MIPS64: [turbofan] Combine untagging shifts with Mul, Div and Mod.

MIPS64: [turbofan] Combine untagging shifts with Mul, Div and Mod.

TEST=unittests/InstructionSelectorTest.CombineShiftsWithMul,
     InstructionSelectorTest.CombineShiftsWithDivMod
BUG=

Committed: https://crrev.com/5d843f26a962a58e5669152f149d701819132d41
Cr-Commit-Position: refs/heads/master@{#32061}

[dusan.milosavljevic, 2015-11-16 18:29:42]

dusan.m.milosavljevic@gmail.com changed reviewers:
+ bmeurer@chromium.org, jkummerow@chromium.org, paul.lind@imgtec.com

[dusan.milosavljevic, 2015-11-16 18:29:43]

PTAL.

[dusan.milosavljevic, 2015-11-16 20:02:57]

Description was changed from

==========
MIPS64: Combine untagging shifts with Mul, Div and Mod.

TEST=unittests/InstructionSelectorTest.CombineShiftsWithMul,
     InstructionSelectorTest.CombineShiftsWithDivMod
BUG=
==========

to

==========
MIPS64: [turbofan] Combine untagging shifts with Mul, Div and Mod.

TEST=unittests/InstructionSelectorTest.CombineShiftsWithMul,
     InstructionSelectorTest.CombineShiftsWithDivMod
BUG=
==========

[paul.l..., 2015-11-17 21:32:00]

LGTM.

[dusan.milosavljevic, 2015-11-17 22:35:14]

The CQ bit was checked by dusan.m.milosavljevic@gmail.com

[commit-bot: I haz the power, 2015-11-17 22:35:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1444423002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1444423002/1

[commit-bot: I haz the power, 2015-11-17 22:52:29]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-17 22:53:01]

Patchset 1 (id:??) landed as
https://crrev.com/5d843f26a962a58e5669152f149d701819132d41
Cr-Commit-Position: refs/heads/master@{#32061}