re PR debug/50827 (ICE: RTL check: expected elt 0 type 'e' or 'u', have '0' (rtx entry_value) in loc_cmp, at var-tracking.c:3011)

	PR debug/50827
	* var-tracking.c (loc_cmp): For ENTRY_VALUEs use ENTRY_VALUE_EXP
	macro instead of XEXP.

	* gcc.dg/pr50827.c: New test.

From-SVN: r181597