Add a thumb2 pass to insert IT blocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75218 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
index b298ff7..3b1c491 100644
--- a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
@@ -642,7 +642,7 @@
   unsigned Mask = MI->getOperand(Op).getImm();
   unsigned NumTZ = CountTrailingZeros_32(Mask);
   assert(NumTZ <= 3 && "Invalid IT mask!");
-  for (unsigned Pos = 3, e = NumTZ; Pos >= e; --Pos) {
+  for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
     bool T = (Mask & (1 << Pos)) != 0;
     if (T)
       O << 't';