b6cc2c0439
implemented a (codegen) target hook for __builtin_extend_pointer. I'm also making it return a uint64_t instead of an unsigned word; this comports with typical usage (i.e. the one use I know of). I don't know if any of the existing targets requires this hook to be set (other than x86 and x86_64, which I know do not). llvm-svn: 97547
60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
//===---- TargetInfo.h - Encapsulate target details -------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// These classes wrap the information about a call or function
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// definition used to handle ABI compliancy.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CLANG_CODEGEN_TARGETINFO_H
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#define CLANG_CODEGEN_TARGETINFO_H
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namespace llvm {
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class GlobalValue;
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}
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namespace clang {
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class ABIInfo;
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class Decl;
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namespace CodeGen {
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class CodeGenModule;
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}
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/// TargetCodeGenInfo - This class organizes various target-specific
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/// codegeneration issues, like target-specific attributes, builtins and so
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/// on.
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class TargetCodeGenInfo {
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ABIInfo *Info;
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public:
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// WARNING: Acquires the ownership of ABIInfo.
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TargetCodeGenInfo(ABIInfo *info = 0):Info(info) { }
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virtual ~TargetCodeGenInfo();
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/// getABIInfo() - Returns ABI info helper for the target.
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const ABIInfo& getABIInfo() const { return *Info; }
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/// SetTargetAttributes - Provides a convenient hook to handle extra
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/// target-specific attributes for the given global.
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virtual void SetTargetAttributes(const Decl *D, llvm::GlobalValue *GV,
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CodeGen::CodeGenModule &M) const { }
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/// Controls whether __builtin_extend_pointer should sign-extend
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/// pointers to uint64_t or zero-extend them (the default). Has
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/// no effect for targets:
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/// - that have 64-bit pointers, or
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/// - that cannot address through registers larger than pointers, or
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/// - that implicitly ignore/truncate the top bits when addressing
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/// through such registers.
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virtual bool extendPointerWithSExt() const { return false; }
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};
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}
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#endif // CLANG_CODEGEN_TARGETINFO_H
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