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Re: optimization/9052: in C code, "if" statement fails to execute if optimized

Eric Botcazou wrote:


How about 8445, 9654?  Those are "bugs" that disappear with
-ffloat-store, too.  Like I said, I don't know enough about floating
point numbers...



Toon seems to think that PR fortran/8445 is indeed the same problem. But it's 
up to him to decide whether to close the bug.



PR optimization/9654 is exactly the same problem: using FP registers on x86 
adds extra-precision which can modify comparison results. Nothing can be done 
about that, other than using -ffloat-store which is precisely intended to 
address the issue.



Exactly - however, I feel I cannot close these reports because I do not 
have access to x86 hardware anymore, so I cannot easily test whether 
they indeed *are* -ffloat-store issues ....



--

Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290

Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands

Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html

GNU Fortran 95: http://gcc-g95.sourceforge.net/ (under construction)


















  
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