuleSummaryIndex.h
index d5ff15063671d8..7eba77540fa7ea 100644
--- a/llvm/include/llvm/IR/ModuleSummaryIndex.h
+++ b/llvm/include/llvm/IR/ModuleSummaryIndex.h
@@ -472,14 +472,20 @@ class GlobalValueSummary {
/// means the symbol was externally visible.
unsigned CanAutoHide : 1;
+ /// This field is written by the ThinLTO indexing step to postlink
+ /// per-module summary. It indicates whether a global value (function or
+ /// function alias, etc) should be imported as a definition or declaration.
+ unsigned ImportAsDec : 1;
+
/// Convenience Constructors
explicit GVFlags(GlobalValue::LinkageTypes Linkage,
GlobalValue::VisibilityTypes Visibility,
bool NotEligibleToImport, bool Live, bool IsLocal,
- bool CanAutoHide)
+ bool CanAutoHide, bool ImportAsDec)
: Linkage(Linkage), Visibility(Visibility),
NotEligibleToImport(NotEligibleToImport), Live(Live),
- DSOLocal(IsLocal), CanAutoHide(CanAutoHide) {}
+ DSOLocal(IsLocal), CanAutoHide(CanAutoHide),
+ ImportAsDec(ImportAsDec) {}
};
private:
@@ -564,6 +570,8 @@ class GlobalValueSummary {
bool canAutoHide() const { return Flags.CanAutoHide; }
+ bool shouldImportAsDec() const { return Flags.ImportAsDec; }
+
GlobalValue::VisibilityTypes getVisibility() const {
return (GlobalValue::VisibilityTypes)Flags.Visibility;
}
@@ -813,7 +821,7 @@ class FunctionSummary : public GlobalValueSummary {
GlobalValue::LinkageTypes::AvailableExternallyLinkage,
GlobalValue::DefaultVisibility,
/*NotEligibleToImport=*/true, /*Live=*/true, /*IsLocal=*/false,
- /*CanAutoHide=*/false),
+ /*CanAutoHide=*/false, /*ImportAsDec=*/false),
/*NumInsts=*/0, FunctionSummary::FFlags{}, /*EntryCount=*/0,
std::vector<ValueInfo>(), std::move(Edges),
std::vector<GlobalValue::GUID>(),
diff --git a/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h b/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
index 33e57e5f2102fd..21dddcf0c03dcd 100644
--- a/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
+++ b/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
@@ -137,7 +137,7 @@ template <> struct MappingTraits<TypeIdSummary> {
struct FunctionSummaryYaml {
unsigned Linkage, Visibility;
- bool NotEligibleToImport, Live, IsLocal, CanAutoHide;
+ bool NotEligibleToImport, Live, IsLocal, CanAutoHide, ImportAsDec;
std::vector<uint64_t> Refs;
std::vector<uint64_t> TypeTests;
std::vector<FunctionSummary::VFuncId> TypeTestAssumeVCalls,
@@ -227,7 +227,7 @@ template <> struct CustomMappingTraits<GlobalValueSummaryMapTy> {
static_cast<GlobalValue::LinkageTypes>(FSum.Linkage),
static_cast<GlobalValue::VisibilityTypes>(FSum.Visibility),
FSum.NotEligibleToImport, FSum.Live, FSum.IsLocal,
- FSum.CanAutoHide),
+ FSum.CanAutoHide, FSum.ImportAsDec),
/*NumInsts=*/0, FunctionSummary::FFlags{}, /*EntryCount=*/0, Refs,
ArrayRef<FunctionSummary::EdgeTy>{}, std::move(FSum.TypeTests),
std::move(FSum.TypeTestAssumeVCalls),
@@ -251,7 +251,8 @@ template <> struct CustomMappingTraits<GlobalValueSummaryMapTy> {
static_cast<bool>(FSum->flags().NotEligibleToImport),
static_cast<bool>(FSum->flags().Live),
static_cast<bool>(FSum->flags().DSOLocal),
- static_cast<bool>(FSum->flags().CanAutoHide), Refs,
+ static_cast<bool>(FSum->flags().CanAutoHide),
+ static_cast<bool>(FSum->flags().ImportAsDec), Refs,
FSum->type_tests(), FSum->type_test_assume_vcalls(),
FSum->type_checked_load_vcalls(),
FSum->type_test_assume_const_vcalls(),
diff --git a/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp b/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
index 3ad0bab827a512..eb81de81e476dd 100644
--- a/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
+++ b/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
@@ -635,7 +635,8 @@ static void computeFunctionSummary(
HasIndirBranchToBlockAddress || HasIFuncCall;
GlobalValueSummary::GVFlags Flags(
F.getLinkage(), F.getVisibility(), NotEligibleForImport,
- /* Live = */ false, F.isDSOLocal(), F.canBeOmittedFromSymbolTable());
+ /* Live = */ false, F.isDSOLocal(), F.canBeOmittedFromSymbolTable(),
+ /*ImportAsDec=*/false);
FunctionSummary::FFlags FunFlags{
F.doesNotAccessMemory(), F.onlyReadsMemory() && !F.doesNotAccessMemory(),
F.hasFnAttribute(Attribute::NoRecurse), F.returnDoesNotAlias(),
@@ -761,7 +762,8 @@ static void computeVariableSummary(ModuleSummaryIndex &Index,
bool NonRenamableLocal = isNonRenamableLocal(V);
GlobalValueSummary::GVFlags Flags(
V.getLinkage(), V.getVisibility(), NonRenamableLocal,
- /* Live = */ false, V.isDSOLocal(), V.canBeOmittedFromSymbolTable());
+ /* Live = */ false, V.isDSOLocal(), V.canBeOmittedFromSymbolTable(),
+ /* ImportAsDec= */ false);
VTableFuncList VTableFuncs;
// If splitting is not enabled, then we compute the summary information
@@ -807,7 +809,8 @@ static void computeAliasSummary(ModuleSummaryIndex &Index, const GlobalAlias &A,
bool NonRenamableLocal = isNonRenamableLocal(A);
GlobalValueSummary::GVFlags Flags(
A.getLinkage(), A.getVisibility(), NonRenamableLocal,
- /* Live = */ false, A.isDSOLocal(), A.canBeOmittedFromSymbolTable());
+ /* Live = */ false, A.isDSOLocal(), A.canBeOmittedFromSymbolTable(),
+ /* ImportAsDec= */ false);
auto AS = std::make_unique<AliasSummary>(Flags);
auto AliaseeVI = Index.getValueInfo(Aliasee->getGUID());
assert(AliaseeVI && "Alias expects aliasee summary to be available");
@@ -887,7 +890,8 @@ ModuleSummaryIndex llvm::buildModuleSummaryIndex(
GlobalValue::InternalLinkage, GlobalValue::DefaultVisibility,
/* NotEligibleToImport = */ true,
/* Live = */ true,
- /* Local */ GV->isDSOLocal(), GV->canBeOmittedFromSymbolTable());
+ /* Local */ GV->isDSOLocal(), GV->canBeOmittedFromSymbolTable(),
+ /* ImportAsDec= */ false);
CantBePromoted.insert(GV->getGUID());
// Create the appropriate summary type.
