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2011-07-25 Tristan Gingold <gingold@adacore.com>

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* frags.c (frag_grow): Simplify the code.
This commit is contained in:
Tristan Gingold 2011-07-25 13:34:40 +00:00
parent d9b3f62eb2
commit 179809c050
2 changed files with 30 additions and 20 deletions
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4
gas/ChangeLog
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@ -1,3 +1,7 @@
2011-07-25 Tristan Gingold <gingold@adacore.com>
* frags.c (frag_grow): Simplify the code.
2011-07-24 Maciej W. Rozycki <macro@codesourcery.com>
Chao-ying Fu <fu@mips.com>
Richard Sandiford <rdsandiford@googlemail.com>

36
gas/frags.c
View file

@ -75,41 +75,47 @@ frag_alloc (struct obstack *ob)
return ptr;
}
/* Try to augment current frag by nchars chars.
/* Try to augment current frag by NCHARS chars.
If there is no room, close of the current frag with a ".fill 0"
and begin a new frag. Unless the new frag has nchars chars available
do not return. Do not set up any fields of *now_frag. */
and begin a new frag. Do not set up any fields of *now_frag. */
void
frag_grow (unsigned int nchars)
{
if (obstack_room (&frchain_now->frch_obstack) < nchars)
{
unsigned int n;
long oldc;
long newc;
/* Not enough room in this frag. Close it. */
frag_wane (frag_now);
frag_new (0);
oldc = frchain_now->frch_obstack.chunk_size;
/* Try to allocate a bit more than needed right now. But don't do
this if we would waste too much memory. Especially necessary
for extremely big (like 2GB initialized) frags. */
if (nchars < 0x10000)
frchain_now->frch_obstack.chunk_size = 2 * nchars;
newc = 2 * nchars;
else
frchain_now->frch_obstack.chunk_size = nchars + 0x10000;
frchain_now->frch_obstack.chunk_size += SIZEOF_STRUCT_FRAG;
if (frchain_now->frch_obstack.chunk_size > 0)
while ((n = obstack_room (&frchain_now->frch_obstack)) < nchars
&& (unsigned long) frchain_now->frch_obstack.chunk_size > nchars)
newc = nchars + 0x10000;
newc += SIZEOF_STRUCT_FRAG;
if (newc > 0)
{
frag_wane (frag_now);
/* Force to allocate at least NEWC bytes. */
oldc = obstack_chunk_size (&frchain_now->frch_obstack);
obstack_chunk_size (&frchain_now->frch_obstack) = newc;
/* Do the real work: create a new frag. */
frag_new (0);
/* Restore the old chunk size. */
obstack_chunk_size (&frchain_now->frch_obstack) = oldc;
}
frchain_now->frch_obstack.chunk_size = oldc;
}
/* Check for success (also handles negative values of NEWC). */
if (obstack_room (&frchain_now->frch_obstack) < nchars)
as_fatal (_("can't extend frag %u chars"), nchars);
}
}
/* Call this to close off a completed frag, and start up a new (empty)