Richard Sandiford <rdsandif...@googlemail.com> writes:
> get_attr_enabled was showing up high in a -O0 compile of fold-const.ii.
> At the moment, extract_insn calls this function for every alternative
> on each extraction, which can be expensive for instructions like
> moves that have many alternatives.
>
> The attribute is only supposed to depend on the insn code and the
> current target.  It isn't allowed to depend on the values of operands.
> LRA already makes use of this to cache the enabled attributes based on code.
>
> This patch makes the caching compiler-wide.  It also converts the bool
> array into a plain int bitfield, since at the moment we don't allow more
> than 30 alternatives.  (It's possible we might want to increase it
> beyond 32 at some point, but then we can change the type to uint64_t
> instead.  Wanting to go beyond 64 would suggest deeper problems
> somewhere. :-))
>
> The patch gives a consistent compile-time improvement of about ~3.5%
> on the -O0 fold-const.ii testcase.
>
> There were a few instances of the construct:
>
>   cl = NO_REGS;
>   for (ignore_p = false, curr_alt = 0;
>        (c = *constraints);
>        constraints += CONSTRAINT_LEN (c, constraints))
>     if (c == '#' || !recog_data.alternative_enabled_p[curr_alt])
>       ignore_p = true;
>     else if (c == ',')
>       {
>       curr_alt++;
>       ignore_p = false;
>       }
>     else if (! ignore_p)
>
> This had the effect of ignoring all alternatives after the first
> attribute-disabled one, since once we found a disabled alternative we'd
> always enter the first arm of the "if" and never increment curr_alt.
> I don't think that was intentional.
>
> Tested on x86_64-linux-gnu.  OK to install?
>
> I notice ira_setup_alts is using a HARD_REG_SET to store a mask
> of alternatives.  If this patch is OK, I'll follow up with a patch
> to use alternative_mask there too.
>
> Thanks,
> Richard
>
>
> gcc/
>       * system.h (TEST_BIT): New macro.
>       * recog.h (alternative_mask): New type.
>       (ALL_ALTERNATIVES, ALTERNATIVE_BIT): New macros.
>       (recog_data_d): Replace alternative_enabled_p array with
>       enabled_alternatives.
>       (target_recog): New structure.
>       (default_target_recog, this_target_recog): Declare.
>       (get_enabled_alternatives): Likewise.
>       * recog.c (default_target_recog, this_target_recog): New variables.
>       (get_enabled_alternatives): New function.
>       (extract_insn): Use it.
>       (preprocess_constraints, constrain_operands): Adjust for change to
>       recog_data.
>       * postreload.c (reload_cse_simplify_operands): Likewise.
>       * reload.c (find_reloads): Likewise.
>       * ira-costs.c (record_reg_classes): Likewise.
>       * ira-lives.c (single_reg_class): Likewise.  Fix bug in which
>       all alternatives after a disabled one would be skipped.
>       (ira_implicitly_set_insn_hard_regs): Likewise.
>       * ira.c (commutative_constraint_p): Likewise.
>       (ira_setup_alts): Adjust for change to recog_data.
>       * lra-int.h (lra_insn_recog_data): Replace alternative_enabled_p
>       with enabled_alternatives.
>       * lra.c (free_insn_recog_data): Update accordingly.
>       (lra_update_insn_recog_data): Likewise.
>       (lra_set_insn_recog_data): Likewise.  Use get_enabled_alternatives.
>       * lra-constraints.c (process_alt_operands): Likewise.  Handle
>       only_alternative as part of the enabled mask.
>       * target-globals.h (this_target_recog): Declare.
>       (target_globals): Add a recog field.
>       (restore_target_globals): Restore this_target_recog.
>       * target-globals.c: Include recog.h.
>       (default_target_globals): Initialize recog field.
>       (save_target_globals): Likewise.

Bah, EWRONGPATCH.

