[turbofan] Optimize truncated safe integer multiplications.

[turbofan] Optimize truncated safe integer multiplications.

For a * b with only truncated word32 uses (or result known to be in
signed32 range), we can use Int32Mul if we know for sure that the
intermediate result is inside the safe integer range, and a and b are
in signed32 range.

Drive-by-fix: Also use TypeCache in SimplifiedLowering.

R=jarin@chromium.org

Committed: https://crrev.com/b5d50296ede3cae2bc2a7b6b8602ad1c92565977
Cr-Commit-Position: refs/heads/master@{#32330}

[Benedikt Meurer, 2015-11-26 10:27:25]

Jaro: PTAL
Fedor: FYI

[Jarin, 2015-11-26 10:43:03]

lgtm. Nice!

[Benedikt Meurer, 2015-11-26 10:51:42]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-11-26 10:51:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1478953002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1478953002/1

[Benedikt Meurer, 2015-11-26 10:51:57]

Description was changed from

==========
[turbofan] Optimize truncated safe integer multiplications.

When a * b with only truncated word32 uses (or result known to be in
signed32 range), we can use Int32Mul if we know for sure that the
intermediate result is inside the safe integer range, and a and b are
in signed32 range.

Drive-by-fix: Also use TypeCache in SimplifiedLowering.

R=jarin@chromium.org
==========

to

==========
[turbofan] Optimize truncated safe integer multiplications.

For a * b with only truncated word32 uses (or result known to be in
signed32 range), we can use Int32Mul if we know for sure that the
intermediate result is inside the safe integer range, and a and b are
in signed32 range.

Drive-by-fix: Also use TypeCache in SimplifiedLowering.

R=jarin@chromium.org
==========

[commit-bot: I haz the power, 2015-11-26 11:01:05]

Description was changed from

==========
[turbofan] Optimize truncated safe integer multiplications.

For a * b with only truncated word32 uses (or result known to be in
signed32 range), we can use Int32Mul if we know for sure that the
intermediate result is inside the safe integer range, and a and b are
in signed32 range.

Drive-by-fix: Also use TypeCache in SimplifiedLowering.

R=jarin@chromium.org
==========

to

==========
[turbofan] Optimize truncated safe integer multiplications.

For a * b with only truncated word32 uses (or result known to be in
signed32 range), we can use Int32Mul if we know for sure that the
intermediate result is inside the safe integer range, and a and b are
in signed32 range.

Drive-by-fix: Also use TypeCache in SimplifiedLowering.

R=jarin@chromium.org
==========

[commit-bot: I haz the power, 2015-11-26 11:01:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-26 11:01:51]

Description was changed from

==========
[turbofan] Optimize truncated safe integer multiplications.

For a * b with only truncated word32 uses (or result known to be in
signed32 range), we can use Int32Mul if we know for sure that the
intermediate result is inside the safe integer range, and a and b are
in signed32 range.

Drive-by-fix: Also use TypeCache in SimplifiedLowering.

R=jarin@chromium.org
==========

to

==========
[turbofan] Optimize truncated safe integer multiplications.

For a * b with only truncated word32 uses (or result known to be in
signed32 range), we can use Int32Mul if we know for sure that the
intermediate result is inside the safe integer range, and a and b are
in signed32 range.

Drive-by-fix: Also use TypeCache in SimplifiedLowering.

R=jarin@chromium.org

Committed: https://crrev.com/b5d50296ede3cae2bc2a7b6b8602ad1c92565977
Cr-Commit-Position: refs/heads/master@{#32330}
==========

[commit-bot: I haz the power, 2015-11-26 11:01:51]

Patchset 1 (id:??) landed as
https://crrev.com/b5d50296ede3cae2bc2a7b6b8602ad1c92565977
Cr-Commit-Position: refs/heads/master@{#32330}