From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5a) Gecko/20031010 Mozilla Firebird/0.6.1 Description of problem: (manish.singh reporting) gcc miscompiles the following attachment on ppc with -O1 or higher, in both 32 and 64-bit mode. A similar case in real world code trips up ia64 as well, but works fine with this simple test case. I'm hoping a fix will address the problems on both targets. x86 and amd64 are not affected. Version-Release number of selected component (if applicable): gcc-3.2.3-20 How reproducible: Always Steps to Reproduce: 1. gcc -O2 -o gccbug gccbug.c 2. ./gccbug Actual Results: prints 0 Expected Results: should've printed 1 Additional info:
Created attachment 95127 [details] Test case
Testing with cross-compiler from i686: Fails with head-of-branch of gcc-3.2-rh as of 20041002. Succeeds with head-of-branch of gcc-3.3. Compilation goes wonky during .15.life. Without digging too deeply, it looks like it might be pre-subreg-rationalization confusion. If true, it's likely that the hinted ia64 problem is different, as this would only affect big-endian targets.
This bug is filed against RHEL 3, which is in maintenance phase. During the maintenance phase, only security errata and select mission critical bug fixes will be released for enterprise products. Since this bug does not meet that criteria, it is now being closed. For more information of the RHEL errata support policy, please visit: http://www.redhat.com/security/updates/errata/ If you feel this bug is indeed mission critical, please contact your support representative. You may be asked to provide detailed information on how this bug is affecting you.