Index: gcc/system.h
===================================================================
--- gcc/system.h        2014-05-20 08:23:13.770215727 +0100
+++ gcc/system.h        2014-05-20 09:14:18.343945817 +0100
@@ -1070,6 +1070,9 @@ #define DEBUG_FUNCTION
 #define DEBUG_VARIABLE
 #endif
 
+/* General macro to extract bit Y of X.  */
+#define TEST_BIT(X, Y) (((X) >> (Y)) & 1)
+
 /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT.  */
 #include "hwint.h"
 
Index: gcc/recog.h
===================================================================
--- gcc/recog.h 2014-05-20 08:23:13.770215727 +0100
+++ gcc/recog.h 2014-05-20 09:14:18.344945827 +0100
@@ -20,8 +20,17 @@ Software Foundation; either version 3, o
 #ifndef GCC_RECOG_H
 #define GCC_RECOG_H
 
-/* Random number that should be large enough for all purposes.  */
+/* Random number that should be large enough for all purposes.  Also define
+   a type that has at least MAX_RECOG_ALTERNATIVES + 1 bits, with the extra
+   bit giving an invalid value that can be used to mean "uninitialized".  */
 #define MAX_RECOG_ALTERNATIVES 30
+typedef unsigned int alternative_mask;
+
+/* A mask of all alternatives.  */
+#define ALL_ALTERNATIVES ((alternative_mask) -1)
+
+/* A mask containing just alternative X.  */
+#define ALTERNATIVE_BIT(X) ((alternative_mask) 1 << (X))
 
 /* Types of operands.  */
 enum op_type {
@@ -235,11 +244,11 @@ struct recog_data_d
   /* True if insn is ASM_OPERANDS.  */
   bool is_asm;
 
-  /* Specifies whether an insn alternative is enabled using the
-     `enabled' attribute in the insn pattern definition.  For back
-     ends not using the `enabled' attribute the array fields are
-     always set to `true' in expand_insn.  */
-  bool alternative_enabled_p [MAX_RECOG_ALTERNATIVES];
+  /* Specifies whether an insn alternative is enabled using the `enabled'
+     attribute in the insn pattern definition.  For back ends not using
+     the `enabled' attribute the bits are always set to 1 in expand_insn.
+     Bits beyond the last alternative are also set to 1.  */
+  alternative_mask enabled_alternatives;
 
   /* In case we are caching, hold insn data was generated for.  */
   rtx insn;
@@ -361,4 +370,22 @@ struct insn_data_d
 extern const struct insn_data_d insn_data[];
 extern int peep2_current_count;
 
+#ifndef GENERATOR_FILE
+#include "insn-codes.h"
+
+/* Target-dependent globals.  */
+struct target_recog {
+  alternative_mask x_enabled_alternatives[LAST_INSN_CODE];
+};
+
+extern struct target_recog default_target_recog;
+#if SWITCHABLE_TARGET
+extern struct target_recog *this_target_recog;
+#else
+#define this_target_recog (&default_target_recog)
+#endif
+
+alternative_mask get_enabled_alternatives (rtx);
+#endif
+
 #endif /* GCC_RECOG_H */
Index: gcc/recog.c
===================================================================
--- gcc/recog.c 2014-05-20 08:23:13.770215727 +0100
+++ gcc/recog.c 2014-05-20 09:14:35.232103084 +0100
@@ -61,6 +61,11 @@ static void validate_replace_rtx_1 (rtx
 static void validate_replace_src_1 (rtx *, void *);
 static rtx split_insn (rtx);
 
+struct target_recog default_target_recog;
+#if SWITCHABLE_TARGET
+struct target_recog *this_target_recog = &default_target_recog;
+#endif
+
 /* Nonzero means allow operands to be volatile.
    This should be 0 if you are generating rtl, such as if you are calling
    the functions in optabs.c and expmed.c (most of the time).
@@ -2137,6 +2142,48 @@ mode_dependent_address_p (rtx addr, addr
   return targetm.mode_dependent_address_p (addr, addrspace);
 }
 
