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