e59e848805
Preliminary patch to change lowering/code generation to use llvm::DataLayout information instead of generating "sizeof" GEP (see https://github.com/llvm/llvm-project/issues/71507). Fortran Semantic analysis needs to know about the target type size and alignment to deal with common blocks, and intrinsics like C_SIZEOF/TRANSFER. This information should be obtained from the llvm::DataLayout so that it is consistent during the whole compilation flow. This change is changing flang-new and bbc drivers to: 1. Create the llvm::TargetMachine so that the data layout of the target can be obtained before semantics. 2. Sharing bbc/flang-new set-up of the SemanticConstext.targetCharateristics from the llvm::TargetMachine. For now, the actual part that set-up the Fortran type size and alignment from the llvm::DataLayout is left TODO so that this change is mostly an NFC impacting the drivers. 3. Let the lowering bridge set-up the mlir::Module datalayout attributes since it is doing it for the target attribute, and that allows the llvm data layout information to be available during lowering. For flang-new, the changes are code shuffling: the `llvm::TargetMachine` instance is moved to `CompilerInvocation` class so that it can be used to set-up the semantic contexts. `setMLIRDataLayout` is moved to `flang/Optimizer/Support/DataLayout.h` (it will need to be used from codegen pass for fir-opt target independent testing.)), and the code setting-up semantics targetCharacteristics is moved to `Tools/TargetSetup.h` so that it can be shared with bbc. As a consequence, LLVM targets must be registered when running semantics, and it is not possible to run semantics for a target that is not registered with the -triple option (hence the power pc specific modules can only be built if the PowerPC target is available.
36 lines
599 B
CMake
36 lines
599 B
CMake
set(LLVM_LINK_COMPONENTS
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Passes
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AllTargetsCodeGens
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AllTargetsDescs
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AllTargetsInfos
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TargetParser
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)
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add_flang_tool(bbc bbc.cpp
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DEPENDS
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FIROptCodeGenPassIncGen
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)
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llvm_update_compile_flags(bbc)
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get_property(dialect_libs GLOBAL PROPERTY MLIR_DIALECT_LIBS)
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get_property(extension_libs GLOBAL PROPERTY MLIR_EXTENSION_LIBS)
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target_link_libraries(bbc PRIVATE
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FIRDialect
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FIRDialectSupport
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FIRSupport
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FIRTransforms
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FIRBuilder
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HLFIRDialect
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HLFIRTransforms
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${dialect_libs}
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${extension_libs}
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MLIRAffineToStandard
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MLIRSCFToControlFlow
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FortranCommon
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FortranParser
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FortranEvaluate
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FortranSemantics
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FortranLower
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)
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