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re PR rtl-optimization/51051 (build fails on cris-elf building libstdc++-v3)

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PR rtl-optimization/51051
	PR bootstrap/51086
	* function.c (thread_prologue_and_epilogue_insns): Guard
	emitting return with single_succ_p test.

From-SVN: r181391
This commit is contained in:
Alan Modra 2011-11-16 08:40:46 +10:30 committed by Alan Modra
parent e35525e9b4
commit 1ff2fd21dc
2 changed files with 9 additions and 1 deletions

7
gcc/ChangeLog

@ -1,3 +1,10 @@
2011-11-16 Alan Modra <amodra@gmail.com>
PR rtl-optimization/51051
PR bootstrap/51086
* function.c (thread_prologue_and_epilogue_insns): Guard
emitting return with single_succ_p test.
2011-11-15 Joern Rennecke <joern.rennecke@embecosm.com>
* config/epiphany/epiphany.md (mov<mode>cc): Fix code to

3
gcc/function.c

@ -6230,7 +6230,8 @@ thread_prologue_and_epilogue_insns (void)
&& !active_insn_between (BB_HEAD (last_bb), BB_END (last_bb)))
convert_jumps_to_returns (last_bb, false, NULL);
if (EDGE_COUNT (exit_fallthru_edge->src->preds) != 0)
if (EDGE_COUNT (last_bb->preds) != 0
&& single_succ_p (last_bb))
{
last_bb = emit_return_for_exit (exit_fallthru_edge, false);
epilogue_end = returnjump = BB_END (last_bb);