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except.h (can_throw): Declare it.
* except.h (can_throw): Declare it. * except.c (can_throw): Give it external linkage. * resource.c (find_dead_or_set_registers): Use can_throw. From-SVN: r34178
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@ -1,3 +1,9 @@
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2000-05-25 Mark Mitchell <mark@codesourcery.com>
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* except.h (can_throw): Declare it.
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* except.c (can_throw): Give it external linkage.
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* resource.c (find_dead_or_set_registers): Use can_throw.
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2000-05-25 Richard Henderson <rth@cygnus.com>
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* flow.c (mark_set_1): Don't record conditionally dead memory.
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@ -463,7 +463,6 @@ static void start_dynamic_cleanup PARAMS ((tree, tree));
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static void start_dynamic_handler PARAMS ((void));
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static void expand_rethrow PARAMS ((rtx));
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static void output_exception_table_entry PARAMS ((FILE *, int));
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static int can_throw PARAMS ((rtx));
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static rtx scan_region PARAMS ((rtx, int, int *));
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static void eh_regs PARAMS ((rtx *, rtx *, rtx *, int));
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static void set_insn_eh_region PARAMS ((rtx *, int));
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@ -2688,12 +2687,11 @@ free_eh_status (f)
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}
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/* This section is for the exception handling specific optimization
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pass. First are the internal routines, and then the main
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optimization pass. */
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pass. */
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/* Determine if the given INSN can throw an exception. */
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static int
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int
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can_throw (insn)
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rtx insn;
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{
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@ -439,6 +439,10 @@ extern struct label_node *outer_context_label_stack;
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extern rtx exception_handler_labels;
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/* Determine if the given INSN can throw an exception. */
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extern int can_throw PARAMS ((rtx));
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/* Return nonzero if nothing in this function can throw. */
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extern int nothrow_function_p PARAMS ((void));
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@ -422,6 +422,14 @@ find_dead_or_set_registers (target, res, jump_target, jump_count, set, needed)
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rtx this_jump_insn = insn;
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next = NEXT_INSN (insn);
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/* If this instruction can throw an exception, then we don't
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know where we might end up next. That means that we have to
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assume that whatever we have already marked as live really is
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live. */
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if (can_throw (insn))
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break;
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switch (GET_CODE (insn))
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{
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case CODE_LABEL:
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