Sync down FSF r184235@google/gcc-4_6_2-mobile branch

1) Get mostly new patches from FSF gcc-4.6 branch
2) Fix PR52129
3) Insert GNU-stack note for all ARM targets

Change-Id: I2b9926981210e517e4021242908074319a91d6bd

1 files changed, 17 insertions, 0 deletions

diff --git a/gcc-4.6/gcc/config/m68k/m68k.c b/gcc-4.6/gcc/config/m68k/m68k.c
index b8e9ff266..e5bd0119a 100644
--- a/gcc-4.6/gcc/config/m68k/m68k.c
+++ b/gcc-4.6/gcc/config/m68k/m68k.c
@@ -136,6 +136,7 @@ static void m68k_conditional_register_usage (void);
 static bool m68k_legitimate_address_p (enum machine_mode, rtx, bool);
 static bool m68k_handle_option (size_t, const char *, int);
 static void m68k_option_override (void);
+static void m68k_override_options_after_change (void);
 static rtx find_addr_reg (rtx);
 static const char *singlemove_string (rtx *);
 static void m68k_output_mi_thunk (FILE *, tree, HOST_WIDE_INT,
@@ -241,6 +242,9 @@ const char *m68k_library_id_string = "_current_shared_library_a5_offset_";
 #undef TARGET_OPTION_OVERRIDE
 #define TARGET_OPTION_OVERRIDE m68k_option_override
 
+#undef TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE
+#define TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE m68k_override_options_after_change
+
 #undef TARGET_RTX_COSTS
 #define TARGET_RTX_COSTS m68k_rtx_costs
 
@@ -756,6 +760,19 @@ m68k_option_override (void)
     }
 }
 
+/* Implement TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE.  */
+
+static void
+m68k_override_options_after_change (void)
+{
+  if (m68k_sched_cpu == CPU_UNKNOWN)
+    {
+      flag_schedule_insns = 0;
+      flag_schedule_insns_after_reload = 0;
+      flag_modulo_sched = 0;
+    }
+}
+
 /* Generate a macro of the form __mPREFIX_cpu_NAME, where PREFIX is the
    given argument and NAME is the argument passed to -mcpu.  Return NULL
    if -mcpu was not passed.  */