if (Function *F = dyn_cast<Function>(GV)) {
diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index fe49e52ae4283c..d437637f468cfd 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -9215,7 +9215,8 @@ bool LLParser::parseFunctionSummary(std::string Name, GlobalValue::GUID GUID,
GlobalValueSummary::GVFlags GVFlags = GlobalValueSummary::GVFlags(
GlobalValue::ExternalLinkage, GlobalValue::DefaultVisibility,
/*NotEligibleToImport=*/false,
- /*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false);
+ /*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false,
+ /*ImportAsDec=*/false);
unsigned InstCount;
std::vector<FunctionSummary::EdgeTy> Calls;
FunctionSummary::TypeIdInfo TypeIdInfo;
@@ -9302,7 +9303,8 @@ bool LLParser::parseVariableSummary(std::string Name, GlobalValue::GUID GUID,
GlobalValueSummary::GVFlags GVFlags = GlobalValueSummary::GVFlags(
GlobalValue::ExternalLinkage, GlobalValue::DefaultVisibility,
/*NotEligibleToImport=*/false,
- /*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false);
+ /*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false,
+ /*ImportAsDec*/ false);
GlobalVarSummary::GVarFlags GVarFlags(/*ReadOnly*/ false,
/* WriteOnly */ false,
/* Constant */ false,
@@ -9360,7 +9362,8 @@ bool LLParser::parseAliasSummary(std::string Name, GlobalValue::GUID GUID,
GlobalValueSummary::GVFlags GVFlags = GlobalValueSummary::GVFlags(
GlobalValue::ExternalLinkage, GlobalValue::DefaultVisibility,
/*NotEligibleToImport=*/false,
- /*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false);
+ /*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false,
+ /*ImportAsDec=*/false);
if (parseToken(lltok::colon, "expected ':' here") ||
parseToken(lltok::lparen, "expected '(' here") ||
parseModuleReference(ModulePath) ||
@@ -10146,6 +10149,12 @@ bool LLParser::parseGVFlags(GlobalValueSummary::GVFlags &GVFlags) {
return true;
GVFlags.CanAutoHide = Flag;
break;
+ case lltok::kw_importAsDec:
+ Lex.Lex();
+ if (parseToken(lltok::colon, "expected ':'") || parseFlag(Flag))
+ return true;
+ GVFlags.ImportAsDec = Flag;
+ break;
default:
return error(Lex.getLoc(), "expected gv flag type");
}
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index aa6c9c95ca2403..408e6f55cdecd2 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -1133,6 +1133,7 @@ static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
// to getDecodedLinkage() will need to be taken into account here as above.
auto Linkage = GlobalValue::LinkageTypes(RawFlags & 0xF); // 4 bits
auto Visibility = GlobalValue::VisibilityTypes((RawFlags >> 8) & 3); // 2 bits
+ bool ImportAsDec = ((RawFlags >> 10) & 1);
RawFlags = RawFlags >> 4;
bool NotEligibleToImport = (RawFlags & 0x1) || Version < 3;
// The Live flag wasn't introduced until version 3. For dead stripping
@@ -1143,7 +1144,7 @@ static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
bool AutoHide = (RawFlags & 0x8);
return GlobalValueSummary::GVFlags(Linkage, Visibility, NotEligibleToImport,
- Live, Local, AutoHide);
+ Live, Local, AutoHide, ImportAsDec);
}
// Decode the flags for GlobalVariable in the summary
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index dd554e422516f6..5007d498e5a220 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -1202,7 +1202,8 @@ static uint64_t getEncodedFFlags(FunctionSummary::FFlags Flags) {
// Decode the flags for GlobalValue in the summary. See getDecodedGVSummaryFlags
// in BitcodeReader.cpp.
-static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags) {
+static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags,
+ bool ImportAsDec = false) {
uint64_t RawFlags = 0;
RawFlags |= Flags.NotEligibleToImport; // bool
@@ -1217,6 +1218,8 @@ static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags) {
RawFlags |= (Flags.Visibility << 8); // 2 bits
+ RawFlags |= ((ImportAsDec) & (1 << 10)); // 1 bit
+
return RawFlags;
}
>From f135a319bb1d763fb509d0468ce42e678c88477f Mon Sep 17 00:00:00 2001
From: mingmingl <mingmingl at google.com>
Date: Thu, 4 Apr 2024 13:02:04 -0700
Subject: [PATCH 2/3] Add AsmWriter and Lexer change
---
llvm/lib/AsmParser/LLLexer.cpp | 1 +
llvm/lib/IR/AsmWriter.cpp | 1 +
llvm/lib/IR/ModuleSummaryIndex.cpp | 2 ++
llvm/test/Assembler/thinlto-summary.ll | 46 +++++++++++++-------------
4 files changed, 27 insertions(+), 23 deletions(-)
diff --git a/llvm/lib/AsmParser/LLLexer.cpp b/llvm/lib/AsmParser/LLLexer.cpp
index 2301a27731eaff..28be5a7a9bc54f 100644
--- a/llvm/lib/AsmParser/LLLexer.cpp
+++ b/llvm/lib/AsmParser/LLLexer.cpp
@@ -737,6 +737,7 @@ lltok::Kind LLLexer::LexIdentifier() {
KEYWORD(live);
KEYWORD(dsoLocal);
KEYWORD(canAutoHide);
+ KEYWORD(importAsDec);
KEYWORD(function);
KEYWORD(insts);
KEYWORD(funcFlags);
diff --git a/llvm/lib/IR/AsmWriter.cpp b/llvm/lib/IR/AsmWriter.cpp
index b778a14158ef2b..11dbd8a6484bb4 100644
--- a/llvm/lib/IR/AsmWriter.cpp
+++ b/llvm/lib/IR/AsmWriter.cpp
@@ -3545,6 +3545,7 @@ void AssemblyWriter::printSummary(const GlobalValueSummary &Summary) {
Out << ", live: " << GVFlags.Live;
Out << ", dsoLocal: " << GVFlags.DSOLocal;
Out << ", canAutoHide: " << GVFlags.CanAutoHide;
+ Out << ", importAsDec: " << GVFlags.ImportAsDec;
Out << ")";
if (Summary.getSummaryKind() == GlobalValueSummary::AliasKind)
diff --git a/llvm/lib/IR/ModuleSummaryIndex.cpp b/llvm/lib/IR/ModuleSummaryIndex.cpp
index 198c730418c724..b09ab668d49763 100644
--- a/llvm/lib/IR/ModuleSummaryIndex.cpp
+++ b/llvm/lib/IR/ModuleSummaryIndex.cpp
@@ -644,6 +644,8 @@ void ModuleSummaryIndex::exportToDot(
A.addComment("dsoLocal");
if (Flags.CanAutoHide)
A.addComment("canAutoHide");
+ if (Flags.ImportAsDec)
+ A.addComment("importAsDec");
if (GUIDPreservedSymbols.count(SummaryIt.first))
A.addComment("preserved");
diff --git a/llvm/test/Assembler/thinlto-summary.ll b/llvm/test/Assembler/thinlto-summary.ll
index 9eb3c6669780d6..d7a1abe58789f8 100644
--- a/llvm/test/Assembler/thinlto-summary.ll
+++ b/llvm/test/Assembler/thinlto-summary.ll
@@ -22,7 +22,7 @@
^6 = gv: (guid: 5, summaries: (function: (module: ^0, flags: (linkage: available_externally, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 1)))
^7 = gv: (guid: 6, summaries: (function: (module: ^0, flags: (linkage: linkonce, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 1)))
^8 = gv: (guid: 7, summaries: (function: (module: ^0, flags: (linkage: linkonce_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 1)))
-^9 = gv: (guid: 8, summaries: (function: (module: ^0, flags: (linkage: weak_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 1), insts: 1)))
+^9 = gv: (guid: 8, summaries: (function: (module: ^0, flags: (linkage: weak_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 1, importAsDec: 0), insts: 1)))
^10 = gv: (guid: 9, summaries: (function: (module: ^0, flags: (linkage: weak, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 1)))
^11 = gv: (guid: 10, summaries: (variable: (module: ^0, flags: (linkage: common, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), varFlags: (readonly: 0))))
; Test appending globel variable with reference (tests backward reference on
@@ -69,30 +69,30 @@
; Make sure we get back from llvm-dis essentially what we put in via llvm-as.
