[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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@@ -455,6 +456,7 @@ bool RISCVPassConfig::addRegAssignAndRewriteFast() {
   if (TM->getOptLevel() != CodeGenOptLevel::None &&
       EnableRISCVDeadRegisterElimination)
     addPass(createRISCVDeadRegisterDefinitionsPass());
+
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topperc wrote:

Unrelated change

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