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On Tue, Mar 16, 2010 at 12:28 PM, Jakub Jelinek <jakub@redhat.com> wrote: > On Tue, Mar 16, 2010 at 12:05:41PM -0700, H.J. Lu wrote: >> > I'd say preventing the insn from being optimized is not desirable, instead >> > if the REG_EQUAL is not invariant, the note should be dropped. >> > >> > ? ? ? ?Jakub >> > >> >> Here is the updated patch. ?OK for trunk/4.4/4.3? > > Is every invariant insn for which find_invariant_insn succeeds actually > moved? ?I very much doubt so. ?Therefore, it would be IMHO better to > run this check in say create_new_invariant, set a new bool field > in struct invariant (say drop_reg_equal) and only if/when it is actually > moved drop the invariant if this field is true? > How about this patch? -- H.J.
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