; CHECK: ^0 = module: (path: "thinlto-summary1.o", hash: (1369602428, 2747878711, 259090915, 2507395659, 1141468049))
; CHECK: ^1 = module: (path: "thinlto-summary2.o", hash: (2998369023, 4283347029, 1195487472, 2757298015, 1852134156))
-; CHECK: ^2 = gv: (guid: 1, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 10, calls: ((callee: ^15, hotness: hot), (callee: ^17, hotness: cold), (callee: ^16, hotness: none, tail: 1)), refs: (^11, readonly ^13, writeonly ^14))))
+; CHECK: ^2 = gv: (guid: 1, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 10, calls: ((callee: ^15, hotness: hot), (callee: ^17, hotness: cold), (callee: ^16, hotness: none, tail: 1)), refs: (^11, readonly ^13, writeonly ^14))))
;; relbf is not emitted since this is a combined summary, and that is only
;; emitted for per-module summaries.
-; CHECK: ^3 = gv: (guid: 2, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 10, calls: ((callee: ^15, tail: 1)))))
-; CHECK: ^4 = gv: (guid: 3, summaries: (function: (module: ^0, flags: (linkage: internal, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0), insts: 1)))
-; CHECK: ^5 = gv: (guid: 4, summaries: (alias: (module: ^0, flags: (linkage: private, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0), aliasee: ^14)))
-; CHECK: ^6 = gv: (guid: 5, summaries: (function: (module: ^0, flags: (linkage: available_externally, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 1)))
-; CHECK: ^7 = gv: (guid: 6, summaries: (function: (module: ^0, flags: (linkage: linkonce, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 1)))
-; CHECK: ^8 = gv: (guid: 7, summaries: (function: (module: ^0, flags: (linkage: linkonce_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 1)))
-; CHECK: ^9 = gv: (guid: 8, summaries: (function: (module: ^0, flags: (linkage: weak_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 1), insts: 1)))
-; CHECK: ^10 = gv: (guid: 9, summaries: (function: (module: ^0, flags: (linkage: weak, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 1)))
-; CHECK: ^11 = gv: (guid: 10, summaries: (variable: (module: ^0, flags: (linkage: common, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0))))
-; CHECK: ^12 = gv: (guid: 11, summaries: (variable: (module: ^0, flags: (linkage: appending, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0), refs: (^4))))
-; CHECK: ^13 = gv: (guid: 12, summaries: (variable: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), varFlags: (readonly: 1, writeonly: 0, constant: 0))))
-; CHECK: ^14 = gv: (guid: 13, summaries: (variable: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0))))
-; CHECK: ^15 = gv: (guid: 14, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 1, live: 1, dsoLocal: 0, canAutoHide: 0), insts: 1, funcFlags: (readNone: 0, readOnly: 0, noRecurse: 0, returnDoesNotAlias: 0, noInline: 1, alwaysInline: 0, noUnwind: 0, mayThrow: 0, hasUnknownCall: 0, mustBeUnreachable: 0))))
-; CHECK: ^16 = gv: (guid: 15, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 1, funcFlags: (readNone: 1, readOnly: 0, noRecurse: 1, returnDoesNotAlias: 0, noInline: 0, alwaysInline: 1, noUnwind: 1, mayThrow: 1, hasUnknownCall: 1, mustBeUnreachable: 0))))
-; CHECK: ^17 = gv: (guid: 16, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 1, funcFlags: (readNone: 0, readOnly: 1, noRecurse: 0, returnDoesNotAlias: 1, noInline: 0, alwaysInline: 0, noUnwind: 0, mayThrow: 0, hasUnknownCall: 0, mustBeUnreachable: 1), calls: ((callee: ^15)))))
-; CHECK: ^18 = gv: (guid: 17, summaries: (alias: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0), aliasee: ^14)))
-; CHECK: ^19 = gv: (guid: 18, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 4, typeIdInfo: (typeTests: (^24, ^26)))))
-; CHECK: ^20 = gv: (guid: 19, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 8, typeIdInfo: (typeTestAssumeVCalls: (vFuncId: (^27, offset: 16))))))
-; CHECK: ^21 = gv: (guid: 20, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 5, typeIdInfo: (typeCheckedLoadVCalls: (vFuncId: (^25, offset: 16))))))
-; CHECK: ^22 = gv: (guid: 21, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 15, typeIdInfo: (typeTestAssumeConstVCalls: ((vFuncId: (^27, offset: 16), args: (42)), (vFuncId: (^27, offset: 24)))))))
-; CHECK: ^23 = gv: (guid: 22, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0), insts: 5, typeIdInfo: (typeCheckedLoadConstVCalls: ((vFuncId: (^28, offset: 16), args: (42)))))))
+; CHECK: ^3 = gv: (guid: 2, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 10, calls: ((callee: ^15, tail: 1)))))
+; CHECK: ^4 = gv: (guid: 3, summaries: (function: (module: ^0, flags: (linkage: internal, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importAsDec: 0), insts: 1)))
+; CHECK: ^5 = gv: (guid: 4, summaries: (alias: (module: ^0, flags: (linkage: private, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importAsDec: 0), aliasee: ^14)))
+; CHECK: ^6 = gv: (guid: 5, summaries: (function: (module: ^0, flags: (linkage: available_externally, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1)))
+; CHECK: ^7 = gv: (guid: 6, summaries: (function: (module: ^0, flags: (linkage: linkonce, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1)))
+; CHECK: ^8 = gv: (guid: 7, summaries: (function: (module: ^0, flags: (linkage: linkonce_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1)))
+; CHECK: ^9 = gv: (guid: 8, summaries: (function: (module: ^0, flags: (linkage: weak_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 1, importAsDec: 0), insts: 1)))
