JIT: Optimize *x = dblCns to *x = intCns for arm64

[EgorBo]

Yet another up-for-grabs:

void foo(float* x) => *x = 0;

emits:

            movi    v16.16b, #0x00
            str     s16, [x1]

while could be just:

            str     wzr, [x1]

The issue is basically to port these changes #52298 to ARM64 or better - move them to lower.cpp and share between both x86 and arm.

[ghost]

Tagging subscribers to this area: @JulieLeeMSFT
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Issue Details

---

Yet another up-for-grabs:

void foo(float* x) => *x = 0;

emits:

            movi    v16.16b, #0x00
            str     s16, [x1]

while could be just:

            str     wzr, [x1]

The issue is basically to port these changes #52298 to ARM64 or better - move them to lower.cpp and share between both x86 and arm.

Author:	EgorBo
Assignees:	-
Labels:	tenet-performance, area-CodeGen-coreclr, untriaged
Milestone:	-

[ghost]

Tagging subscribers to this area: @JulieLeeMSFT
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Yet another up-for-grabs:

void foo(float* x) => *x = 0;

emits:

            movi    v16.16b, #0x00
            str     s16, [x1]

while could be just:

            str     wzr, [x1]

The issue is basically to port these changes #52298 to ARM64 or better - move them to lower.cpp and share between both x86 and arm.

Author:	EgorBo
Assignees:	-
Labels:	easy, tenet-performance, up-for-grabs, area-CodeGen-coreclr
Milestone:	Future

[SeanWoo]

A good task to start with. I did this and posted a PR. #61847

[EgorBo]

Closed by #61847 👍