local-alloc.c (requires_inout): Don't use reserved range for EXTRA_CONSTRAINTS...

        * local-alloc.c (requires_inout): Don't use reserved range for
        EXTRA_CONSTRAINTS; use anything not matched by REG_CLASS_FROM_LETTER.
        * recog.c (asm_operand_ok): Likewise.
        (preprocess_constraints, constrain_operands): Likewise.
        * regclass.c (record_reg_classes): Likewise.
        * reload.c (find_reloads): Likewise.
        * reload1.c (maybe_fix_stack_asms): Likewise.
        (reload_cse_simplify_operands): Likewise.
        * stmt.c (expand_asm_operands): Likewise.

        * md.texi: Update constraints documentation.
        * tm.texi (EXTRA_CONSTRAINT): Update.

From-SVN: r36023

1 files changed, 42 insertions, 9 deletions

diff --git a/gcc/stmt.c b/gcc/stmt.c
index d0dbb9e..7b27f87 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -1508,17 +1508,34 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
 	    break;
 
 	  case 'g':  case 'X':
-#ifdef EXTRA_CONSTRAINT
-	  case 'Q':  case 'R':  case 'S':  case 'T':  case 'U':
-#endif
 	    allows_reg = 1;
 	    allows_mem = 1;
 	    break;
 
 	  case 'p': case 'r':
-	  default:
 	    allows_reg = 1;
 	    break;
+
+	  default:
+	    if (! ISALPHA (constraint[j]))
+	      {
+		error ("invalid punctuation `%c' in constraint",
+		       constraint[j]);
+		return;
+	      }
+	    if (REG_CLASS_FROM_LETTER (constraint[j]) != NO_REGS)
+	      allows_reg = 1;
+#ifdef EXTRA_CONSTRAINT
+	    else
+	      {
+		/* Otherwise we can't assume anything about the nature of
+		   the constraint except that it isn't purely registers.
+		   Treat it like "g" and hope for the best.  */
+		allows_reg = 1;
+		allows_mem = 1;
+	      }
+#endif
+	    break;
 	  }
 
       /* If an output operand is not a decl or indirect ref and our constraint
@@ -1681,18 +1698,34 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
 	    /* ... fall through ... */
 
 	  case 'p':  case 'r':
-	  default:
 	    allows_reg = 1;
 	    break;
 
 	  case 'g':  case 'X':
-#ifdef EXTRA_CONSTRAINT
-	  case 'Q':  case 'R':  case 'S':  case 'T':  case 'U':
-#endif
-
 	    allows_reg = 1;
 	    allows_mem = 1;
 	    break;
+
+	  default:
+	    if (! ISALPHA (constraint[j]))
+	      {
+		error ("invalid punctuation `%c' in constraint",
+		       constraint[j]);
+		return;
+	      }
+	    if (REG_CLASS_FROM_LETTER (constraint[j]) != NO_REGS)
+	      allows_reg = 1;
+#ifdef EXTRA_CONSTRAINT
+	    else
+	      {
+		/* Otherwise we can't assume anything about the nature of
+		   the constraint except that it isn't purely registers.
+		   Treat it like "g" and hope for the best.  */
+		allows_reg = 1;
+		allows_mem = 1;
+	      }
+#endif
+	    break;
 	  }
 
       if (! allows_reg && allows_mem)