From: Ahmed Bougacha <ahmed.bougacha@gmail.com>
Date: Thu, 4 Dec 2014 23:52:15 +0000 (+0000)
Subject: [X86] Delete dead code in fcopysign lowering. NFC.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3d5af84aa6015d6dc1bad9877a542501bbb82d75;p=oota-llvm.git

[X86] Delete dead code in fcopysign lowering. NFC.

r32900 introduced custom lowering for fcopysign, with two checks to
change the magnitude value's type if it's larger/smaller than the sign
value's type.  r32932 replaced that code for the smaller case.
r43205 did the same for the larger case, but left the old code, now dead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223415 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 7976d33397e..9409626124d 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -14477,17 +14477,6 @@ static SDValue LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) {
                               false, false, false, 16);
   SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
 
-  // Shift sign bit right or left if the two operands have different types.
-  if (SrcVT.bitsGT(VT)) {
-    // Op0 is MVT::f32, Op1 is MVT::f64.
-    SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
-    SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
-                          DAG.getConstant(32, MVT::i32));
-    SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
-    SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
-                          DAG.getIntPtrConstant(0));
-  }
-
   // Clear first operand sign bit.
   CV.clear();
   if (VT == MVT::f64) {