Conflicts:

	src/rustc/middle/trans/alt.rs
	src/rustc/middle/trans/base.rs
	src/rustc/middle/trans/closure.rs
	src/rustc/middle/trans/impl.rs
	src/rustc/middle/trans/uniq.rs

This reverts commit 7ef825bb.

18s perf regression compiling rustc with opts

This reverts commit 7f6ee0ce.

cc #2540

This means GEPi now takes a list of uints. Apologies in advance
if this is hard to rebase against, but it gets rid of many a cast :-)

Also modernized some for loops here and there.

I had to xfail one existing test case (class-implements-int) because,
I think, of the same bug described in #2272.

    enter_opt was handling the (*) case wrong and causing a bounds check
    failure. Fixed it (the test case is one of the extracted ones from
    the reference manual)

Adds a new kind of pattern C(*) where C is a constructor that may
have any number of fields. This pattern matches any value
constructed with C, without binding names for any of the fields.

Closes #1701.

Issue #2201.

Pipe to xdu to see a trans call graph of generated insns.

This will make it easier to convert crate_ctxt into a region pointer, since
there are functions that return crate contexts. There would be no way to type
these functions if crate_ctxt had to be an inferred region pointer.

Only casts to integral and float types are supported

Closes #1975

Closes #1971

Closes #1931

This required changing almost all users of hashmaps to import the hashmap interface first.

The `size` member in the hashmap structure was renamed to `count` to work around a name conflict.

This reverts commit f0250a23.

This required changing almost all users of hashmaps to import the hashmap interface first.

The `size` member in the hashmap structure was renamed to `count` to work around a name conflict.

Closes #1933