+/* Return the mask of operand alternatives that are allowed for INSN.
+   This mask depends only on INSN and on the current target; it does not
+   depend on things like the values of operands.  */
+
+alternative_mask
+get_enabled_alternatives (rtx insn)
+{
+  /* Quick exit for asms and for targets that don't use the "enabled"
+     attribute.  */
+  int code = INSN_CODE (insn);
+  if (code < 0 || !HAVE_ATTR_enabled)
+    return ALL_ALTERNATIVES;
+
+  /* Calling get_attr_enabled can be expensive, so cache the mask
+     for speed.  */
+  if (this_target_recog->x_enabled_alternatives[code])
+    return this_target_recog->x_enabled_alternatives[code];
+
+  /* Temporarily install enough information for get_attr_enabled to assume
+     that the insn operands are already cached.  As above, the attribute
+     mustn't depend on the values of operands, so we don't provide their
+     real values here.  */
+  rtx old_insn = recog_data.insn;
+  int old_alternative = which_alternative;
+
+  recog_data.insn = insn;
+  alternative_mask enabled = ALL_ALTERNATIVES;
+  int n_alternatives = insn_data[code].n_alternatives;
+  for (int i = 0; i < n_alternatives; i++)
+    {
+      which_alternative = i;
+      if (!get_attr_enabled (insn))
+       enabled &= ~ALTERNATIVE_BIT (i);
+    }
+
+  recog_data.insn = old_insn;
+  which_alternative = old_alternative;
+
+  this_target_recog->x_enabled_alternatives[code] = enabled;
+  return enabled;
+}
+
 /* Like extract_insn, but save insn extracted and don't extract again, when
    called again for the same insn expecting that recog_data still contain the
    valid information.  This is used primary by gen_attr infrastructure that
@@ -2269,19 +2316,7 @@ extract_insn (rtx insn)
 
   gcc_assert (recog_data.n_alternatives <= MAX_RECOG_ALTERNATIVES);
 
-  if (INSN_CODE (insn) < 0)
-    for (i = 0; i < recog_data.n_alternatives; i++)
-      recog_data.alternative_enabled_p[i] = true;
-  else
-    {
-      recog_data.insn = insn;
-      for (i = 0; i < recog_data.n_alternatives; i++)
-       {
-         which_alternative = i;
-         recog_data.alternative_enabled_p[i]
-           = HAVE_ATTR_enabled ? get_attr_enabled (insn) : 1;
-       }
-    }
+  recog_data.enabled_alternatives = get_enabled_alternatives (insn);
 
   recog_data.insn = NULL;
   which_alternative = -1;
@@ -2314,7 +2349,7 @@ preprocess_constraints (void)
          op_alt[j].matches = -1;
          op_alt[j].matched = -1;
 
-         if (!recog_data.alternative_enabled_p[j])
+         if (!TEST_BIT (recog_data.enabled_alternatives, j))
            {
              p = skip_alternative (p);
              continue;
@@ -2490,7 +2525,7 @@ constrain_operands (int strict)
       int lose = 0;
       funny_match_index = 0;
 
-      if (!recog_data.alternative_enabled_p[which_alternative])
+      if (!TEST_BIT (recog_data.enabled_alternatives, which_alternative))
        {
          int i;
 
Index: gcc/postreload.c
===================================================================
--- gcc/postreload.c    2014-05-20 08:23:13.770215727 +0100
+++ gcc/postreload.c    2014-05-20 09:14:18.338945771 +0100
@@ -584,7 +584,7 @@ reload_cse_simplify_operands (rtx insn,
                     alternative yet and the operand being replaced is not
                     a cheap CONST_INT.  */
                  if (op_alt_regno[i][j] == -1
-                     && recog_data.alternative_enabled_p[j]
+                     && TEST_BIT (recog_data.enabled_alternatives, j)
                      && reg_fits_class_p (testreg, rclass, 0, mode)
                      && (!CONST_INT_P (recog_data.operand[i])
                          || (set_src_cost (recog_data.operand[i],
Index: gcc/reload.c
===================================================================
--- gcc/reload.c        2014-05-20 08:23:13.770215727 +0100
+++ gcc/reload.c        2014-05-20 09:14:18.342945808 +0100
@@ -3010,7 +3010,7 @@ find_reloads (rtx insn, int replace, int
     {
       int swapped;
 
-      if (!recog_data.alternative_enabled_p[this_alternative_number])
+      if (!TEST_BIT (recog_data.enabled_alternatives, this_alternative_number))
        {
          int i;
 
Index: gcc/ira-costs.c
===================================================================
--- gcc/ira-costs.c     2014-05-20 08:23:13.770215727 +0100
+++ gcc/ira-costs.c     2014-05-20 09:14:18.331945705 +0100
@@ -421,7 +421,7 @@ record_reg_classes (int n_alts, int n_op
       int alt_fail = 0;
       int alt_cost = 0, op_cost_add;
 
