[PATCH] D107794: [AArch64ISelLowering] Avoid sinking mul's ops in some cases

[guopeilin via Phabricator via llvm-commits]

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D91271 <https://reviews.llvm.org/D91271> attempts to sink multiply's operands to the same block,
however, in some cases, some multiply's operands may already
in the same block, thus we cannot sink other operands otherwise
invalid IRs that definitions not strictly dominate uses
would be generated


https://reviews.llvm.org/D107794

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/avoid-sinking-mul-ops.ll

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