Remove useless register keywords

This patch removes useless register keywords from several backends and one
spot in the Ada FE.

2021-05-26  Jakub Jelinek  <jakub@redhat.com>

gcc/
	* config/epiphany/epiphany.c (epiphany_print_operand_address): Remove
	register keywords.
	* config/microblaze/microblaze.c (microblaze_legitimize_address,
	call_internal1,
	microblaze_option_override, print_operand): Likewise.
	* config/microblaze/microblaze.md (call_internal_plt,
	call_value_intern_plt, call_value_intern): Likewise.
	* config/arm/aout.h (ASM_OUTPUT_ALIGN): Likewise.
	* config/iq2000/iq2000.md (call_internal1, call_value_internal1,
	call_value_multiple_internal1): Likewise.
	* config/bfin/bfin.c (symbolic_reference_mentioned_p): Likewise.
gcc/ada/
	* init.c (__gnat_error_handler): Remove register keyword.

7 files changed, 32 insertions, 30 deletions

diff --git a/gcc/ada/init.c b/gcc/ada/init.c
index 08ff8d7..c48e244 100644
--- a/gcc/ada/init.c
+++ b/gcc/ada/init.c
@@ -1989,7 +1989,7 @@ __gnat_error_handler (int sig, siginfo_t *si, void *sc)
      anything else.
      This mechanism is only need in kernel mode. */
 #if !(defined (__RTP__) || defined (VTHREADS)) && ((CPU == PPCE500V2) || (CPU == PPC85XX))
-  register unsigned msr;
+  unsigned msr;
   /* Read the MSR value */
   asm volatile ("mfmsr %0" : "=r" (msr));
   /* Force the SPE bit if not set.  */
diff --git a/gcc/config/arm/aout.h b/gcc/config/arm/aout.h
index 9688fb6..25a2812 100644
--- a/gcc/config/arm/aout.h
+++ b/gcc/config/arm/aout.h
@@ -257,7 +257,7 @@
 #define ASM_OUTPUT_ALIGN(STREAM, POWER)			\
   do							\
     {							\
-      register int amount = 1 << (POWER);		\
+      int amount = 1 << (POWER);			\
 							\
       if (amount == 2)					\
 	fprintf (STREAM, "\t.even\n");			\
diff --git a/gcc/config/bfin/bfin.c b/gcc/config/bfin/bfin.c
index a000b7a..698dd87 100644
--- a/gcc/config/bfin/bfin.c
+++ b/gcc/config/bfin/bfin.c
@@ -1773,8 +1773,8 @@ function_arg_regno_p (int n)
 int
 symbolic_reference_mentioned_p (rtx op)
 {
-  register const char *fmt;
-  register int i;
+  const char *fmt;
+  int i;
 
   if (GET_CODE (op) == SYMBOL_REF || GET_CODE (op) == LABEL_REF)
     return 1;
@@ -1784,7 +1784,7 @@ symbolic_reference_mentioned_p (rtx op)
     {
       if (fmt[i] == 'E')
 	{
-	  register int j;
+	  int j;
 
 	  for (j = XVECLEN (op, i) - 1; j >= 0; j--)
 	    if (symbolic_reference_mentioned_p (XVECEXP (op, i, j)))
diff --git a/gcc/config/epiphany/epiphany.c b/gcc/config/epiphany/epiphany.c
index b60daa7..f248294 100644
--- a/gcc/config/epiphany/epiphany.c
+++ b/gcc/config/epiphany/epiphany.c
@@ -1394,7 +1394,7 @@ epiphany_print_operand (FILE *file, rtx x, int code)
 static void
 epiphany_print_operand_address (FILE *file, machine_mode /*mode*/, rtx addr)
 {
-  register rtx base, index = 0;
+  rtx base, index = 0;
   int offset = 0;
 
   switch (GET_CODE (addr))
diff --git a/gcc/config/iq2000/iq2000.md b/gcc/config/iq2000/iq2000.md
index fd25e05..4637703 100644
--- a/gcc/config/iq2000/iq2000.md
+++ b/gcc/config/iq2000/iq2000.md
@@ -1553,7 +1553,7 @@
   ""
   "*
 {
-  register rtx target = operands[0];
+  rtx target = operands[0];
 
   if (GET_CODE (target) == CONST_INT)
     return \"li\\t%@,%0\\n\\tjalr\\t%2,%@\";
@@ -1641,7 +1641,7 @@
   ""
   "*
 {
-  register rtx target = operands[1];
+  rtx target = operands[1];
 
   if (GET_CODE (target) == CONST_INT)
     return \"li\\t%@,%1\\n\\tjalr\\t%3,%@\";
@@ -1678,7 +1678,7 @@
   ""
   "*
 {
-  register rtx target = operands[1];
+  rtx target = operands[1];
 
