[cfe-commits] r46811 - /cfe/trunk/CodeGen/CGBuiltin.cpp

[Anders Carlsson]

Author: andersca
Date: Wed Feb  6 01:19:27 2008
New Revision: 46811

URL: http://llvm.org/viewvc/llvm-project?rev=46811&view=rev
Log:
Generate code for the various __builtin_ctz functions.

Modified:
    cfe/trunk/CodeGen/CGBuiltin.cpp

Modified: cfe/trunk/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/CodeGen/CGBuiltin.cpp?rev=46811&r1=46810&r2=46811&view=diff

==============================================================================
--- cfe/trunk/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/CodeGen/CGBuiltin.cpp Wed Feb  6 01:19:27 2008
@@ -149,6 +149,20 @@
     
     return RValue::get(Result);
   }
+  case Builtin::BI__builtin_ctz:
+  case Builtin::BI__builtin_ctzl:
+  case Builtin::BI__builtin_ctzll: {
+    Value *ArgValue = EmitScalarExpr(E->getArg(0));
+    
+    const llvm::Type *ArgType = ArgValue->getType();
+    Value *F = CGM.getIntrinsic(Intrinsic::cttz, &ArgType, 1);
+
+    const llvm::Type *ResultType = ConvertType(E->getType());    
+    Value *Result = Builder.CreateCall(F, ArgValue, "tmp");
+    if (Result->getType() != ResultType)
+      Result = Builder.CreateIntCast(Result, ResultType, "cast");
+    return RValue::get(Result);
+  }
   case Builtin::BI__builtin_expect:
     return RValue::get(EmitScalarExpr(E->getArg(0)));
   case Builtin::BI__builtin_bswap32: