re PR tree-optimization/48611 (ICE: SIGSEGV in remap_eh_region_nr (tree-inline.c:1194) with -Os -fopenmp -fexceptions -fno-tree-ccp -fno-tree-copy-prop on basic code)

	PR tree-optimization/48611
	PR tree-optimization/48794
	* tree-eh.c (remove_unreachable_handlers): Don't remove regions
	referenced from RESX or EH_DISPATCH arguments.

	* gfortran.dg/gomp/pr48611.f90: New test.
	* gfortran.dg/gomp/pr48794.f90: New test.

From-SVN: r173607