/* Implements exception handling.
Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
/* Implements exception handling.
Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@cygnus.com>.
Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@cygnus.com>.
a given statement does throw. During this lowering process,
we create an EH_LANDING_PAD node for each EH_REGION that has
some code within the function that needs to be executed if a
a given statement does throw. During this lowering process,
we create an EH_LANDING_PAD node for each EH_REGION that has
some code within the function that needs to be executed if a
used to transfer control from an inner EH_REGION to an outer
EH_REGION. We also create EH_DISPATCH statements as placeholders
for a runtime type comparison that should be made in order to
used to transfer control from an inner EH_REGION to an outer
EH_REGION. We also create EH_DISPATCH statements as placeholders
for a runtime type comparison that should be made in order to
handler for the exception must be within a function somewhere
up the call chain, so we call back into the exception runtime
(__builtin_unwind_resume).
handler for the exception must be within a function somewhere
up the call chain, so we call back into the exception runtime
(__builtin_unwind_resume).
During pass_expand (cfgexpand.c), we generate REG_EH_REGION notes
that create an rtl to eh_region mapping that corresponds to the
gimple to eh_region mapping that had been recorded in the
During pass_expand (cfgexpand.c), we generate REG_EH_REGION notes
that create an rtl to eh_region mapping that corresponds to the
gimple to eh_region mapping that had been recorded in the
frame are emitted at this time.
During pass_convert_to_eh_region_ranges (except.c), we transform
frame are emitted at this time.
During pass_convert_to_eh_region_ranges (except.c), we transform
non-overlapping ranges of insns bounded by NOTE_INSN_EH_REGION_BEG
and NOTE_INSN_EH_REGION_END. Each insn within such ranges has the
same associated action within the exception region tree, meaning
non-overlapping ranges of insns bounded by NOTE_INSN_EH_REGION_BEG
and NOTE_INSN_EH_REGION_END. Each insn within such ranges has the
same associated action within the exception region tree, meaning
/* Copy all the regions in the subtree. */
if (copy_region)
duplicate_eh_regions_1 (&data, copy_region, outer_region);
/* Copy all the regions in the subtree. */
if (copy_region)
duplicate_eh_regions_1 (&data, copy_region, outer_region);
x = emit_library_call_value (setjmp_libfunc, NULL_RTX, LCT_RETURNS_TWICE,
TYPE_MODE (integer_type_node), 1,
plus_constant (XEXP (fc, 0),
x = emit_library_call_value (setjmp_libfunc, NULL_RTX, LCT_RETURNS_TWICE,
TYPE_MODE (integer_type_node), 1,
plus_constant (XEXP (fc, 0),
emit_cmp_and_jump_insns (x, const0_rtx, NE, 0,
TYPE_MODE (integer_type_node), 0, dispatch_label);
emit_cmp_and_jump_insns (x, const0_rtx, NE, 0,
TYPE_MODE (integer_type_node), 0, dispatch_label);
- add_reg_br_prob_note (get_insns (), REG_BR_PROB_BASE/100);
+ last = get_last_insn ();
+ if (JUMP_P (last) && any_condjump_p (last))
+ {
+ gcc_assert (!find_reg_note (last, REG_BR_PROB, 0));
+ add_reg_note (last, REG_BR_PROB, GEN_INT (REG_BR_PROB_BASE / 100));
+ }
}
#else
expand_builtin_setjmp_setup (plus_constant (XEXP (fc, 0), sjlj_fc_jbuf_ofs),
}
#else
expand_builtin_setjmp_setup (plus_constant (XEXP (fc, 0), sjlj_fc_jbuf_ofs),
if (lp->post_landing_pad)
EH_LANDING_PAD_NR (lp->post_landing_pad) = 0;
VEC_replace (eh_landing_pad, cfun->eh->lp_array, lp->index, NULL);
if (lp->post_landing_pad)
EH_LANDING_PAD_NR (lp->post_landing_pad) = 0;
VEC_replace (eh_landing_pad, cfun->eh->lp_array, lp->index, NULL);
At the gimple level, we use LP_NR
> 0 : The statement transfers to landing pad LP_NR
At the gimple level, we use LP_NR
> 0 : The statement transfers to landing pad LP_NR