[LLVM][CMake][MSVC] Install PDBs alongside executables

Author: mayanez

llvm/cmake/modules/AddLLVM.cmake

@@ -1489,6 +1489,11 @@ macro(llvm_add_tool project name)
                 ${export_to_llvmexports}
                 RUNTIME DESTINATION ${${project}_TOOLS_INSTALL_DIR}
                 COMPONENT ${name})
+        if (MSVC)
+          install(FILES $<TARGET_PDB_FILE:${name}> 
+                DESTINATION "${${project}_TOOLS_INSTALL_DIR}" COMPONENT ${name} 
+                OPTIONAL)
+        endif()
 
         if (NOT LLVM_ENABLE_IDE)
           add_llvm_install_targets(install-${name}
@@ -1519,6 +1524,11 @@ macro(add_llvm_example name)
   add_llvm_executable(${name} EXPORT_SYMBOLS ${ARGN})
   if( LLVM_BUILD_EXAMPLES )
     install(TARGETS ${name} RUNTIME DESTINATION "${LLVM_EXAMPLES_INSTALL_DIR}")
+    if (MSVC)
+      install(FILES $<TARGET_PDB_FILE:${name}> 
+              DESTINATION "${LLVM_EXAMPLES_INSTALL_DIR}" COMPONENT ${name} 
+              OPTIONAL)
+    endif()
   endif()
   get_subproject_title(subproject_title)
   set_target_properties(${name} PROPERTIES FOLDER "${subproject_title}/Examples")
@@ -1553,6 +1563,11 @@ macro(add_llvm_utility name)
               ${export_to_llvmexports}
               RUNTIME DESTINATION ${LLVM_UTILS_INSTALL_DIR}
               COMPONENT ${name})
+      if (MSVC)
+        install(FILES $<TARGET_PDB_FILE:${name}> 
+                DESTINATION "${LLVM_UTILS_INSTALL_DIR}" COMPONENT ${name} 
+                OPTIONAL)
+      endif()
 
       if (NOT LLVM_ENABLE_IDE)
         add_llvm_install_targets(install-${name}