* ggc.h (GGC_RESIZEVAR): New, reorder macros.

[pf3gnuchains/gcc-fork.git] / gcc / ra-conflict.c

diff --git a/gcc/ra-conflict.c b/gcc/ra-conflict.c
index e40f484..c693bc4 100644 (file)
--- a/gcc/ra-conflict.c
+++ b/gcc/ra-conflict.c
@@ -1,5 +1,5 @@
 /* Allocate registers for pseudo-registers that span basic blocks.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2008 Free Software Foundation, Inc.
    Contributed by Kenneth Zadeck <zadeck@naturalbridge.com>
 
 This file is part of GCC.
@@ -297,7 +297,7 @@ mark_reg_store (sparseset allocnos_live,
     {
       unsigned int start = regno;
       unsigned int last = end_hard_regno (mode, regno);
-      if ((GET_CODE (reg) == SUBREG) && !DF_REF_FLAGS_IS_SET (ref, DF_REF_EXTRACT))
+      if ((GET_CODE (reg) == SUBREG) && !DF_REF_FLAGS_IS_SET (ref, DF_REF_ZERO_EXTRACT))
        {
          start += subreg_regno_offset (regno, GET_MODE (SUBREG_REG (reg)),
                                        SUBREG_BYTE (reg), GET_MODE (reg));
@@ -405,7 +405,7 @@ set_conflicts_for_earlyclobber (rtx insn)
 
 
 /* Init LIVE_SUBREGS[ALLOCNUM] and LIVE_SUBREGS_USED[ALLOCNUM] using
-   REG to the the number of nregs, and INIT_VALUE to get the
+   REG to the number of nregs, and INIT_VALUE to get the
    initialization.  ALLOCNUM need not be the regno of REG.  */
 
 void
@@ -441,16 +441,14 @@ ra_init_live_subregs (bool init_value,
 
 
 /* Set REG to be not live in the sets ALLOCNOS_LIVE, LIVE_SUBREGS,
-   HARD_REGS_LIVE.  If EXTRACT is false, assume that the entire reg is
-   set not live even if REG is a subreg.  */
+   HARD_REGS_LIVE.  DEF is the definition of the register.  */
 
 inline static void
 clear_reg_in_live (sparseset allocnos_live,
                   sbitmap *live_subregs, 
                   int *live_subregs_used,
                   HARD_REG_SET *hard_regs_live, 
-                  rtx reg,
-                  bool extract)
+                  rtx reg, struct df_ref *def)
 {
   unsigned int regno = (GET_CODE (reg) == SUBREG) 
     ? REGNO (SUBREG_REG (reg)): REGNO (reg);
@@ -458,8 +456,8 @@ clear_reg_in_live (sparseset allocnos_live,
 
   if (allocnum >= 0)
     {
-      if ((GET_CODE (reg) == SUBREG) && !extract)
-
+      if (GET_CODE (reg) == SUBREG
+         && !DF_REF_FLAGS_IS_SET (def, DF_REF_ZERO_EXTRACT))
        {
          unsigned int start = SUBREG_BYTE (reg);
          unsigned int last = start + GET_MODE_SIZE (GET_MODE (reg));
@@ -467,6 +465,15 @@ clear_reg_in_live (sparseset allocnos_live,
          ra_init_live_subregs (sparseset_bit_p (allocnos_live, allocnum), 
                                live_subregs, live_subregs_used, allocnum, reg);
 
