re PR rtl-optimization/48721 (ICE: verify_flow_info failed: missing barrier after block 6 with -foptimize-sibling-calls -fsched2-use-superblocks)

	PR rtl-optimization/48721
	* sched-deps.c (sched_analyze_insn): For SIBLING_CALL_P set
	reg_pending_barrier to TRUE_BARRIER.

	* gcc.target/i386/pr48721.c: New test.

From-SVN: r181856