[clang] 6598795 - [flang] Add -fhermetic-module-files (#98083)
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cfe-commits at lists.llvm.org
Thu Jul 11 14:02:48 PDT 2024
Author: Peter Klausler
Date: 2024-07-11T14:02:44-07:00
New Revision: 65987954d9903e4fa3dfbf1ccac9d942d4af1fbb
URL: https://github.com/llvm/llvm-project/commit/65987954d9903e4fa3dfbf1ccac9d942d4af1fbb
DIFF: https://github.com/llvm/llvm-project/commit/65987954d9903e4fa3dfbf1ccac9d942d4af1fbb.diff
LOG: [flang] Add -fhermetic-module-files (#98083)
Module files emitted by this Fortran compiler are valid Fortran source
files. Symbols that are USE-associated into modules are represented in
their module files with USE statements and special comments with hash
codes in them to ensure that those USE statements resolve to the same
modules that were used to build the module when its module file was
generated.
This scheme prevents unchecked module file growth in large applications
by not emitting USE-associated symbols redundantly. This problem can be
especially bad when derived type definitions must be repeated in the
module files of their clients, and the clients of those modules, and so
on. However, this scheme has the disadvantage that clients of modules
must be compiled with dependent modules in the module search path.
This new -fhermetic-module-files option causes module file output to be
free of dependences on any non-intrinsic module files; dependent modules
are instead emitted as part of the module file, rather than being
USE-associated. It is intended for top level library module files that
are shipped with binary libraries when it is not convenient to collect
and ship their dependent module files as well.
Fixes https://github.com/llvm/llvm-project/issues/97398.
Added:
flang/test/Semantics/modfile65.f90
Modified:
clang/include/clang/Driver/Options.td
clang/lib/Driver/ToolChains/Flang.cpp
flang/include/flang/Frontend/CompilerInvocation.h
flang/include/flang/Semantics/semantics.h
flang/lib/Frontend/CompilerInvocation.cpp
flang/lib/Frontend/FrontendAction.cpp
flang/lib/Semantics/mod-file.cpp
flang/lib/Semantics/mod-file.h
flang/lib/Semantics/semantics.cpp
Removed:
################################################################################
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index a4859149bbfe3..f1e8cb87e5321 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -6687,6 +6687,9 @@ defm stack_arrays : BoolOptionWithoutMarshalling<"f", "stack-arrays",
defm loop_versioning : BoolOptionWithoutMarshalling<"f", "version-loops-for-stride",
PosFlag<SetTrue, [], [ClangOption], "Create unit-strided versions of loops">,
NegFlag<SetFalse, [], [ClangOption], "Do not create unit-strided loops (default)">>;
+
+def fhermetic_module_files : Flag<["-"], "fhermetic-module-files">, Group<f_Group>,
+ HelpText<"Emit hermetic module files (no nested USE association)">;
} // let Visibility = [FC1Option, FlangOption]
def J : JoinedOrSeparate<["-"], "J">,
diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index ee8292a508f93..939d89bb1e2fe 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -35,18 +35,26 @@ static void addDashXForInput(const ArgList &Args, const InputInfo &Input,
void Flang::addFortranDialectOptions(const ArgList &Args,
ArgStringList &CmdArgs) const {
- Args.addAllArgs(
- CmdArgs, {options::OPT_ffixed_form, options::OPT_ffree_form,
- options::OPT_ffixed_line_length_EQ, options::OPT_fopenacc,
- options::OPT_finput_charset_EQ, options::OPT_fimplicit_none,
- options::OPT_fno_implicit_none, options::OPT_fbackslash,
- options::OPT_fno_backslash, options::OPT_flogical_abbreviations,
- options::OPT_fno_logical_abbreviations,
- options::OPT_fxor_operator, options::OPT_fno_xor_operator,
- options::OPT_falternative_parameter_statement,
- options::OPT_fdefault_real_8, options::OPT_fdefault_integer_8,
- options::OPT_fdefault_double_8, options::OPT_flarge_sizes,
