1bb52e9462
Build out the necessary infrastructure for the main entry point into ClangIR generation -- CIRGenModule. A set of boilerplate classes exist to facilitate this -- CIRGenerator, CIRGenAction, EmitCIRAction and CIRGenConsumer. These all mirror the corresponding types from LLVM generation by Clang's CodeGen. The main entry point to CIR generation is `CIRGenModule::buildTopLevelDecl`. It is currently just an empty function. We've added a test to ensure that the pipeline reaches this point and doesn't fail, but does nothing else. This will be removed in one of the subsequent patches that'll add basic `cir.func` emission. This patch also re-adds `-emit-cir` to the driver. lib/Driver/Driver.cpp requires that a driver flag exists to facilirate the selection of the right actions for the driver to create. Without a driver flag you get the standard behaviors of `-S`, `-c`, etc. If we want to emit CIR IR and, eventually, bytecode we'll need a driver flag to force this. This is why `-emit-llvm` is a driver flag. Notably, `-emit-llvm-bc` as a cc1 flag doesn't ever do the right thing. Without a driver flag it is incorrectly ignored and an executable is emitted. With `-S` a file named `something.s` is emitted which actually contains bitcode. Reviewers: AaronBallman, MaskRay, bcardosolopes Reviewed By: bcardosolopes, AaronBallman Pull Request: https://github.com/llvm/llvm-project/pull/91007
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
//===--- CIRGenerator.cpp - Emit CIR from ASTs ----------------------------===//
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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 builds an AST and converts it to CIR.
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//
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//===----------------------------------------------------------------------===//
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#include "CIRGenModule.h"
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#include "clang/AST/DeclGroup.h"
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#include "clang/CIR/CIRGenerator.h"
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using namespace cir;
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using namespace clang;
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void CIRGenerator::anchor() {}
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CIRGenerator::CIRGenerator(clang::DiagnosticsEngine &diags,
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llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> vfs,
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const CodeGenOptions &cgo)
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: diags(diags), fs(std::move(vfs)), codeGenOpts{cgo} {}
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CIRGenerator::~CIRGenerator() = default;
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void CIRGenerator::Initialize(ASTContext &astCtx) {
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using namespace llvm;
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this->astCtx = &astCtx;
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cgm = std::make_unique<CIRGenModule>(*mlirCtx, astCtx, codeGenOpts, diags);
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}
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bool CIRGenerator::HandleTopLevelDecl(DeclGroupRef group) {
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for (Decl *decl : group)
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cgm->buildTopLevelDecl(decl);
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return true;
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}
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