http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55633
--- Comment #5 from dave.anglin at bell dot net 2012-12-11 01:16:16 UTC --- On 10-Dec-12, at 11:29 AM, jakub at gcc dot gnu.org wrote: > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55633 > > --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> > 2012-12-10 16:29:10 UTC --- > The test is really large, I guess it would be useful if you could > try to reduce > the testcase as long as it still fails that BIT_SIZE(integer(8)) test. > > Or can you step through the interesting part of the testcase and see > where > things go wrong? I've eyeballed the *.final assembly of the ma > computation and > it looks ok to me. I'm seeing different code: ; /home/dave/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/g77/f90- intrinsic-bit.f:48 .loc 1 48 0 ldi 0,%r28 ldi 0,%r29 .LBB19: ; /home/dave/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/g77/f90- intrinsic-bit.f:55 .loc 1 55 0 ldo -240(%r30),%r25 .LBE19: ; /home/dave/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/g77/f90- intrinsic-bit.f:48 .loc 1 48 0 stw %r28,-240(%r30) stw %r29,-236(%r30) .LBB20: ; /home/dave/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/g77/f90- intrinsic-bit.f:55 .loc 1 55 0 ldi 20,%r23 ldil LR'.LC12,%r26 ldil LR'.LC13,%r24 ldo RR'.LC12(%r26),%r26 ldo RR'.LC13(%r24),%r24 bl c_i8_,%r2 ldil LR'.LC15,%r3 The second argument of the call is passed in r25 (pointer to ma). As can be seen, ma is 0. In .expand, we have: ma = 0; c_i8 (&C.920, &ma, &"BIT_SIZE(integer(8))"[1]{lb: 1 sz: 1}, 20); So, I guess this is likely a tree optimization bug. -- John David Anglin dave.ang...@bell.net
