Merge pull request #832 from xplicit/webperf1

[mono.git] / mono / mini / liveness.c

diff --git a/mono/mini/liveness.c b/mono/mini/liveness.c
index b35b21ff1f4d0fbf1599cf3a79fa6499023f0464..a5cbabb53a53333dd2ecf2a2cfd1012bb780d507 100644 (file)
--- a/mono/mini/liveness.c
+++ b/mono/mini/liveness.c
@@ -5,8 +5,13 @@
  *   Dietmar Maurer (dietmar@ximian.com)
  *
  * (C) 2002 Ximian, Inc.
+ * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
  */
 
+#include <config.h>
+
+#ifndef DISABLE_JIT
+
 #include "mini.h"
 
 #define SPILL_COST_INCREMENT (1 << (bb->nesting << 1))
@@ -214,7 +219,8 @@ analyze_liveness_bb (MonoCompile *cfg, MonoBasicBlock *bb)
        MonoMethodVar *vars = cfg->vars;
        guint32 abs_pos = (bb->dfn << 16);
        
-       for (inst_num = 0, ins = bb->code; ins; ins = ins->next, inst_num += 2) {
+       /* Start inst_num from > 0, so last_use.abs_pos is only 0 for dead variables */
+       for (inst_num = 2, ins = bb->code; ins; ins = ins->next, inst_num += 2) {
                const char *spec = INS_INFO (ins->opcode);
                int num_sregs, i;
                int sregs [MONO_MAX_SRC_REGS];
@@ -843,7 +849,7 @@ mono_analyze_liveness2 (MonoCompile *cfg)
        MonoInst **reverse;
 
        if (disabled == -1)
-               disabled = getenv ("DISABLED") != NULL;
+               disabled = g_getenv ("DISABLED") != NULL;
 
        if (disabled)
                return;
@@ -1127,3 +1133,4 @@ mono_analyze_liveness_gc (MonoCompile *cfg)
        g_free (vreg_to_varinfo);
 }
 
+#endif /* DISABLE_JIT */