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Introduce a generic vector operands (vec and legVec) and migrate existing usages of fixed-sized vector operands (vec[SDXYZ]) to generic ones

blocks

JDK-8230015 [instruction selector] generic vector operands support.

is blocked by

JDK-8234387 C2: Better support of operands with multiple match rules in AD files

JDK-8234394 C2: Dynamic register class support in ADLC

relates to

JDK-8236443 Issues with specializing vector register type for phi operand with generic operands

JDK-8236364 TEMP vector registers could be incorrectly assigned upper bank xmm registers after Generic Operands (JDK-8234391)