[PATCH] D112395: [AMDGPU] Enable 48-bit mul in AMDGPUCodeGenPrepare.

[Abinav Puthan Purayil via Phabricator via llvm-commits]

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We were bailing out of creating 24-bit muls for results wider than 32
bits in AMDGPUCodeGenPrepare. With the 24-bit mulhi intrinsic, this
change teaches AMDGPUCodeGenPrepare to generate the 48-bit mul
correctly.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D112395

Files:
  llvm/lib/Target/AMDGPU/AMDGPUCodeGenPrepare.cpp
  llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-mul24.ll

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