+; CHECK: ^10 = gv: (guid: 9, summaries: (function: (module: ^0, flags: (linkage: weak, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1)))
+; CHECK: ^11 = gv: (guid: 10, summaries: (variable: (module: ^0, flags: (linkage: common, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0))))
+; CHECK: ^12 = gv: (guid: 11, summaries: (variable: (module: ^0, flags: (linkage: appending, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0), refs: (^4))))
+; CHECK: ^13 = gv: (guid: 12, summaries: (variable: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), varFlags: (readonly: 1, writeonly: 0, constant: 0))))
+; CHECK: ^14 = gv: (guid: 13, summaries: (variable: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importAsDec: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0))))
+; CHECK: ^15 = gv: (guid: 14, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 1, live: 1, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1, funcFlags: (readNone: 0, readOnly: 0, noRecurse: 0, returnDoesNotAlias: 0, noInline: 1, alwaysInline: 0, noUnwind: 0, mayThrow: 0, hasUnknownCall: 0, mustBeUnreachable: 0))))
+; CHECK: ^16 = gv: (guid: 15, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1, funcFlags: (readNone: 1, readOnly: 0, noRecurse: 1, returnDoesNotAlias: 0, noInline: 0, alwaysInline: 1, noUnwind: 1, mayThrow: 1, hasUnknownCall: 1, mustBeUnreachable: 0))))
+; CHECK: ^17 = gv: (guid: 16, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1, funcFlags: (readNone: 0, readOnly: 1, noRecurse: 0, returnDoesNotAlias: 1, noInline: 0, alwaysInline: 0, noUnwind: 0, mayThrow: 0, hasUnknownCall: 0, mustBeUnreachable: 1), calls: ((callee: ^15)))))
+; CHECK: ^18 = gv: (guid: 17, summaries: (alias: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importAsDec: 0), aliasee: ^14)))
+; CHECK: ^19 = gv: (guid: 18, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 4, typeIdInfo: (typeTests: (^24, ^26)))))
+; CHECK: ^20 = gv: (guid: 19, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 8, typeIdInfo: (typeTestAssumeVCalls: (vFuncId: (^27, offset: 16))))))
+; CHECK: ^21 = gv: (guid: 20, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 5, typeIdInfo: (typeCheckedLoadVCalls: (vFuncId: (^25, offset: 16))))))
+; CHECK: ^22 = gv: (guid: 21, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 15, typeIdInfo: (typeTestAssumeConstVCalls: ((vFuncId: (^27, offset: 16), args: (42)), (vFuncId: (^27, offset: 24)))))))
+; CHECK: ^23 = gv: (guid: 22, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 5, typeIdInfo: (typeCheckedLoadConstVCalls: ((vFuncId: (^28, offset: 16), args: (42)))))))
; CHECK: ^24 = typeid: (name: "_ZTS1C", summary: (typeTestRes: (kind: single, sizeM1BitWidth: 0))) ; guid = 1884921850105019584
; CHECK: ^25 = typeid: (name: "_ZTS1B", summary: (typeTestRes: (kind: inline, sizeM1BitWidth: 0, alignLog2: 1, sizeM1: 2, bitMask: 3, inlineBits: 4))) ; guid = 6203814149063363976
; CHECK: ^26 = typeid: (name: "_ZTS1A", summary: (typeTestRes: (kind: allOnes, sizeM1BitWidth: 7), wpdResolutions: ((offset: 0, wpdRes: (kind: branchFunnel)), (offset: 8, wpdRes: (kind: singleImpl, singleImplName: "_ZN1A1nEi")), (offset: 16, wpdRes: (kind: indir, resByArg: (args: (1, 2), byArg: (kind: indir, byte: 2, bit: 3), args: (3), byArg: (kind: uniformRetVal, info: 1), args: (4), byArg: (kind: uniqueRetVal, info: 1), args: (5), byArg: (kind: virtualConstProp))))))) ; guid = 7004155349499253778
>From e41f66b4953f8f93e999a474311d912849e0cae2 Mon Sep 17 00:00:00 2001
From: mingmingl <mingmingl at google.com>
Date: Mon, 8 Apr 2024 22:48:19 -0700
Subject: [PATCH 3/3] Use 2-bit state as discussed
---
llvm/include/llvm/AsmParser/LLToken.h | 4 +-
llvm/include/llvm/IR/ModuleSummaryIndex.h | 30 ++++++++---
llvm/include/llvm/IR/ModuleSummaryIndexYAML.h | 11 ++--
llvm/lib/Analysis/ModuleSummaryAnalysis.cpp | 8 +--
llvm/lib/AsmParser/LLLexer.cpp | 4 +-
llvm/lib/AsmParser/LLParser.cpp | 30 ++++++++---
llvm/lib/Bitcode/Reader/BitcodeReader.cpp | 6 ++-
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 5 +-
llvm/lib/IR/AsmWriter.cpp | 14 +++++-
llvm/lib/IR/ModuleSummaryIndex.cpp | 6 ++-
llvm/test/Assembler/thinlto-summary.ll | 50 +++++++++----------
11 files changed, 110 insertions(+), 58 deletions(-)
diff --git a/llvm/include/llvm/AsmParser/LLToken.h b/llvm/include/llvm/AsmParser/LLToken.h
index 21229683f2496b..0cbcdcd9ffac77 100644
--- a/llvm/include/llvm/AsmParser/LLToken.h
+++ b/llvm/include/llvm/AsmParser/LLToken.h
@@ -370,7 +370,9 @@ enum Kind {
kw_live,
kw_dsoLocal,
kw_canAutoHide,
- kw_importAsDec,
+ kw_importType,
+ kw_definition,
+ kw_declaration,
kw_function,
kw_insts,
kw_funcFlags,
diff --git a/llvm/include/llvm/IR/ModuleSummaryIndex.h b/llvm/include/llvm/IR/ModuleSummaryIndex.h
index 7eba77540fa7ea..e0a81ed16c5d0e 100644
--- a/llvm/include/llvm/IR/ModuleSummaryIndex.h
+++ b/llvm/include/llvm/IR/ModuleSummaryIndex.h
@@ -432,6 +432,16 @@ class GlobalValueSummary {
/// Sububclass discriminator (for dyn_cast<> et al.)
enum SummaryKind : unsigned { AliasKind, FunctionKind, GlobalVarKind };
+ enum ImportKind : unsigned {
+ // The global value definition corresponding to the summary should be
+ // imported from source module
+ Definition = 0,
+ // The global value declaration corresponding to the summary should be
+ // imported when its definition doesn't exist in the destination module
+ // and not imported (e.g., function is large to be inlined).
+ Declaration = 1,
+ };
+
/// Group flags (Linkage, NotEligibleToImport, etc.) as a bitfield.
struct GVFlags {
/// The linkage type of the associated global value.
