[PATCH] D120452: [AArch64] Use simd mov to initialise big const float immediate

[Allen zhong via Phabricator via llvm-commits]

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mov w8, #1325400064 + fmov s0, w8 ==> movi v0.2s, 0x4f, lsl 24


https://reviews.llvm.org/D120452

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/test/Transforms/LoopVectorize/AArch64/remat-const-float-simd.ll

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