[arm] Use single instruction tail call sequence.

[arm] Use single instruction tail call sequence.

R=ulan@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=18426

[Benedikt Meurer, 2013-12-12 09:02:14]

Hey Ulan,
This is an obvious optimization, since we do not need an interworking safe tail
call for the ARM backend, as all (tail) calls to C++ code are done via the
CEntryStub or the DirectCEntryStub.
PTAL
-- Benedikt

[ulan, 2013-12-12 09:42:16]

lgtm

https://codereview.chromium.org/107813003/diff/1/src/arm/macro-assembler-arm.cc
File src/arm/macro-assembler-arm.cc (right):

https://codereview.chromium.org/107813003/diff/1/src/arm/macro-assembler-arm....
src/arm/macro-assembler-arm.cc:62: // 'target' is always generated ARM code,
never THUMB code.
Maybe assert that rmode is not external reference.

[Rodolph Perfetta, 2013-12-12 09:50:29]

https://codereview.chromium.org/107813003/diff/1/src/arm/macro-assembler-arm.cc
File src/arm/macro-assembler-arm.cc (right):

https://codereview.chromium.org/107813003/diff/1/src/arm/macro-assembler-arm....
src/arm/macro-assembler-arm.cc:62: // 'target' is always generated ARM code,
never THUMB code.
on armv5t and above this will interwork properly, no need to assert.

[Benedikt Meurer, 2013-12-12 12:23:51]

https://codereview.chromium.org/107813003/diff/1/src/arm/macro-assembler-arm.cc
File src/arm/macro-assembler-arm.cc (right):

https://codereview.chromium.org/107813003/diff/1/src/arm/macro-assembler-arm....
src/arm/macro-assembler-arm.cc:62: // 'target' is always generated ARM code,
never THUMB code.
Done.

https://codereview.chromium.org/107813003/diff/1/src/arm/macro-assembler-arm....
src/arm/macro-assembler-arm.cc:62: // 'target' is always generated ARM code,
never THUMB code.
On 2013/12/12 09:42:16, ulan wrote:
> Maybe assert that rmode is not external reference.

Done.

[Benedikt Meurer, 2014-01-02 06:11:10]

Committed patchset #2 manually as r18426 (presubmit successful).