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ebbc4df924
isn't a good level of abstraction for memdep. Instead, generalize AliasAnalysis::alias and related interfaces with a new Location class for describing a memory location. For now, this is the same Pointer and Size as before, plus an additional field for a TBAA tag. Also, introduce a fixed MD_tbaa metadata tag kind. llvm-svn: 113858
102 lines
3.7 KiB
C++
102 lines
3.7 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 Instruction;
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class Module;
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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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};
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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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/// 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 (of type SourceMgr::DiagHandlerTy) and the
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/// second is a context pointer that gets passed into the DiagHandler.
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///
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/// LLVMContext doesn't take ownership or interpreter either of these
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/// pointers.
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void setInlineAsmDiagnosticHandler(void *DiagHandler, void *DiagContext = 0);
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/// getInlineAsmDiagnosticHandler - Return the diagnostic handler set by
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/// setInlineAsmDiagnosticHandler.
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void *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, StringRef ErrorStr);
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void emitError(const Instruction *I, StringRef ErrorStr);
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void emitError(StringRef 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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