[clang] Handle lround/llround builtins
As for other floating-point rounding builtins that can be optimized
when build with -fno-math-errno, this patch adds support for lround
and llround. It currently only optimize for AArch64 backend.
Reviewed By: efriedma
Differential Revision: https://reviews.llvm.org/D61392
llvm-svn: 360896
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index 0481032..8e70720 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -1721,6 +1721,27 @@
case Builtin::BI__builtin_truncl:
return RValue::get(emitUnaryBuiltin(*this, E, Intrinsic::trunc));
+ case Builtin::BIlround:
+ case Builtin::BIlroundf:
+ case Builtin::BIlroundl:
+ case Builtin::BI__builtin_lround:
+ case Builtin::BI__builtin_lroundf:
+ case Builtin::BI__builtin_lroundl: {
+ llvm::Type *ResultType = ConvertType(E->getType());
+ int Width = ResultType->getPrimitiveSizeInBits();
+ return RValue::get(emitUnaryBuiltin(*this, E,
+ Width == 32 ? Intrinsic::lround_i32
+ : Intrinsic::lround_i64));
+ }
+
+ case Builtin::BIllround:
+ case Builtin::BIllroundf:
+ case Builtin::BIllroundl:
+ case Builtin::BI__builtin_llround:
+ case Builtin::BI__builtin_llroundf:
+ case Builtin::BI__builtin_llroundl:
+ return RValue::get(emitUnaryBuiltin(*this, E, Intrinsic::llround));
+
default:
break;
}