Fix off-by-one error.

(low two bits always zero, so off by one bit of encoded value).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134247 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/Thumb2SizeReduction.cpp b/lib/Target/ARM/Thumb2SizeReduction.cpp
index 692189ce6c77837d872e963a73eccc764c182586..c741a6e8a5b7c68fc3252561cfef981cc22ae873 100644 (file)
--- a/lib/Target/ARM/Thumb2SizeReduction.cpp
+++ b/lib/Target/ARM/Thumb2SizeReduction.cpp
@@ -491,7 +491,7 @@ Thumb2SizeReduce::ReduceSpecial(MachineBasicBlock &MBB, MachineInstr *MI,
     // The immediate must be in range, the destination register must be a low
     // reg, the predicate must be "always" and the condition flags must not
     // be being set.
-    if (Imm & 3 || Imm > 1024)
+    if (Imm & 3 || Imm > 1020)
       return false;
     if (!isARMLowRegister(MI->getOperand(0).getReg()))
       return false;