From: Anders Carlsson <andersca@mac.com>
Date: Sat, 14 Nov 2009 21:21:42 +0000 (+0000)
Subject: Handle CK_BitCast in EmitCastLValue.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=658e8123a80d0e62f227a0c1532f2a4f106b3e73;p=clang

Handle CK_BitCast in EmitCastLValue.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88810 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index c297903a69..c446c03689 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -1302,7 +1302,7 @@ LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) {
       if (ICE->isLvalueCast())
         return EmitLValue(E->getSubExpr());
     
-    assert(0 && "Unhandled cast!");
+    assert(false && "Unhandled cast!");
       
   case CastExpr::CK_NoOp:
   case CastExpr::CK_ConstructorConversion:
@@ -1327,13 +1327,22 @@ LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) {
     
     return LValue::MakeAddr(Base, MakeQualifiers(E->getType()));
   }
-
   case CastExpr::CK_ToUnion: {
     llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType()));
     EmitAnyExpr(E->getSubExpr(), Temp, false);
 
     return LValue::MakeAddr(Temp, MakeQualifiers(E->getType()));
-    }
+  }
+  case CastExpr::CK_BitCast: {
+    // This must be a reinterpret_cast.
+    const CXXReinterpretCastExpr *CE = cast<CXXReinterpretCastExpr>(E);
+    
+    LValue LV = EmitLValue(E->getSubExpr());
+    llvm::Value *V = Builder.CreateBitCast(LV.getAddress(),
+                                           ConvertType(CE->getTypeAsWritten()));
+    return LValue::MakeAddr(V, MakeQualifiers(E->getType()));
+  }
+
   }
 }
 
diff --git a/test/CodeGenCXX/reinterpret-cast.cpp b/test/CodeGenCXX/reinterpret-cast.cpp
index 25be9b9948..58a980d528 100644
--- a/test/CodeGenCXX/reinterpret-cast.cpp
+++ b/test/CodeGenCXX/reinterpret-cast.cpp
@@ -10,3 +10,8 @@ unsigned long f2() {
 unsigned long f3(void *p) {
   return reinterpret_cast<unsigned long>(p);
 }
+
+void f4(int*&);
+void f5(void*& u) {
+  f4(reinterpret_cast<int*&>(u));
+}
\ No newline at end of file