[mlir] Add test

Author: Luohaothu

mlir/test/Conversion/MemRefToLLVM/issue-120950.mlir

@@ -0,0 +1,11 @@
+// RUN: mlir-opt %s -finalize-memref-to-llvm 2>&1 | FileCheck %s
+
+#map = affine_map<(d0) -> (d0 + 1)>
+module {
+  // CHECK: redefinition of reserved function 'malloc' of different type '!llvm.func<void (i64)>' is prohibited
+  llvm.func @malloc(i64)
+  func.func @issue_120950() {
+    %alloc = memref.alloc() : memref<1024x64xf32, 1>
+    llvm.return
+  }
+}