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Revert the current implementation and C API. New implementation and C APIs are in the works. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208904 91177308-0d34-0410-b5e6-96231b3b80d8
174 lines
6.7 KiB
C++
174 lines
6.7 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_IR_LLVMCONTEXT_H
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#define LLVM_IR_LLVMCONTEXT_H
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#include "llvm-c/Core.h"
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#include "llvm/Support/CBindingWrapping.h"
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#include "llvm/Support/Compiler.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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class DiagnosticInfo;
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template <typename T> class SmallVectorImpl;
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class Function;
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class DebugLoc;
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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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MD_tbaa_struct = 5, // "tbaa.struct"
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MD_invariant_load = 6 // "invariant.load"
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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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/// Defines the type of a diagnostic handler.
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/// \see LLVMContext::setDiagnosticHandler.
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/// \see LLVMContext::diagnose.
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typedef void (*DiagnosticHandlerTy)(const DiagnosticInfo &DI, void *Context);
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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 = nullptr);
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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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/// setDiagnosticHandler - This method sets a handler that is invoked
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/// when the backend needs to report anything to the user. 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 setDiagnosticHandler(DiagnosticHandlerTy DiagHandler,
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void *DiagContext = nullptr);
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/// getDiagnosticHandler - Return the diagnostic handler set by
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/// setDiagnosticHandler.
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DiagnosticHandlerTy getDiagnosticHandler() const;
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/// getDiagnosticContext - Return the diagnostic context set by
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/// setDiagnosticContext.
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void *getDiagnosticContext() const;
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/// diagnose - Report a message to the currently installed diagnostic handler.
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/// This function returns, in particular in the case of error reporting
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/// (DI.Severity == RS_Error), so the caller should leave the compilation
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/// process in a self-consistent state, even though the generated code
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/// need not be correct.
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/// The diagnostic message will be implicitly prefixed with a severity
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/// keyword according to \p DI.getSeverity(), i.e., "error: "
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/// for RS_Error, "warning: " for RS_Warning, and "note: " for RS_Note.
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void diagnose(const DiagnosticInfo &DI);
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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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/// emitOptimizationRemark - Emit an optimization remark message. \p PassName
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/// is the name of the pass emitting the message. If -Rpass= is given
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/// and \p PassName matches the regular expression in -Rpass, then the
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/// remark will be emitted. \p Fn is the function triggering the remark,
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/// \p DLoc is the debug location where the diagnostic is generated.
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/// \p Msg is the message string to use.
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void emitOptimizationRemark(const char *PassName, const Function &Fn,
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const DebugLoc &DLoc, const Twine &Msg);
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private:
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LLVMContext(LLVMContext&) LLVM_DELETED_FUNCTION;
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void operator=(LLVMContext&) LLVM_DELETED_FUNCTION;
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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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// Create wrappers for C Binding types (see CBindingWrapping.h).
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DEFINE_SIMPLE_CONVERSION_FUNCTIONS(LLVMContext, LLVMContextRef)
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/* Specialized opaque context conversions.
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*/
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inline LLVMContext **unwrap(LLVMContextRef* Tys) {
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return reinterpret_cast<LLVMContext**>(Tys);
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}
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inline LLVMContextRef *wrap(const LLVMContext **Tys) {
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return reinterpret_cast<LLVMContextRef*>(const_cast<LLVMContext**>(Tys));
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}
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}
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#endif
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