Fixed a bug that causes codegen of noop like add r0, r0, #0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35627 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMRegisterInfo.cpp b/lib/Target/ARM/ARMRegisterInfo.cpp
index abc0ad8274382e0b71033a27e4aaa592820bc36d..bf6adbd95f379e0317db99a358cf4ec2bd517287 100644 (file)
--- a/lib/Target/ARM/ARMRegisterInfo.cpp
+++ b/lib/Target/ARM/ARMRegisterInfo.cpp
@@ -732,7 +732,7 @@ void ARMRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
     // a sequence of ADDri instructions.  First though, pull as much of the imm
     // into this ADDri as possible.
     unsigned RotAmt = ARM_AM::getSOImmValRotate(Offset);
-    unsigned ThisImmVal = Offset & ARM_AM::rotr32(0xFF, (32-RotAmt) & 31);
+    unsigned ThisImmVal = Offset & ARM_AM::rotr32(0xFF, RotAmt);
     
     // We will handle these bits from offset, clear them.
     Offset &= ~ThisImmVal;