- options::OPT_fno_automatic});
+ Args.addAllArgs(CmdArgs, {options::OPT_ffixed_form,
+ options::OPT_ffree_form,
+ options::OPT_ffixed_line_length_EQ,
+ options::OPT_fopenacc,
+ options::OPT_finput_charset_EQ,
+ options::OPT_fimplicit_none,
+ options::OPT_fno_implicit_none,
+ options::OPT_fbackslash,
+ options::OPT_fno_backslash,
+ options::OPT_flogical_abbreviations,
+ options::OPT_fno_logical_abbreviations,
+ options::OPT_fxor_operator,
+ options::OPT_fno_xor_operator,
+ options::OPT_falternative_parameter_statement,
+ options::OPT_fdefault_real_8,
+ options::OPT_fdefault_integer_8,
+ options::OPT_fdefault_double_8,
+ options::OPT_flarge_sizes,
+ options::OPT_fno_automatic,
+ options::OPT_fhermetic_module_files});
}
void Flang::addPreprocessingOptions(const ArgList &Args,
diff --git a/flang/include/flang/Frontend/CompilerInvocation.h b/flang/include/flang/Frontend/CompilerInvocation.h
index 0fefaecfe4f06..d1646f585cf85 100644
--- a/flang/include/flang/Frontend/CompilerInvocation.h
+++ b/flang/include/flang/Frontend/CompilerInvocation.h
@@ -99,6 +99,7 @@ class CompilerInvocation : public CompilerInvocationBase {
std::string moduleFileSuffix = ".mod";
bool debugModuleDir = false;
+ bool hermeticModuleFileOutput = false;
bool warnAsErr = false;
@@ -179,6 +180,11 @@ class CompilerInvocation : public CompilerInvocationBase {
bool &getDebugModuleDir() { return debugModuleDir; }
const bool &getDebugModuleDir() const { return debugModuleDir; }
+ bool &getHermeticModuleFileOutput() { return hermeticModuleFileOutput; }
+ const bool &getHermeticModuleFileOutput() const {
+ return hermeticModuleFileOutput;
+ }
+
bool &getWarnAsErr() { return warnAsErr; }
const bool &getWarnAsErr() const { return warnAsErr; }
@@ -244,6 +250,9 @@ class CompilerInvocation : public CompilerInvocationBase {
}
void setDebugModuleDir(bool flag) { debugModuleDir = flag; }
+ void setHermeticModuleFileOutput(bool flag) {
+ hermeticModuleFileOutput = flag;
+ }
void setWarnAsErr(bool flag) { warnAsErr = flag; }
diff --git a/flang/include/flang/Semantics/semantics.h b/flang/include/flang/Semantics/semantics.h
index d382663762bc3..3ee71fe485524 100644
--- a/flang/include/flang/Semantics/semantics.h
+++ b/flang/include/flang/Semantics/semantics.h
@@ -307,10 +307,11 @@ class SemanticsContext {
class Semantics {
public:
- explicit Semantics(SemanticsContext &context, parser::Program &program,
- bool debugModuleWriter = false)
- : context_{context}, program_{program} {
- context.set_debugModuleWriter(debugModuleWriter);
+ explicit Semantics(SemanticsContext &context, parser::Program &program)
+ : context_{context}, program_{program} {}
+ Semantics &set_hermeticModuleFileOutput(bool yes = true) {
+ hermeticModuleFileOutput_ = yes;
+ return *this;
}
SemanticsContext &context() const { return context_; }
@@ -326,6 +327,7 @@ class Semantics {
private:
SemanticsContext &context_;
parser::Program &program_;
+ bool hermeticModuleFileOutput_{false};
};
// Base class for semantics checkers.
diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp
index e2d60ad46f14f..37b50702c7063 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -833,6 +833,11 @@ static bool parseSemaArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
res.setDebugModuleDir(true);
}
+ // -fhermetic-module-files option
+ if (args.hasArg(clang::driver::options::OPT_fhermetic_module_files)) {
+ res.setHermeticModuleFileOutput(true);
+ }
+
// -module-suffix
if (const auto *moduleSuffix =
args.getLastArg(clang::driver::options::OPT_module_suffix)) {
diff --git a/flang/lib/Frontend/FrontendAction.cpp b/flang/lib/Frontend/FrontendAction.cpp
index 765e203ddfbe5..42a614fe46be5 100644
--- a/flang/lib/Frontend/FrontendAction.cpp
+++ b/flang/lib/Frontend/FrontendAction.cpp
@@ -180,11 +180,14 @@ bool FrontendAction::runSemanticChecks() {
// so that they are merged and all printed in order.
