From 5d9c8a32acc589f78b0fa7353ef1e758eea2357e Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Fri, 6 May 2011 12:02:37 -0700
Subject: [PATCH] Add ORC_CODE=randomize to randomize registers

---
 orc/orccompiler.c               | 10 ++++++----
 orc/orcprogram.h                |  1 +
 testsuite/compile_opcodes_sys.c |  3 +++
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/orc/orccompiler.c b/orc/orccompiler.c
index 182fec4..e5cf4f1 100644
--- a/orc/orccompiler.c
+++ b/orc/orccompiler.c
@@ -45,6 +45,7 @@ static char **_orc_compiler_flag_list;
 int _orc_compiler_flag_backup;
 int _orc_compiler_flag_emulate;
 int _orc_compiler_flag_debug;
+int _orc_compiler_flag_randomize;
 
 void
 _orc_compiler_init (void)
@@ -59,6 +60,7 @@ _orc_compiler_init (void)
   _orc_compiler_flag_backup = orc_compiler_flag_check ("backup");
   _orc_compiler_flag_emulate = orc_compiler_flag_check ("emulate");
   _orc_compiler_flag_debug = orc_compiler_flag_check ("debug");
+  _orc_compiler_flag_randomize = orc_compiler_flag_check ("randomize");
 }
 
 int
@@ -89,10 +91,10 @@ orc_compiler_allocate_register (OrcCompiler *compiler, int data_reg)
   }
 
   roff = 0;
-#if 0
-  /* for testing */
-  roff = rand()&0xf;
-#endif
+  if (_orc_compiler_flag_randomize) {
+    /* for testing */
+    roff = rand()&0x1f;
+  }
 
   for(i=0;i<32;i++){
     reg = offset + ((roff + i)&0x1f);
diff --git a/orc/orcprogram.h b/orc/orcprogram.h
index df31114..812c7eb 100644
--- a/orc/orcprogram.h
+++ b/orc/orcprogram.h
@@ -783,6 +783,7 @@ extern const char *_orc_cpu_name;
 extern int _orc_compiler_flag_backup;
 extern int _orc_compiler_flag_emulate;
 extern int _orc_compiler_flag_debug;
+extern int _orc_compiler_flag_randomize;
 
 void orc_code_chunk_free (OrcCodeChunk *chunk);
 
diff --git a/testsuite/compile_opcodes_sys.c b/testsuite/compile_opcodes_sys.c
index e688a49..8390938 100644
--- a/testsuite/compile_opcodes_sys.c
+++ b/testsuite/compile_opcodes_sys.c
@@ -7,6 +7,8 @@
 #include <orc/orc.h>
 #include <orc-test/orctest.h>
 
+#include <time.h>
+
 
 int error = FALSE;
 
@@ -20,6 +22,7 @@ main (int argc, char *argv[])
   int i;
   OrcOpcodeSet *opcode_set;
 
+  srand(time(NULL));
   orc_init();
   orc_test_init();
 
-- 
2.7.4