Implement codegen for builtin infinity functions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44604 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/CodeGen/CGBuiltin.cpp b/CodeGen/CGBuiltin.cpp
index 27c82e8cd03cb81702e25441ae726bbf9018c1f6..8f9b7b3d74b65a572f70732b51d51ab920c90d69 100644 (file)
--- a/CodeGen/CGBuiltin.cpp
+++ b/CodeGen/CGBuiltin.cpp
@@ -112,6 +112,22 @@ RValue CodeGenFunction::EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E) {
       
     return RValue::get(V);      
   }
+  case Builtin::BI__builtin_inff: {
+    llvm::APFloat f(llvm::APFloat::IEEEsingle,
+                    llvm::APFloat::fcInfinity, false);
+    
+    llvm::Value *V = llvm::ConstantFP::get(llvm::Type::FloatTy, f);
+    return RValue::get(V);
+  }
+  case Builtin::BI__builtin_inf:
+  // FIXME: mapping long double onto double.      
+  case Builtin::BI__builtin_infl: {
+    llvm::APFloat f(llvm::APFloat::IEEEdouble,
+                    llvm::APFloat::fcInfinity, false);
+    
+    llvm::Value *V = llvm::ConstantFP::get(llvm::Type::DoubleTy, f);
+    return RValue::get(V);
+  }
   }
   
   return RValue::get(0);

diff --git a/include/clang/AST/Builtins.def b/include/clang/AST/Builtins.def
index d95dbd4301e047ce042bb54d293a510ab341d06b..c0e978fcd1f365d774fedb61b7baf5f6ba78e7f8 100644 (file)
--- a/include/clang/AST/Builtins.def
+++ b/include/clang/AST/Builtins.def
@@ -54,9 +54,9 @@
 //  F -> this is a libc/libm function with a '__builtin_' prefix added.
 
 // Standard libc/libm functions:
-BUILTIN(__builtin_inf  , "d"   , "ncF")
-BUILTIN(__builtin_inff , "f"   , "ncF")
-BUILTIN(__builtin_infl , "Ld"  , "ncF")
+BUILTIN(__builtin_inf  , "d"   , "nc")
+BUILTIN(__builtin_inff , "f"   , "nc")
+BUILTIN(__builtin_infl , "Ld"  , "nc")
 BUILTIN(__builtin_abs  , "ii"  , "ncF")
 BUILTIN(__builtin_fabs , "dd"  , "ncF")
 BUILTIN(__builtin_fabsf, "ff"  , "ncF")