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Re: [PATCH] Fix PR37795


On Mon, 13 Oct 2008, Paolo Bonzini wrote:

> 
> > +       if (!(t = combine_comparisons (TRUTH_AND_EXPR, code1, code2,
> 
> TRUTH_ANDIF_EXPR, and likewise below.  The difference being...
> 
>         /* In a short-circuited boolean expression the LHS might be
>            such that the RHS, if evaluated, will never trap.  For
>            example, in ORD (x, y) && (x < y), we evaluate the RHS only
>            if neither x nor y is NaN.  (This is a mixed blessing: for
>            example, the expression above will never trap, hence
>            optimizing it to x < y would be invalid).  */
> 
>         /* If the comparison was short-circuited, and only the RHS
>            trapped, we may now generate a spurious trap.  */

You are right.  Thanks for noticing.

Richard.


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