From 8c2f26bfcb5a27fed68c4601b713f27ac7fee6b7 Mon Sep 17 00:00:00 2001
From: de4dot <de4dot@gmail.com>
Date: Fri, 21 Oct 2011 18:53:36 +0200
Subject: [PATCH] Replace stloc + ldloc with dup + stloc only if it's a bool
 local

---
 blocks/cflow/StLdlocFixer.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/blocks/cflow/StLdlocFixer.cs b/blocks/cflow/StLdlocFixer.cs
index b240a505..c8ce9c2e 100644
--- a/blocks/cflow/StLdlocFixer.cs
+++ b/blocks/cflow/StLdlocFixer.cs
@@ -46,7 +46,7 @@ namespace de4dot.blocks.cflow {
 			for (int i = 0; i < instructions.Count; i++) {
 				var instr = instructions[i];
 				switch (instr.OpCode.Code) {
-				// Xenocode generates stloc + ldloc. Replace it with dup + stloc. It will eventually
+				// Xenocode generates stloc + ldloc (bool). Replace it with dup + stloc. It will eventually
 				// become dup + pop and be removed.
 				case Code.Stloc:
 				case Code.Stloc_S:
@@ -58,7 +58,10 @@ namespace de4dot.blocks.cflow {
 						break;
 					if (!instructions[i + 1].isLdloc())
 						break;
-					if (Instr.getLocalVar(locals, instr) != Instr.getLocalVar(locals, instructions[i + 1]))
+					var local = Instr.getLocalVar(locals, instr);
+					if (local.VariableType.FullName != "System.Boolean")
+						continue;
+					if (local != Instr.getLocalVar(locals, instructions[i + 1]))
 						break;
 					instructions[i] = new Instr(Instruction.Create(OpCodes.Dup));
 					instructions[i + 1] = instr;