Revert of [x64] Zero/sign-extend loads to 64-bit registers.

Revert of [x64] Zero/sign-extend loads to 64-bit registers. (patchset #1 id:20001 of https://codereview.chromium.org/2220483003/ )

Reason for revert:
Breaks tree:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug/builds/10969

Original issue's description:
> [x64] Zero/sign-extend loads to 64-bit registers.
>
> Before this change we would first load an 8/16/32-bit value from memory into a 32-bit register, then zero/sign-extend from that register to a 64-bit one. Now we replace that pattern with a single movsx/movzx.
>
> Ported from http://crrev.com/2183923003
>
> R=bmeurer@chromium.org
>
> Committed: https://crrev.com/4abecb7a27bd5fa073d0ff5fadb0c2bb248ef9f4
> Cr-Commit-Position: refs/heads/master@{#38388}

TBR=bmeurer@chromium.org,epertoso@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/0f4468b4a6ce8eeba5608e2958e6838c26d88f71
Cr-Commit-Position: refs/heads/master@{#38389}

[Michael Achenbach, 2016-08-05 14:27:08]

The CQ bit was checked by machenbach@chromium.org

[Michael Achenbach, 2016-08-05 14:27:09]

Created Revert of [x64] Zero/sign-extend loads to 64-bit registers.

[commit-bot: I haz the power, 2016-08-05 14:27:12]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-05 14:27:22]

Description was changed from

==========
Revert of [x64] Zero/sign-extend loads to 64-bit registers. (patchset #1
id:20001 of https://codereview.chromium.org/2220483003/ )

Reason for revert:
Breaks tree:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug/buil...

Original issue's description:
> [x64] Zero/sign-extend loads to 64-bit registers.
> 
> Before this change we would first load an 8/16/32-bit value from memory into a
32-bit register, then zero/sign-extend from that register to a 64-bit one. Now
we replace that pattern with a single movsx/movzx.
> 
> Ported from http://crrev.com/2183923003
> 
> R=bmeurer@chromium.org
> 
> Committed: https://crrev.com/4abecb7a27bd5fa073d0ff5fadb0c2bb248ef9f4
> Cr-Commit-Position: refs/heads/master@{#38388}

TBR=bmeurer@chromium.org,epertoso@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of [x64] Zero/sign-extend loads to 64-bit registers. (patchset #1
id:20001 of https://codereview.chromium.org/2220483003/ )

Reason for revert:
Breaks tree:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug/buil...

Original issue's description:
> [x64] Zero/sign-extend loads to 64-bit registers.
> 
> Before this change we would first load an 8/16/32-bit value from memory into a
32-bit register, then zero/sign-extend from that register to a 64-bit one. Now
we replace that pattern with a single movsx/movzx.
> 
> Ported from http://crrev.com/2183923003
> 
> R=bmeurer@chromium.org
> 
> Committed: https://crrev.com/4abecb7a27bd5fa073d0ff5fadb0c2bb248ef9f4
> Cr-Commit-Position: refs/heads/master@{#38388}

TBR=bmeurer@chromium.org,epertoso@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

[commit-bot: I haz the power, 2016-08-05 14:27:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-05 14:30:22]

Description was changed from

==========
Revert of [x64] Zero/sign-extend loads to 64-bit registers. (patchset #1
id:20001 of https://codereview.chromium.org/2220483003/ )

Reason for revert:
Breaks tree:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug/buil...

Original issue's description:
> [x64] Zero/sign-extend loads to 64-bit registers.
> 
> Before this change we would first load an 8/16/32-bit value from memory into a
32-bit register, then zero/sign-extend from that register to a 64-bit one. Now
we replace that pattern with a single movsx/movzx.
> 
> Ported from http://crrev.com/2183923003
> 
> R=bmeurer@chromium.org
> 
> Committed: https://crrev.com/4abecb7a27bd5fa073d0ff5fadb0c2bb248ef9f4
> Cr-Commit-Position: refs/heads/master@{#38388}

TBR=bmeurer@chromium.org,epertoso@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of [x64] Zero/sign-extend loads to 64-bit registers. (patchset #1
id:20001 of https://codereview.chromium.org/2220483003/ )

Reason for revert:
Breaks tree:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug/buil...

Original issue's description:
> [x64] Zero/sign-extend loads to 64-bit registers.
>
> Before this change we would first load an 8/16/32-bit value from memory into a
32-bit register, then zero/sign-extend from that register to a 64-bit one. Now
we replace that pattern with a single movsx/movzx.
>
> Ported from http://crrev.com/2183923003
>
> R=bmeurer@chromium.org
>
> Committed: https://crrev.com/4abecb7a27bd5fa073d0ff5fadb0c2bb248ef9f4
> Cr-Commit-Position: refs/heads/master@{#38388}

TBR=bmeurer@chromium.org,epertoso@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/0f4468b4a6ce8eeba5608e2958e6838c26d88f71
Cr-Commit-Position: refs/heads/master@{#38389}
==========

[commit-bot: I haz the power, 2016-08-05 14:30:23]

Patchset 1 (id:??) landed as
https://crrev.com/0f4468b4a6ce8eeba5608e2958e6838c26d88f71
Cr-Commit-Position: refs/heads/master@{#38389}