[llvm-commits] Request for Review - avoid register pressure with read/modify/write instructions

[Joerg Sonnenberger]

On Wed, Mar 28, 2012 at 06:21:27PM -0700, Evan Cheng wrote:
> The store fusing case should be handled by the tablegen generated code.
> This is a special case because generated code can't handle load / op /
> store fusion when the operation produces a flag.

How is that different for the case of load (with other user) / op /
store and fusion of the op/store part? There is still the problem of
ensuring that nothing else can change the location between load and
store.

Joerg