[LLVMbugs] [Bug 18056] New: SingleSource/Benchmarks/Misc/mandel failure in test-suite

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Nov 25 03:02:55 PST 2013


            Bug ID: 18056
           Summary: SingleSource/Benchmarks/Misc/mandel failure in
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: stpworld at narod.ru
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11608
  --> http://llvm.org/bugs/attachment.cgi?id=11608&action=edit
Test-suite log files

I got this test failure on freebsd-9.2 platform with a clang as system
$ clang --version
FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
Target: x86_64-unknown-freebsd9.2
Thread model: posix

1. Compile latest clang version (for me it was r193247).
2. Check it with test-suite. I did it with next command:

gmake VERBOSE=1 TEST=nightly report 1>test-suite-freebsd-9.2.log

`mandel` test fails with next message (quoted from .log file):
******************** TEST (jit) 'mandel' FAILED! ********************
Execution Context Diff:
Compared: -2.147484e+09 and -9.999000e+03
abs. diff = 2.147474e+09 rel.diff = 2.147688e+05
Out of tolerance: rel/abs: 1.000000e-03/0.000000e+00
******************** TEST (jit) 'mandel' ****************************

I consider it as clang bug, that only fired during bootstrapping with r183502
version. As base for this opinion I use fact, that it this test passed on
freebsd-8 machines with gcc system compiler.

Any questions are welcome.

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