@@ -472,20 +482,19 @@ class GlobalValueSummary {
/// means the symbol was externally visible.
unsigned CanAutoHide : 1;
- /// This field is written by the ThinLTO indexing step to postlink
- /// per-module summary. It indicates whether a global value (function or
- /// function alias, etc) should be imported as a definition or declaration.
- unsigned ImportAsDec : 1;
+ /// This field is written by the ThinLTO indexing step to postlink combined
+ /// summary. The value is interpreted as 'ImportKind' enum defined above.
+ unsigned ImportType : 2;
/// Convenience Constructors
explicit GVFlags(GlobalValue::LinkageTypes Linkage,
GlobalValue::VisibilityTypes Visibility,
bool NotEligibleToImport, bool Live, bool IsLocal,
- bool CanAutoHide, bool ImportAsDec)
+ bool CanAutoHide, ImportKind ImportType)
: Linkage(Linkage), Visibility(Visibility),
NotEligibleToImport(NotEligibleToImport), Live(Live),
DSOLocal(IsLocal), CanAutoHide(CanAutoHide),
- ImportAsDec(ImportAsDec) {}
+ ImportType(static_cast<unsigned>(ImportType)) {}
};
private:
@@ -570,7 +579,11 @@ class GlobalValueSummary {
bool canAutoHide() const { return Flags.CanAutoHide; }
- bool shouldImportAsDec() const { return Flags.ImportAsDec; }
+ bool shouldImportAsDec() const {
+ return Flags.ImportType == GlobalValueSummary::ImportKind::Declaration;
+ }
+
+ void setImportKind(ImportKind IK) { Flags.ImportType = IK; }
GlobalValue::VisibilityTypes getVisibility() const {
return (GlobalValue::VisibilityTypes)Flags.Visibility;
@@ -821,7 +834,8 @@ class FunctionSummary : public GlobalValueSummary {
GlobalValue::LinkageTypes::AvailableExternallyLinkage,
GlobalValue::DefaultVisibility,
/*NotEligibleToImport=*/true, /*Live=*/true, /*IsLocal=*/false,
- /*CanAutoHide=*/false, /*ImportAsDec=*/false),
+ /*CanAutoHide=*/false,
+ /*ImportKind=*/GlobalValueSummary::ImportKind::Definition),
/*NumInsts=*/0, FunctionSummary::FFlags{}, /*EntryCount=*/0,
std::vector<ValueInfo>(), std::move(Edges),
std::vector<GlobalValue::GUID>(),
diff --git a/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h b/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
index 21dddcf0c03dcd..026f8c7445305d 100644
--- a/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
+++ b/llvm/include/llvm/IR/ModuleSummaryIndexYAML.h
@@ -137,7 +137,8 @@ template <> struct MappingTraits<TypeIdSummary> {
struct FunctionSummaryYaml {
unsigned Linkage, Visibility;
- bool NotEligibleToImport, Live, IsLocal, CanAutoHide, ImportAsDec;
+ bool NotEligibleToImport, Live, IsLocal, CanAutoHide;
+ unsigned ImportKind;
std::vector<uint64_t> Refs;
std::vector<uint64_t> TypeTests;
std::vector<FunctionSummary::VFuncId> TypeTestAssumeVCalls,
@@ -227,7 +228,8 @@ template <> struct CustomMappingTraits<GlobalValueSummaryMapTy> {
static_cast<GlobalValue::LinkageTypes>(FSum.Linkage),
static_cast<GlobalValue::VisibilityTypes>(FSum.Visibility),
FSum.NotEligibleToImport, FSum.Live, FSum.IsLocal,
- FSum.CanAutoHide, FSum.ImportAsDec),
+ FSum.CanAutoHide,
+ static_cast<GlobalValueSummary::ImportKind>(FSum.ImportKind)),
/*NumInsts=*/0, FunctionSummary::FFlags{}, /*EntryCount=*/0, Refs,
ArrayRef<FunctionSummary::EdgeTy>{}, std::move(FSum.TypeTests),
std::move(FSum.TypeTestAssumeVCalls),
@@ -252,9 +254,8 @@ template <> struct CustomMappingTraits<GlobalValueSummaryMapTy> {
static_cast<bool>(FSum->flags().Live),
static_cast<bool>(FSum->flags().DSOLocal),
static_cast<bool>(FSum->flags().CanAutoHide),
- static_cast<bool>(FSum->flags().ImportAsDec), Refs,
- FSum->type_tests(), FSum->type_test_assume_vcalls(),
- FSum->type_checked_load_vcalls(),
+ FSum->flags().ImportType, Refs, FSum->type_tests(),
+ FSum->type_test_assume_vcalls(), FSum->type_checked_load_vcalls(),
FSum->type_test_assume_const_vcalls(),
FSum->type_checked_load_const_vcalls()});
}
diff --git a/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp b/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
index eb81de81e476dd..5c103264b129aa 100644
--- a/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
+++ b/llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
@@ -636,7 +636,7 @@ static void computeFunctionSummary(
GlobalValueSummary::GVFlags Flags(
F.getLinkage(), F.getVisibility(), NotEligibleForImport,
/* Live = */ false, F.isDSOLocal(), F.canBeOmittedFromSymbolTable(),
- /*ImportAsDec=*/false);
+ /*ImportType=*/GlobalValueSummary::ImportKind::Definition);
FunctionSummary::FFlags FunFlags{
F.doesNotAccessMemory(), F.onlyReadsMemory() && !F.doesNotAccessMemory(),
F.hasFnAttribute(Attribute::NoRecurse), F.returnDoesNotAlias(),
@@ -763,7 +763,7 @@ static void computeVariableSummary(ModuleSummaryIndex &Index,
GlobalValueSummary::GVFlags Flags(
V.getLinkage(), V.getVisibility(), NonRenamableLocal,
/* Live = */ false, V.isDSOLocal(), V.canBeOmittedFromSymbolTable(),
- /* ImportAsDec= */ false);
+ GlobalValueSummary::Definition);
VTableFuncList VTableFuncs;
// If splitting is not enabled, then we compute the summary information
@@ -810,7 +810,7 @@ static void computeAliasSummary(ModuleSummaryIndex &Index, const GlobalAlias &A,
GlobalValueSummary::GVFlags Flags(
A.getLinkage(), A.getVisibility(), NonRenamableLocal,
/* Live = */ false, A.isDSOLocal(), A.canBeOmittedFromSymbolTable(),
- /* ImportAsDec= */ false);
+ GlobalValueSummary::Definition);
auto AS = std::make_unique<AliasSummary>(Flags);
auto AliaseeVI = Index.getValueInfo(Aliasee->getGUID());
assert(AliaseeVI && "Alias expects aliasee summary to be available");
@@ -891,7 +891,7 @@ ModuleSummaryIndex llvm::buildModuleSummaryIndex(
/* NotEligibleToImport = */ true,
/* Live = */ true,
/* Local */ GV->isDSOLocal(), GV->canBeOmittedFromSymbolTable(),
- /* ImportAsDec= */ false);
+ GlobalValueSummary::Definition);
CantBePromoted.insert(GV->getGUID());
// Create the appropriate summary type.