auto &semanticsCtx{ci.getSemanticsContext()};
semanticsCtx.messages().Annex(std::move(ci.getParsing().messages()));
+ semanticsCtx.set_debugModuleWriter(ci.getInvocation().getDebugModuleDir());
// Prepare semantics
- ci.setSemantics(std::make_unique<Fortran::semantics::Semantics>(
- semanticsCtx, *parseTree, ci.getInvocation().getDebugModuleDir()));
+ ci.setSemantics(std::make_unique<Fortran::semantics::Semantics>(semanticsCtx,
+ *parseTree));
auto &semantics = ci.getSemantics();
+ semantics.set_hermeticModuleFileOutput(
+ ci.getInvocation().getHermeticModuleFileOutput());
// Run semantic checks
semantics.Perform();
diff --git a/flang/lib/Semantics/mod-file.cpp b/flang/lib/Semantics/mod-file.cpp
index d7f149467dd7a..a1c4c031ca509 100644
--- a/flang/lib/Semantics/mod-file.cpp
+++ b/flang/lib/Semantics/mod-file.cpp
@@ -141,10 +141,26 @@ void ModFileWriter::Write(const Symbol &symbol) {
auto ancestorName{ancestor ? ancestor->GetName().value().ToString() : ""s};
auto path{context_.moduleDirectory() + '/' +
ModFileName(symbol.name(), ancestorName, context_.moduleFileSuffix())};
- PutSymbols(DEREF(symbol.scope()));
+
+ UnorderedSymbolSet hermeticModules;
+ hermeticModules.insert(symbol);
+ UnorderedSymbolSet additionalModules;
+ PutSymbols(DEREF(symbol.scope()),
+ hermeticModuleFileOutput_ ? &additionalModules : nullptr);
+ auto asStr{GetAsString(symbol)};
+ while (!additionalModules.empty()) {
+ for (auto ref : UnorderedSymbolSet{std::move(additionalModules)}) {
+ if (hermeticModules.insert(*ref).second &&
+ !ref->owner().IsIntrinsicModules()) {
+ PutSymbols(DEREF(ref->scope()), &additionalModules);
+ asStr += GetAsString(*ref);
+ }
+ }
+ }
+
ModuleCheckSumType checkSum;
- if (std::error_code error{WriteFile(
- path, GetAsString(symbol), checkSum, context_.debugModuleWriter())}) {
+ if (std::error_code error{
+ WriteFile(path, asStr, checkSum, context_.debugModuleWriter())}) {
context_.Say(
symbol.name(), "Error writing %s: %s"_err_en_US, path, error.message());
}
@@ -157,7 +173,7 @@ void ModFileWriter::WriteClosure(llvm::raw_ostream &out, const Symbol &symbol,
!nonIntrinsicModulesWritten.insert(symbol).second) {
return;
}
- PutSymbols(DEREF(symbol.scope()));
+ PutSymbols(DEREF(symbol.scope()), /*hermeticModules=*/nullptr);
needsBuf_.clear(); // omit module checksums
auto str{GetAsString(symbol)};
for (auto depRef : std::move(usedNonIntrinsicModules_)) {
@@ -338,7 +354,8 @@ void ModFileWriter::PrepareRenamings(const Scope &scope) {
}
// Put out the visible symbols from scope.
-void ModFileWriter::PutSymbols(const Scope &scope) {
+void ModFileWriter::PutSymbols(
+ const Scope &scope, UnorderedSymbolSet *hermeticModules) {
SymbolVector sorted;
SymbolVector uses;
auto &renamings{context_.moduleFileOutputRenamings()};
@@ -349,11 +366,16 @@ void ModFileWriter::PutSymbols(const Scope &scope) {
// Write module files for dependencies first so that their
// hashes are known.
