silencing gcc false positive warning, rebased

Author: fschlimb

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

@@ -2849,7 +2849,7 @@ void AsmPrinter::emitJumpTableSizesSection(const MachineJumpTableInfo *MJTI,
 
   if (isElf) {
     MCSymbolELF *LinkedToSym = dyn_cast<MCSymbolELF>(CurrentFnSym);
-    int Flags = F.hasComdat() ? ELF::SHF_GROUP : 0;
+    int Flags = F.hasComdat() ? (int)ELF::SHF_GROUP : 0;
 
     JumpTableSizesSection = OutContext.getELFSection(
         sectionName, ELF::SHT_LLVM_JT_SIZES, Flags, 0, GroupName, F.hasComdat(),

mlir/CMakeLists.txt

@@ -84,13 +84,20 @@ check_c_compiler_flag("-Werror=mismatched-tags" C_SUPPORTS_WERROR_MISMATCHED_TAG
 append_if(C_SUPPORTS_WERROR_MISMATCHED_TAGS "-Werror=mismatched-tags" CMAKE_C_FLAGS)
 append_if(C_SUPPORTS_WERROR_MISMATCHED_TAGS "-Werror=mismatched-tags" CMAKE_CXX_FLAGS)
 
-# Silence a false positive GCC -Wunused-but-set-parameter warning in constexpr
-# cases, by marking SelectedCase as used. See
-# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85827 for details. The issue is
-# fixed in GCC 10.
-if(CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS "14.0")
-  check_cxx_compiler_flag("-Wno-unused-but-set-parameter" CXX_SUPPORTS_WNO_UNUSED_BUT_SET_PARAMETER)
-  append_if(CXX_SUPPORTS_WNO_UNUSED_BUT_SET_PARAMETER "-Wno-unused-but-set-parameter" CMAKE_CXX_FLAGS)
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+  # Silence a false positive GCC -Wunused-but-set-parameter warning in
+  # constexpr cases. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85827
+  # for details
+  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "14.0")
+    check_cxx_compiler_flag("-Wno-unused-but-set-parameter" CXX_SUPPORTS_WNO_UNUSED_BUT_SET_PARAMETER)
+    append_if(CXX_SUPPORTS_WNO_UNUSED_BUT_SET_PARAMETER "-Wno-unused-but-set-parameter" CMAKE_CXX_FLAGS)
+  endif()
+  # Silence a false positive GCC -Wdeprecated-copy warning in cases where
+  # a copy operator is defined through "using" a base class copy operator.
+  if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "12.0")
+    check_cxx_compiler_flag("-Wno-deprecated-copy" CXX_SUPPORTS_WNO_DEPRECTAED_COPY)
+    append_if(CXX_SUPPORTS_WNO_DEPRECTAED_COPY "-Wno-deprecated-copy" CMAKE_CXX_FLAGS)
+  endif()
 endif()
 
 # Installing the headers and docs needs to depend on generating any public

mlir/include/mlir/Pass/Pass.h

@@ -94,7 +94,6 @@ class Pass {
     Option(Pass &parent, StringRef arg, Args &&...args)
         : detail::PassOptions::Option<DataType, OptionParser>(
               parent.passOptions, arg, std::forward<Args>(args)...) {}
-    Option &operator=(const Option &other) = default; // gcc11 -Wdeprecated-copy
     using detail::PassOptions::Option<DataType, OptionParser>::operator=;
   };
   /// This class represents a specific pass option that contains a list of