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