Require non-NULL register masks.
It doesn't seem worthwhile to give meaning to a NULL register mask
pointer. It complicates all the code using register mask operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149646 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/DeadMachineInstructionElim.cpp b/lib/CodeGen/DeadMachineInstructionElim.cpp
index aeb0b3e..020b64d8 100644
--- a/lib/CodeGen/DeadMachineInstructionElim.cpp
+++ b/lib/CodeGen/DeadMachineInstructionElim.cpp
@@ -175,10 +175,7 @@
}
} else if (MO.isRegMask()) {
// Register mask of preserved registers. All clobbers are dead.
- if (const uint32_t *Mask = MO.getRegMask())
- LivePhysRegs.clearBitsNotInMask(Mask);
- else
- LivePhysRegs.reset();
+ LivePhysRegs.clearBitsNotInMask(MO.getRegMask());
LivePhysRegs |= ReservedRegs;
}
}