Re: question about speculative scheduling in gcc

2009-09-20 Thread Amker.Cheng
On Sun, Sep 20, 2009 at 3:43 PM, Maxim Kuvyrkov wrote: > Amker.Cheng wrote: >> >> Hi : >> I'm puzzled when looking into speculative scheduling in gcc, the 4.2.4 >> version. >> >> First, I noticed the document describing IBM haifa instruction >> scheduler(as PowerPC Reference Compiler Optimization

Re: question about speculative scheduling in gcc

2009-09-20 Thread Maxim Kuvyrkov
Amker.Cheng wrote: Hi : I'm puzzled when looking into speculative scheduling in gcc, the 4.2.4 version. First, I noticed the document describing IBM haifa instruction scheduler(as PowerPC Reference Compiler Optimization Project). It presents that the instruction motion from bb s(dominated by t)

question about speculative scheduling in gcc

2009-09-19 Thread Amker.Cheng
Hi : I'm puzzled when looking into speculative scheduling in gcc, the 4.2.4 version. First, I noticed the document describing IBM haifa instruction scheduler(as PowerPC Reference Compiler Optimization Project). It presents that the instruction motion from bb s(dominated by t) to t is speculative