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Re: Bug? flow_find_cross_jump deletes USE insns ...
On Wed, Jan 16, 2002 at 11:41:03AM +0100, Jakub Jelinek wrote:
> What is the preferred way here?
> Use some dummy unspec insn which will contain all the USEs, or use some
> unspec insn in the sets (like
> (set (reg:DI 33 r35) (unspec:DI[(reg:DI 320 b0)] FOO))
> ), or something else?
Another way is to leave the existing insn as-is and have
(unspec:DI [(reg:DI r35)] FOO)
and make it type ignore. That creates a generic "use"
for the two or three places in the prologue that need this.
r~