Hi Jeff, On Tue, Jul 18, 2017 at 11:17:48PM -0600, Jeff Law wrote: > It turns out combine-stack-adjustments would take > > allocate PROBE_INTERVAL > probe > allocate PROBE_INTERVAL > probe > allocate PROBE_INTERVAL > probe > allocate RESIDUAL > > And turn that into > > allocate (3 * PROBE_INTERVAL) + residual > probe > probe > probe > > Adjusting the address of the probes appropriately. Ugh. > > This patch introduces a new note that the backend can attach to a stack > adjustment which essentially tells c-s-a to not merge it into other > adjustments. THere's an x86 specific test to verify behavior.
Can only combine-stack-adjustments do this? It seems like something many passes could do, and then your new note doesn't help. Segher
