[PATCH] D137778: [GlobalISel] Correct constant type in matchReassocConstantInnerLHS

[chenglin.bi via Phabricator via llvm-commits]

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When we match a pattern from m_GCst, the register type could be different from original op. So we can't replace the original op to vreg direct.
This code create a new constant with original op type then replace the original op.

Fix #58906


https://reviews.llvm.org/D137778

Files:
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-ptradd-chain.mir

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