for (auto ref : modules) {
- Write(*ref);
- needs_ << ModHeader::need
- << CheckSumString(ref->get<ModuleDetails>().moduleFileHash().value())
- << (ref->owner().IsIntrinsicModules() ? " i " : " n ")
- << ref->name().ToString() << '\n';
+ if (hermeticModules) {
+ hermeticModules->insert(*ref);
+ } else {
+ Write(*ref);
+ needs_ << ModHeader::need
+ << CheckSumString(
+ ref->get<ModuleDetails>().moduleFileHash().value())
+ << (ref->owner().IsIntrinsicModules() ? " i " : " n ")
+ << ref->name().ToString() << '\n';
+ }
}
std::string buf; // stuff after CONTAINS in derived type
llvm::raw_string_ostream typeBindings{buf};
diff --git a/flang/lib/Semantics/mod-file.h b/flang/lib/Semantics/mod-file.h
index be44780bef438..49bcef0c923fb 100644
--- a/flang/lib/Semantics/mod-file.h
+++ b/flang/lib/Semantics/mod-file.h
@@ -37,6 +37,10 @@ class ModFileWriter {
bool WriteAll();
void WriteClosure(llvm::raw_ostream &, const Symbol &,
UnorderedSymbolSet &nonIntrinsicModulesWritten);
+ ModFileWriter &set_hermeticModuleFileOutput(bool yes = true) {
+ hermeticModuleFileOutput_ = yes;
+ return *this;
+ }
private:
SemanticsContext &context_;
@@ -57,13 +61,14 @@ class ModFileWriter {
llvm::raw_string_ostream decls_{declsBuf_};
llvm::raw_string_ostream contains_{containsBuf_};
bool isSubmodule_{false};
+ bool hermeticModuleFileOutput_{false};
void WriteAll(const Scope &);
void WriteOne(const Scope &);
void Write(const Symbol &);
std::string GetAsString(const Symbol &);
void PrepareRenamings(const Scope &);
- void PutSymbols(const Scope &);
+ void PutSymbols(const Scope &, UnorderedSymbolSet *hermetic);
// Returns true if a derived type with bindings and "contains" was emitted
bool PutComponents(const Symbol &);
void PutSymbol(llvm::raw_ostream &, const Symbol &);
diff --git a/flang/lib/Semantics/semantics.cpp b/flang/lib/Semantics/semantics.cpp
index 1bb0679b75110..c09734e5676f3 100644
--- a/flang/lib/Semantics/semantics.cpp
+++ b/flang/lib/Semantics/semantics.cpp
@@ -602,7 +602,9 @@ bool Semantics::Perform() {
CanonicalizeCUDA(program_) &&
CanonicalizeDirectives(context_.messages(), program_) &&
PerformStatementSemantics(context_, program_) &&
- ModFileWriter{context_}.WriteAll();
+ ModFileWriter{context_}
+ .set_hermeticModuleFileOutput(hermeticModuleFileOutput_)
+ .WriteAll();
}
void Semantics::EmitMessages(llvm::raw_ostream &os) {
diff --git a/flang/test/Semantics/modfile65.f90 b/flang/test/Semantics/modfile65.f90
new file mode 100644
index 0000000000000..249255e02129f
--- /dev/null
+++ b/flang/test/Semantics/modfile65.f90
@@ -0,0 +1,53 @@
+! RUN: %python %S/test_modfile.py %s %flang_fc1 -fhermetic-module-files
+module m1
+ integer, parameter :: n = 123
+end
+
+module m2
+ use m1
+end
+
+module m3
+ use m1, m => n
+end
+
+module m4
+ use m2
+ use m3
+end
+
+!Expect: m1.mod
+!module m1
+!integer(4),parameter::n=123_4
+!end
+
+!Expect: m2.mod
+!module m2
+!use m1,only:n
+!end
+!module m1
+!integer(4),parameter::n=123_4
+!end
+
+!Expect: m3.mod
+!module m3
+!use m1,only:m=>n
+!end
+!module m1
+!integer(4),parameter::n=123_4
+!end
+
+!Expect: m4.mod
+!module m4
+!use m2,only:n
+!use m3,only:m
+!end
+!module m2
+!use m1,only:n
+!end
+!module m3
+!use m1,only:m=>n
+!end
+!module m1
+!integer(4),parameter::n=123_4
+!end
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