[MLIR][LLVM] Fix import of dso_local attribute (#124822)

The import of LLVM IR should use is isDSOLocal instead of
hasLocalLinkage to set the dso_local attribute.
Without this change, function definitions that mostly have external
linkage would be missing dso_local attribute during translation.

---------

Co-authored-by: Tobias Gysi <[email protected]>

Author: ghehg

mlir/lib/Target/LLVMIR/ModuleImport.cpp

@@ -2139,7 +2139,7 @@ LogicalResult ModuleImport::processFunction(llvm::Function *func) {
       iface.isConvertibleIntrinsic(func->getIntrinsicID()))
     return success();
 
-  bool dsoLocal = func->hasLocalLinkage();
+  bool dsoLocal = func->isDSOLocal();
   CConv cconv = convertCConvFromLLVM(func->getCallingConv());
 
   // Insert the function at the end of the module.

mlir/test/Target/LLVMIR/Import/function-attributes.ll

@@ -12,6 +12,15 @@ define internal spir_func void @spir_func_internal() {
 
 ; // -----
 
+; Ensure that we have dso_local.
+; CHECK: llvm.func @dsolocal_func()
+; CHECK-SAME: attributes {dso_local}
+define dso_local void @dsolocal_func() {
+  ret void
+}
+
+; // -----
+
 ; CHECK-LABEL: @func_readnone
 ; CHECK-SAME:  attributes {memory_effects = #llvm.memory_effects<other = none, argMem = none, inaccessibleMem = none>}
 ; CHECK:   llvm.return