commit 5c12507f5d0bc080e4f346af99824e039236e61c
author Richard Biener <rguenther@suse.de> Thu Jan 20 14:25:51 2022 +0100
committer Richard Biener <rguenther@suse.de> Thu Jan 20 16:50:34 2022 +0100
tree 61747d6d9370e7df95b11c42e3bfd3e423594302
parent 62eb400b51f8a552320a250b3ac0b5d2ebd8927f

middle-end/100786 - constant folding from incompatible alias

The following avoids us ICEing doing constant folding from variables
with aliases of different types.  The issue appears both in
folding and CCP and FRE can do more fancy stuff to still constant
fold cases where the load is smaller than the initializer so
defer it to there.

2022-01-20  Richard Biener  <rguenther@suse.de>

	PR middle-end/100786
	* gimple-fold.cc (get_symbol_constant_value): Only return
	values of compatible type to the symbol.

	* gcc.dg/torture/pr100786.c: New testcase.