[X86] Remove invalid code from LowerVSELECT.

This code attempted to say that v8i16/v16i16 VSELECT is legal if BWI and VLX are enabled, but the only way we could reach this point is if the condition was not a vXi1 type. Which means it really wasn't legal.

We don't have any tests that exercise this code. So I'm hoping it wasn't really reachable.

llvm-svn: 316851

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 0b36158..900c99b 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -14232,10 +14232,6 @@ SDValue X86TargetLowering::LowerVSELECT(SDValue Op, SelectionDAG &DAG) const {
 
   case MVT::v8i16:
   case MVT::v16i16:
-    // AVX-512 BWI and VLX features support VSELECT with i16 elements.
-    if (Subtarget.hasBWI() && Subtarget.hasVLX())
-      return Op;
-
     // FIXME: We should custom lower this by fixing the condition and using i8
     // blends.
     return SDValue();