From 12f3285f9bcce0ea4f1197a68a3b738762678273 Mon Sep 17 00:00:00 2001
From: Lu Guanqun <guanqun.lu@intel.com>
Date: Thu, 15 Mar 2012 13:47:57 +0800
Subject: [PATCH] calls to C/C++ functions should not be mangled.

Otherwise, linker will never find the correct function.
---
 module.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/module.cpp b/module.cpp
index 7b7f2e5c..1539347e 100644
--- a/module.cpp
+++ b/module.cpp
@@ -501,10 +501,14 @@ Module::AddFunctionDeclaration(Symbol *funSym, bool isInline) {
     llvm::GlobalValue::LinkageTypes linkage = (funSym->storageClass == SC_STATIC ||
                                                isInline) ?
         llvm::GlobalValue::InternalLinkage : llvm::GlobalValue::ExternalLinkage;
-    std::string functionName = ((funSym->storageClass == SC_EXTERN_C) ?
-                                funSym->name : funSym->MangledName());
-    if (g->mangleFunctionsWithTarget)
-        functionName += g->target.GetISAString();
+    std::string functionName;
+    if (funSym->storageClass == SC_EXTERN_C)
+        functionName = funSym->name;
+    else {
+        functionName = funSym->MangledName();
+        if (g->mangleFunctionsWithTarget)
+            functionName += g->target.GetISAString();
+    }
     llvm::Function *function = 
         llvm::Function::Create(llvmFunctionType, linkage, functionName.c_str(), 
                                module);