[cfe-commits] r44254 - in /cfe/trunk: CodeGen/CGBuiltin.cpp include/clang/AST/Builtins.def

[Anders Carlsson]

Author: andersca
Date: Tue Nov 20 13:05:17 2007
New Revision: 44254

URL: http://llvm.org/viewvc/llvm-project?rev=44254&view=rev
Log:
Add __builtin_abs

Modified:
    cfe/trunk/CodeGen/CGBuiltin.cpp
    cfe/trunk/include/clang/AST/Builtins.def

Modified: cfe/trunk/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/CodeGen/CGBuiltin.cpp?rev=44254&r1=44253&r2=44254&view=diff

==============================================================================
--- cfe/trunk/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/CodeGen/CGBuiltin.cpp Tue Nov 20 13:05:17 2007
@@ -85,6 +85,18 @@
     
     return RValue::get(llvm::ConstantInt::get(Result));
   }
+  case Builtin::BI__builtin_abs: {
+    llvm::Value *ArgValue = EmitScalarExpr(E->getArg(0));   
+    
+    llvm::BinaryOperator *NegOp = 
+      Builder.CreateNeg(ArgValue, (ArgValue->getName() + "neg").c_str());
+    llvm::Value *CmpResult = 
+      Builder.CreateICmpSGE(ArgValue, NegOp->getOperand(0), "abscond");
+    llvm::Value *Result = 
+      Builder.CreateSelect(CmpResult, ArgValue, NegOp, "abs");
+    
+    return RValue::get(Result);
+  }
   }
   
   return RValue::get(0);

Modified: cfe/trunk/include/clang/AST/Builtins.def
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/Builtins.def?rev=44254&r1=44253&r2=44254&view=diff

==============================================================================
--- cfe/trunk/include/clang/AST/Builtins.def (original)
+++ cfe/trunk/include/clang/AST/Builtins.def Tue Nov 20 13:05:17 2007
@@ -55,6 +55,7 @@
 BUILTIN(__builtin_inf  , "d"   , "ncF")
 BUILTIN(__builtin_inff , "f"   , "ncF")
 BUILTIN(__builtin_infl , "Ld"  , "ncF")
+BUILTIN(__builtin_abs  , "ii"  , "ncF")
 BUILTIN(__builtin_fabs , "dd"  , "ncF")
 BUILTIN(__builtin_fabsf, "ff"  , "ncF")
 BUILTIN(__builtin_fabsl, "LdLd", "ncF")