tree-ssa optimizations

[Andrew Haley]

ranjith kumar writes:
 > 1) I know that auto-vectorization is done on GIMPLE.
 > I think I need to understand entire syntax GIMPLE to
 > understand internal files of gcc which does
 > auto-vectorization like tree-vectorizer.c.
 > Isn't it?
 > 2)Where can I get complete syntax of GIMPLE?

gcc/tree.def

 > 3) Is it possible to compile a .gimple/.ssa/.rtl file?

No.

 >    Actually I want to modify above representations of
 > a .c program  and compile the modified file.
 > If it is possible tell me how to do?

It is not possible.

Andrew.