| Summary: | [3.3 regression] [IA64] -funroll-loops -O removes loop termination | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Tim Prince <tprince> |
| Component: | rtl-optimization | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | gcc-bugs, steven, tprince |
| Priority: | P3 | Keywords: | wrong-code |
| Version: | 3.3 | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Known to work: | ||
| Known to fail: | Last reconfirmed: | ||
| Attachments: | badunroll.tar | ||
Fix: Use gcc-3.2.x or avoid -funroll-loops State-Changed-From-To: open->feedback
State-Changed-Why: Tim,
Can you verify this problem is still there?
The PR is against gcc-3.3 snapshot 20021028,
that's quite some time ago...
From: "Timothy C Prince" <tprince@myrealbox.com> To: steven@gcc.gnu.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, tprince@computer.org, gcc-gnats@gcc.gnu.org Cc: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, tprince@computer.org Subject: Re: Re: optimization/8414: [3.3 regression] [IA64] -funroll-loops -O removes loop termination Date: Sat, 22 Mar 2003 01:15:16 +0000 -----Original Message----- From: steven@gcc.gnu.org To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, tprince@= computer.org Date: 22 Mar 2003 00:08:58 -0000 Subject: Re: optimization/8414: [3.3 regression] [IA64] -funroll-loops -O r= emoves loop termination Synopsis: [3.3 regression] [IA64] -funroll-loops -O removes loop terminatio= n State-Changed-From-To: open->feedback State-Changed-By: steven State-Changed-When: Sat Mar 22 00:08:58 2003 State-Changed-Why: Tim, Can you verify this problem is still there? The PR is against gcc-3.3 snapshot 20021028, that's quite some time ago... http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=3Dview%20audit-trail&database=3D= gcc&pr=3D8414 This was fixed. I tried to post notification of that, but I don't know the= correct procedure. Thanks. Tim Prince State-Changed-From-To: feedback->closed
State-Changed-Why: Fixed according to the reporter.
In a private mail I also explained how to notify the gcc bug tracker of changes in the status of a PR.
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for loop termination condition ignored at -O -funroll-loops; loop runs until SEGV occurs. This is a regression from 3.2.1 and early 3.3 snapshots. main(){ double x[200]; int ii = 100; int k,i,ipntp = 0; while (ii > 1) { int ipnt = ipntp; ipntp += ii; ii /= 2; i = ipntp; for (k = ipnt + 1; k < ipntp; k += 2) x[++i] = x[k]; } } Similar problem was observed in g77. Release: gcc-3.3 snapshot 20021028 Environment: ITP "Big Sur" redhat 7.2, binutils 2.12.91, gdbf95 RC2 How-To-Repeat: gcc -O -funroll-loops -g badunroll.c gdb a.out r