archapi: Use arbitrary rather than actual placement in predictDelay

This makes predictDelay be based on an arbitrary belpin pair rather
than a arc of a net based on cell placement. This way 'what-if'
decisions can be evaluated without actually changing placement;
potentially useful for parallel placement.

A new helper predictArcDelay behaves like the old predictDelay to
minimise the impact on existing passes; only arches need be updated.

Signed-off-by: gatecat <gatecat@ds0.me>

1 files changed, 1 insertions, 1 deletions

diff --git a/common/timing.cc b/common/timing.cc
index e305d82d..f30d4fc5 100644
--- a/common/timing.cc
+++ b/common/timing.cc
@@ -1378,7 +1378,7 @@ void timing_analysis(Context *ctx, bool print_histogram, bool print_fmax, bool p
                         auto driver_wire = ctx->getNetinfoSourceWire(net);
                         auto sink_wire = ctx->getNetinfoSinkWire(net, sink_ref, 0);
                         log_info("                 prediction: %f ns estimate: %f ns\n",
-                                 ctx->getDelayNS(ctx->predictDelay(net, sink_ref)),
+                                 ctx->getDelayNS(ctx->predictArcDelay(net, sink_ref)),
                                  ctx->getDelayNS(ctx->estimateDelay(driver_wire, sink_wire)));
                         auto cursor = sink_wire;
                         delay_t delay;