[llvm] r362895 - [X86] Remove (store (f32 (extractelt (v4f32))) isel patterns which is redundant.

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sat Jun  8 20:21:33 2019
New Revision: 362895

URL: http://llvm.org/viewvc/llvm-project?rev=362895&view=rev
Log:
[X86] Remove (store (f32 (extractelt (v4f32))) isel patterns which is redundant.

We emit a MOVSSmr and a COPY_TO_REGCLASS, but that's what we would get from
selecting the store and extractelt independently.

Modified:
    llvm/trunk/lib/Target/X86/X86InstrAVX512.td
    llvm/trunk/lib/Target/X86/X86InstrSSE.td

Modified: llvm/trunk/lib/Target/X86/X86InstrAVX512.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrAVX512.td?rev=362895&r1=362894&r2=362895&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86InstrAVX512.td (original)
+++ llvm/trunk/lib/Target/X86/X86InstrAVX512.td Sat Jun  8 20:21:33 2019
@@ -4409,11 +4409,6 @@ let Predicates = [HasAVX512] in {
   def : Pat<(v4i64 (X86vzmovl (insert_subvector undef,
                    (v2i64 (scalar_to_vector (loadi64 addr:$src))), (iPTR 0)))),
             (SUBREG_TO_REG (i64 0), (v2i64 (VMOVQI2PQIZrm addr:$src)), sub_xmm)>;
-
-  // Extract and store.
-  def : Pat<(store (f32 (extractelt (v4f32 VR128X:$src), (iPTR 0))),
-                   addr:$dst),
-            (VMOVSSZmr addr:$dst, (COPY_TO_REGCLASS (v4f32 VR128X:$src), FR32X))>;
 }
 
 let ExeDomain = SSEPackedInt, SchedRW = [SchedWriteVecLogic.XMM] in {

Modified: llvm/trunk/lib/Target/X86/X86InstrSSE.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrSSE.td?rev=362895&r1=362894&r2=362895&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86InstrSSE.td (original)
+++ llvm/trunk/lib/Target/X86/X86InstrSSE.td Sat Jun  8 20:21:33 2019
@@ -281,11 +281,6 @@ let Predicates = [UseAVX] in {
             (SUBREG_TO_REG (i32 0), (VMOVSDrm addr:$src), sub_xmm)>;
   def : Pat<(v4f64 (X86vzload addr:$src)),
             (SUBREG_TO_REG (i32 0), (VMOVSDrm addr:$src), sub_xmm)>;
-
-  // Extract and store.
-  def : Pat<(store (f32 (extractelt (v4f32 VR128:$src), (iPTR 0))),
-                   addr:$dst),
-            (VMOVSSmr addr:$dst, (COPY_TO_REGCLASS (v4f32 VR128:$src), FR32))>;
 }
 
 let Predicates = [UseAVX, OptForSize] in {
@@ -335,11 +330,6 @@ let Predicates = [UseSSE1] in {
             (COPY_TO_REGCLASS (MOVSSrm addr:$src), VR128)>;
   def : Pat<(v4f32 (X86vzload addr:$src)),
             (COPY_TO_REGCLASS (MOVSSrm addr:$src), VR128)>;
-
-  // Extract and store.
-  def : Pat<(store (f32 (extractelt (v4f32 VR128:$src), (iPTR 0))),
-                   addr:$dst),
-            (MOVSSmr addr:$dst, (COPY_TO_REGCLASS VR128:$src, FR32))>;
 }
 
 let Predicates = [UseSSE2] in {