msp430.c (msp430_expand_prologue): Return a CLOBBER rtx for naked functions.

	* config/msp430/msp430.c (msp430_expand_prologue): Return a
	CLOBBER rtx for naked functions.
	(msp430_expand_epilogue): Likewise.
	(msp430_use_f5_series_hwmult): Cache result.
	(use_32bit_hwmult): Cache result.
	(msp430_no_hwmult): New function.
	(msp430_output_labelref): Use it.

From-SVN: r215683

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bf450917a8c8813d83b46c0bb2809b466afb1ec9..3c820e942af49d5576efb72bfe192ac030f296db 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2014-09-29  Nick Clifton  <nickc@redhat.com>
+
+       * config/msp430/msp430.c (msp430_expand_prologue): Return a
+       CLOBBER rtx for naked functions.
+       (msp430_expand_epilogue): Likewise.
+       (msp430_use_f5_series_hwmult): Cache result.
+       (use_32bit_hwmult): Cache result.
+       (msp430_no_hwmult): New function.
+       (msp430_output_labelref): Use it.
+
 2014-09-29  Jakub Jelinek  <jakub@redhat.com>
 
        PR middle-end/63247
@@ -10,8 +20,8 @@
        * config/pa/pa.c (pa_output_function_epilogue): Only update
        last_address when a nonnote insn is found.
 
-2014-09-26  Jan Hubicka  <hubicka@ucw.cz>      
-       
+2014-09-26  Jan Hubicka  <hubicka@ucw.cz>
+
        PR ipa/60665
        * ipa-devirt.c (possible_polymorphic_call_targets): Silence clang warning.
 

diff --git a/gcc/config/msp430/msp430.c b/gcc/config/msp430/msp430.c
index 52195c90a7ec8951f0109cf073bbfda5cd6dd4f5..3dec9aa03414f359489716ddf6640ec3fdf3fa6f 100644 (file)
--- a/gcc/config/msp430/msp430.c
+++ b/gcc/config/msp430/msp430.c
@@ -1494,7 +1494,12 @@ msp430_expand_prologue (void)
   rtx p;
 
   if (is_naked_func ())
-    return;
+    {
+      /* We must generate some RTX as thread_prologue_and_epilogue_insns()
+        examines the output of the gen_prologue() function.  */
+      emit_insn (gen_rtx_CLOBBER (VOIDmode, GEN_INT (0)));
+      return;
+    }
 
   emit_insn (gen_prologue_start_marker ());
 
@@ -1603,7 +1608,12 @@ msp430_expand_epilogue (int is_eh)
   int helper_n = 0;
 
   if (is_naked_func ())
-    return;
+    {
+      /* We must generate some RTX as thread_prologue_and_epilogue_insns()
+        examines the output of the gen_epilogue() function.  */
+      emit_insn (gen_rtx_CLOBBER (VOIDmode, GEN_INT (0)));
+      return;
+    }
 
   if (cfun->machine->need_to_save [10])
     {
@@ -2030,20 +2040,50 @@ static const struct
   { NULL, NULL }
 };
 
-/* Returns true if the current MCU is an F5xxx series.  */
+/* Returns true if the current MCU supports an F5xxx series
+   hardware multiper.  */
+
 bool
 msp430_use_f5_series_hwmult (void)
 {
+  static const char * cached_match = NULL;
+  static bool         cached_result;
+
   if (msp430_hwmult_type == F5SERIES)
     return true;
 
   if (target_mcu == NULL || msp430_hwmult_type != AUTO)
     return false;
 
-  return strncasecmp (target_mcu, "msp430f5", 8) == 0;
+  if (target_mcu == cached_match)
+    return cached_result;
+
+  cached_match = target_mcu;
+
+  if (strncasecmp (target_mcu, "msp430f5", 8) == 0)
+    return cached_result = true;
+
+  static const char * known_f5_mult_mcus [] =
+    {
+      "cc430f5123",    "cc430f5125",   "cc430f5133",
+      "cc430f5135",    "cc430f5137",   "cc430f5143",
+      "cc430f5145",    "cc430f5147",   "cc430f6125",
+      "cc430f6126",    "cc430f6127",   "cc430f6135",
+      "cc430f6137",    "cc430f6143",   "cc430f6145",
+      "cc430f6147",    "msp430bt5190", "msp430sl5438a"
+    };
+  int i;
+
+  for (i = ARRAY_SIZE (known_f5_mult_mcus); i--;)
+    if (strcasecmp (target_mcu, known_f5_mult_mcus[i]) == 0)
+      return cached_result = true;
+
+  return cached_result = false;
 }
 
-/* Returns true id the current MCU has a second generation 32-bit hardware multiplier.  */
+/* Returns true if the current MCU has a second generation
+   32-bit hardware multiplier.  */
+
 static bool
 use_32bit_hwmult (void)
 {
@@ -2056,6 +2096,8 @@ use_32bit_hwmult (void)
       "msp430f47186",     "msp430f47196",     "msp430f47167",
       "msp430f47177",     "msp430f47187",     "msp430f47197"
     };
+  static const char * cached_match = NULL;
+  static bool         cached_result;
   int i;
 
   if (msp430_hwmult_type == LARGE)
@@ -2064,15 +2106,105 @@ use_32bit_hwmult (void)
   if (target_mcu == NULL || msp430_hwmult_type != AUTO)
     return false;
 
+  if (target_mcu == cached_match)
+    return cached_result;
+
+  cached_match = target_mcu;
   for (i = ARRAY_SIZE (known_32bit_mult_mcus); i--;)
     if (strcasecmp (target_mcu, known_32bit_mult_mcus[i]) == 0)
-      return true;
+      return cached_result = true;
 
