Added separate alias instructions for SSE logical ops that operate on non-packed...

[oota-llvm.git] / lib / System / DynamicLibrary.cpp

diff --git a/lib/System/DynamicLibrary.cpp b/lib/System/DynamicLibrary.cpp
index 231cdac19c6bffb3da5b3e4c7ded68dc92218ff8..0c179fc2f7eb4045e21f9526afd089191102d5fe 100644 (file)
--- a/lib/System/DynamicLibrary.cpp
+++ b/lib/System/DynamicLibrary.cpp
@@ -1,10 +1,10 @@
 //===-- DynamicLibrary.cpp - Runtime link/load libraries --------*- C++ -*-===//
-// 
+//
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Reid Spencer and is distributed under the 
+// This file was developed by Reid Spencer and is distributed under the
 // University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
+//
 //===----------------------------------------------------------------------===//
 //
 //  This header file implements the operating system DynamicLibrary concept.
@@ -13,6 +13,14 @@
 
 #include "llvm/System/DynamicLibrary.h"
 #include "llvm/Config/config.h"
+#include <map>
+
+// Collection of symbol name/value pairs to be searched prior to any libraries.
+static std::map<std::string, void *> g_symbols;
+
+void llvm::sys::DynamicLibrary::AddSymbol(const char* symbolName, void *symbolValue) {
+  g_symbols[symbolName] = symbolValue;
+}
 
 // It is not possible to use ltdl.c on VC++ builds as the terms of its LGPL
 // license and special exception would cause all of LLVM to be placed under
@@ -33,7 +41,7 @@ using namespace llvm::sys;
 
 //===----------------------------------------------------------------------===//
 //=== WARNING: Implementation here must contain only TRULY operating system
-//===          independent code. 
+//===          independent code.
 //===----------------------------------------------------------------------===//
 
 static bool did_initialize_ltdl = false;
@@ -55,7 +63,7 @@ DynamicLibrary::DynamicLibrary() : handle(0) {
 
   if (a_handle == 0)
     throw std::string("Can't open program as dynamic library");
-  
+
   handle = a_handle;
   OpenedHandles.push_back(a_handle);
 }
@@ -107,6 +115,13 @@ void DynamicLibrary::LoadLibraryPermanently(const char* filename) {
 
 void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
   check_ltdl_initialization();
+
+  // First check symbols added via AddSymbol().
+  std::map<std::string, void *>::iterator I = g_symbols.find(symbolName);
+  if (I != g_symbols.end())
+    return I->second;
+
+  // Now search the libraries.
   for (std::vector<lt_dlhandle>::iterator I = OpenedHandles.begin(),
        E = OpenedHandles.end(); I != E; ++I) {
     lt_ptr ptr = lt_dlsym(*I, symbolName);