[PATCH] D16123: Limit number of blocks scanned for non-local dependences

[Joerg Sonnenberger via llvm-commits]

On Wed, Jan 20, 2016 at 06:33:53PM +0000, Bruno Cardoso Lopes via llvm-commits wrote:
> Given your testcase (original bug), could you show how much time it
> takes for different BlockNumberLimit values? Although a 100 seems
> reasonable at first look, I wonder how much we can push the limit for the default value.

Run time in steps of 100, absolute value not necessarily stable:
2.5s 3.0s 3.3s 4.1s 4.1s 4.3s 4.8s 5.1s 5.4s 5.6s

It's not exactly surprising that the initial ramp up is mostly linear. I
simply don't know what the implications for runtime are at this point,
can't easily run LNT.

Joerg