This will allow the compiler to crunch Prog lists down to code as each
function is compiled, instead of waiting until the end, which should
reduce the working set of the compiler. But not until Go 1.7.

This also makes it easier to write some machine code output tests
for the assembler, which is why it's being done now.

For #13822.

Change-Id: I0811123bc6e5717cebb8948f9cea18e1b9baf6f7
Reviewed-on: https://go-review.googlesource.com/18311
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Instead of two parallel files that look almost identical,
mark the expected differences in the original file.

The annotations being added here keep the tests passing,
but they also make clear a number of printing or parsing
errors that were not as easily seen when the data was
split across two files.

Fix a few diagnostic problems in cmd/internal/obj as well.

A step toward #13822.

Change-Id: I997172681ea6fa7da915ff0f0ab93d2b76f8dce2
Reviewed-on: https://go-review.googlesource.com/18823
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Not much testing yet, but the test now exists.

Another step toward #13822.

Change-Id: Idb2b06bf53a6113c83008150b4c0b631bb195279
Reviewed-on: https://go-review.googlesource.com/18844
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>

Generated by x86test, from https://golang.org/cl/18842
(still in progress).

The commented out lines are either missing or misspelled
or incorrectly handled instructions.

For #4816, #8037, #13822, #14068, #14069.

Change-Id: If309310c97d9d2a3c71fc64c51d4a957e9076ab7
Reviewed-on: https://go-review.googlesource.com/18850
Reviewed-by: Rob Pike <r@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Was part of #13822 but not in the first message, so I missed it.

Fixes #13822 again.

Change-Id: I775004fa8d47b6af293124605521ec396573e267
Reviewed-on: https://go-review.googlesource.com/18900
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>