code review 6800043: cmd/gc: inlining functions with local variables

cmd/gc: inlining functions with local variables

- make sure dclcontext == PAUTO only in function bodies
- introduce PDISCARD to discard declarations in bodies of repeated imports
- skip printing initializing OAS'es in export mode, assuming they only occur after ODCL's
- remove ODCL and the initializing OAS from inl.c:ishairy
- fix confused use of ->typecheck in typecheckinl: it's about the ->inl, not about the fn.
- debuging aids: print ntype on ONAMEs too and -Emm instead of -Ell.

fixes issue 2812

[lvd, 2012-10-26 16:30:04]

Hello rsc@golang.org (cc: golang-dev@googlegroups.com),

I'd like you to review this change to
https://go.googlecode.com/hg/

[rsc, 2012-10-29 12:43:19]

LGTM

in the cl desc s/:/ / in the fixes issue line

[lvd, 2012-10-29 12:55:31]

*** Submitted as http://code.google.com/p/go/source/detail?r=bb4ee132b967 ***

cmd/gc: inlining functions with local variables

- make sure dclcontext == PAUTO only in function bodies
- introduce PDISCARD to discard declarations in bodies of repeated imports
- skip printing initializing OAS'es in export mode, assuming they only occur
after ODCL's
- remove ODCL and the initializing OAS from inl.c:ishairy
- fix confused use of ->typecheck in typecheckinl: it's about the ->inl, not
about the fn.
- debuging aids: print ntype on ONAMEs too and -Emm instead of -Ell.

fixes issue 2812

R=rsc
CC=golang-dev
http://codereview.appspot.com/6800043