From 32e66b72648f066ac2c4aeda10ed0dcf36ac88ff Mon Sep 17 00:00:00 2001 From: Craig Topper Date: Thu, 20 Dec 2018 01:32:06 +0000 Subject: [PATCH] [X86] Disable custom widening of signed/unsigned add/sub saturation intrinsics under -x86-experimental-vector-widening-legalization. Generic legalization should take care of this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@349714 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86ISelLowering.cpp | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index e381d0cace0..10d96131c81 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -837,13 +837,16 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM, setOperationAction(ISD::SADDSAT, MVT::v8i16, Legal); setOperationAction(ISD::USUBSAT, MVT::v8i16, Legal); setOperationAction(ISD::SSUBSAT, MVT::v8i16, Legal); - // Use widening instead of promotion. - for (auto VT : { MVT::v8i8, MVT::v4i8, MVT::v2i8, - MVT::v4i16, MVT::v2i16 }) { - setOperationAction(ISD::UADDSAT, VT, Custom); - setOperationAction(ISD::SADDSAT, VT, Custom); - setOperationAction(ISD::USUBSAT, VT, Custom); - setOperationAction(ISD::SSUBSAT, VT, Custom); + + if (!ExperimentalVectorWideningLegalization) { + // Use widening instead of promotion. + for (auto VT : { MVT::v8i8, MVT::v4i8, MVT::v2i8, + MVT::v4i16, MVT::v2i16 }) { + setOperationAction(ISD::UADDSAT, VT, Custom); + setOperationAction(ISD::SADDSAT, VT, Custom); + setOperationAction(ISD::USUBSAT, VT, Custom); + setOperationAction(ISD::SSUBSAT, VT, Custom); + } } setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom); -- 2.50.1