diff options
Diffstat (limited to 'gcc/calls.c')
-rw-r--r-- | gcc/calls.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/calls.c b/gcc/calls.c index 06b8485ff7f..7f55aafa734 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -1304,6 +1304,16 @@ initialize_argument_information (int num_actuals ATTRIBUTE_UNUSED, && TREE_CODE (base) != SSA_NAME && (!DECL_P (base) || MEM_P (DECL_RTL (base))))) { + /* Argument setup code may have copied the value to register. We + revert that optimization now because the tail call code must + use the original location. */ + if (TREE_CODE (args[i].tree_value) == PARM_DECL + && !MEM_P (DECL_RTL (args[i].tree_value)) + && DECL_INCOMING_RTL (args[i].tree_value) + && MEM_P (DECL_INCOMING_RTL (args[i].tree_value))) + set_decl_rtl (args[i].tree_value, + DECL_INCOMING_RTL (args[i].tree_value)); + mark_addressable (args[i].tree_value); /* We can't use sibcalls if a callee-copied argument is |