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JIT: optimize x64 integer-extension widths - #133882

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benaadams wants to merge 4 commits into

dotnet:mainfrom

benaadams:jit/split-integer-extensions

Commits on Sep 14, 2026
- JIT: optimize x64 integer-extension widths
  benaadams
  committed
  13d9337
- JIT: track movsx destination width in emitter metadata
  benaadams
  committed
  eb565c1
- JIT: select native sign extension only for reusable widenings
  benaadams
  committed
  fe19804
- JIT: enforce AMD64-only movsx destination flags
  benaadams
  committed
  de512f6