RFR: 8282204: Use lea instructions for arithmetic operations on x86_64 [v10]
Quan Anh Mai
duke at openjdk.java.net
Fri Mar 4 08:29:40 UTC 2022
> Hi,
>
> This patch adds several matching rules for x86_64 backend to use `lea` instructions for several fused arithmetic operations. Also, `lea`s don't kill flags and allow different `dst` and `src`, so it is preferred over `sll` if possible, too.
>
> Thank you very much.
Quan Anh Mai has updated the pull request incrementally with one additional commit since the last revision:
remove unreached rules
-------------
Changes:
- all: https://git.openjdk.java.net/jdk/pull/7560/files
- new: https://git.openjdk.java.net/jdk/pull/7560/files/d171e82a..69a1afc9
Webrevs:
- full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7560&range=09
- incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7560&range=08-09
Stats: 12 lines in 1 file changed: 0 ins; 12 del; 0 mod
Patch: https://git.openjdk.java.net/jdk/pull/7560.diff
Fetch: git fetch https://git.openjdk.java.net/jdk pull/7560/head:pull/7560
PR: https://git.openjdk.java.net/jdk/pull/7560
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