On 02/23/10 19:12, Joern Rennecke wrote: > Quoting "Paulo J. Matos" <pocma...@gmail.com>: >> I have a situation in writing a specific condition on an md file. >> I have an insn with 2 alternatives and then I use which_alternative to >> generate the assembler code but if which_alternative == 1 I am >> clobbering a register. How can I tell gcc that if it matches 1, a >> given register is clobbered? > > You use a clobber with a matching constraint for alternative 1 and X for > other alternatives. Make sure the patten is not named.
Thanks! -- PMatos
