On 04/04/14 10:18, Andreas Krebbel wrote:
Hi,the attached patch modifies the builtin-bswap-6/7 testcases in order to prevent GCC from using math instead of a compare. Only with a compare the folding in combine actually takes place. Whether the return value is produce with a compare or not depends again on the value of branch cost. Ideally we would be able to do the folding also with the math trick but it is probably not that easy since we have already lost the information that in the end all we need is a 0 or a 1. Ok? Bye, -Andreas- 2014-04-04 Andreas Krebbel <andreas.kreb...@de.ibm.com> * gcc.dg/builtin-bswap-6.c: Adjust return value to disable GCC optimization. * gcc.dg/builtin-bswap-7.c: Likewise.
OK. Jeff
