[binutils-gdb] Speedup ELF orphan placement for relocatable link

[H.J.Lu]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=077fcd6a3b5729044acce83f77ebedd3adbadab0

commit 077fcd6a3b5729044acce83f77ebedd3adbadab0
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Feb 29 11:04:22 2016 -0800

    Speedup ELF orphan placement for relocatable link
    
    Since there is no need to place output sections in specific order for
    relocatable link, we can skip merging flags of other input sections.
    
    	PR ld/19739
    	* ld/emultempl/elf32.em (gld${EMULATION_NAME}_place_orphan): Don't
    	merge flags of other input sections for relocatable link.

Diff:
---
 ld/emultempl/elf32.em | 33 ++++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/ld/emultempl/elf32.em b/ld/emultempl/elf32.em
index f3ec875..3e9f684 100644
--- a/ld/emultempl/elf32.em
+++ b/ld/emultempl/elf32.em
@@ -1946,25 +1946,32 @@ gld${EMULATION_NAME}_place_orphan (asection *s,
       return os;
     }
 
+  flags = s->flags;
+  if (!bfd_link_relocatable (&link_info))
+    {
+      nexts = s;
+      while ((nexts = bfd_get_next_section_by_name (nexts->owner, nexts))
+	     != NULL)
+	if (nexts->output_section == NULL
+	    && (nexts->flags & SEC_EXCLUDE) == 0
+	    && ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0
+	    && (nexts->owner->flags & DYNAMIC) == 0
+	    && nexts->owner->usrdata != NULL
+	    && !(((lang_input_statement_type *) nexts->owner->usrdata)
+		 ->flags.just_syms)
+	    && _bfd_elf_match_sections_by_type (nexts->owner, nexts,
+						s->owner, s))
+	  flags = (((flags ^ SEC_READONLY)
+		    | (nexts->flags ^ SEC_READONLY))
+		   ^ SEC_READONLY);
+    }
+
   /* Decide which segment the section should go in based on the
      section name and section flags.  We put loadable .note sections
      right after the .interp section, so that the PT_NOTE segment is
      stored right after the program headers where the OS can read it
      in the first page.  */
 
-  flags = s->flags;
-  nexts = s;
-  while ((nexts = bfd_get_next_section_by_name (nexts->owner, nexts)) != NULL)
-    if (nexts->output_section == NULL
-	&& (nexts->flags & SEC_EXCLUDE) == 0
-	&& ((nexts->flags ^ flags) & (SEC_LOAD | SEC_ALLOC)) == 0
-	&& (nexts->owner->flags & DYNAMIC) == 0
-	&& nexts->owner->usrdata != NULL
-	&& !(((lang_input_statement_type *) nexts->owner->usrdata)
-	     ->flags.just_syms)
-	&& _bfd_elf_match_sections_by_type (nexts->owner, nexts, s->owner, s))
-      flags = (((flags ^ SEC_READONLY) | (nexts->flags ^ SEC_READONLY))
-	       ^ SEC_READONLY);
   place = NULL;
   if ((flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0)
     place = &hold[orphan_nonalloc];