Better spill failure messages.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@31026 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index da4c947..5432e5b 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+1999-12-19  Bernd Schmidt  <bernds@cygnus.co.uk>
+
+       * reload1.c (spill_failure): Take class of failed reload as argument
+       and print it.  Caller changed.
+               
 Sun Dec 19 07:50:42 1999  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
        * rs6000.h (SUBTARGET_DEFAULT): New macro.

diff --git a/gcc/reload1.c b/gcc/reload1.c
index dc69085..2a6f9cc 100644 (file)
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -375,7 +375,7 @@ static void find_reload_regs                PROTO((struct insn_chain *, FILE *));
 static void select_reload_regs         PROTO((FILE *));
 static void delete_caller_save_insns   PROTO((void));
 
-static void spill_failure              PROTO((rtx));
+static void spill_failure              PROTO((rtx, enum reg_class));
 static void count_spilled_pseudo       PROTO((int, int, int));
 static void delete_dead_insn           PROTO((rtx));
 static void alter_reg                          PROTO((int, int));
@@ -1720,7 +1720,7 @@ find_reload_regs (chain, dumpfile)
          && rld[r].regno == -1)
        if (! find_reg (chain, i, dumpfile))
          {
-           spill_failure (chain->insn);
+           spill_failure (chain->insn, rld[r].class);
            failure = 1;
            return;
          }
@@ -1787,13 +1787,20 @@ delete_caller_save_insns ()
    INSN should be one of the insns which needed this particular spill reg.  */
 
 static void
-spill_failure (insn)
+spill_failure (insn, class)
      rtx insn;
+     enum reg_class class;
 {
+  static const char *const reg_class_names[] = REG_CLASS_NAMES;
   if (asm_noperands (PATTERN (insn)) >= 0)
-    error_for_asm (insn, "`asm' needs too many reloads");
+    error_for_asm (insn, "Can't find a register in class `%s' while reloading `asm'.",
+                  reg_class_names[class]);
   else
-    fatal_insn ("Unable to find a register to spill.", insn);
+    {
+      error ("Unable to find a register to spill in class `%s'.",
+            reg_class_names[class]);
+      fatal_insn ("This is the insn:", insn);
+    }
 }
 \f
 /* Delete an unneeded INSN and any previous insns who sole purpose is loading