re PR rtl-optimization/87065 (combine causes ICE in trunc_int_for_mode)

	PR rtl-optimization/87065
	* combine.c (simplify_if_then_else): Formatting fix.
	(if_then_else_cond): Guard MULT optimization with SCALAR_INT_MODE_P
	check.
	(known_cond): Don't return const_true_rtx for vector modes.  Use
	CONST0_RTX instead of const0_rtx.  Formatting fixes.

	* gcc.target/i386/pr87065.c: New test.

From-SVN: r263872

gcc/ChangeLog

+2018-08-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/87065
+	* combine.c (simplify_if_then_else): Formatting fix.
+	(if_then_else_cond): Guard MULT optimization with SCALAR_INT_MODE_P
+	check.
+	(known_cond): Don't return const_true_rtx for vector modes.  Use
+	CONST0_RTX instead of const0_rtx.  Formatting fixes.
+
 2018-08-27  Martin Liska  <mliska@suse.cz>
 
         PR gcov-profile/87069

gcc/combine.c

@@ -6495,7 +6495,7 @@ simplify_if_then_else (rtx x)
 			  pc_rtx, pc_rtx, 0, 0, 0);
       if (reg_mentioned_p (from, false_rtx))
 	false_rtx = subst (known_cond (copy_rtx (false_rtx), false_code,
-				   from, false_val),
+				       from, false_val),
 			   pc_rtx, pc_rtx, 0, 0, 0);
 
       SUBST (XEXP (x, 1), swapped ? false_rtx : true_rtx);
@@ -9335,6 +9335,7 @@ if_then_else_cond (rtx x, rtx *ptrue, rtx *pfalse)
 
 	  if (COMPARISON_P (cond0)
 	      && COMPARISON_P (cond1)
+	      && SCALAR_INT_MODE_P (mode)
 	      && ((GET_CODE (cond0) == reversed_comparison_code (cond1, NULL)
 		   && rtx_equal_p (XEXP (cond0, 0), XEXP (cond1, 0))
 		   && rtx_equal_p (XEXP (cond0, 1), XEXP (cond1, 1)))
@@ -9515,12 +9516,12 @@ known_cond (rtx x, enum rtx_code cond, rtx reg, rtx val)
 	  if (COMPARISON_P (x))
 	    {
 	      if (comparison_dominates_p (cond, code))
-		return const_true_rtx;
+		return VECTOR_MODE_P (GET_MODE (x)) ? x : const_true_rtx;
 
 	      code = reversed_comparison_code (x, NULL);
 	      if (code != UNKNOWN
 		  && comparison_dominates_p (cond, code))
-		return const0_rtx;
+		return CONST0_RTX (GET_MODE (x));
 	      else
 		return x;
 	    }
@@ -9563,7 +9564,7 @@ known_cond (rtx x, enum rtx_code cond, rtx reg, rtx val)
 	  /* We must simplify subreg here, before we lose track of the
 	     original inner_mode.  */
 	  new_rtx = simplify_subreg (GET_MODE (x), r,
-				 inner_mode, SUBREG_BYTE (x));
+				     inner_mode, SUBREG_BYTE (x));
 	  if (new_rtx)
 	    return new_rtx;
 	  else
@@ -9588,7 +9589,7 @@ known_cond (rtx x, enum rtx_code cond, rtx reg, rtx val)
 	  /* We must simplify the zero_extend here, before we lose
 	     track of the original inner_mode.  */
 	  new_rtx = simplify_unary_operation (ZERO_EXTEND, GET_MODE (x),
-					  r, inner_mode);
+					      r, inner_mode);
 	  if (new_rtx)
 	    return new_rtx;
 	  else

gcc/testsuite/ChangeLog

+2018-08-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/87065
+	* gcc.target/i386/pr87065.c: New test.
+
 2018-08-26  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/87080

gcc/testsuite/gcc.target/i386/pr87065.c

+/* PR rtl-optimization/87065 */
+/* { dg-do compile } */
+/* { dg-options "-O3 -mxop -mprefer-vector-width=128" } */
+
+int a, c, d, e;
+short *b;
+
+void
+foo (void)
+{
+  short *g = b;
+  int h = 1;
+  unsigned i;
+  for (; h <= 1; h++)
+    g = (short *) &c;
+  for (; c; c++)
+    {
+      for (; i <= 1; i++)
+	;
+      a ^= (a > 0 <= i) + ((e += d) == 0 ?: (*g = 8));
+    }
+}