if (Function *F = dyn_cast<Function>(GV)) {
diff --git a/llvm/lib/AsmParser/LLLexer.cpp b/llvm/lib/AsmParser/LLLexer.cpp
index 28be5a7a9bc54f..8ded07ffd8bd25 100644
--- a/llvm/lib/AsmParser/LLLexer.cpp
+++ b/llvm/lib/AsmParser/LLLexer.cpp
@@ -737,7 +737,9 @@ lltok::Kind LLLexer::LexIdentifier() {
KEYWORD(live);
KEYWORD(dsoLocal);
KEYWORD(canAutoHide);
- KEYWORD(importAsDec);
+ KEYWORD(importType);
+ KEYWORD(definition);
+ KEYWORD(declaration);
KEYWORD(function);
KEYWORD(insts);
KEYWORD(funcFlags);
diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index d437637f468cfd..9e4450aacb1eb8 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -2072,6 +2072,23 @@ void LLParser::parseOptionalVisibility(unsigned &Res) {
Lex.Lex();
}
+static GlobalValueSummary::ImportKind
+parseOptionalImportType(lltok::Kind Kind) {
+ GlobalValueSummary::ImportKind Res;
+ switch (Kind) {
+ default:
+ Res = GlobalValueSummary::Definition;
+ break;
+ case lltok::kw_definition:
+ Res = GlobalValueSummary::Definition;
+ break;
+ case lltok::kw_declaration:
+ Res = GlobalValueSummary::Declaration;
+ break;
+ }
+ return Res;
+}
+
/// parseOptionalDLLStorageClass
/// ::= /*empty*/
/// ::= 'dllimport'
@@ -9216,7 +9233,7 @@ bool LLParser::parseFunctionSummary(std::string Name, GlobalValue::GUID GUID,
GlobalValue::ExternalLinkage, GlobalValue::DefaultVisibility,
/*NotEligibleToImport=*/false,
/*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false,
- /*ImportAsDec=*/false);
+ GlobalValueSummary::Definition);
unsigned InstCount;
std::vector<FunctionSummary::EdgeTy> Calls;
FunctionSummary::TypeIdInfo TypeIdInfo;
@@ -9304,7 +9321,7 @@ bool LLParser::parseVariableSummary(std::string Name, GlobalValue::GUID GUID,
GlobalValue::ExternalLinkage, GlobalValue::DefaultVisibility,
/*NotEligibleToImport=*/false,
/*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false,
- /*ImportAsDec*/ false);
+ GlobalValueSummary::Definition);
GlobalVarSummary::GVarFlags GVarFlags(/*ReadOnly*/ false,
/* WriteOnly */ false,
/* Constant */ false,
@@ -9363,7 +9380,7 @@ bool LLParser::parseAliasSummary(std::string Name, GlobalValue::GUID GUID,
GlobalValue::ExternalLinkage, GlobalValue::DefaultVisibility,
/*NotEligibleToImport=*/false,
/*Live=*/false, /*IsLocal=*/false, /*CanAutoHide=*/false,
- /*ImportAsDec=*/false);
+ GlobalValueSummary::Definition);
if (parseToken(lltok::colon, "expected ':' here") ||
parseToken(lltok::lparen, "expected '(' here") ||
parseModuleReference(ModulePath) ||
@@ -10149,11 +10166,12 @@ bool LLParser::parseGVFlags(GlobalValueSummary::GVFlags &GVFlags) {
return true;
GVFlags.CanAutoHide = Flag;
break;
- case lltok::kw_importAsDec:
+ case lltok::kw_importType:
Lex.Lex();
- if (parseToken(lltok::colon, "expected ':'") || parseFlag(Flag))
+ if (parseToken(lltok::colon, "expected ':'"))
return true;
- GVFlags.ImportAsDec = Flag;
+ GVFlags.ImportType = parseOptionalImportType(Lex.getKind());
+ Lex.Lex();
break;
default:
return error(Lex.getLoc(), "expected gv flag type");
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index 408e6f55cdecd2..dba2f0a35965d8 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -1133,7 +1133,9 @@ static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
// to getDecodedLinkage() will need to be taken into account here as above.
auto Linkage = GlobalValue::LinkageTypes(RawFlags & 0xF); // 4 bits
auto Visibility = GlobalValue::VisibilityTypes((RawFlags >> 8) & 3); // 2 bits
- bool ImportAsDec = ((RawFlags >> 10) & 1);
+ GlobalValueSummary::ImportKind IK =
+ static_cast<GlobalValueSummary::ImportKind>(
+ ((RawFlags >> 10) & 3)); // 2 bits
RawFlags = RawFlags >> 4;
bool NotEligibleToImport = (RawFlags & 0x1) || Version < 3;
// The Live flag wasn't introduced until version 3. For dead stripping
@@ -1144,7 +1146,7 @@ static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
bool AutoHide = (RawFlags & 0x8);
return GlobalValueSummary::GVFlags(Linkage, Visibility, NotEligibleToImport,
- Live, Local, AutoHide, ImportAsDec);
+ Live, Local, AutoHide, IK);
}
// Decode the flags for GlobalVariable in the summary
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index 5007d498e5a220..730985d8613bde 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -1202,8 +1202,7 @@ static uint64_t getEncodedFFlags(FunctionSummary::FFlags Flags) {
// Decode the flags for GlobalValue in the summary. See getDecodedGVSummaryFlags
// in BitcodeReader.cpp.
