[llvm] [RISCV] Add a pass to eliminate special copies in order to facilitate shrink-wrap optimization (PR #140716)

[Craig Topper via llvm-commits]

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@@ -35,6 +35,7 @@ add_llvm_target(RISCVCodeGen
   RISCVCodeGenPrepare.cpp
   RISCVConstantPoolValue.cpp
   RISCVDeadRegisterDefinitions.cpp
+  RISCVCopyCombine.cpp
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topperc wrote:

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https://github.com/llvm/llvm-project/pull/140716