From f2aabfb65e14f0d3f8bcac15ba874ce81b204148 Mon Sep 17 00:00:00 2001
From: David Malcolm <dmalcolm@redhat.com>
Date: Tue, 22 Mar 2016 18:59:58 -0400
Subject: [PATCH 008/117] FIXME: enough hacks to read the first note insn in
 the test

---
 gcc/read-rtl.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/gcc/read-rtl.c b/gcc/read-rtl.c
index 46bd8e1..7549a91 100644
--- a/gcc/read-rtl.c
+++ b/gcc/read-rtl.c
@@ -1119,6 +1119,18 @@ one_time_initialization (void)
     }
 }
 
+#ifndef GENERATOR_FILE
+static int
+parse_note_insn_name (const char *string)
+{
+  for (int i = 0; i < NOTE_INSN_MAX; i++)
+    if (0 == strcmp (string, GET_NOTE_INSN_NAME (i)))
+      return i;
+  fatal_with_file_and_line ("unrecognized NOTE_INSN name: `%s'", string);  
+}
+#endif /* #ifndef GENERATOR_FILE */
+
+
 /* Subroutine of read_rtx and read_nested_rtx.  CODE_NAME is the name of
    either an rtx code or a code iterator.  Parse the rest of the rtx and
    return it.  */
@@ -1191,8 +1203,24 @@ read_rtx_code (const char *code_name)
 	break;
 
       case 'e':
+	XEXP (return_rtx, i) = read_nested_rtx ();
+	break;
+
       case 'u':
+#ifdef GENERATOR_FILE
 	XEXP (return_rtx, i) = read_nested_rtx ();
+#else
+	{
+	  /* The RTL file recorded the ID of an insn; we must store this
+	     as a pointer, but the insn might not have been loaded yet.
+	     Store this away for now.  */
+	  read_name (&name);
+	  int insn_id = atoi (name.string);
+	  fprintf (stderr,
+		   "FIXME: would store insn %i into field %i of %s %p\n",
+		   insn_id, i, code_name, (void *)return_rtx);
+	}
+#endif
 	break;
 
       case 'V':
@@ -1350,10 +1378,40 @@ read_rtx_code (const char *code_name)
 
       case 'i':
       case 'n':
+#ifdef GENERATOR_FILE
 	/* Can be an iterator or an integer constant.  */
 	read_name (&name);
 	record_potential_iterator_use (&ints, &XINT (return_rtx, i),
 				       name.string);
+#else
+
+	{
+	  // FIXME: print_rtx only writes out operand 5 for notes if:
+	  /* if (NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_LABEL
+		|| NOTE_KIND (in_rtx) == NOTE_INSN_DELETED_DEBUG_LABEL)
+	  */
+	  if (i == 5 && NOTE_P (return_rtx))
+	    break;
+	 
+	  read_name (&name);
+	  int value;
+	  if (format_ptr[i] == 'n')
+	    value = parse_note_insn_name (name.string);
+	    // generated by:
+	    // fprintf (outfile, " %s", GET_NOTE_INSN_NAME (XINT (in_rtx, i)));
+	  else
+	    value = atoi (name.string);
+	  XINT (return_rtx, i) = value;
+	}
+#endif
+	break;
+
+      case 'B':
+	{
+	  read_name (&name);
+	  fprintf (stderr, "FIXME: do something with basic block ID: %s\n",
+		   name.string);
+	}
 	break;
 
       case 'r':
-- 
1.8.5.3