-static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags,
- bool ImportAsDec = false) {
+static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags) {
uint64_t RawFlags = 0;
RawFlags |= Flags.NotEligibleToImport; // bool
@@ -1218,7 +1217,7 @@ static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags,
RawFlags |= (Flags.Visibility << 8); // 2 bits
- RawFlags |= ((ImportAsDec) & (1 << 10)); // 1 bit
+ RawFlags |= (Flags.ImportType << 10); // 2 bits
return RawFlags;
}
diff --git a/llvm/lib/IR/AsmWriter.cpp b/llvm/lib/IR/AsmWriter.cpp
index 11dbd8a6484bb4..586b0ee2784a84 100644
--- a/llvm/lib/IR/AsmWriter.cpp
+++ b/llvm/lib/IR/AsmWriter.cpp
@@ -3306,6 +3306,16 @@ static const char *getVisibilityName(GlobalValue::VisibilityTypes Vis) {
llvm_unreachable("invalid visibility");
}
+static const char *getImportTypeName(GlobalValueSummary::ImportKind IK) {
+ switch (IK) {
+ case GlobalValueSummary::Definition:
+ return "definition";
+ case GlobalValueSummary::Declaration:
+ return "declaration";
+ }
+ assert(false && "invalid import kind");
+}
+
void AssemblyWriter::printFunctionSummary(const FunctionSummary *FS) {
Out << ", insts: " << FS->instCount();
if (FS->fflags().anyFlagSet())
@@ -3545,7 +3555,9 @@ void AssemblyWriter::printSummary(const GlobalValueSummary &Summary) {
Out << ", live: " << GVFlags.Live;
Out << ", dsoLocal: " << GVFlags.DSOLocal;
Out << ", canAutoHide: " << GVFlags.CanAutoHide;
- Out << ", importAsDec: " << GVFlags.ImportAsDec;
+ Out << ", importType: "
+ << getImportTypeName(
+ static_cast<GlobalValueSummary::ImportKind>(GVFlags.ImportType));
Out << ")";
if (Summary.getSummaryKind() == GlobalValueSummary::AliasKind)
diff --git a/llvm/lib/IR/ModuleSummaryIndex.cpp b/llvm/lib/IR/ModuleSummaryIndex.cpp
index b09ab668d49763..6713d32fb787ce 100644
--- a/llvm/lib/IR/ModuleSummaryIndex.cpp
+++ b/llvm/lib/IR/ModuleSummaryIndex.cpp
@@ -644,8 +644,10 @@ void ModuleSummaryIndex::exportToDot(
A.addComment("dsoLocal");
if (Flags.CanAutoHide)
A.addComment("canAutoHide");
- if (Flags.ImportAsDec)
- A.addComment("importAsDec");
+ if (Flags.ImportType == GlobalValueSummary::ImportKind::Definition)
+ A.addComment("definition");
+ else if (Flags.ImportType == GlobalValueSummary::ImportKind::Declaration)
+ A.addComment("declaration");
if (GUIDPreservedSymbols.count(SummaryIt.first))
A.addComment("preserved");
diff --git a/llvm/test/Assembler/thinlto-summary.ll b/llvm/test/Assembler/thinlto-summary.ll
index d7a1abe58789f8..285dcacc9fb6a9 100644
--- a/llvm/test/Assembler/thinlto-summary.ll
+++ b/llvm/test/Assembler/thinlto-summary.ll
@@ -16,13 +16,13 @@
^3 = gv: (guid: 2, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 10, calls: ((callee: ^15, relbf: 256, tail: 1)))))
; Summaries with different linkage types.
-^4 = gv: (guid: 3, summaries: (function: (module: ^0, flags: (linkage: internal, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1), insts: 1)))
+^4 = gv: (guid: 3, summaries: (function: (module: ^0, flags: (linkage: internal, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, importType: definition), insts: 1)))
; Make this one an alias with a forward reference to aliasee.
-^5 = gv: (guid: 4, summaries: (alias: (module: ^0, flags: (linkage: private, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1), aliasee: ^14)))
+^5 = gv: (guid: 4, summaries: (alias: (module: ^0, flags: (linkage: private, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, importType: definition), aliasee: ^14)))
^6 = gv: (guid: 5, summaries: (function: (module: ^0, flags: (linkage: available_externally, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 1)))
^7 = gv: (guid: 6, summaries: (function: (module: ^0, flags: (linkage: linkonce, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 1)))
^8 = gv: (guid: 7, summaries: (function: (module: ^0, flags: (linkage: linkonce_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 1)))
-^9 = gv: (guid: 8, summaries: (function: (module: ^0, flags: (linkage: weak_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 1, importAsDec: 0), insts: 1)))
+^9 = gv: (guid: 8, summaries: (function: (module: ^0, flags: (linkage: weak_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: declaration), insts: 1)))
^10 = gv: (guid: 9, summaries: (function: (module: ^0, flags: (linkage: weak, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), insts: 1)))
^11 = gv: (guid: 10, summaries: (variable: (module: ^0, flags: (linkage: common, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0), varFlags: (readonly: 0))))
; Test appending globel variable with reference (tests backward reference on
@@ -69,30 +69,30 @@
; Make sure we get back from llvm-dis essentially what we put in via llvm-as.
; CHECK: ^0 = module: (path: "thinlto-summary1.o", hash: (1369602428, 2747878711, 259090915, 2507395659, 1141468049))
; CHECK: ^1 = module: (path: "thinlto-summary2.o", hash: (2998369023, 4283347029, 1195487472, 2757298015, 1852134156))
-; CHECK: ^2 = gv: (guid: 1, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 10, calls: ((callee: ^15, hotness: hot), (callee: ^17, hotness: cold), (callee: ^16, hotness: none, tail: 1)), refs: (^11, readonly ^13, writeonly ^14))))
+; CHECK: ^2 = gv: (guid: 1, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 10, calls: ((callee: ^15, hotness: hot), (callee: ^17, hotness: cold), (callee: ^16, hotness: none, tail: 1)), refs: (^11, readonly ^13, writeonly ^14))))
;; relbf is not emitted since this is a combined summary, and that is only
;; emitted for per-module summaries.
-; CHECK: ^3 = gv: (guid: 2, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 10, calls: ((callee: ^15, tail: 1)))))
-; CHECK: ^4 = gv: (guid: 3, summaries: (function: (module: ^0, flags: (linkage: internal, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importAsDec: 0), insts: 1)))
-; CHECK: ^5 = gv: (guid: 4, summaries: (alias: (module: ^0, flags: (linkage: private, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importAsDec: 0), aliasee: ^14)))
-; CHECK: ^6 = gv: (guid: 5, summaries: (function: (module: ^0, flags: (linkage: available_externally, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1)))
-; CHECK: ^7 = gv: (guid: 6, summaries: (function: (module: ^0, flags: (linkage: linkonce, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1)))
-; CHECK: ^8 = gv: (guid: 7, summaries: (function: (module: ^0, flags: (linkage: linkonce_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1)))
-; CHECK: ^9 = gv: (guid: 8, summaries: (function: (module: ^0, flags: (linkage: weak_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 1, importAsDec: 0), insts: 1)))
-; CHECK: ^10 = gv: (guid: 9, summaries: (function: (module: ^0, flags: (linkage: weak, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1)))
-; CHECK: ^11 = gv: (guid: 10, summaries: (variable: (module: ^0, flags: (linkage: common, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0))))
-; CHECK: ^12 = gv: (guid: 11, summaries: (variable: (module: ^0, flags: (linkage: appending, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0), refs: (^4))))