   if (GET_CODE (target) == CONST_INT)
     return \"li\\t%@,%1\\n\\tjalr\\t%4,%@\";
diff --git a/gcc/config/microblaze/microblaze.c b/gcc/config/microblaze/microblaze.c
index b444db1..6e8f367 100644
--- a/gcc/config/microblaze/microblaze.c
+++ b/gcc/config/microblaze/microblaze.c
@@ -991,7 +991,7 @@ static rtx
 microblaze_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED,
 			       machine_mode mode ATTRIBUTE_UNUSED)
 {
-  register rtx xinsn = x, result;
+  rtx xinsn = x, result;
 
   if (GET_CODE (xinsn) == CONST
       && flag_pic && pic_address_needs_scratch (xinsn))
@@ -1011,10 +1011,10 @@ microblaze_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED,
 
   if (GET_CODE (xinsn) == PLUS)
     {
-      register rtx xplus0 = XEXP (xinsn, 0);
-      register rtx xplus1 = XEXP (xinsn, 1);
-      register enum rtx_code code0 = GET_CODE (xplus0);
-      register enum rtx_code code1 = GET_CODE (xplus1);
+      rtx xplus0 = XEXP (xinsn, 0);
+      rtx xplus1 = XEXP (xinsn, 1);
+      enum rtx_code code0 = GET_CODE (xplus0);
+      enum rtx_code code1 = GET_CODE (xplus1);
 
       if (code0 != REG && code1 == REG)
 	{
@@ -1736,9 +1736,9 @@ microblaze_version_to_int (const char *version)
 static void
 microblaze_option_override (void)
 {
-  register int i, start;
-  register int regno;
-  register machine_mode mode;
+  int i, start;
+  int regno;
+  machine_mode mode;
   int ver;
 
   microblaze_section_threshold = (global_options_set.x_g_switch_value
@@ -1891,11 +1891,11 @@ microblaze_option_override (void)
   for (mode = VOIDmode;
        mode != MAX_MACHINE_MODE; mode = (machine_mode) ((int) mode + 1))
     {
-      register int size = GET_MODE_SIZE (mode);
+      int size = GET_MODE_SIZE (mode);
 
       for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
 	{
-	  register int ok;
+	  int ok;
 
 	  if (mode == CCmode)
 	    {
@@ -2267,7 +2267,7 @@ microblaze_initial_elimination_offset (int from, int to)
 void
 print_operand (FILE * file, rtx op, int letter)
 {
-  register enum rtx_code code;
+  enum rtx_code code;
 
   if (PRINT_OPERAND_PUNCT_VALID_P (letter))
     {
@@ -2406,7 +2406,7 @@ print_operand (FILE * file, rtx op, int letter)
 
   else if (code == REG || code == SUBREG)
     {
-      register int regnum;
+      int regnum;
 
       if (code == REG)
 	regnum = REGNO (op);
@@ -2431,7 +2431,7 @@ print_operand (FILE * file, rtx op, int letter)
         rtx mem_reg = XEXP (op, 0);
         if (GET_CODE (mem_reg) == REG)
         {
-            register int regnum = REGNO (mem_reg);
+            int regnum = REGNO (mem_reg);
             fprintf (file, "%s", reg_names[regnum]);
         }
       }
diff --git a/gcc/config/microblaze/microblaze.md b/gcc/config/microblaze/microblaze.md
index 472ef4c..6d77752 100644
--- a/gcc/config/microblaze/microblaze.md
+++ b/gcc/config/microblaze/microblaze.md
@@ -2107,8 +2107,8 @@
   (use (reg:SI R_GOT))]
   "flag_pic"
   {
-    register rtx target2 = gen_rtx_REG (Pmode, 
-			      GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM);
+    rtx target2
+      = gen_rtx_REG (Pmode, GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM);
     gen_rtx_CLOBBER (VOIDmode, target2);
     return "brlid\tr15,%0\;%#";
   }
@@ -2122,9 +2122,9 @@
   (clobber (reg:SI R_SR))]
   ""
   {
-    register rtx target = operands[0];
-    register rtx target2 = gen_rtx_REG (Pmode,
-			      GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM);
+    rtx target = operands[0];
+    rtx target2
+      = gen_rtx_REG (Pmode, GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM);
     if (GET_CODE (target) == SYMBOL_REF) {
         if (microblaze_break_function_p (SYMBOL_REF_DECL (target))) {
             gen_rtx_CLOBBER (VOIDmode, target2);
@@ -2216,7 +2216,8 @@
    (use (match_operand:SI 4 "register_operand"))]
   "flag_pic"
   { 
-    register rtx target2=gen_rtx_REG (Pmode,GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM);
+    rtx target2
+      = gen_rtx_REG (Pmode,GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM);
 
     gen_rtx_CLOBBER (VOIDmode,target2);
     return "brlid\tr15,%1\;%#";
@@ -2232,8 +2233,9 @@
    (clobber (match_operand:SI 3 "register_operand" "=d"))]
   ""
   { 
-    register rtx target = operands[1];
-    register rtx target2=gen_rtx_REG (Pmode,GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM);
+    rtx target = operands[1];
+    rtx target2
+      = gen_rtx_REG (Pmode,GP_REG_FIRST + MB_ABI_SUB_RETURN_ADDR_REGNUM);
 
     if (GET_CODE (target) == SYMBOL_REF)
     {