re PR ipa/86271 (ICE due to size mismatch when inlining)

2018-06-26  Richard Biener  <rguenther@suse.de>

	PR middle-end/86271
	* fold-const.c (fold_convertible_p): Pointer extension
	isn't valid.

	* gcc.dg/pr86271.c: New testcase.

From-SVN: r262131

gcc/ChangeLog

+2018-06-26  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/86271
+	* fold-const.c (fold_convertible_p): Pointer extension
+	isn't valid.
+
 2018-06-26  Alexandre Oliva <aoliva@redhat.com>
 
 	PR debug/86064

gcc/fold-const.c

@@ -2358,7 +2358,9 @@ fold_convertible_p (const_tree type, const_tree arg)
     case INTEGER_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE:
     case POINTER_TYPE: case REFERENCE_TYPE:
     case OFFSET_TYPE:
-      return (INTEGRAL_TYPE_P (orig) || POINTER_TYPE_P (orig)
+      return (INTEGRAL_TYPE_P (orig)
+	      || (POINTER_TYPE_P (orig)
+		  && TYPE_PRECISION (type) <= TYPE_PRECISION (orig))
 	      || TREE_CODE (orig) == OFFSET_TYPE);
 
     case REAL_TYPE:

gcc/testsuite/ChangeLog

+2018-06-26  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/86271
+	* gcc.dg/pr86271.c: New testcase.
+
 2018-06-26  Alexandre Oliva <aoliva@redhat.com>
 
 	PR debug/86064

gcc/testsuite/gcc.dg/pr86271.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+int main ()
+{
+  int i;
+  foobar (i, &i); /* { dg-warning "implicit declaration" } */
+}
+
+int foobar (int a, long long b)
+{
+  int c;
+
+  c = a % b;
+  a = a / b;
+  return a + b;
+}