I am interested in learning more information in the assembly code obtained using the -XX command line: + PrintOptoAssembly (JIT compiler output) using the fast_debug OpenJDK assembly version 6-src-b23-05_jul_2011 on i686 GNU / Linux.
Inside the build code, there are some “annotations” after the label of each block:
02c B2:
...
063 B11:
My first assumption is that it B14 B3 <- B1 B13represents some information of the control flow and Freq: 1some information about the frequency that this mark is reached. Are these annotations branching hints (on platforms that support them)? Are they documented (publicly)?
Also, what's the point P=..., C=...and ,s?
02a Je,s B13 P=0.000000 C=6700.000000
Please let me know if you need some sample code.
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