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.
