------- Comment #8 from gdr at integrable-solutions dot net 2007-01-05 21:06 ------- Subject: Re: [4.1/4.2/4.3 Regression] Wrong variable ranges due to constant folding
"jakub at gcc dot gnu dot org" <[EMAIL PROTECTED]> writes: | Do the parenthesis matter in C? Yes, see paragraphes 11 dowward in the section 5.1.2.3. | They do matter in say Fortran, but in C I | think | (a - 20) + (b - 20) can be evaluated as (a + b) + (-20 + -20) or a - 20 - 20 + | b while that is permitted by the fortran standard, it is my understanding that *existing* practice has fortran compilers refrain from messing with parenthesis. However, this has become a middle-end issue; so I guess I must voice the concern for languages where unconditional re-association is not permitted. The C and C++ languages are example of those. -- Gaby -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30364
