[LLVMbugs] [Bug 586] [instcombine] miscompile of (X != 13) | (X < 15)

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.cs.uiuc.edu/bugs/show_bug.cgi?id=586

sabre at nondot.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
          Component|llvm-gcc                    |Scalar Optimizations
           Keywords|                            |miscompilation
         OS/Version|Linux                       |All
            Product|tools                       |libraries
           Platform|PC                          |All
         Resolution|                            |FIXED
            Summary|Output of program differs   |[instcombine] miscompile of
                   |between debug & optimized   |(X != 13) | (X < 15)
                   |versions                    |
   Target Milestone|---                         |1.6
            Version|1.5                         |1.3



------- Additional Comments From sabre at nondot.org  2005-06-16 23:01 -------
Fixed.  Testcase here:
Transforms/InstCombine/2005-06-16-SetCCOrSetCCMiscompile.ll

Patch here:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050613/026717.html

> Also, it looks like the random program generator has been pretty useful (found
> a gcc bug too).

It has been *incredibly* useful.  Thanks a lot for grinding on LLVM with it!!

-Chris



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