Hi Tim,
> From gcc online docs (http://gcc.gnu.org/onlinedocs/libgomp/), I found > documentations for most of OpenMP constructs, except one very > important construct TASK. I cannot answer this. It may be that the documentation was written before tasks (which were introduced in a latter version of OpenMP) were added to GCC OpenMP. > > I don't know why it is missing, but I really > need to find out how TASK get transformed into GOMP_* routines. I > posted this question before, but haven't got a reply yet. I am very > grateful if someone can point me to the right track. For example, is > there a pretty-print feature of the AST after processing the OpenMP > pragmas? If so, how? Of course, if someone have the expertise, and > directly show me how TASK get transformed, it would be even better! For the pretty print, just use -fdump-tree-ompexp-all on the compile line and look for the file *.c.*ompexp that is generated. It contains the dump just after OpenMP expansion. If you need to check out the code generation routines by yourself, take a look at gcc/omp-low.c Most of everything happens there. There are two passes, OpenMP lowerring then expansion. The generation of the GOMP_* routine calls happens during expansion pass and so you should start from the "expand_omp_taskreg" function (in gcc/omp-low.c). Best, Antoniu
