38101b4e95
This patch adds support for:
* `-S` in Flang's compiler and frontend drivers,
and implements:
* `-emit-obj` in Flang's frontend driver and `-c` in Flang's compiler
driver (this is consistent with Clang).
(these options were already available before, but only as placeholders).
The semantics of these options in Clang and Flang are identical.
The `EmitObjAction` frontend action is renamed as `BackendAction`. This
new name more accurately reflects the fact that this action will
primarily run the code-gen/backend pipeline in LLVM. It also makes more
sense as an action implementing both `-emit-obj` and `-S` (originally,
it was just `-emit-obj`).
`tripleName` from FirContext.cpp is deleted and, when a target triple is
required, `mlir::LLVM::LLVMDialect::getTargetTripleAttrName()` is used
instead. In practice, this means that `fir.triple` is replaced with
`llvm.target_triple`. The former was effectively ignored. The latter is
used when lowering from the LLVM dialect in MLIR to LLVM IR (i.e. it's
embedded in the generated LLVM IR module). The driver can then re-use
it when configuring the backend. With this change, the LLVM IR files
generated by e.g. `tco` will from now on contain the correct target
triple.
The code-gen.f90 test is replaced with code-gen-x86.f90 and
code-gen-aarch64.f90. With 2 seperate files we can verify that
`--target` is correctly taken into account. LIT configuration is updated
to enable e.g.:
```
! REQUIRES: aarch64-registered-target
```
Differential Revision: https://reviews.llvm.org/D120568
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
//===-- fc1_main.cpp - Flang FC1 Compiler Frontend ------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This is the entry point to the flang -fc1 functionality, which implements the
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// core compiler functionality along with a number of additional tools for
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// demonstration and testing purposes.
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//
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//===----------------------------------------------------------------------===//
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#include "flang/Frontend/CompilerInstance.h"
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#include "flang/Frontend/CompilerInvocation.h"
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#include "flang/Frontend/TextDiagnosticBuffer.h"
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#include "flang/FrontendTool/Utils.h"
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#include "clang/Driver/DriverDiagnostic.h"
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#include "llvm/Option/Arg.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Option/OptTable.h"
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#include "llvm/Support/TargetSelect.h"
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#include <cstdio>
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using namespace Fortran::frontend;
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int fc1_main(llvm::ArrayRef<const char *> argv, const char *argv0) {
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// Create CompilerInstance
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std::unique_ptr<CompilerInstance> flang(new CompilerInstance());
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// Create DiagnosticsEngine for the frontend driver
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flang->CreateDiagnostics();
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if (!flang->HasDiagnostics())
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return 1;
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// We will buffer diagnostics from argument parsing so that we can output
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// them using a well formed diagnostic object.
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TextDiagnosticBuffer *diagsBuffer = new TextDiagnosticBuffer;
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// Create CompilerInvocation - use a dedicated instance of DiagnosticsEngine
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// for parsing the arguments
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llvm::IntrusiveRefCntPtr<clang::DiagnosticIDs> diagID(
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new clang::DiagnosticIDs());
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llvm::IntrusiveRefCntPtr<clang::DiagnosticOptions> diagOpts =
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new clang::DiagnosticOptions();
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clang::DiagnosticsEngine diags(diagID, &*diagOpts, diagsBuffer);
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bool success =
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CompilerInvocation::CreateFromArgs(flang->invocation(), argv, diags);
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// Initialize targets first, so that --version shows registered targets.
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llvm::InitializeAllTargets();
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llvm::InitializeAllTargetMCs();
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llvm::InitializeAllAsmPrinters();
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diagsBuffer->FlushDiagnostics(flang->diagnostics());
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if (!success)
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return 1;
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// Execute the frontend actions.
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success = ExecuteCompilerInvocation(flang.get());
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// Delete output files to free Compiler Instance
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flang->ClearOutputFiles(/*EraseFiles=*/false);
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return !success;
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}
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