commit 8000c6c535c5a1d8515299072b51fd1baa8b632f
author Evan Cheng <evan.cheng@apple.com> Thu Oct 22 00:40:00 2009 +0000
committer Evan Cheng <evan.cheng@apple.com> Thu Oct 22 00:40:00 2009 +0000
tree 29d4e3ecac3f40ab815a7236f366279ac48f711e
parent 921bdaaa98c31a07bc5987f7a3412e101173a146

Don't generate sbfx / ubfx with negative lsb field. Patch by David Conrad.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84813 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMISelDAGToDAG.cpp

diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp
index 6e97693..5c1835b 100644
--- a/lib/Target/ARM/ARMISelDAGToDAG.cpp
+++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp
@@ -1287,7 +1287,7 @@
       assert(Srl_imm > 0 && Srl_imm < 32 && "bad amount in shift node!");
       unsigned Width = 32 - Srl_imm;
       int LSB = Srl_imm - Shl_imm;
-      if ((LSB + Width) > 32)
+      if (LSB < 0)
         return NULL;
       SDValue Reg0 = CurDAG->getRegister(0, MVT::i32);
       SDValue Ops[] = { Op.getOperand(0).getOperand(0),