HELP: finding the patch for a regression test case

[perugupa@csee.wvu.edu]

Hi,
  i am testing the regression test suite of gcc 3.3.3 on gcc 3.2.3 using
  the Dejagnu.I got the log information about the fails and passes.now

 how can i find the patch for those regression test cases? or...

 how will i know why that test case failed i mean which part of source
 code has caused the test test case failure?

 the bugzilla doesn't have any information regarding the test case name.is
 there any other way...

any help will be appreciated.thank you

regards
nath.