[AVX-512] Split scalar version of X86ISD::SELECT into a separate opcode because isel is not robust with multiple type profiles for the same opcode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282340 91177308-0d34-0410-b5e6-96231b3b80d8

Author: topperc

lib/Target/X86/X86ISelLowering.cpp

@@ -15995,7 +15995,8 @@ SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
       if (Subtarget.hasAVX512()) {
         SDValue Cmp = DAG.getNode(X86ISD::FSETCCM, DL, MVT::i1, CondOp0,
                                   CondOp1, DAG.getConstant(SSECC, DL, MVT::i8));
-        return DAG.getNode(X86ISD::SELECT, DL, VT, Cmp, Op1, Op2);
+        return DAG.getNode(VT.isVector() ? X86ISD::SELECT : X86ISD::SELECTS,
+                           DL, VT, Cmp, Op1, Op2);
       }
 
       SDValue Cmp = DAG.getNode(X86ISD::FSETCC, DL, VT, CondOp0, CondOp1,
@@ -17529,7 +17530,7 @@ static SDValue getScalarMaskingNode(SDValue Op, SDValue Mask,
 
   if (PreservedSrc.isUndef())
     PreservedSrc = getZeroVector(VT, Subtarget, DAG, dl);
-  return DAG.getNode(X86ISD::SELECT, dl, VT, IMask, Op, PreservedSrc);
+  return DAG.getNode(X86ISD::SELECTS, dl, VT, IMask, Op, PreservedSrc);
 }
 
 static int getSEHRegistrationNodeSize(const Function *Fn) {
@@ -22626,6 +22627,7 @@ const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
   case X86ISD::COMPRESS:           return "X86ISD::COMPRESS";
   case X86ISD::EXPAND:             return "X86ISD::EXPAND";
   case X86ISD::SELECT:             return "X86ISD::SELECT";
+  case X86ISD::SELECTS:            return "X86ISD::SELECTS";
   case X86ISD::ADDSUB:             return "X86ISD::ADDSUB";
   case X86ISD::RCP28:              return "X86ISD::RCP28";
   case X86ISD::RCP28S:             return "X86ISD::RCP28S";

lib/Target/X86/X86ISelLowering.h

@@ -95,7 +95,7 @@ namespace llvm {
       SETCC,
 
       /// X86 Select
-      SELECT,
+      SELECT, SELECTS,
 
       // Same as SETCC except it's materialized with a sbb and the value is all
       // one's or all zero's.

lib/Target/X86/X86InstrFragmentsSIMD.td

@@ -272,7 +272,7 @@ def X86select  : SDNode<"X86ISD::SELECT",
                                              SDTCisSameAs<2, 3>,
                                              SDTCisSameNumEltsAs<0, 1>]>>;
 
-def X86selects : SDNode<"X86ISD::SELECT",
+def X86selects : SDNode<"X86ISD::SELECTS",
                         SDTypeProfile<1, 3, [SDTCisVT<1, i1>,
                                              SDTCisSameAs<0, 2>,
                                              SDTCisSameAs<2, 3>]>>;