tree 420b802e0e8e8e02e6bea03808ef8f7aa7850719
parent 53ced034cd81f35ea9b37ca977cf6634ddaa7cf9
author Alexandre Rames <alexandre.rames@linaro.org> 1448031765 +0000
committer Alexandre Rames <alexandre.rames@linaro.org> 1448031765 +0000

Opt compiler: More strength reduction for multiplications.

We transform code looking like

   MUL dst, src, (2^n + 1)

into

   SHL tmp, src, n
   ADD dst, src, tmp

and code looking like

   MUL dst, src, (2^n - 1)

into

   SHL tmp, src, n
   SUB dst, tmp, src

Change-Id: Ia620ab68758caa70a01530b88cd65dd0444376d7