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40d080e3b7
thinking of generalizing it to be able to specify other freedoms beyond accuracy (such as that NaN's don't have to be respected). I'd like the 3.1 release (the first one with this metadata) to have the more generic name already rather than having to auto-upgrade it in 3.2. llvm-svn: 154744
112 lines
4.0 KiB
C++
112 lines
4.0 KiB
C++
//===-- llvm/LLVMContext.h - Class for managing "global" state --*- 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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// This file declares LLVMContext, a container of "global" state in LLVM, such
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// as the global type and constant uniquing tables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LLVMCONTEXT_H
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#define LLVM_LLVMCONTEXT_H
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namespace llvm {
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class LLVMContextImpl;
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class StringRef;
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class Twine;
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class Instruction;
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class Module;
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class SMDiagnostic;
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template <typename T> class SmallVectorImpl;
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/// This is an important class for using LLVM in a threaded context. It
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/// (opaquely) owns and manages the core "global" data of LLVM's core
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/// infrastructure, including the type and constant uniquing tables.
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/// LLVMContext itself provides no locking guarantees, so you should be careful
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/// to have one context per thread.
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class LLVMContext {
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public:
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LLVMContextImpl *const pImpl;
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LLVMContext();
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~LLVMContext();
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// Pinned metadata names, which always have the same value. This is a
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// compile-time performance optimization, not a correctness optimization.
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enum {
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MD_dbg = 0, // "dbg"
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MD_tbaa = 1, // "tbaa"
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MD_prof = 2, // "prof"
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MD_fpmath = 3, // "fpmath"
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MD_range = 4 // "range"
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};
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/// getMDKindID - Return a unique non-zero ID for the specified metadata kind.
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/// This ID is uniqued across modules in the current LLVMContext.
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unsigned getMDKindID(StringRef Name) const;
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/// getMDKindNames - Populate client supplied SmallVector with the name for
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/// custom metadata IDs registered in this LLVMContext.
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void getMDKindNames(SmallVectorImpl<StringRef> &Result) const;
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typedef void (*InlineAsmDiagHandlerTy)(const SMDiagnostic&, void *Context,
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unsigned LocCookie);
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/// setInlineAsmDiagnosticHandler - This method sets a handler that is invoked
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/// when problems with inline asm are detected by the backend. The first
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/// argument is a function pointer and the second is a context pointer that
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/// gets passed into the DiagHandler.
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///
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/// LLVMContext doesn't take ownership or interpret either of these
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/// pointers.
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void setInlineAsmDiagnosticHandler(InlineAsmDiagHandlerTy DiagHandler,
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void *DiagContext = 0);
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/// getInlineAsmDiagnosticHandler - Return the diagnostic handler set by
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/// setInlineAsmDiagnosticHandler.
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InlineAsmDiagHandlerTy getInlineAsmDiagnosticHandler() const;
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/// getInlineAsmDiagnosticContext - Return the diagnostic context set by
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/// setInlineAsmDiagnosticHandler.
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void *getInlineAsmDiagnosticContext() const;
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/// emitError - Emit an error message to the currently installed error handler
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/// with optional location information. This function returns, so code should
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/// be prepared to drop the erroneous construct on the floor and "not crash".
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/// The generated code need not be correct. The error message will be
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/// implicitly prefixed with "error: " and should not end with a ".".
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void emitError(unsigned LocCookie, const Twine &ErrorStr);
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void emitError(const Instruction *I, const Twine &ErrorStr);
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void emitError(const Twine &ErrorStr);
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private:
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// DO NOT IMPLEMENT
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LLVMContext(LLVMContext&);
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void operator=(LLVMContext&);
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/// addModule - Register a module as being instantiated in this context. If
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/// the context is deleted, the module will be deleted as well.
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void addModule(Module*);
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/// removeModule - Unregister a module from this context.
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void removeModule(Module*);
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// Module needs access to the add/removeModule methods.
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friend class Module;
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};
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/// getGlobalContext - Returns a global context. This is for LLVM clients that
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/// only care about operating on a single thread.
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extern LLVMContext &getGlobalContext();
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}
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#endif
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