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toplev.c (rest_of_compilation): Always call jump_optimize at least once.

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* toplev.c (rest_of_compilation): Always call jump_optimize
	at least once.

From-SVN: r10613
This commit is contained in:
Jeff Law 1995-11-27 09:19:26 -07:00
parent ad238e4b39
commit cc4e79d826
1 changed files with 5 additions and 11 deletions
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16
gcc/toplev.c
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@ -2815,17 +2815,11 @@ rest_of_compilation (decl)
for all references to such slots. */
/* fixup_stack_slots (); */
/* Do jump optimization the first time, if -opt.
Also do it if -W, but in that case it doesn't change the rtl code,
it only computes whether control can drop off the end of the function. */
if (optimize > 0 || extra_warnings || warn_return_type
/* If function is `noreturn', we should warn if it tries to return. */
|| TREE_THIS_VOLATILE (decl))
{
TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
}
/* Always do one jump optimization pass to ensure that JUMP_LABEL fields
are initialized and to compute whether control can drop off the end
of the function. */
TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
/* Now is when we stop if -fsyntax-only and -Wreturn-type. */
if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))