Re: Alias code

[Michael Meissner <meissner@cygnus.com>]

| We've got a little problem.
|
| While the machine independent code is mostly free of gen_rtx (MEM)
| calls, many of the target files, and some of the front-ends that we 
| want to interoperate (but possibly do not control) with are not free
| of such calls.
|
| I think we need to handle these cases in a clean manner.  ie, we
| have to initialize the alias set field when we allocate the MEM or
| REG expression

We could always have the generic gen_rtx complain when it builds a MEM,
possibly under flag/ifdef control.

| Thoughts?
|
| jeff
|
| ps.  i just spent 3hrs tracking down a case where the compiler would
| mis-compile a testcase, but not if you turned on -g or certain debug
| dumps -- it was tracked down to a call to gen_rtx (MEM) in a target
| config file.  I don't want to have to do this very often :(
|
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