Revert r11420 because Win32 compilation was broken.

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
===================================================================
--- src/arm/macro-assembler-arm.cc	(revision 11420)
+++ src/arm/macro-assembler-arm.cc	(working copy)
@@ -3710,28 +3710,15 @@
 }
 
 
-#ifdef DEBUG
-bool AreAliased(Register reg1,
-                Register reg2,
-                Register reg3,
-                Register reg4,
-                Register reg5,
-                Register reg6) {
-  int n_of_valid_regs = reg1.is_valid() + reg2.is_valid() +
-    reg3.is_valid() + reg4.is_valid() + reg5.is_valid() + reg6.is_valid();
-
-  RegList regs = 0;
-  if (reg1.is_valid()) regs |= reg1.bit();
-  if (reg2.is_valid()) regs |= reg2.bit();
-  if (reg3.is_valid()) regs |= reg3.bit();
-  if (reg4.is_valid()) regs |= reg4.bit();
-  if (reg5.is_valid()) regs |= reg5.bit();
-  if (reg6.is_valid()) regs |= reg6.bit();
-  int n_of_non_aliasing_regs = NumRegs(regs);
-
-  return n_of_valid_regs != n_of_non_aliasing_regs;
+bool AreAliased(Register r1, Register r2, Register r3, Register r4) {
+  if (r1.is(r2)) return true;
+  if (r1.is(r3)) return true;
+  if (r1.is(r4)) return true;
+  if (r2.is(r3)) return true;
+  if (r2.is(r4)) return true;
+  if (r3.is(r4)) return true;
+  return false;
 }
-#endif
 
 
 CodePatcher::CodePatcher(byte* address, int instructions)