Questionable function renaming

["Bingfeng Mei" <bmei at broadcom dot com>]

Hello,

I came across a function renaming issue in GCC 4.4. 

~/work/install-x86/bin/gcc -Wall -Winline -O3 -g -D_FILE_OFFSET_BITS=64  -save-temps -c bzip2.c -fdump-tree-all


Function saveInputFileMetaInfo is renamed to T.251 after ipa passes, which are not dumped into intermediate files. So compare bzip2.c.038t.release_ssa and bzip2.c.049t.copyrename2 file, 

;; Function saveInputFileMetaInfo (saveInputFileMetaInfo)

Released 3 names, 50.00%
saveInputFileMetaInfo (Char * srcName)
{
  IntNative retVal;

<bb 2>:
  retVal_4 = __xstat (1, srcName_1(D), &fileMetaInfo);
  if (retVal_4 != 0)
    goto <bb 3>;
  else
    goto <bb 4>;

<bb 3>:
  ioError ();

<bb 4>:
  return;

}

becomes 

;; Function T.251 (T.251)

T.251 ()
{
  IntNative retVal;

<bb 2>:
  retVal_1 = __xstat (1, &inName, &fileMetaInfo);
  if (retVal_1 != 0)
    goto <bb 3>;
  else
    goto <bb 4>;

<bb 3>:
  ioError ();

<bb 4>:
  return;

}

The renamed function stays afterwards. My understanding is that ipa-cp pass did copy-propagation of the original function but still somehow create a clone as suggested bzip2.c.203t.statistics. 

bzip2.c.203t.statistics:35 copyprop "Copies propagated" "saveInputFileMetaInfo" 1
bzip2.c.203t.statistics:35 copyprop "Statements deleted" "saveInputFileMetaInfo" 3

This seems unnecessary and causes trouble in our profiling/debugging tools. I could diable this by using -fno-ipa-cp. But is there any better way? Thanks in advance

Cheers,
Bingfeng Mei

Boradcom UK

Attachment: bzip2.c;size=58665;creation-date="Tue,
Description: bzip2.c