Add casts for legitimate integer to enum conversions

This patch is mostly extracted from Pedro's C++ branch.  It adds explicit
casts from integer to enum types, where it is really the intention to do
so.  This could be because we are ...

 * iterating on enum values (we need to iterate on an equivalent integer)
 * converting from a value read from bytes (dwarf attribute, agent
 expression opcode) to the equivalent enum
 * reading the equivalent integer value from another language (Python/Guile)

An exception to that is the casts in regcache.c.  It seems to me like
struct regcache's register_status field could be a pointer to an array of
enum register_status.  Doing so would waste a bit of memory (4 bytes
used by the enum vs 1 byte used by the current signed char, for each
register).  If we switch to C++11 one day, we can define the underlying
type of an enum type, so we could have the best of both worlds.

gdb/ChangeLog:

	* arm-tdep.c (set_fp_model_sfunc): Add cast from integer to enum.
	(arm_set_abi): Likewise.
	* ax-general.c (ax_print): Likewise.
	* c-exp.y (exp : string_exp): Likewise.
	* compile/compile-loc2c.c (compute_stack_depth_worker): Likewise.
	(do_compile_dwarf_expr_to_c): Likewise.
	* cp-name-parser.y (demangler_special : DEMANGLER_SPECIAL start):
	Likewise.
	* dwarf2expr.c (execute_stack_op): Likewise.
	* dwarf2loc.c (dwarf2_compile_expr_to_ax): Likewise.
	(disassemble_dwarf_expression): Likewise.
	* dwarf2read.c (dwarf2_add_member_fn): Likewise.
	(read_array_order): Likewise.
	(abbrev_table_read_table): Likewise.
	(read_attribute_value): Likewise.
	(skip_unknown_opcode): Likewise.
	(dwarf_decode_macro_bytes): Likewise.
	(dwarf_decode_macros): Likewise.
	* eval.c (value_f90_subarray): Likewise.
	* guile/scm-param.c (gdbscm_make_parameter): Likewise.
	* i386-linux-tdep.c (i386_canonicalize_syscall): Likewise.
	* infrun.c (handle_command): Likewise.
	* memory-map.c (memory_map_start_memory): Likewise.
	* osabi.c (set_osabi): Likewise.
	* parse.c (operator_length_standard): Likewise.
	* ppc-linux-tdep.c (ppc_canonicalize_syscall): Likewise, and use
	single return point.
	* python/py-frame.c (gdbpy_frame_stop_reason_string): Likewise.
	* python/py-symbol.c (gdbpy_lookup_symbol): Likewise.
	(gdbpy_lookup_global_symbol): Likewise.
	* record-full.c (record_full_restore): Likewise.
	* regcache.c (regcache_register_status): Likewise.
	(regcache_raw_read): Likewise.
	(regcache_cooked_read): Likewise.
	* rs6000-tdep.c (powerpc_set_vector_abi): Likewise.
	* symtab.c (initialize_ordinary_address_classes): Likewise.
	* target-debug.h (target_debug_print_signals): Likewise.
	* utils.c (do_restore_current_language): Likewise.

2 files changed, 4 insertions, 3 deletions

diff --git a/gdb/python/py-frame.c b/gdb/python/py-frame.c
index 7290056..7e5dd17 100644
--- a/gdb/python/py-frame.c
+++ b/gdb/python/py-frame.c
@@ -666,7 +666,7 @@ gdbpy_frame_stop_reason_string (PyObject *self, PyObject *args)
       return NULL;
     }
 
-  str = unwind_stop_reason_to_string (reason);
+  str = unwind_stop_reason_to_string ((enum unwind_stop_reason) reason);
   return PyUnicode_Decode (str, strlen (str), host_charset (), NULL);
 }
 
diff --git a/gdb/python/py-symbol.c b/gdb/python/py-symbol.c
index 401e7e9..f6466bd 100644
--- a/gdb/python/py-symbol.c
+++ b/gdb/python/py-symbol.c
@@ -396,7 +396,8 @@ gdbpy_lookup_symbol (PyObject *self, PyObject *args, PyObject *kw)
 
   TRY
     {
-      symbol = lookup_symbol (name, block, domain, &is_a_field_of_this).symbol;
+      symbol = lookup_symbol (name, block, (domain_enum) domain,
+			      &is_a_field_of_this).symbol;
     }
   CATCH (except, RETURN_MASK_ALL)
     {
@@ -449,7 +450,7 @@ gdbpy_lookup_global_symbol (PyObject *self, PyObject *args, PyObject *kw)
 
   TRY
     {
-      symbol = lookup_global_symbol (name, NULL, domain).symbol;
+      symbol = lookup_global_symbol (name, NULL, (domain_enum) domain).symbol;
     }
   CATCH (except, RETURN_MASK_ALL)
     {