From: Anders Carlsson <andersca@mac.com>
Date: Mon, 20 Aug 2007 18:05:56 +0000 (+0000)
Subject: Add support for code generation of builtins.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=022012e6e5626c3372e1a5493c0929dfc1fa9e47;p=clang

Add support for code generation of builtins.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41188 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/CodeGen/CGBuiltin.cpp b/CodeGen/CGBuiltin.cpp
new file mode 100644
index 0000000000..0095bdef48
--- /dev/null
+++ b/CodeGen/CGBuiltin.cpp
@@ -0,0 +1,30 @@
+//===---- CGBuiltin.cpp - Emit LLVM Code for builtins ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Anders Carlsson and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This contains code to emit Builtin calls as LLVM code.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CodeGenFunction.h"
+#include "CodeGenModule.h"
+#include "clang/AST/Builtins.h"
+#include "clang/AST/Expr.h"
+
+using namespace clang;
+using namespace CodeGen;
+
+RValue CodeGenFunction::EmitBuiltinExpr(unsigned builtinID, const CallExpr *E)
+{
+  switch (builtinID) {
+    default:
+      assert(0 && "Unknown builtin id");
+  }
+      
+  return RValue::get(0);
+}
diff --git a/CodeGen/CGExpr.cpp b/CodeGen/CGExpr.cpp
index b0d34a3380..317a554800 100644
--- a/CodeGen/CGExpr.cpp
+++ b/CodeGen/CGExpr.cpp
@@ -14,6 +14,7 @@
 #include "CodeGenFunction.h"
 #include "CodeGenModule.h"
 #include "clang/AST/AST.h"
+#include "clang/Lex/IdentifierTable.h"
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/Function.h"
@@ -660,6 +661,15 @@ RValue CodeGenFunction::EmitCastExpr(const Expr *Op, QualType DestTy) {
 }
 
 RValue CodeGenFunction::EmitCallExpr(const CallExpr *E) {
+  if (const ImplicitCastExpr *IcExpr = 
+      dyn_cast<const ImplicitCastExpr>(E->getCallee()))
+    if (const DeclRefExpr *DRExpr = 
+        dyn_cast<const DeclRefExpr>(IcExpr->getSubExpr()))
+      if (const FunctionDecl *FDecl = 
+          dyn_cast<const FunctionDecl>(DRExpr->getDecl()))
+        if (unsigned builtinID = FDecl->getIdentifier()->getBuiltinID())
+          return EmitBuiltinExpr(builtinID, E);
+        
   llvm::Value *Callee = EmitExpr(E->getCallee()).getVal();
   
   // The callee type will always be a pointer to function type, get the function
diff --git a/CodeGen/CodeGenFunction.h b/CodeGen/CodeGenFunction.h
index 314896a874..5f78a33738 100644
--- a/CodeGen/CodeGenFunction.h
+++ b/CodeGen/CodeGenFunction.h
@@ -352,6 +352,7 @@ public:
    
   RValue EmitCastExpr(const Expr *Op, QualType DestTy);
   RValue EmitCallExpr(const CallExpr *E);
+  RValue EmitBuiltinExpr(unsigned builtinID, const CallExpr *E);
   RValue EmitArraySubscriptExprRV(const ArraySubscriptExpr *E);
 
   // Unary Operators.