[clang] Handle lrint/llrint builtins

As for other floating-point rounding builtins that can be optimized
when build with -fno-math-errno, this patch adds support for lrint
and llrint.  It currently only optimize for AArch64 backend.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D62019

llvm-svn: 361878

1 files changed, 16 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index d59e0fc960b..bc798cab11e 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -1741,6 +1741,22 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
     case Builtin::BI__builtin_llroundl:
       return RValue::get(emitFPToIntRoundBuiltin(*this, E, Intrinsic::llround));
 
+    case Builtin::BIlrint:
+    case Builtin::BIlrintf:
+    case Builtin::BIlrintl:
+    case Builtin::BI__builtin_lrint:
+    case Builtin::BI__builtin_lrintf:
+    case Builtin::BI__builtin_lrintl:
+      return RValue::get(emitFPToIntRoundBuiltin(*this, E, Intrinsic::lrint));
+
+    case Builtin::BIllrint:
+    case Builtin::BIllrintf:
+    case Builtin::BIllrintl:
+    case Builtin::BI__builtin_llrint:
+    case Builtin::BI__builtin_llrintf:
+    case Builtin::BI__builtin_llrintl:
+      return RValue::get(emitFPToIntRoundBuiltin(*this, E, Intrinsic::llrint));
+
     default:
       break;
     }