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Re: Re: GCC-4.5.2 Has Serious Problems
 

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chemoelectric at chemoelectric

Jun 30, 2011, 7:22 PM


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Re: Re: GCC-4.5.2 Has Serious Problems [In reply to]

Frank Peters <frank.peters [at] comcast> skribis:
> A few days ago I posted about a possible problem with a floating
> point test called the UCBTEST. After examining the source code
> of this test, I see violations of aliasing rules throughout.
> It's hard to efficiently manipulate variables without them.

C is essentially a glorified assembly language for PDP-11, designed
for bit-twiddling, which the original K&R book encouraged, and which
this code is doing. So all is well, from my point of view. :) Fancy
optimizations are not to be trusted on assembly code; never be afraid
to turn them off. You probably don’t need them, anyway. :)

Subject User Time
GCC-4.5.2 Has Serious Problems frank.peters at comcast Jun 30, 2011, 2:45 PM
    Re: GCC-4.5.2 Has Serious Problems wonko at wonkology Jun 30, 2011, 3:30 PM
        Re: GCC-4.5.2 Has Serious Problems frank.peters at comcast Jun 30, 2011, 4:34 PM
        Re: Re: GCC-4.5.2 Has Serious Problems ianmcc at physik Jun 30, 2011, 7:30 PM
    Re: GCC-4.5.2 Has Serious Problems realnc at arcor Jun 30, 2011, 4:35 PM
        Re: GCC-4.5.2 Has Serious Problems realnc at arcor Jun 30, 2011, 4:44 PM
            Re: Re: GCC-4.5.2 Has Serious Problems frank.peters at comcast Jun 30, 2011, 5:04 PM
                Re: GCC-4.5.2 Has Serious Problems realnc at arcor Jun 30, 2011, 5:11 PM
                    Re: GCC-4.5.2 Has Serious Problems 1i5t5.duncan at cox Jun 30, 2011, 5:58 PM
                        Re: Re: GCC-4.5.2 Has Serious Problems frank.peters at comcast Jun 30, 2011, 6:23 PM
                            Re: GCC-4.5.2 Has Serious Problems 1i5t5.duncan at cox Jun 30, 2011, 6:52 PM
                            Re: Re: GCC-4.5.2 Has Serious Problems ianmcc at physics Jun 30, 2011, 7:15 PM
                            Re: Re: GCC-4.5.2 Has Serious Problems markknecht at gmail Jun 30, 2011, 9:36 PM
                                Re: Re: GCC-4.5.2 Has Serious Problems frank.peters at comcast Jun 30, 2011, 10:22 PM
            Re: Re: GCC-4.5.2 Has Serious Problems frank.peters at comcast Jun 30, 2011, 5:25 PM
            Re: Re: GCC-4.5.2 Has Serious Problems frank.peters at comcast Jun 30, 2011, 6:04 PM
                Re: GCC-4.5.2 Has Serious Problems 1i5t5.duncan at cox Jun 30, 2011, 7:18 PM
                Re: Re: GCC-4.5.2 Has Serious Problems chemoelectric at chemoelectric Jun 30, 2011, 7:22 PM
                    Re: Re: GCC-4.5.2 Has Serious Problems frank.peters at comcast Jun 30, 2011, 7:43 PM
                Re: GCC-4.5.2 Has Serious Problems realnc at arcor Jul 1, 2011, 4:53 AM
                    Re: Re: GCC-4.5.2 Has Serious Problems frank.peters at comcast Jul 1, 2011, 9:53 AM

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