-      if (!recog_data.alternative_enabled_p[alt])
+      if (!TEST_BIT (recog_data.enabled_alternatives, alt))
        {
          for (i = 0; i < recog_data.n_operands; i++)
            constraints[i] = skip_alternative (constraints[i]);
Index: gcc/ira-lives.c
===================================================================
--- gcc/ira-lives.c     2014-05-20 08:23:13.770215727 +0100
+++ gcc/ira-lives.c     2014-05-20 09:14:18.332945715 +0100
@@ -743,22 +743,17 @@ mark_hard_reg_early_clobbers (rtx insn,
 static enum reg_class
 single_reg_class (const char *constraints, rtx op, rtx equiv_const)
 {
-  int curr_alt, c;
-  bool ignore_p;
+  int c;
   enum reg_class cl, next_cl;
 
   cl = NO_REGS;
-  for (ignore_p = false, curr_alt = 0;
-       (c = *constraints);
-       constraints += CONSTRAINT_LEN (c, constraints))
-    if (c == '#' || !recog_data.alternative_enabled_p[curr_alt])
-      ignore_p = true;
+  alternative_mask enabled = recog_data.enabled_alternatives;
+  for (; (c = *constraints); constraints += CONSTRAINT_LEN (c, constraints))
+    if (c == '#')
+      enabled &= ~ALTERNATIVE_BIT (0);
     else if (c == ',')
-      {
-       curr_alt++;
-       ignore_p = false;
-      }
-    else if (! ignore_p)
+      enabled >>= 1;
+    else if (enabled & 1)
       switch (c)
        {
        case ' ':
@@ -887,8 +882,7 @@ single_reg_operand_class (int op_num)
 void
 ira_implicitly_set_insn_hard_regs (HARD_REG_SET *set)
 {
-  int i, curr_alt, c, regno = 0;
-  bool ignore_p;
+  int i, c, regno = 0;
   enum reg_class cl;
   rtx op;
   enum machine_mode mode;
@@ -909,17 +903,13 @@ ira_implicitly_set_insn_hard_regs (HARD_
          mode = (GET_CODE (op) == SCRATCH
                  ? GET_MODE (op) : PSEUDO_REGNO_MODE (regno));
          cl = NO_REGS;
-         for (ignore_p = false, curr_alt = 0;
-              (c = *p);
-              p += CONSTRAINT_LEN (c, p))
-           if (c == '#' || !recog_data.alternative_enabled_p[curr_alt])
-             ignore_p = true;
+         alternative_mask enabled = recog_data.enabled_alternatives;
+         for (; (c = *p); p += CONSTRAINT_LEN (c, p))
+           if (c == '#')
+             enabled &= ~ALTERNATIVE_BIT (0);
            else if (c == ',')
-             {
-               curr_alt++;
-               ignore_p = false;
-             }
-           else if (! ignore_p)
+             enabled >>= 1;
+           else if (enabled & 1)
              switch (c)
                {
                case 'r':
Index: gcc/ira.c
===================================================================
--- gcc/ira.c   2014-05-20 08:23:13.770215727 +0100
+++ gcc/ira.c   2014-05-20 09:14:18.334945733 +0100
@@ -1774,23 +1774,20 @@ setup_prohibited_mode_move_regs (void)
 static bool
 commutative_constraint_p (const char *str)
 {
-  int curr_alt, c;
-  bool ignore_p;
+  int c;
 
-  for (ignore_p = false, curr_alt = 0;;)
+  alternative_mask enabled = recog_data.enabled_alternatives;
+  for (;;)
     {
       c = *str;
       if (c == '\0')
        break;
       str += CONSTRAINT_LEN (c, str);
-      if (c == '#' || !recog_data.alternative_enabled_p[curr_alt])
-       ignore_p = true;
+      if (c == '#')
+       enabled &= ~ALTERNATIVE_BIT (0);
       else if (c == ',')
-       {
-         curr_alt++;
-         ignore_p = false;
-       }
-      else if (! ignore_p)
+       enabled >>= 1;
+      else if (enabled & 1)
        {
          /* Usually `%' is the first constraint character but the
             documentation does not require this.  */
@@ -1844,7 +1841,8 @@ ira_setup_alts (rtx insn, HARD_REG_SET &
        }
       for (nalt = 0; nalt < recog_data.n_alternatives; nalt++)
        {
-         if (! recog_data.alternative_enabled_p[nalt] || TEST_HARD_REG_BIT 
(alts, nalt))
+         if (!TEST_BIT (recog_data.enabled_alternatives, nalt)
+             || TEST_HARD_REG_BIT (alts, nalt))
            continue;
 
