re PR target/54938 (sh libgcc_unpack_df.o fails to build: ../../../srcw/libgcc/fp-bit.h:221:19: internal compiler error: in emit_cmp_and_jump_insn_1, at optabs.c:4273)

2012-10-31   Easwaran Raman  <eraman@google.com>

	PR target/54938
	PR middle-end/54957
	* optabs.c (emit_cmp_and_jump_insn_1): Add REG_BR_PROB note
	only if it doesn't already exist.
	* stmt.c (get_outgoing_edge_probs): Return 0 if BB is NULL.
	(emit_case_dispatch_table): Handle the case where STMT_BB is
	NULL.
	(expand_sjlj_dispatch_table): Pass BB containing before_case
	to emit_case_dispatch_table.

From-SVN: r193052