commit eca5749185e4cfa2ab6f37a96ec03ac753b467b8
author Eli Friedman <eli.friedman@gmail.com> Tue Sep 01 04:19:44 2009 +0000
committer Eli Friedman <eli.friedman@gmail.com> Tue Sep 01 04:19:44 2009 +0000
tree c10eb3622ee80ba156dfa7203372ca77ae636c6c
parent d33e328e84080d75879182f882b578ffa7db52ab

PR4836, part 2: CodeGen for __builtin_isnan.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80655 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGBuiltin.cpp

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 9ba5f71..bfb6be8 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -271,6 +271,11 @@
     return RValue::get(Builder.CreateZExt(LHS, ConvertType(E->getType()),
                                           "tmp"));
   }
+  case Builtin::BI__builtin_isnan: {
+    Value *V = EmitScalarExpr(E->getArg(0));
+    V = Builder.CreateFCmpUNO(V, V, "cmp");
+    return RValue::get(Builder.CreateZExt(V, ConvertType(E->getType()), "tmp"));
+  }
   case Builtin::BIalloca:
   case Builtin::BI__builtin_alloca: {
     // FIXME: LLVM IR Should allow alloca with an i64 size!