re PR tree-optimization/46233 (ICE: verify_flow_info failed: control flow in the middle of basic block 3 with -foptimize-sibling-calls)

	PR tree-optimization/46233
	* ipa-pure-const.c (local_pure_const): Do noreturn discovery
	after calling analyze_function, not before.

	* gcc.dg/pr46233.c: New test.

From-SVN: r166324