          for (nop = 0; nop < recog_data.n_operands; nop++)
Index: gcc/lra-int.h
===================================================================
--- gcc/lra-int.h       2014-05-20 08:23:13.770215727 +0100
+++ gcc/lra-int.h       2014-05-20 09:14:18.337945761 +0100
@@ -227,7 +227,7 @@ struct lra_insn_recog_data
      ending with a negative value.  */
   int *arg_hard_regs;
   /* Alternative enabled for the insn. NULL for debug insns.  */
-  bool *alternative_enabled_p;
+  alternative_mask enabled_alternatives;
   /* The following member value is always NULL for a debug insn.  */
   struct lra_insn_reg *regs;
 };
Index: gcc/lra.c
===================================================================
--- gcc/lra.c   2014-05-20 08:23:13.770215727 +0100
+++ gcc/lra.c   2014-05-20 09:14:18.338945771 +0100
@@ -724,8 +724,6 @@ free_insn_recog_data (lra_insn_recog_dat
     free (data->dup_loc);
   if (data->arg_hard_regs != NULL)
     free (data->arg_hard_regs);
-  if (HAVE_ATTR_enabled && data->alternative_enabled_p != NULL)
-    free (data->alternative_enabled_p);
   if (data->icode < 0 && NONDEBUG_INSN_P (data->insn))
     {
       if (data->insn_static_data->operand_alternative != NULL)
@@ -1072,7 +1070,7 @@ lra_set_insn_recog_data (rtx insn)
       data->insn_static_data = &debug_insn_static_data;
       data->dup_loc = NULL;
       data->arg_hard_regs = NULL;
-      data->alternative_enabled_p = NULL;
+      data->enabled_alternatives = ALL_ALTERNATIVES;
       data->operand_loc = XNEWVEC (rtx *, 1);
       data->operand_loc[0] = &INSN_VAR_LOCATION_LOC (insn);
       return data;
@@ -1132,7 +1130,7 @@ lra_set_insn_recog_data (rtx insn)
          = (insn_static_data->operand[i].constraint[0] == '=' ? OP_OUT
             : insn_static_data->operand[i].constraint[0] == '+' ? OP_INOUT
             : OP_IN);
-      data->alternative_enabled_p = NULL;
+      data->enabled_alternatives = ALL_ALTERNATIVES;
     }
   else
     {
@@ -1159,27 +1157,7 @@ lra_set_insn_recog_data (rtx insn)
          memcpy (locs, recog_data.dup_loc, n * sizeof (rtx *));
        }
       data->dup_loc = locs;
-      if (HAVE_ATTR_enabled)
-       {
-         bool *bp;
-
-         n = insn_static_data->n_alternatives;
-         lra_assert (n >= 0);
-         data->alternative_enabled_p = bp = XNEWVEC (bool, n);
-         /* Cache the insn because we don't want to call extract_insn
-            from get_attr_enabled as extract_insn modifies
-            which_alternative.  The attribute enabled should not depend
-            on insn operands, operand modes, operand types, and operand
-            constraints.  It should depend on the architecture.  If it
-            is not true, we should rewrite this file code to use
-            extract_insn instead of less expensive insn_extract.  */
-         recog_data.insn = insn;
-         for (i = 0; i < n; i++)
-           {
-             which_alternative = i;
-             bp[i] = get_attr_enabled (insn);
-           }
-       }
+      data->enabled_alternatives = get_enabled_alternatives (insn);
     }
   if (GET_CODE (PATTERN (insn)) == CLOBBER || GET_CODE (PATTERN (insn)) == USE)
     insn_static_data->hard_regs = NULL;
@@ -1370,18 +1348,19 @@ lra_update_insn_recog_data (rtx insn)
 #ifdef ENABLE_CHECKING
       {
        int i;
-       bool *bp;
+       alternative_mask enabled;
 