-; CHECK: ^13 = gv: (guid: 12, summaries: (variable: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), varFlags: (readonly: 1, writeonly: 0, constant: 0))))
-; CHECK: ^14 = gv: (guid: 13, summaries: (variable: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importAsDec: 0), varFlags: (readonly: 0, writeonly: 0, constant: 0))))
-; CHECK: ^15 = gv: (guid: 14, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 1, live: 1, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1, funcFlags: (readNone: 0, readOnly: 0, noRecurse: 0, returnDoesNotAlias: 0, noInline: 1, alwaysInline: 0, noUnwind: 0, mayThrow: 0, hasUnknownCall: 0, mustBeUnreachable: 0))))
-; CHECK: ^16 = gv: (guid: 15, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1, funcFlags: (readNone: 1, readOnly: 0, noRecurse: 1, returnDoesNotAlias: 0, noInline: 0, alwaysInline: 1, noUnwind: 1, mayThrow: 1, hasUnknownCall: 1, mustBeUnreachable: 0))))
-; CHECK: ^17 = gv: (guid: 16, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 1, funcFlags: (readNone: 0, readOnly: 1, noRecurse: 0, returnDoesNotAlias: 1, noInline: 0, alwaysInline: 0, noUnwind: 0, mayThrow: 0, hasUnknownCall: 0, mustBeUnreachable: 1), calls: ((callee: ^15)))))
-; CHECK: ^18 = gv: (guid: 17, summaries: (alias: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importAsDec: 0), aliasee: ^14)))
-; CHECK: ^19 = gv: (guid: 18, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 4, typeIdInfo: (typeTests: (^24, ^26)))))
-; CHECK: ^20 = gv: (guid: 19, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 8, typeIdInfo: (typeTestAssumeVCalls: (vFuncId: (^27, offset: 16))))))
-; CHECK: ^21 = gv: (guid: 20, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 5, typeIdInfo: (typeCheckedLoadVCalls: (vFuncId: (^25, offset: 16))))))
-; CHECK: ^22 = gv: (guid: 21, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 15, typeIdInfo: (typeTestAssumeConstVCalls: ((vFuncId: (^27, offset: 16), args: (42)), (vFuncId: (^27, offset: 24)))))))
-; CHECK: ^23 = gv: (guid: 22, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importAsDec: 0), insts: 5, typeIdInfo: (typeCheckedLoadConstVCalls: ((vFuncId: (^28, offset: 16), args: (42)))))))
+; CHECK: ^3 = gv: (guid: 2, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 10, calls: ((callee: ^15, tail: 1)))))
+; CHECK: ^4 = gv: (guid: 3, summaries: (function: (module: ^0, flags: (linkage: internal, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importType: definition), insts: 1)))
+; CHECK: ^5 = gv: (guid: 4, summaries: (alias: (module: ^0, flags: (linkage: private, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importType: definition), aliasee: ^14)))
+; CHECK: ^6 = gv: (guid: 5, summaries: (function: (module: ^0, flags: (linkage: available_externally, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 1)))
+; CHECK: ^7 = gv: (guid: 6, summaries: (function: (module: ^0, flags: (linkage: linkonce, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 1)))
+; CHECK: ^8 = gv: (guid: 7, summaries: (function: (module: ^0, flags: (linkage: linkonce_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 1)))
+; CHECK: ^9 = gv: (guid: 8, summaries: (function: (module: ^0, flags: (linkage: weak_odr, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: declaration), insts: 1)))
+; CHECK: ^10 = gv: (guid: 9, summaries: (function: (module: ^0, flags: (linkage: weak, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 1)))
+; CHECK: ^11 = gv: (guid: 10, summaries: (variable: (module: ^0, flags: (linkage: common, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), varFlags: (readonly: 0, writeonly: 0, constant: 0))))
+; CHECK: ^12 = gv: (guid: 11, summaries: (variable: (module: ^0, flags: (linkage: appending, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), varFlags: (readonly: 0, writeonly: 0, constant: 0), refs: (^4))))
+; CHECK: ^13 = gv: (guid: 12, summaries: (variable: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), varFlags: (readonly: 1, writeonly: 0, constant: 0))))
+; CHECK: ^14 = gv: (guid: 13, summaries: (variable: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importType: definition), varFlags: (readonly: 0, writeonly: 0, constant: 0))))
+; CHECK: ^15 = gv: (guid: 14, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 1, live: 1, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 1, funcFlags: (readNone: 0, readOnly: 0, noRecurse: 0, returnDoesNotAlias: 0, noInline: 1, alwaysInline: 0, noUnwind: 0, mayThrow: 0, hasUnknownCall: 0, mustBeUnreachable: 0))))
+; CHECK: ^16 = gv: (guid: 15, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 1, funcFlags: (readNone: 1, readOnly: 0, noRecurse: 1, returnDoesNotAlias: 0, noInline: 0, alwaysInline: 1, noUnwind: 1, mayThrow: 1, hasUnknownCall: 1, mustBeUnreachable: 0))))
+; CHECK: ^17 = gv: (guid: 16, summaries: (function: (module: ^1, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 1, funcFlags: (readNone: 0, readOnly: 1, noRecurse: 0, returnDoesNotAlias: 1, noInline: 0, alwaysInline: 0, noUnwind: 0, mayThrow: 0, hasUnknownCall: 0, mustBeUnreachable: 1), calls: ((callee: ^15)))))
+; CHECK: ^18 = gv: (guid: 17, summaries: (alias: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 1, canAutoHide: 0, importType: definition), aliasee: ^14)))
+; CHECK: ^19 = gv: (guid: 18, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 4, typeIdInfo: (typeTests: (^24, ^26)))))
+; CHECK: ^20 = gv: (guid: 19, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 8, typeIdInfo: (typeTestAssumeVCalls: (vFuncId: (^27, offset: 16))))))
+; CHECK: ^21 = gv: (guid: 20, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 5, typeIdInfo: (typeCheckedLoadVCalls: (vFuncId: (^25, offset: 16))))))
+; CHECK: ^22 = gv: (guid: 21, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 15, typeIdInfo: (typeTestAssumeConstVCalls: ((vFuncId: (^27, offset: 16), args: (42)), (vFuncId: (^27, offset: 24)))))))
+; CHECK: ^23 = gv: (guid: 22, summaries: (function: (module: ^0, flags: (linkage: external, visibility: default, notEligibleToImport: 0, live: 0, dsoLocal: 0, canAutoHide: 0, importType: definition), insts: 5, typeIdInfo: (typeCheckedLoadConstVCalls: ((vFuncId: (^28, offset: 16), args: (42)))))))
; CHECK: ^24 = typeid: (name: "_ZTS1C", summary: (typeTestRes: (kind: single, sizeM1BitWidth: 0))) ; guid = 1884921850105019584
; CHECK: ^25 = typeid: (name: "_ZTS1B", summary: (typeTestRes: (kind: inline, sizeM1BitWidth: 0, alignLog2: 1, sizeM1: 2, bitMask: 3, inlineBits: 4))) ; guid = 6203814149063363976
; CHECK: ^26 = typeid: (name: "_ZTS1A", summary: (typeTestRes: (kind: allOnes, sizeM1BitWidth: 7), wpdResolutions: ((offset: 0, wpdRes: (kind: branchFunnel)), (offset: 8, wpdRes: (kind: singleImpl, singleImplName: "_ZN1A1nEi")), (offset: 16, wpdRes: (kind: indir, resByArg: (args: (1, 2), byArg: (kind: indir, byte: 2, bit: 3), args: (3), byArg: (kind: uniformRetVal, info: 1), args: (4), byArg: (kind: uniqueRetVal, info: 1), args: (5), byArg: (kind: virtualConstProp))))))) ; guid = 7004155349499253778
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