Add better error messages than abort to reload1, and print insn involed.

From-SVN: r8016

gcc/genextract.c

@@ -447,8 +447,6 @@ from the machine description file `md'.  */\n\n");
   printf ("extern rtx *recog_operand_loc[];\n");
   printf ("extern rtx *recog_dup_loc[];\n");
   printf ("extern char recog_dup_num[];\n");
-  printf ("extern\n#ifdef __GNUC__\n__volatile__\n#endif\n");
-  printf ("void fatal_insn_not_found ();\n\n");
 
   printf ("void\ninsn_extract (insn)\n");
   printf ("     rtx insn;\n");

gcc/reload1.c

@@ -1153,7 +1153,8 @@ reload (first, global, dumpfile)
 		      if (other_mode != VOIDmode && other_mode != allocate_mode
 			  && ! modes_equiv_for_class_p (allocate_mode,
 							other_mode, class))
-			abort ();
+			fatal_insn ("Two dissimilar machine modes both need groups of consecutive regs of the same class",
+				    insn);
 		    }
 		  else if (size == 1)
 		    {
@@ -2163,7 +2164,7 @@ spill_failure (insn)
   if (asm_noperands (PATTERN (insn)) >= 0)
     error_for_asm (insn, "`asm' needs too many reloads");
   else
-    abort ();
+    fatal_insn ("Unable to find a register to spill.", insn);
 }
 
 /* Add a new register to the tables of available spill-registers
@@ -3848,7 +3849,7 @@ reload_as_needed (first, live_known)
 			&& ! reload_optional[i]
 			&& (reload_in[i] != 0 || reload_out[i] != 0
 			    || reload_secondary_p[i] != 0))
-		      abort ();
+		      fatal_insn ("Non-optional registers need a spill register", insn);
 
 	      /* Now compute which reload regs to reload them into.  Perhaps
 		 reusing reload regs from previous insns, or else output
@@ -4844,7 +4845,7 @@ allocate_reload_reg (r, insn, last_reload, noerror)
  failure:
   if (asm_noperands (PATTERN (insn)) < 0)
     /* It's the compiler's fault.  */
-    abort ();
+    fatal_insn ("Could not find a spill register", insn);
 
   /* It's the user's fault; the operand's mode and constraint
      don't match.  Disable this reload so we don't crash in final.  */
@@ -6298,7 +6299,7 @@ emit_reload_insns (insn)
 	      /* VOIDmode should never happen for an output.  */
 	      if (asm_noperands (PATTERN (insn)) < 0)
 		/* It's the compiler's fault.  */
-		abort ();
+		fatal_insn ("VOIDmode on an output", insn);
 	      error_for_asm (insn, "output operand is constant in `asm'");
 	      /* Prevent crash--use something we know is valid.  */
 	      mode = word_mode;

gcc/rtl.h

@@ -922,6 +922,10 @@ extern rtx output_constant_def		PROTO((union tree_node *));
 extern rtx immed_real_const		PROTO((union tree_node *));
 extern union tree_node *make_tree	PROTO((union tree_node *, rtx));
 
+/* Abort routines */
+extern void fatal_insn_not_found	PROTO((rtx));
+extern void fatal_insn			PROTO((char *, rtx));
+
 /* Define a default value for STORE_FLAG_VALUE.  */
 
 #ifndef STORE_FLAG_VALUE

gcc/toplev.c

@@ -944,20 +944,17 @@ fatal_io_error (name)
   exit (35);
 }
 
-/* Called to give a better error message when we don't have an insn to match
-   what we are looking for or if the insn's constraints aren't satisfied,
-   rather than just calling abort().  */
+/* Called to give a better error message for a bad insn rather than
+   just calling abort().  */
 
 void
-fatal_insn_not_found (insn)
+fatal_insn (message, insn)
+     char *message;
      rtx insn;
 {
   if (!output_bytecode)
     {
-      if (INSN_CODE (insn) < 0)
-	error ("internal error--unrecognizable insn:");
-      else
-	error ("internal error--insn does not satisfy its constraints:");
+      error (message);
       debug_rtx (insn);
     }
   if (asm_out_file)
@@ -995,6 +992,20 @@ fatal_insn_not_found (insn)
   abort ();
 }
 
+/* Called to give a better error message when we don't have an insn to match
+   what we are looking for or if the insn's constraints aren't satisfied,
+   rather than just calling abort().  */
+
+void
+fatal_insn_not_found (insn)
+     rtx insn;
+{
+  if (INSN_CODE (insn) < 0)
+    fatal_insn ("internal error--unrecognizable insn:", insn);
+  else
+    fatal_insn ("internal error--insn does not satisfy its constraints:", insn);
+}
+
 /* This is the default decl_printable_name function.  */
 
 static char *