X10 Code

Use the callsite position information instead of the callee method
for the assignments introduced by the inliner to assign the actuals
to the formals. Since the assignment is on the boundary (LHS from the
callee, RHS from the caller), either position could be used. But,
(1) picking the caller's makes it easier to map back to the source from
the generated code and (2) is arguably more useful since the RHS is
the interesting part of the operation and may be a complex expression.

Yet another StmtExpr simplification that is a common pattern
introduced by the Inliner.
StmtExpr({ STMTS1; var tmp; STMTS2; tmp = E; }, tmp})
is now simplified to
StmtExpr({ STMTS1; var tmp; STMTS2; }, E})

Minor cleanup. Add missing constraint on return type of Unsage.uncheckedRailSet
so that callers of uncheckedRailSet in x10.array.* can directly return
its result (instead of keeping v live in another variable to return).

Remove useless directories.

add -O0 -O1 -O2 -O3 -O4 -O5 options to x10c/x10c++ to enable simpler
control of post-compiler optimization level

update todo list

LULESH: revert indexing hacks from r29241 which appear to no longer be needed after Dave's improvements to code generation

Bugfix: when creating a new team, the list of algorithms to use for each collective was not getting populated correctly at places other than the creating place.

Fix for XTENLANG-3509: Problem creating new team from a non-member place

Tagging X10DT trunk revision 29602 as SF_RELEASE_2_5_3 release of X10DT