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Revert "[RemoveDIs] Load into new debug info format by default in LLVM (#89799)"
A unit test was broken by the above commit: https://lab.llvm.org/buildbot/#/builders/139/builds/64627 This reverts commit 2f01fd9.
1 parent 2f01fd9 commit 00821fe

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-143
lines changed

16 files changed

+61
-143
lines changed

‎llvm/docs/ReleaseNotes.rst

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@@ -170,13 +170,6 @@ Changes to the Metadata Info
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Changes to the Debug Info
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---------------------------------
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* LLVM has switched from using debug intrinsics internally to using debug
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records by default. This should happen transparently when using the DIBuilder
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to construct debug variable information, but will require changes for any code
176-
that interacts with debug intrinsics directly. Debug intrinsics will only be
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supported on a best-effort basis from here onwards; for more information, see
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the `migration docs <https://llvm.org/docs/RemoveDIsDebugInfo.html>`_.
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Changes to the LLVM tools
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---------------------------------
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* llvm-nm and llvm-objdump can now print symbol information from linked

‎llvm/include/llvm/AsmParser/LLParser.h

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@@ -337,6 +337,7 @@ namespace llvm {
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// Top-Level Entities
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bool parseTopLevelEntities();
340+
bool finalizeDebugInfoFormat(Module *M);
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void dropUnknownMetadataReferences();
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bool validateEndOfModule(bool UpgradeDebugInfo);
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bool validateEndOfIndex();

‎llvm/lib/AsmParser/LLParser.cpp

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@@ -74,6 +74,23 @@ static std::string getTypeString(Type *T) {
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return Tmp.str();
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}
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77+
// Whatever debug info format we parsed, we should convert to the expected debug
78+
// info format immediately afterwards.
79+
bool LLParser::finalizeDebugInfoFormat(Module *M) {
80+
// We should have already returned an error if we observed both intrinsics and
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// records in this IR.
82+
assert(!(SeenNewDbgInfoFormat && SeenOldDbgInfoFormat) &&
83+
"Mixed debug intrinsics/records seen without a parsing error?");
84+
if (PreserveInputDbgFormat == cl::boolOrDefault::BOU_TRUE) {
85+
UseNewDbgInfoFormat = SeenNewDbgInfoFormat;
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WriteNewDbgInfoFormatToBitcode = SeenNewDbgInfoFormat;
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WriteNewDbgInfoFormat = SeenNewDbgInfoFormat;
88+
} else if (M) {
89+
M->setIsNewDbgInfoFormat(false);
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}
91+
return false;
92+
}
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/// Run: module ::= toplevelentity*
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bool LLParser::Run(bool UpgradeDebugInfo,
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DataLayoutCallbackTy DataLayoutCallback) {
@@ -91,7 +108,7 @@ bool LLParser::Run(bool UpgradeDebugInfo,
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}
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return parseTopLevelEntities() || validateEndOfModule(UpgradeDebugInfo) ||
94-
validateEndOfIndex();
111+
validateEndOfIndex() || finalizeDebugInfoFormat(M);
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}
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bool LLParser::parseStandaloneConstantValue(Constant *&C,
@@ -190,18 +207,6 @@ void LLParser::dropUnknownMetadataReferences() {
190207
bool LLParser::validateEndOfModule(bool UpgradeDebugInfo) {
191208
if (!M)
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return false;
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// We should have already returned an error if we observed both intrinsics and
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// records in this IR.
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assert(!(SeenNewDbgInfoFormat && SeenOldDbgInfoFormat) &&
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"Mixed debug intrinsics/records seen without a parsing error?");
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if (PreserveInputDbgFormat == cl::boolOrDefault::BOU_TRUE) {
199-
UseNewDbgInfoFormat = SeenNewDbgInfoFormat;
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WriteNewDbgInfoFormatToBitcode = SeenNewDbgInfoFormat;
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WriteNewDbgInfoFormat = SeenNewDbgInfoFormat;
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M->setNewDbgInfoFormatFlag(SeenNewDbgInfoFormat);
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}
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// Handle any function attribute group forward references.
206211
for (const auto &RAG : ForwardRefAttrGroups) {
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Value *V = RAG.first;
@@ -434,9 +439,6 @@ bool LLParser::validateEndOfModule(bool UpgradeDebugInfo) {
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UpgradeModuleFlags(*M);
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UpgradeSectionAttributes(*M);
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if (PreserveInputDbgFormat != cl::boolOrDefault::BOU_TRUE)
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M->setIsNewDbgInfoFormat(UseNewDbgInfoFormat);
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if (!Slots)
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return false;
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// Initialize the slot mapping.

‎llvm/lib/Bitcode/Reader/BitcodeReader.cpp

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@@ -4319,7 +4319,7 @@ Error BitcodeReader::parseModule(uint64_t ResumeBit,
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if (PreserveInputDbgFormat != cl::boolOrDefault::BOU_TRUE) {
43204320
TheModule->IsNewDbgInfoFormat =
43214321
UseNewDbgInfoFormat &&
4322-
LoadBitcodeIntoNewDbgInfoFormat != cl::boolOrDefault::BOU_FALSE;
4322+
LoadBitcodeIntoNewDbgInfoFormat == cl::boolOrDefault::BOU_TRUE;
43234323
}
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43254325
this->ValueTypeCallback = std::move(Callbacks.ValueType);

