[LLVMdev] memory lifetime and invariance
nicholas at mxc.ca
Tue May 19 00:32:38 PDT 2009
Chris Lattner wrote:
> FYI, I wrote up some thoughts on this here:
> The intention is to allow front-ends to express things like "I know
> this memory is a constant in this region" and to allow the optimizer/
> codegen to perform more aggressive stack slot merging.
Why does @llvm.invariant.end restate the size when it already takes the
call to @llvm.invariant.start as its first argument? Did you really mean
to allow for the case where part of an object is still invariant and
part isn't? If so, isn't it missing an offset as well?
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