i386.md (movstrict<mode>): Use register_operand predicate for operand 0.

	* config/i386/i386.md (movstrict<mode>): Use register_operand
	predicate for operand 0.  Add expander condition.  Assert that
	operand 0 is a SUBREG RTX.
	(*movstrict<mode>_1): Use register_operand predicate for operand 0.
	Update operand constraints and insn condition.
	(zero_extend<mode>si2_and): Do not call gen_movstrict<mode>.
	(zero_extendqihi2_and): Do not call gen_movstrictqi.
	(*setcc_qi_slp): Use register_operand predicate for operand 0.
	Update operand 0 constraints.
	(setcc_qi_slp splitters): Use register_operand predicate for operand 0.

From-SVN: r273891

gcc/ChangeLog

+2019-07-30  Uroš Bizjak  <ubizjak@gmail.com>
+
+	* config/i386/i386.md (movstrict<mode>): Use register_operand
+	predicate for operand 0.  Add expander condition.  Assert that
+	operand 0 is a SUBREG RTX.
+	(*movstrict<mode>_1): Use register_operand predicate for operand 0.
+	Update operand constraints and insn condition.
+	(zero_extend<mode>si2_and): Do not call gen_movstrict<mode>.
+	(zero_extendqihi2_and): Do not call gen_movstrictqi.
+	(*setcc_qi_slp): Use register_operand predicate for operand 0.
+	Update operand 0 constraints.
+	(setcc_qi_slp splitters): Use register_operand predicate for operand 0.
+
 2019-07-29  Jozef Lawrynowicz  <jozef.l@mittosystems.com>
 
 	* config/msp430/msp430.h (DRIVER_SELF_SPECS): Define and emit errors

gcc/config/i386/i386.md

@@ -2786,26 +2786,20 @@
    (set_attr "bdver1_decode" "double")])
 
 (define_expand "movstrict<mode>"
-  [(set (strict_low_part (match_operand:SWI12 0 "nonimmediate_operand"))
+  [(set (strict_low_part (match_operand:SWI12 0 "register_operand"))
 	(match_operand:SWI12 1 "general_operand"))]
-  ""
+  "!TARGET_PARTIAL_REG_STALL || optimize_function_for_size_p (cfun)"
 {
-  if (TARGET_PARTIAL_REG_STALL && optimize_function_for_speed_p (cfun))
+  gcc_assert (SUBREG_P (operands[0]));
+  if (GET_MODE_CLASS (GET_MODE (SUBREG_REG (operands[0]))) != MODE_INT)
     FAIL;
-  if (SUBREG_P (operands[0])
-      && GET_MODE_CLASS (GET_MODE (SUBREG_REG (operands[0]))) != MODE_INT)
-    FAIL;
-  /* Don't generate memory->memory moves, go through a register */
-  if (MEM_P (operands[0]) && MEM_P (operands[1]))
-    operands[1] = force_reg (<MODE>mode, operands[1]);
 })
 
 (define_insn "*movstrict<mode>_1"
   [(set (strict_low_part
-	  (match_operand:SWI12 0 "nonimmediate_operand" "+<r>m,<r>"))
-	(match_operand:SWI12 1 "general_operand" "<r>n,m"))]
-  "(!TARGET_PARTIAL_REG_STALL || optimize_function_for_size_p (cfun))
-   && !(MEM_P (operands[0]) && MEM_P (operands[1]))"
+	  (match_operand:SWI12 0 "register_operand" "+<r>"))
+	(match_operand:SWI12 1 "general_operand" "<r>mn"))]
+  "!TARGET_PARTIAL_REG_STALL || optimize_function_for_size_p (cfun)"
   "mov{<imodesuffix>}\t{%1, %0|%0, %1}"
   [(set_attr "type" "imov")
    (set_attr "mode" "<MODE>")])
@@ -4011,8 +4005,10 @@
       ix86_expand_clear (operands[0]);
 
       gcc_assert (!TARGET_PARTIAL_REG_STALL);
-      emit_insn (gen_movstrict<mode>
-		  (gen_lowpart (<MODE>mode, operands[0]), operands[1]));
+      emit_insn (gen_rtx_SET
+      		 (gen_rtx_STRICT_LOW_PART
+		  (VOIDmode, gen_lowpart (<MODE>mode, operands[0])),
+		  operands[1]));
       DONE;
     }
 
@@ -4063,8 +4059,10 @@
       ix86_expand_clear (operands[0]);
 
       gcc_assert (!TARGET_PARTIAL_REG_STALL);
-      emit_insn (gen_movstrictqi
-		  (gen_lowpart (QImode, operands[0]), operands[1]));
+      emit_insn (gen_rtx_SET
+		 (gen_rtx_STRICT_LOW_PART
+		  (VOIDmode, gen_lowpart (QImode, operands[0])),
+		  operands[1]));
       DONE;
     }
 
@@ -11835,7 +11833,7 @@
    (set_attr "mode" "QI")])
 
 (define_insn "*setcc_qi_slp"
-  [(set (strict_low_part (match_operand:QI 0 "nonimmediate_operand" "+qm"))
+  [(set (strict_low_part (match_operand:QI 0 "register_operand" "+q"))
 	(match_operator:QI 1 "ix86_comparison_operator"
 	  [(reg FLAGS_REG) (const_int 0)]))]
   ""
@@ -11864,7 +11862,7 @@
 })
 
 (define_split
-  [(set (strict_low_part (match_operand:QI 0 "nonimmediate_operand"))
+  [(set (strict_low_part (match_operand:QI 0 "register_operand"))
 	(ne:QI (match_operator 1 "ix86_comparison_operator"
 	         [(reg FLAGS_REG) (const_int 0)])
 	    (const_int 0)))]
@@ -11896,7 +11894,7 @@
 })
 
 (define_split
-  [(set (strict_low_part (match_operand:QI 0 "nonimmediate_operand"))
+  [(set (strict_low_part (match_operand:QI 0 "register_operand"))
 	(eq:QI (match_operator 1 "ix86_comparison_operator"
 	         [(reg FLAGS_REG) (const_int 0)])
 	    (const_int 0)))]