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basic-block.h (EDGE_SIBCALL): New. 

* basic-block.h (EDGE_SIBCALL): New.
        (EDGE_ALL_FLAGS): Update.
        * cfg.c (dump_edge_info): Add sibcall name.
        * cfgbuild.c (make_edges): Use EDGE_SIBCALL.
        * cfgrtl.c (purge_dead_edges): Handle sibcalls.

From-SVN: r67602
This commit is contained in:
Richard Henderson 2003-06-07 14:30:49 -07:00 committed by Richard Henderson
parent 5145a02e5d
commit 1722c2c871
5 changed files with 28 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2003-06-07 Richard Henderson <rth@redhat.com>
* basic-block.h (EDGE_SIBCALL): New.
(EDGE_ALL_FLAGS): Update.
* cfg.c (dump_edge_info): Add sibcall name.
* cfgbuild.c (make_edges): Use EDGE_SIBCALL.
* cfgrtl.c (purge_dead_edges): Handle sibcalls.
2003-06-07 Andreas Jaeger <aj@suse.de>
* mklibgcc.in (lib2funcs): Remove _exit.

3
gcc/basic-block.h
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@ -151,7 +151,8 @@ typedef struct edge_def {
#define EDGE_CAN_FALLTHRU 64 /* Candidate for straight line
flow. */
#define EDGE_IRREDUCIBLE_LOOP 128 /* Part of irreducible loop. */
#define EDGE_ALL_FLAGS 255
#define EDGE_SIBCALL 256 /* Edge from sibcall to exit. */
#define EDGE_ALL_FLAGS 511
#define EDGE_COMPLEX (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL | EDGE_EH)

6
gcc/cfg.c
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@ -652,8 +652,10 @@ dump_edge_info (file, e, do_succ)
if (e->flags)
{
static const char * const bitnames[]
= {"fallthru", "ab", "abcall", "eh", "fake", "dfs_back", "can_fallthru","irreducible"};
static const char * const bitnames[] = {
"fallthru", "ab", "abcall", "eh", "fake", "dfs_back",
"can_fallthru", "irreducible", "sibcall"
};
int comma = 0;
int i, flags = e->flags;

3
gcc/cfgbuild.c
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@ -406,8 +406,7 @@ make_edges (label_value_list, min, max, update_p)
worry about EH edges, since we wouldn't have created the sibling call
in the first place. */
if (code == CALL_INSN && SIBLING_CALL_P (insn))
cached_make_edge (edge_cache, bb, EXIT_BLOCK_PTR,
EDGE_ABNORMAL | EDGE_ABNORMAL_CALL);
cached_make_edge (edge_cache, bb, EXIT_BLOCK_PTR, EDGE_SIBCALL);
/* If this is a CALL_INSN, then mark it as reaching the active EH
handler for this CALL_INSN. If we're handling non-call

13
gcc/cfgrtl.c
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@ -2299,6 +2299,19 @@ purge_dead_edges (bb)
return purged;
}
else if (GET_CODE (insn) == CALL_INSN && SIBLING_CALL_P (insn))
{
/* First, there should not be any EH or ABCALL edges resulting
from non-local gotos and the like. If there were, we shouldn't
have created the sibcall in the first place. Second, there
should of course never have been a fallthru edge. */
if (!bb->succ || bb->succ->succ_next)
abort ();
if (bb->succ->flags != EDGE_SIBCALL)
abort ();
return 0;
}
/* If we don't see a jump insn, we don't know exactly why the block would
have been broken at this point. Look for a simple, non-fallthru edge,