+         if (!DF_REF_FLAGS_IS_SET (def, DF_REF_STRICT_LOW_PART))
+           {
+             /* Expand the range to cover entire words.
+                Bytes added here are "don't care".  */
+             start = start / UNITS_PER_WORD * UNITS_PER_WORD;
+             last = ((last + UNITS_PER_WORD - 1)
+                     / UNITS_PER_WORD * UNITS_PER_WORD);
+           }
+
          /* Ignore the paradoxical bits.  */
          if ((int)last > live_subregs_used[allocnum])
            last = live_subregs_used[allocnum];
@@ -503,7 +510,8 @@ clear_reg_in_live (sparseset allocnos_live,
   if (! fixed_regs[regno])
     {
       unsigned int start = regno;
-      if ((GET_CODE (reg) == SUBREG) && !extract)
+      if (GET_CODE (reg) == SUBREG
+         && !DF_REF_FLAGS_IS_SET (def, DF_REF_ZERO_EXTRACT))
        {
          unsigned int last;
          start += SUBREG_BYTE (reg);
@@ -856,7 +864,7 @@ global_conflicts (void)
                  rtx reg = DF_REF_REG (def);
                  set_reg_in_live (allocnos_live, live_subregs, live_subregs_used, 
                                   &hard_regs_live, reg, 
-                                  DF_REF_FLAGS_IS_SET (def, DF_REF_EXTRACT));
+                                  DF_REF_FLAGS_IS_SET (def, DF_REF_ZERO_EXTRACT));
                  if (dump_file)
                    dump_ref (dump_file, "  adding def", "\n",
                              reg, DF_REF_REGNO (def), live_subregs, live_subregs_used);
@@ -890,8 +898,7 @@ global_conflicts (void)
                  rtx reg = DF_REF_REG (def);
 
                  clear_reg_in_live (allocnos_live, live_subregs, live_subregs_used,
-                                    &hard_regs_live, reg,
-                                    DF_REF_FLAGS_IS_SET (def, DF_REF_EXTRACT));
+                                    &hard_regs_live, reg, def);
                  if (dump_file)
                    dump_ref (dump_file, "  clearing def", "\n", 
                              reg, DF_REF_REGNO (def), live_subregs, live_subregs_used);
@@ -939,7 +946,7 @@ global_conflicts (void)
                 use unless that set also happens to wrapped in a
                 ZERO_EXTRACT. */
              if (DF_REF_FLAGS_IS_SET (use, DF_REF_READ_WRITE) 
-                 && (!DF_REF_FLAGS_IS_SET (use, DF_REF_EXTRACT)) 
+                 && (!DF_REF_FLAGS_IS_SET (use, DF_REF_ZERO_EXTRACT)) 
                  && DF_REF_FLAGS_IS_SET (use, DF_REF_SUBREG))
                continue;
              
@@ -950,7 +957,7 @@ global_conflicts (void)
              if (allocnum >= 0)
                {
                  if (GET_CODE (reg) == SUBREG
-                     && !DF_REF_FLAGS_IS_SET (use, DF_REF_EXTRACT)) 
+                     && !DF_REF_FLAGS_IS_SET (use, DF_REF_ZERO_EXTRACT)) 
                    {
                      unsigned int start = SUBREG_BYTE (reg);
                      unsigned int last = start + GET_MODE_SIZE (GET_MODE (reg));
@@ -1086,7 +1093,7 @@ global_conflicts (void)
                }
 
              /* Early clobbers, by definition, need to not only
-                clobber the registers that are live accross the insn
+                clobber the registers that are live across the insn
                 but need to clobber the registers that die within the
                 insn.  The clobbering for registers live across the
                 insn is handled above.  */ 
@@ -1184,6 +1191,11 @@ global_conflicts (void)
                break;
              record_one_conflict (allocnos_live, &hard_regs_live, regno);
            }
+
+         EXECUTE_IF_SET_IN_SPARSESET (allocnos_live, i)
+           {
+             allocno[i].no_eh_reg = 1;
+           }
        }
 #endif
 
@@ -1208,7 +1220,7 @@ global_conflicts (void)
          /* No need to record conflicts for call clobbered regs if we have
             nonlocal labels around, as we don't ever try to allocate such
             regs in this case.  */
-         if (! current_function_has_nonlocal_label)
+         if (! cfun->has_nonlocal_label)
            for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
              if (call_used_regs [i])
                record_one_conflict (allocnos_live, &hard_regs_live, i);