PR c++/70336
	* match.pd (nested int casts): Limit to GIMPLE.

	* c-c++-common/pr70336.c: New test.
	* gcc.dg/torture/builtin-isinf_sign-1.c (foo): Guard tests
	no longer optimized away at -O0 with #ifndef __OPTIMIZE__.

From-SVN: r234764