Nathan Lanza 1bb52e9462
[CIR] Build out AST consumer patterns to reach the entry point into CIRGen
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
2024-10-09 14:20:50 -04:00

51 lines
822 B
CMake

set(LLVM_LINK_COMPONENTS
Option
Support
)
set(link_libs
clangBasic
clangCodeGen
clangDriver
clangExtractAPI
clangFrontend
clangRewriteFrontend
)
set(deps)
if(CLANG_ENABLE_CIR)
list(APPEND link_libs
clangCIRFrontendAction
MLIRIR
)
endif()
if(CLANG_ENABLE_ARCMT)
list(APPEND link_libs
clangARCMigrate
)
endif()
if(CLANG_ENABLE_STATIC_ANALYZER)
list(APPEND link_libs
clangStaticAnalyzerFrontend
)
endif()
add_clang_library(clangFrontendTool
ExecuteCompilerInvocation.cpp
DEPENDS
ClangDriverOptions
${deps}
LINK_LIBS
${link_libs}
)
if(CLANG_ENABLE_CIR)
target_include_directories(clangFrontendTool PRIVATE ${LLVM_MAIN_SRC_DIR}/../mlir/include)
target_include_directories(clangFrontendTool PRIVATE ${CMAKE_BINARY_DIR}/tools/mlir/include)
endif()