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basic-block.h (fixup_abnormal_edges): Declare.

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* basic-block.h (fixup_abnormal_edges): Declare.
	* reload1.c (fixup_abnormal_edges): New function.
	* reg-stack.c (convert_regs): Use it.

	* gcse.c (insert_insn_end_bb): Handle trapping insns.

	* gcse.c (hash_scan_set): Refuse instructions with EH edges.

From-SVN: r50405
This commit is contained in:
Jan Hubicka 2002-03-07 16:38:00 +01:00 committed by Jan Hubicka
parent a9a437be8d
commit 068473ec92
5 changed files with 32 additions and 5 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
Thu Mar 7 16:33:54 CET 2002 Jan Hubicka <jh@suse.cz>
* basic-block.h (fixup_abnormal_edges): Declare.
* reload1.c (fixup_abnormal_edges): New function.
* reg-stack.c (convert_regs): Use it.
* gcse.c (insert_insn_end_bb): Handle trapping insns.
* gcse.c (hash_scan_set): Refuse instructions with EH edges.
2002-03-07 Richard Sandiford <rsandifo@redhat.com>
* defaults.h (MODE_HAS_NANS, MODE_HAS_INFINITIES): New.

1
gcc/basic-block.h
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@ -697,6 +697,7 @@ extern conflict_graph conflict_graph_compute
partition));
extern bool mark_dfs_back_edges PARAMS ((void));
extern void update_br_prob_note PARAMS ((basic_block));
extern void fixup_abnormal_edges PARAMS ((void));
/* In dominance.c */

21
gcc/gcse.c
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@ -2189,6 +2189,10 @@ hash_scan_set (pat, insn, set_p)
&& regno >= FIRST_PSEUDO_REGISTER
/* Don't GCSE something if we can't do a reg/reg copy. */
&& can_copy_p [GET_MODE (dest)]
/* GCSE commonly inserts instruction after the insn. We can't
do that easily for EH_REGION notes so disable GCSE on these
for now. */
&& !find_reg_note (insn, REG_EH_REGION, NULL_RTX)
/* Is SET_SRC something we want to gcse? */
&& want_to_gcse_p (src)
/* Don't CSE a nop. */
@ -4609,13 +4613,23 @@ insert_insn_end_bb (expr, bb, pre)
pat = process_insert_insn (expr);
/* If the last insn is a jump, insert EXPR in front [taking care to
handle cc0, etc. properly]. */
handle cc0, etc. properly]. Similary we need to care trapping
instructions in presence of non-call exceptions. */
if (GET_CODE (insn) == JUMP_INSN)
if (GET_CODE (insn) == JUMP_INSN
|| (GET_CODE (insn) == INSN
&& (bb->succ->succ_next || (bb->succ->flags & EDGE_ABNORMAL))))
{
#ifdef HAVE_cc0
rtx note;
#endif
/* It should always be the case that we can put these instructions
anywhere in the basic block with performing PRE optimizations.
Check this. */
if (GET_CODE (insn) == insn && pre
&& !TEST_BIT (antloc[bb->index], expr->bitmap_index)
&& !TEST_BIT (transp[bb->index], expr->bitmap_index))
abort ();
/* If this is a jump table, then we can't insert stuff here. Since
we know the previous real insn must be the tablejump, we insert
@ -4645,7 +4659,8 @@ insert_insn_end_bb (expr, bb, pre)
/* Likewise if the last insn is a call, as will happen in the presence
of exception handling. */
else if (GET_CODE (insn) == CALL_INSN)
else if (GET_CODE (insn) == CALL_INSN
&& (bb->succ->succ_next || (bb->succ->flags & EDGE_ABNORMAL)))
{
/* Keeping in mind SMALL_REGISTER_CLASSES and parameters in registers,
we search backward and place the instructions before the first

1
gcc/reg-stack.c
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@ -2854,6 +2854,7 @@ convert_regs (file)
}
}
fixup_abnormal_edges ();
if (inserted)
commit_edge_insertions ();

4
gcc/reload1.c
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@ -459,7 +459,7 @@ static void failed_reload PARAMS ((rtx, int));
static int set_reload_reg PARAMS ((int, int));
static void reload_cse_delete_noop_set PARAMS ((rtx, rtx));
static void reload_cse_simplify PARAMS ((rtx));
static void fixup_abnormal_edges PARAMS ((void));
void fixup_abnormal_edges PARAMS ((void));
extern void dump_needs PARAMS ((struct insn_chain *));
/* Initialize the reload pass once per compilation. */
@ -9465,7 +9465,7 @@ copy_eh_notes (insn, x)
proper call and fix the damage.
Similar handle instructions throwing exceptions internally. */
static void
void
fixup_abnormal_edges ()
{
int i;