Merge pull request #18902 from atrick/copyprop

CopyPropagation for SILValues with ownership.

Author: atrick

include/swift/SILOptimizer/PassManager/Passes.def

@@ -108,6 +108,8 @@ PASS(ConditionForwarding, "condition-forwarding",
      "Conditional Branch Forwarding to Fold SIL switch_enum")
 PASS(CopyForwarding, "copy-forwarding",
      "Copy Forwarding to Remove Redundant Copies")
+PASS(CopyPropagation, "copy-propagation",
+     "Copy propagation to Remove Redundant SSA Copies")
 PASS(EpilogueARCMatcherDumper, "sil-epilogue-arc-dumper",
      "Print Epilogue retains of Returned Values and Argument releases")
 PASS(EpilogueRetainReleaseMatcherDumper, "sil-epilogue-retain-release-dumper",

lib/SILOptimizer/Transforms/CMakeLists.txt

@@ -9,6 +9,7 @@ silopt_register_sources(
   CSE.cpp
   ConditionForwarding.cpp
   CopyForwarding.cpp
+  CopyPropagation.cpp
   DeadCodeElimination.cpp
   DeadObjectElimination.cpp
   DeadStoreElimination.cpp