[dataflow]: PATCH COMMITTED

Richard Sandiford richard@codesourcery.com
Wed Nov 15 14:22:00 GMT 2006


Kenneth Zadeck <zadeck@naturalbridge.com> writes:
> Index: dce.c
> ===================================================================
> --- dce.c	(revision 118663)
> +++ dce.c	(working copy)
> @@ -68,6 +69,7 @@ deletable_insn_p (rtx insn)
>      case USE:
>      case PREFETCH:
>      case TRAP_IF:
> +    case UNSPEC:
>        return false;
>  
>      case CLOBBER:

You didn't mentioned this in the changelog.  Why is it needed?  UNSPEC
should not have any invisible side-effects: only UNSPEC_VOLATILE can
have those.

Richard



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