From 179809c050ff97d2f72bab90b8b6fdc7f95eb0b7 Mon Sep 17 00:00:00 2001 From: Tristan Gingold Date: Mon, 25 Jul 2011 13:34:40 +0000 Subject: [PATCH] 2011-07-25 Tristan Gingold * frags.c (frag_grow): Simplify the code. --- gas/ChangeLog | 4 ++++ gas/frags.c | 46 ++++++++++++++++++++++++++-------------------- 2 files changed, 30 insertions(+), 20 deletions(-) diff --git a/gas/ChangeLog b/gas/ChangeLog index fd5769e7955..eab1325c152 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,7 @@ +2011-07-25 Tristan Gingold + + * frags.c (frag_grow): Simplify the code. + 2011-07-24 Maciej W. Rozycki Chao-ying Fu Richard Sandiford diff --git a/gas/frags.c b/gas/frags.c index fe3b4cced21..a0a0a298c99 100644 --- a/gas/frags.c +++ b/gas/frags.c @@ -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. */ + 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) - { - frag_wane (frag_now); - frag_new (0); - } - frchain_now->frch_obstack.chunk_size = oldc; + newc = nchars + 0x10000; + newc += SIZEOF_STRUCT_FRAG; + + if (newc > 0) + { + /* 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; + } + + /* 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); } - 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) -- 2.30.2