------- Comment #23 from mkuvyrkov at gcc dot gnu dot org 2010-05-06 15:07 ------- Subject: Re: [4.6 Regression] Revision 158105 miscompiles doduc.f90
On 5/6/10 6:59 PM, dominiq at lps dot ens dot fr wrote: ... > Now the questions are: > (1) why a change dealing with the propagation of minus signs interferes with > reciprocal-math? > (2) why moving VEC_safe_push from negate_value to eliminate_plus_minus_pair > trigger the miscompilation? Just to be clear, I do not think there is a miscompilation here. The patch that [among other things] moved VEC_safe_push from negate_value to eliminate_plus_minus_pair did that to enable "(a + (-b)) -> (a - b)" optimization in more cases. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43716
