----- Original Message ---- > From: Jamie Prescott <jpre...@yahoo.com> > To: gcc@gcc.gnu.org > Sent: Monday, May 11, 2009 11:59:23 PM > Subject: Code generation problem with optimizations enabled
> If I disable the optimizations, everything is fine and the 'fcmp' is there. > Even with optimizations enabled, the RTL dump shows the missing 'cmpdf' > present > and correctly recognized. It being: What I noticed is that if I CC_STATUS_INIT (in xxx_notice_update_cc()) even for insn that do not require it (that are almost all of them - being only cmp/fcmp/test that modify cc0), cmpdf gets emitted regularly. Normally all the insn but cmp/fcmp/test set "none" in their cc attribute, and xxx_notice_update_cc() does nothing in that case. While cmp and fcmp (that set the cc attribute to "compare") do CC_STATUS_INIT and records DEST and SRC operands. Am I doing it wrong? - Jamie