[llvm] r317059 - [X86] Add AVX512 support to X86FastISel::fastMaterializeFloatZero.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Tue Oct 31 17:47:45 2017
New Revision: 317059

URL: http://llvm.org/viewvc/llvm-project?rev=317059&view=rev
Log:
[X86] Add AVX512 support to X86FastISel::fastMaterializeFloatZero.

Modified:
    llvm/trunk/lib/Target/X86/X86FastISel.cpp

Modified: llvm/trunk/lib/Target/X86/X86FastISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FastISel.cpp?rev=317059&r1=317058&r2=317059&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FastISel.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86FastISel.cpp Tue Oct 31 17:47:45 2017
@@ -3876,14 +3876,15 @@ unsigned X86FastISel::fastMaterializeFlo
     return 0;
 
   // Get opcode and regclass for the given zero.
+  bool HasAVX512 = Subtarget->hasAVX512();
   unsigned Opc = 0;
   const TargetRegisterClass *RC = nullptr;
   switch (VT.SimpleTy) {
   default: return 0;
   case MVT::f32:
     if (X86ScalarSSEf32) {
-      Opc = X86::FsFLD0SS;
-      RC  = &X86::FR32RegClass;
+      Opc = HasAVX512 ? X86::AVX512_FsFLD0SS : X86::FsFLD0SS;
+      RC  = HasAVX512 ? &X86::FR32XRegClass : &X86::FR32RegClass;
     } else {
       Opc = X86::LD_Fp032;
       RC  = &X86::RFP32RegClass;
@@ -3891,8 +3892,8 @@ unsigned X86FastISel::fastMaterializeFlo
     break;
   case MVT::f64:
     if (X86ScalarSSEf64) {
-      Opc = X86::FsFLD0SD;
-      RC  = &X86::FR64RegClass;
+      Opc = HasAVX512 ? X86::AVX512_FsFLD0SD : X86::FsFLD0SD;
+      RC  = HasAVX512 ? &X86::FR64XRegClass : &X86::FR64RegClass;
     } else {
       Opc = X86::LD_Fp064;
       RC  = &X86::RFP64RegClass;