i386.c (ix86_legitimate_combined_insn): Do not call recog here.

	* config/i386/i386.c (ix86_legitimate_combined_insn): Do not
	call recog here.  Assert that INSN_CODE (insn) is non-negative.

From-SVN: r244478

gcc/ChangeLog

+2017-01-15  Uros Bizjak  <ubizjak@gmail.com>
+
+	* config/i386/i386.c (ix86_legitimate_combined_insn): Do not
+	call recog here.  Assert that INSN_CODE (insn) is non-negative.
+
 2017-01-15  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	PR target/72749

gcc/config/i386/i386.c

@@ -8125,73 +8125,73 @@ ix86_return_pops_args (tree fundecl, tree funtype, int size)
 static bool
 ix86_legitimate_combined_insn (rtx_insn *insn)
 {
+  int i;
+
   /* Check operand constraints in case hard registers were propagated
      into insn pattern.  This check prevents combine pass from
      generating insn patterns with invalid hard register operands.
      These invalid insns can eventually confuse reload to error out
      with a spill failure.  See also PRs 46829 and 46843.  */
-  if ((INSN_CODE (insn) = recog (PATTERN (insn), insn, 0)) >= 0)
-    {
-      int i;
 
-      extract_insn (insn);
-      preprocess_constraints (insn);
+  gcc_assert (INSN_CODE (insn) >= 0);
 
-      int n_operands = recog_data.n_operands;
-      int n_alternatives = recog_data.n_alternatives;
-      for (i = 0; i < n_operands; i++)
-	{
-	  rtx op = recog_data.operand[i];
-	  machine_mode mode = GET_MODE (op);
-	  const operand_alternative *op_alt;
-	  int offset = 0;
-	  bool win;
-	  int j;
+  extract_insn (insn);
+  preprocess_constraints (insn);
 
-	  /* A unary operator may be accepted by the predicate, but it
-	     is irrelevant for matching constraints.  */
-	  if (UNARY_P (op))
-	    op = XEXP (op, 0);
+  int n_operands = recog_data.n_operands;
+  int n_alternatives = recog_data.n_alternatives;
+  for (i = 0; i < n_operands; i++)
+    {
+      rtx op = recog_data.operand[i];
+      machine_mode mode = GET_MODE (op);
+      const operand_alternative *op_alt;
+      int offset = 0;
+      bool win;
+      int j;
 
-	  if (SUBREG_P (op))
-	    {
-	      if (REG_P (SUBREG_REG (op))
-		  && REGNO (SUBREG_REG (op)) < FIRST_PSEUDO_REGISTER)
-		offset = subreg_regno_offset (REGNO (SUBREG_REG (op)),
-					      GET_MODE (SUBREG_REG (op)),
-					      SUBREG_BYTE (op),
-					      GET_MODE (op));
-	      op = SUBREG_REG (op);
-	    }
+      /* A unary operator may be accepted by the predicate, but it
+	 is irrelevant for matching constraints.  */
+      if (UNARY_P (op))
+	op = XEXP (op, 0);
 
-	  if (!(REG_P (op) && HARD_REGISTER_P (op)))
-	    continue;
+      if (SUBREG_P (op))
+	{
+	  if (REG_P (SUBREG_REG (op))
+	      && REGNO (SUBREG_REG (op)) < FIRST_PSEUDO_REGISTER)
+	    offset = subreg_regno_offset (REGNO (SUBREG_REG (op)),
+					  GET_MODE (SUBREG_REG (op)),
+					  SUBREG_BYTE (op),
+					  GET_MODE (op));
+	  op = SUBREG_REG (op);
+	}
 
-	  op_alt = recog_op_alt;
+      if (!(REG_P (op) && HARD_REGISTER_P (op)))
+	continue;
 
-	  /* Operand has no constraints, anything is OK.  */
- 	  win = !n_alternatives;
+      op_alt = recog_op_alt;
 
-	  alternative_mask preferred = get_preferred_alternatives (insn);
-	  for (j = 0; j < n_alternatives; j++, op_alt += n_operands)
-	    {
-	      if (!TEST_BIT (preferred, j))
-		continue;
-	      if (op_alt[i].anything_ok
-		  || (op_alt[i].matches != -1
-		      && operands_match_p
-			  (recog_data.operand[i],
-			   recog_data.operand[op_alt[i].matches]))
-		  || reg_fits_class_p (op, op_alt[i].cl, offset, mode))
-		{
-		  win = true;
-		  break;
-		}
-	    }
+      /* Operand has no constraints, anything is OK.  */
+      win = !n_alternatives;
 
-	  if (!win)
-	    return false;
+      alternative_mask preferred = get_preferred_alternatives (insn);
+      for (j = 0; j < n_alternatives; j++, op_alt += n_operands)
+	{
+	  if (!TEST_BIT (preferred, j))
+	    continue;
+	  if (op_alt[i].anything_ok
+	      || (op_alt[i].matches != -1
+		  && operands_match_p
+		  (recog_data.operand[i],
+		   recog_data.operand[op_alt[i].matches]))
+	      || reg_fits_class_p (op, op_alt[i].cl, offset, mode))
+	    {
+	      win = true;
+	      break;
+	    }
 	}
+
+      if (!win)
+	return false;
     }
 
   return true;