[llvm] r291369 - [AVX-512] Remove patterns from masked broadcast versions of BLENDM instructions.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sat Jan  7 16:20:26 2017
New Revision: 291369

URL: http://llvm.org/viewvc/llvm-project?rev=291369&view=rev
Log:
[AVX-512] Remove patterns from masked broadcast versions of BLENDM instructions.

All but (v2f64 broadcast f64) are handled with VBROADCAST instructions. The v2f64 version can be handled with VMOVDDUP.

We may want to consider converting to BLENDM instructions in the two address instruction pass if its beneficial to register allocation.

Modified:
    llvm/trunk/lib/Target/X86/X86InstrAVX512.td

Modified: llvm/trunk/lib/Target/X86/X86InstrAVX512.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrAVX512.td?rev=291369&r1=291368&r2=291369&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86InstrAVX512.td (original)
+++ llvm/trunk/lib/Target/X86/X86InstrAVX512.td Sat Jan  7 16:20:26 2017
@@ -1529,24 +1529,21 @@ multiclass avx512_blendmask<bits<8> opc,
 }
 multiclass avx512_blendmask_rmb<bits<8> opc, string OpcodeStr, X86VectorVTInfo _> {
 
+  let mayLoad = 1, hasSideEffects = 0 in {
   def rmbk : AVX5128I<opc, MRMSrcMem, (outs _.RC:$dst),
       (ins _.KRCWM:$mask, _.RC:$src1, _.ScalarMemOp:$src2),
        !strconcat(OpcodeStr,
             "\t{${src2}", _.BroadcastStr, ", $src1, $dst {${mask}}|",
             "$dst {${mask}}, $src1, ${src2}", _.BroadcastStr, "}"),
-      [(set _.RC:$dst,(vselect _.KRCWM:$mask,
-                        (X86VBroadcast (_.ScalarLdFrag addr:$src2)),
-                        (_.VT _.RC:$src1)))]>,
-      EVEX_4V, EVEX_K, EVEX_B, EVEX_CD8<_.EltSize, CD8VF>;
+      []>, EVEX_4V, EVEX_K, EVEX_B, EVEX_CD8<_.EltSize, CD8VF>;
 
-  let mayLoad = 1, hasSideEffects = 0 in
   def rmb : AVX5128I<opc, MRMSrcMem, (outs _.RC:$dst),
       (ins _.RC:$src1, _.ScalarMemOp:$src2),
        !strconcat(OpcodeStr,
             "\t{${src2}", _.BroadcastStr, ", $src1, $dst|",
             "$dst, $src1, ${src2}", _.BroadcastStr, "}"),
       []>,  EVEX_4V, EVEX_B, EVEX_CD8<_.EltSize, CD8VF>;
-
+  }
 }
 
 multiclass blendmask_dq <bits<8> opc, string OpcodeStr,