diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td --- a/clang/include/clang/Driver/Options.td +++ b/clang/include/clang/Driver/Options.td @@ -4266,9 +4266,9 @@ Alias; def r : Flag<["-"], "r">, Flags<[LinkerInput,NoArgumentUnused]>, Group; -def save_temps_EQ : Joined<["-", "--"], "save-temps=">, Flags<[CC1Option, FlangOption, NoXarchOption]>, +def save_temps_EQ : Joined<["-", "--"], "save-temps=">, Flags<[CC1Option, FlangOption, FC1Option, NoXarchOption]>, HelpText<"Save intermediate compilation results.">; -def save_temps : Flag<["-", "--"], "save-temps">, Flags<[FlangOption, NoXarchOption]>, +def save_temps : Flag<["-", "--"], "save-temps">, Flags<[FlangOption, FC1Option, NoXarchOption]>, Alias, AliasArgs<["cwd"]>, HelpText<"Save intermediate compilation results">; def save_stats_EQ : Joined<["-", "--"], "save-stats=">, Flags<[NoXarchOption]>, diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp --- a/clang/lib/Driver/ToolChains/Flang.cpp +++ b/clang/lib/Driver/ToolChains/Flang.cpp @@ -402,6 +402,9 @@ assert(Input.isFilename() && "Invalid input."); + if (Args.getLastArg(options::OPT_save_temps_EQ)) + Args.AddLastArg(CmdArgs, options::OPT_save_temps_EQ); + addDashXForInput(Args, Input, CmdArgs); CmdArgs.push_back(Input.getFilename()); diff --git a/flang/include/flang/Frontend/CodeGenOptions.h b/flang/include/flang/Frontend/CodeGenOptions.h --- a/flang/include/flang/Frontend/CodeGenOptions.h +++ b/flang/include/flang/Frontend/CodeGenOptions.h @@ -21,6 +21,7 @@ #include "llvm/Transforms/Instrumentation/AddressSanitizerOptions.h" #include #include +#include #include #include @@ -53,6 +54,9 @@ /// are offloading binaries containing device images and metadata. std::vector OffloadObjects; + /// The directory where temp files are stored if specified by -save-temps + std::optional SaveTempsDir; + // Define accessors/mutators for code generation options of enumeration type. #define CODEGENOPT(Name, Bits, Default) #define ENUM_CODEGENOPT(Name, Type, Bits, Default) \ diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp --- a/flang/lib/Frontend/CompilerInvocation.cpp +++ b/flang/lib/Frontend/CompilerInvocation.cpp @@ -150,6 +150,9 @@ opts.PrepareForThinLTO = true; } + if (auto *a = args.getLastArg(clang::driver::options::OPT_save_temps_EQ)) + opts.SaveTempsDir = a->getValue(); + // -mrelocation-model option. if (const llvm::opt::Arg *a = args.getLastArg(clang::driver::options::OPT_mrelocation_model)) { diff --git a/flang/lib/Frontend/FrontendActions.cpp b/flang/lib/Frontend/FrontendActions.cpp --- a/flang/lib/Frontend/FrontendActions.cpp +++ b/flang/lib/Frontend/FrontendActions.cpp @@ -13,6 +13,7 @@ #include "flang/Frontend/FrontendActions.h" #include "flang/Common/default-kinds.h" #include "flang/Frontend/CompilerInstance.h" +#include "flang/Frontend/CompilerInvocation.h" #include "flang/Frontend/FrontendOptions.h" #include "flang/Frontend/PreprocessorOptions.h" #include "flang/Lower/Bridge.h" @@ -52,10 +53,14 @@ #include "llvm/Passes/PassPlugin.h" #include "llvm/Passes/StandardInstrumentations.h" #include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/FileSystem.h" +#include "llvm/Support/Path.h" #include "llvm/Support/SourceMgr.h" +#include "llvm/Support/ToolOutputFile.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Transforms/Utils/ModuleUtils.h" #include +#include using namespace Fortran::frontend; @@ -64,6 +69,48 @@ llvm::PassPluginLibraryInfo get##Ext##PluginInfo(); #include "llvm/Support/Extension.def" +/// Save the given \c mlirModule to a temporary .mlir file, in a location +/// decided by the -save-temps flag. No files are produced if the flag is not +/// specified. +static bool saveMLIRTempFile(const CompilerInvocation &ci, + mlir::ModuleOp mlirModule, + llvm::StringRef inputFile, + llvm::StringRef outputTag) { + if (!ci.getCodeGenOpts().SaveTempsDir.has_value()) + return true; + + const std::string &compilerOutFile = ci.getFrontendOpts().outputFile; + const std::string &dir = ci.getCodeGenOpts().SaveTempsDir.value(); + std::string outDir = + llvm::StringSwitch(dir) + .Case("cwd", "") + .Case("obj", llvm::sys::path::parent_path(compilerOutFile).str()) + .Default(dir); + + if (llvm::sys::fs::is_directory(outDir)) + outDir.append("/"); + + // Build file name from the compiler output file name, triple, cpu and OpenMP + // information + llvm::StringRef input = llvm::sys::path::filename(inputFile); + std::string outFile = input.substr(0, input.find_last_of('.')) + .str() + .append("-") + .append(outputTag.str()) + .append(".mlir"); + + std::error_code ec; + llvm::ToolOutputFile out(outDir + outFile, ec, llvm::sys::fs::OF_Text); + if (ec) + return false; + + mlirModule->print(out.os()); + out.os().close(); + out.keep(); + + return true; +} + //===----------------------------------------------------------------------===// // Custom BeginSourceFileAction //===----------------------------------------------------------------------===// @@ -208,6 +255,15 @@ return false; } + // FIR.mlir: This is 1st -save-temps file created for mlir + if (!saveMLIRTempFile(ci.getInvocation(), *mlirModule, getCurrentFile(), + "FIR")) { + unsigned diagID = ci.getDiagnostics().getCustomDiagID( + clang::DiagnosticsEngine::Error, "Saving MLIR temp file failed"); + ci.getDiagnostics().Report(diagID); + return false; + } + return true; } @@ -565,6 +621,15 @@ ci.getDiagnostics().Report(diagID); } + // LLVMIR.mlir: This is 2nd -save-temps file created for mlir + if (!saveMLIRTempFile(ci.getInvocation(), *mlirModule, getCurrentFile(), + "LLVMIR")) { + unsigned diagID = ci.getDiagnostics().getCustomDiagID( + clang::DiagnosticsEngine::Error, "Saving MLIR temp file failed"); + ci.getDiagnostics().Report(diagID); + return; + } + // Translate to LLVM IR std::optional moduleName = mlirModule->getName(); llvmModule = mlir::translateModuleToLLVMIR( diff --git a/flang/test/Driver/driver-help.f90 b/flang/test/Driver/driver-help.f90 --- a/flang/test/Driver/driver-help.f90 +++ b/flang/test/Driver/driver-help.f90 @@ -170,6 +170,8 @@ ! HELP-FC1-NEXT: -pic-level Value for __PIC__ ! HELP-FC1-NEXT: -plugin Use the named plugin action instead of the default action (use "help" to list available options) ! HELP-FC1-NEXT: -P Disable linemarker output in -E mode +! HELP-FC1-NEXT: -save-temps= Save intermediate compilation results. +! HELP-FC1-NEXT: -save-temps Save intermediate compilation results ! HELP-FC1-NEXT: -std= Language standard to compile for ! HELP-FC1-NEXT: -S Only run preprocess and compilation steps ! HELP-FC1-NEXT: -target-cpu Target a specific cpu type diff --git a/flang/test/Driver/frontend-forwarding.f90 b/flang/test/Driver/frontend-forwarding.f90 --- a/flang/test/Driver/frontend-forwarding.f90 +++ b/flang/test/Driver/frontend-forwarding.f90 @@ -15,7 +15,8 @@ ! RUN: -fassociative-math \ ! RUN: -freciprocal-math \ ! RUN: -fpass-plugin=Bye%pluginext \ -! RUN: -mllvm -print-before-all\ +! RUN: -mllvm -print-before-all \ +! RUN: -save-temps=obj \ ! RUN: -P \ ! RUN: | FileCheck %s @@ -34,3 +35,4 @@ ! CHECK: "-fconvert=little-endian" ! CHECK: "-fpass-plugin=Bye ! CHECK: "-mllvm" "-print-before-all" +! CHECK: "-save-temps=obj" diff --git a/flang/test/Driver/save-temps.f90 b/flang/test/Driver/save-temps.f90 --- a/flang/test/Driver/save-temps.f90 +++ b/flang/test/Driver/save-temps.f90 @@ -53,3 +53,15 @@ ! NO-TEMPS: "-fc1" ! NO-TEMPS-SAME: "-S" ! NO-TEMPS-SAME: "-o" "save-temps.s" + +!-------------------------- +! MLIR generation +!-------------------------- +! RUN: rm -rf %t && mkdir -p %t +! RUN: %flang_fc1 -emit-llvm-bc -save-temps=obj -o %t/out.bc %s 2>&1 +! RUN: FileCheck %s -input-file=%t/save-temps-FIR.mlir -check-prefix=MLIR-FIR +! RUN: FileCheck %s -input-file=%t/save-temps-LLVMIR.mlir -check-prefix=MLIR-LLVMIR +! MLIR-FIR: func.func @{{.*}}main() { +! MLIR-LLVMIR: llvm.func @{{.*}}main() { + +end program