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Diffstat (limited to 'contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.h')
-rw-r--r-- | contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.h b/contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.h new file mode 100644 index 0000000..f0a7824 --- /dev/null +++ b/contrib/llvm/tools/clang/lib/CodeGen/TargetInfo.h @@ -0,0 +1,98 @@ +//===---- TargetInfo.h - Encapsulate target details -------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// These classes wrap the information about a call or function +// definition used to handle ABI compliancy. +// +//===----------------------------------------------------------------------===// + +#ifndef CLANG_CODEGEN_TARGETINFO_H +#define CLANG_CODEGEN_TARGETINFO_H + +namespace llvm { + class GlobalValue; + class Value; +} + +namespace clang { + class ABIInfo; + class Decl; + + namespace CodeGen { + class CodeGenModule; + class CodeGenFunction; + } + + /// TargetCodeGenInfo - This class organizes various target-specific + /// codegeneration issues, like target-specific attributes, builtins and so + /// on. + class TargetCodeGenInfo { + ABIInfo *Info; + public: + // WARNING: Acquires the ownership of ABIInfo. + TargetCodeGenInfo(ABIInfo *info = 0):Info(info) { } + virtual ~TargetCodeGenInfo(); + + /// getABIInfo() - Returns ABI info helper for the target. + const ABIInfo& getABIInfo() const { return *Info; } + + /// SetTargetAttributes - Provides a convenient hook to handle extra + /// target-specific attributes for the given global. + virtual void SetTargetAttributes(const Decl *D, llvm::GlobalValue *GV, + CodeGen::CodeGenModule &M) const { } + + /// Controls whether __builtin_extend_pointer should sign-extend + /// pointers to uint64_t or zero-extend them (the default). Has + /// no effect for targets: + /// - that have 64-bit pointers, or + /// - that cannot address through registers larger than pointers, or + /// - that implicitly ignore/truncate the top bits when addressing + /// through such registers. + virtual bool extendPointerWithSExt() const { return false; } + + /// Determines the DWARF register number for the stack pointer, for + /// exception-handling purposes. Implements __builtin_dwarf_sp_column. + /// + /// Returns -1 if the operation is unsupported by this target. + virtual int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const { + return -1; + } + + /// Initializes the given DWARF EH register-size table, a char*. + /// Implements __builtin_init_dwarf_reg_size_table. + /// + /// Returns true if the operation is unsupported by this target. + virtual bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF, + llvm::Value *Address) const { + return true; + } + + /// Performs the code-generation required to convert a return + /// address as stored by the system into the actual address of the + /// next instruction that will be executed. + /// + /// Used by __builtin_extract_return_addr(). + virtual llvm::Value *decodeReturnAddress(CodeGen::CodeGenFunction &CGF, + llvm::Value *Address) const { + return Address; + } + + /// Performs the code-generation required to convert the address + /// of an instruction into a return address suitable for storage + /// by the system in a return slot. + /// + /// Used by __builtin_frob_return_addr(). + virtual llvm::Value *encodeReturnAddress(CodeGen::CodeGenFunction &CGF, + llvm::Value *Address) const { + return Address; + } + }; +} + +#endif // CLANG_CODEGEN_TARGETINFO_H |