From: Haochen Jiang <haochen.jiang@intel.com>
Date: Thu, 11 Jan 2024 08:22:38 +0000 (+0800)
Subject: i386: Remove redundant move in vnni pattern
X-Git-Tag: basepoints/gcc-15~2970
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=72b3495dfdddc27753f66eb77fff647d619f75f0;p=thirdparty%2Fgcc.git

i386: Remove redundant move in vnni pattern

gcc/ChangeLog:

	* config/i386/sse.md (sdot_prod<mode>): Remove redundant SET.
	(usdot_prod<mode>): Ditto.
	(sdot_prod<mode>): Ditto.
	(udot_prod<mode>): Ditto.
---

diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 532738dcf946..acd10908d762 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -16174,7 +16174,6 @@
       operands[2] = lowpart_subreg (<sseunpackmode>mode,
 				    force_reg (<MODE>mode, operands[2]),
 				    <MODE>mode);
-      emit_insn (gen_rtx_SET (operands[0], operands[3]));
       emit_insn (gen_vpdpwssd_<SDOT_VPDP_SUF> (operands[0], operands[3],
 					       operands[1], operands[2]));
     }
@@ -29963,7 +29962,6 @@
   operands[2] = lowpart_subreg (<ssedvecmode>mode,
 				force_reg (<MODE>mode, operands[2]),
 				<MODE>mode);
-  emit_insn (gen_rtx_SET (operands[0], operands[3]));
   emit_insn (gen_vpdpbusd_<ssedvecmodelower> (operands[0], operands[3],
 				  operands[1], operands[2]));
   DONE;
@@ -30780,7 +30778,6 @@
       operands[2] = lowpart_subreg (<ssedvecmode>mode,
 				    force_reg (<MODE>mode, operands[2]),
 				    <MODE>mode);
-      emit_insn (gen_rtx_SET (operands[0], operands[3]));
       emit_insn (gen_vpdpbssd_<ssedvecmodelower> (operands[0], operands[3],
 						  operands[1], operands[2]));
     }
@@ -30857,7 +30854,6 @@
       operands[2] = lowpart_subreg (<ssedvecmode>mode,
 				    force_reg (<MODE>mode, operands[2]),
 				    <MODE>mode);
-      emit_insn (gen_rtx_SET (operands[0], operands[3]));
       emit_insn (gen_vpdpbuud_<ssedvecmodelower> (operands[0], operands[3],
 						  operands[1], operands[2]));
    }