On 1/24/07, zouqiong <[EMAIL PROTECTED]> wrote:
En, I don't know whether OPT can eliminate such code:
aload_0
getfield 5 aload_0
aload_0 ==> getfield 5
getfield 5 dup
If it can eliminate them; I add tracing code as follows:
aload_0 aload_0
getfield 5 call ObjectRecord
aload_0 ==> getfield 5
getfield 5 aload_0
call ObjectRecord
getfield 5
I am afraid the instrumented "Call ObjectRecord" will cause the redundant
code can't be eliminated.
You are right. If the only change you do is a new extra call in translator
it will limit optimizations. The best place to add tracing calls could be
hir2lir conversion, after all HLO optimizations were finished, but in this
case your helper can't be inlined.
If you want your helper to be inlined try to add additional 'getfield'
instrumentation pass into the middle of optimizer's pipeline: after inliner
and memopt.
--
Mikhail Fursov