-  return false;
+  return cached_result = false;
+}
+
+/* Returns true if the current MCU does not have a
+   hardware multiplier of any kind.  */
+
+static bool
+msp430_no_hwmult (void)
+{
+  static const char * known_nomult_mcus [] =
+    {
+      "msp430c091",    "msp430c092",   "msp430c111",
+      "msp430c1111",   "msp430c112",   "msp430c1121",
+      "msp430c1331",   "msp430c1351",  "msp430c311s",
+      "msp430c312",    "msp430c313",   "msp430c314",
+      "msp430c315",    "msp430c323",   "msp430c325",
+      "msp430c412",    "msp430c413",   "msp430e112",
+      "msp430e313",    "msp430e315",   "msp430e325",
+      "msp430f110",    "msp430f1101",  "msp430f1101a",
+      "msp430f1111",   "msp430f1111a", "msp430f112",
+      "msp430f1121",   "msp430f1121a", "msp430f1122",
+      "msp430f1132",   "msp430f122",   "msp430f1222",
+      "msp430f123",    "msp430f1232",  "msp430f133",
+      "msp430f135",    "msp430f155",   "msp430f156",
+      "msp430f157",    "msp430f2001",  "msp430f2002",
+      "msp430f2003",   "msp430f2011",  "msp430f2012",
+      "msp430f2013",   "msp430f2101",  "msp430f2111",
+      "msp430f2112",   "msp430f2121",  "msp430f2122",
+      "msp430f2131",   "msp430f2132",  "msp430f2232",
+      "msp430f2234",   "msp430f2252",  "msp430f2254",
+      "msp430f2272",   "msp430f2274",  "msp430f412",
+      "msp430f413",    "msp430f4132",  "msp430f415",
+      "msp430f4152",   "msp430f417",   "msp430f4250",
+      "msp430f4260",   "msp430f4270",  "msp430f435",
+      "msp430f4351",   "msp430f436",   "msp430f4361",
+      "msp430f437",    "msp430f4371",  "msp430f438",
+      "msp430f439",    "msp430f477",   "msp430f478",
+      "msp430f479",    "msp430fe423",  "msp430fe4232",
+      "msp430fe423a",   "msp430fe4242",        "msp430fe425",
+      "msp430fe4252",   "msp430fe425a", "msp430fe427",
+      "msp430fe4272",   "msp430fe427a", "msp430fg4250",
+      "msp430fg4260",   "msp430fg4270", "msp430fg437",
+      "msp430fg438",   "msp430fg439",  "msp430fg477",
+      "msp430fg478",   "msp430fg479",  "msp430fr2032",
+      "msp430fr2033",  "msp430fr4131", "msp430fr4132",
+      "msp430fr4133",  "msp430fw423",  "msp430fw425",
+      "msp430fw427",   "msp430fw428",  "msp430fw429",
+      "msp430g2001",   "msp430g2101",  "msp430g2102",
+      "msp430g2111",   "msp430g2112",  "msp430g2113",
+      "msp430g2121",   "msp430g2131",  "msp430g2132",
+      "msp430g2152",   "msp430g2153",  "msp430g2201",
+      "msp430g2202",   "msp430g2203",  "msp430g2210",
+      "msp430g2211",   "msp430g2212",  "msp430g2213",
+      "msp430g2221",   "msp430g2230",  "msp430g2231",
+      "msp430g2232",   "msp430g2233",  "msp430g2252",
+      "msp430g2253",   "msp430g2302",  "msp430g2303",
+      "msp430g2312",   "msp430g2313",  "msp430g2332",
+      "msp430g2333",   "msp430g2352",  "msp430g2353",
+      "msp430g2402",   "msp430g2403",  "msp430g2412",
+      "msp430g2413",   "msp430g2432",  "msp430g2433",
+      "msp430g2444",   "msp430g2452",  "msp430g2453",
+      "msp430g2513",   "msp430g2533",  "msp430g2544",
+      "msp430g2553",   "msp430g2744",  "msp430g2755",
+      "msp430g2855",   "msp430g2955",  "msp430l092",
+      "msp430p112",    "msp430p313",   "msp430p315",
+      "msp430p315s",   "msp430p325",   "msp430tch5e"
+    };
+  static const char * cached_match = NULL;
+  static bool         cached_result;
+  int i;
+
+  if (msp430_hwmult_type == NONE)
+    return true;
+
+  if (target_mcu == NULL || msp430_hwmult_type != AUTO)
+    return false;
+
+  if (target_mcu == cached_match)
+    return cached_result;
+
+  cached_match = target_mcu;
+  for (i = ARRAY_SIZE (known_nomult_mcus); i--;)
+    if (strcasecmp (target_mcu, known_nomult_mcus[i]) == 0)
+      return cached_result = true;
+
+  return cached_result = false;
 }
 
 /* This function does the same as the default, but it will replace GCC
    function names with the MSPABI-specified ones.  */
+
 void
 msp430_output_labelref (FILE *file, const char *name)
 {
@@ -2093,7 +2225,7 @@ msp430_output_labelref (FILE *file, const char *name)
        {
          if (msp430_use_f5_series_hwmult ())
            name = "__mulhi2_f5";
-         else
+         else if (! msp430_no_hwmult ())
            name = "__mulhi2";
        }
       else if (strcmp ("__mspabi_mpyl", name) == 0)
@@ -2102,7 +2234,7 @@ msp430_output_labelref (FILE *file, const char *name)
            name = "__mulsi2_f5";
          else if (use_32bit_hwmult ())
            name = "__mulsi2_hw32";
-         else
+         else if (! msp430_no_hwmult ())
            name = "__mulsi2";
        }
     }