        n = insn_static_data->n_alternatives;
-       bp = data->alternative_enabled_p;
-       lra_assert (n >= 0 && bp != NULL);
+       enabled = data->enabled_alternatives;
+       lra_assert (n >= 0);
        /* Cache the insn to prevent extract_insn call from
           get_attr_enabled.  */
        recog_data.insn = insn;
        for (i = 0; i < n; i++)
          {
            which_alternative = i;
-           lra_assert (bp[i] == get_attr_enabled (insn));
+           lra_assert (TEST_BIT (enabled, i)
+                       == (bool) get_attr_enabled (insn));
          }
       }
 #endif
Index: gcc/lra-constraints.c
===================================================================
--- gcc/lra-constraints.c       2014-05-20 08:23:13.770215727 +0100
+++ gcc/lra-constraints.c       2014-05-20 09:14:18.336945752 +0100
@@ -1557,19 +1557,16 @@ process_alt_operands (int only_alternati
      together, the second alternatives go together, etc.
 
      First loop over alternatives.  */
+  alternative_mask enabled = curr_id->enabled_alternatives;
+  if (only_alternative >= 0)
+    enabled &= ALTERNATIVE_BIT (only_alternative);
+
   for (nalt = 0; nalt < n_alternatives; nalt++)
     {
       /* Loop over operands for one constraint alternative.  */
-#if HAVE_ATTR_enabled
-      if (curr_id->alternative_enabled_p != NULL
-         && ! curr_id->alternative_enabled_p[nalt])
-       continue;
-#endif
-
-      if (only_alternative >= 0 && nalt != only_alternative)
+      if (!TEST_BIT (enabled, nalt))
        continue;
 
-            
       overall = losers = reject = reload_nregs = reload_sum = 0;
       for (nop = 0; nop < n_operands; nop++)
        {
Index: gcc/target-globals.h
===================================================================
--- gcc/target-globals.h        2014-05-20 08:23:13.770215727 +0100
+++ gcc/target-globals.h        2014-05-20 09:14:18.343945817 +0100
@@ -24,6 +24,7 @@ #define TARGET_GLOBALS_H 1
 extern struct target_flag_state *this_target_flag_state;
 extern struct target_regs *this_target_regs;
 extern struct target_rtl *this_target_rtl;
+extern struct target_recog *this_target_recog;
 extern struct target_hard_regs *this_target_hard_regs;
 extern struct target_reload *this_target_reload;
 extern struct target_expmed *this_target_expmed;
@@ -43,6 +44,7 @@ struct GTY(()) target_globals {
   struct target_flag_state *GTY((skip)) flag_state;
   void *GTY((atomic)) regs;
   struct target_rtl *rtl;
+  void *GTY((atomic)) recog;
   void *GTY((atomic)) hard_regs;
   void *GTY((atomic)) reload;
   void *GTY((atomic)) expmed;
@@ -70,6 +72,7 @@ restore_target_globals (struct target_gl
   this_target_flag_state = g->flag_state;
   this_target_regs = (struct target_regs *) g->regs;
   this_target_rtl = g->rtl;
+  this_target_recog = (struct target_recog *) g->recog;
   this_target_hard_regs = (struct target_hard_regs *) g->hard_regs;
   this_target_reload = (struct target_reload *) g->reload;
   this_target_expmed = (struct target_expmed *) g->expmed;
Index: gcc/target-globals.c
===================================================================
--- gcc/target-globals.c        2014-05-20 08:23:13.770215727 +0100
+++ gcc/target-globals.c        2014-05-20 09:14:18.342945808 +0100
@@ -43,12 +43,14 @@ Software Foundation; either version 3, o
 #include "gcse.h"
 #include "bb-reorder.h"
 #include "lower-subreg.h"
+#include "recog.h"
 
 #if SWITCHABLE_TARGET
 struct target_globals default_target_globals = {
   &default_target_flag_state,
   &default_target_regs,
   &default_target_rtl,
+  &default_target_recog,
   &default_target_hard_regs,
   &default_target_reload,
   &default_target_expmed,
@@ -84,6 +86,7 @@ save_target_globals (void)
   g->flag_state = &p->flag_state;
   g->regs = ggc_internal_cleared_alloc (sizeof (struct target_regs));
   g->rtl = ggc_cleared_alloc<target_rtl> ();
+  g->recog = ggc_internal_cleared_alloc (sizeof (struct target_recog));
   g->hard_regs
     = ggc_internal_cleared_alloc (sizeof (struct target_hard_regs));
   g->reload = ggc_internal_cleared_alloc (sizeof (struct target_reload));

Reply via email to