8361403: [VectorAPI] Missing Identity transforms for vector MUL, ADD, SUB operations

[jatin-bhateja]

Patch adds following identity and ideal transformation for vector MUL, ADD and SUB node generated through vector API flow.

• X + 0 => X
• X * 1 => X
• X – 0 => X
• X – X => 0
• X * 0 => 0

Also included an extensive IR verification test with both predicated and non-predicated vector operation test points.

Kindly review and share your feedback.

Best Regards,
Jatin

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Issue

• JDK-8361403: [VectorAPI] Missing Identity transforms for vector MUL, ADD, SUB operations (Enhancement - P4)

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[jatin-bhateja]

/label add hotspot-compiler-dev

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