‎llvm/lib/IR/BasicBlock.cpp

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@@ -181,7 +181,7 @@ template class llvm::SymbolTableListTraits<Instruction,
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BasicBlock::BasicBlock(LLVMContext &C, const Twine &Name, Function *NewParent,
182182
BasicBlock *InsertBefore)
183183
: Value(Type::getLabelTy(C), Value::BasicBlockVal),
184-
IsNewDbgInfoFormat(UseNewDbgInfoFormat), Parent(nullptr) {
184+
IsNewDbgInfoFormat(false), Parent(nullptr) {
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186186
if (NewParent)
187187
insertInto(NewParent, InsertBefore);

‎llvm/lib/IR/Function.cpp

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Original file line numberDiff line numberDiff line change
@@ -83,8 +83,6 @@ static cl::opt<unsigned> NonGlobalValueMaxNameSize(
8383
"non-global-value-max-name-size", cl::Hidden, cl::init(1024),
8484
cl::desc("Maximum size for the name of non-global values."));
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86-
extern cl::opt<bool> UseNewDbgInfoFormat;
87-
8886
void Function::convertToNewDbgValues() {
8987
IsNewDbgInfoFormat = true;
9088
for (auto &BB : *this) {
@@ -440,7 +438,7 @@ Function::Function(FunctionType *Ty, LinkageTypes Linkage, unsigned AddrSpace,
440438
: GlobalObject(Ty, Value::FunctionVal,
441439
OperandTraits<Function>::op_begin(this), 0, Linkage, name,
442440
computeAddrSpace(AddrSpace, ParentModule)),
443-
NumArgs(Ty->getNumParams()), IsNewDbgInfoFormat(UseNewDbgInfoFormat) {
441+
NumArgs(Ty->getNumParams()), IsNewDbgInfoFormat(false) {
444442
assert(FunctionType::isValidReturnType(getReturnType()) &&
445443
"invalid return type");
446444
setGlobalObjectSubClassData(0);

‎llvm/lib/IR/Module.cpp

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@@ -54,8 +54,6 @@
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5555
using namespace llvm;
5656

57-
extern cl::opt<bool> UseNewDbgInfoFormat;
58-
5957
//===----------------------------------------------------------------------===//
6058
// Methods to implement the globals and functions lists.
6159
//
@@ -74,7 +72,7 @@ template class llvm::SymbolTableListTraits<GlobalIFunc>;
7472
Module::Module(StringRef MID, LLVMContext &C)
7573
: Context(C), ValSymTab(std::make_unique<ValueSymbolTable>(-1)),
7674
ModuleID(std::string(MID)), SourceFileName(std::string(MID)), DL(""),
77-
IsNewDbgInfoFormat(UseNewDbgInfoFormat) {
75+
IsNewDbgInfoFormat(false) {
7876
Context.addModule(this);
7977
}
8078

‎llvm/tools/llvm-as/llvm-as.cpp

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@@ -142,10 +142,11 @@ int main(int argc, char **argv) {
142142
}
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144144
// Convert to new debug format if requested.
145-
M->setIsNewDbgInfoFormat(UseNewDbgInfoFormat &&
146-
WriteNewDbgInfoFormatToBitcode);
147-
if (M->IsNewDbgInfoFormat)
145+
assert(!M->IsNewDbgInfoFormat && "Unexpectedly in new debug mode");
146+
if (UseNewDbgInfoFormat && WriteNewDbgInfoFormatToBitcode) {
147+
M->convertToNewDbgValues();
148148
M->removeDebugIntrinsicDeclarations();
149+
}
149150

150151
std::unique_ptr<ModuleSummaryIndex> Index = std::move(ModuleAndIndex.Index);
151152

‎llvm/tools/llvm-dis/llvm-dis.cpp

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@@ -258,7 +258,7 @@ int main(int argc, char **argv) {
258258
// All that llvm-dis does is write the assembly to a file.
259259
if (!DontPrint) {
260260
if (M) {
261-
M->setIsNewDbgInfoFormat(WriteNewDbgInfoFormat);
261+
ScopedDbgInfoFormatSetter FormatSetter(*M, WriteNewDbgInfoFormat);
262262
if (WriteNewDbgInfoFormat)
263263
M->removeDebugIntrinsicDeclarations();
264264
M->print(Out->os(), Annotator.get(), PreserveAssemblyUseListOrder);

‎llvm/tools/llvm-link/llvm-link.cpp

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Original file line numberDiff line numberDiff line change
@@ -489,6 +489,12 @@ int main(int argc, char **argv) {
489489
if (LoadBitcodeIntoNewDbgInfoFormat == cl::boolOrDefault::BOU_UNSET)
490490
LoadBitcodeIntoNewDbgInfoFormat = cl::boolOrDefault::BOU_TRUE;
491491

492+
// RemoveDIs debug-info transition: tests may request that we /try/ to use the
493+
// new debug-info format.
494+
if (TryUseNewDbgInfoFormat) {
495+
// Turn the new debug-info format on.
496+
UseNewDbgInfoFormat = true;
497+
}
492498
// Since llvm-link collects multiple IR modules together, for simplicity's
493499
// sake we disable the "PreserveInputDbgFormat" flag to enforce a single
494500
// debug info format.
@@ -550,7 +556,7 @@ int main(int argc, char **argv) {
550556
SetFormat(WriteNewDbgInfoFormat);
551557
Composite->print(Out.os(), nullptr, PreserveAssemblyUseListOrder);
552558
} else if (Force || !CheckBitcodeOutputToConsole(Out.os())) {
553-
SetFormat(UseNewDbgInfoFormat && WriteNewDbgInfoFormatToBitcode);
559+
SetFormat(WriteNewDbgInfoFormatToBitcode);
554560
WriteBitcodeToFile(*Composite, Out.os(), PreserveBitcodeUseListOrder);
555561
}
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