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

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)

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