Initial commit.

2011-06-21 06:23:29 -07:00
commit 18af5226ba
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--- a/module.h
+++ b/module.h
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+/*
+  Copyright (c) 2010-2011, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are
+  met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+    * Neither the name of Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+*/
+
+/** @file module.h
+    @brief Declaration of the Module class, which is the ispc-side representation
+    of the results of compiling a source file.
+ */
+
+#ifndef ISPC_MODULE_H
+#define ISPC_MODULE_H 1
+
+#include "ispc.h"
+
+class Module {
+public:
+    /** The name of the source file being compiled should be passed as the
+        module name. */
+    Module(const char *filename);
+
+    /** Compiles the source file passed to the Module constructor, adding
+        its global variables and functions to both the llvm::Module and
+        SymbolTable.  Returns the number of errors during compilation.  */
+    int CompileFile();
+
+    /** Adds the global variable described by the declaration information to
+        the module. */
+    void AddGlobal(DeclSpecs *ds, Declarator *decl);
+
+    /** Adds the function described by the declaration information and the
+        provided statements to the module. */
+    void AddFunction(DeclSpecs *ds, Declarator *decl, Stmt *code);
+
+    /** After a source file has been compiled, output can be generated in a
+        number of different formats. */
+    enum OutputType { Asm,      /** Generate text assembly language output */
+                      Bitcode,  /** Generate LLVM IR bitcode output */
+                      Object,   /** Generate a native object file */
+                      Header    /** Generate a C/C++ header file with 
+                                    declarations of 'export'ed functions, global
+                                    variables, and the types used by them. */
+    };
+
+    /** Write the corresponding output type to the given file.  Returns
+        true on success, false if there has been an error.  The given
+        filename may be NULL, indicating that output should go to standard
+        output. */
+    bool WriteOutput(OutputType ot, const char *filename);
+
+    /** Total number of errors encountered during compilation. */
+    int errorCount;
+
+    /** Symbol table to hold symbols visible in the current scope during
+        compilation. */
+    SymbolTable *symbolTable;
+
+    /** llvm Module object into which globals and functions are added. */
+    llvm::Module *module; 
+
+#ifndef LLVM_2_8
+    /** The diBuilder manages generating debugging information (only
+        supported in LLVM 2.9 and beyond...) */
+    llvm::DIBuilder *diBuilder;
+#endif
+
+    GatherBuffer *gatherBuffer;
+
+private:
+    const char *filename;
+
+    /** This member records the global variables that have been defined
+        with 'extern' linkage, so that it's easy to include their
+        declarations in generated header files.
+
+        @todo FIXME: it would be nice to eliminate this and then query the
+        symbol table or the llvm Module for them when/if we need them.
+     */
+    std::vector<Symbol *> externGlobals;
+
+    bool writeHeader(const char *filename);
+    bool writeObjectFileOrAssembly(OutputType outputType, const char *filename);
+};
+
+#endif // ISPC_MODULE_H