------- Comment #11 from sgk at troutmask dot apl dot washington dot edu 2008-02-17 19:59 ------- Subject: Re: IBITS gives compiler error
On Sun, Feb 17, 2008 at 07:10:19PM -0000, jvdelisle at gcc dot gnu dot org wrote: > ------- Comment #9 from jvdelisle at gcc dot gnu dot org 2008-02-17 19:10 > ------- > We do need to fix some things here. The runtime perhaps should catch the > invalid of pos + len > 32 for bit_size being 32. > (snip) > So I support removing the range check just for these bit manipulation > procedures. Yes, that is probably a good compromise, then let the middle-end deal with possible out of range values. One probably needs to check the expansion of i = -1 i = ibits(i,0,32) -fdump-tree-original shows i = -1; i = i >> 0 & ~(-1 << 32); for the above, which of course gives the user desired result of -1. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35223
