[llvm-commits] [llvm] r127598 - in /llvm/trunk: lib/CodeGen/SelectionDAG/SelectionDAG.cpp test/CodeGen/ARM/shifter_operand.ll test/CodeGen/ARM/undef-sext.ll

[Frits van Bommel]

On Mon, Mar 14, 2011 at 7:15 PM, Evan Cheng <evan.cheng at apple.com> wrote:
> Log:
> Minor optimization. sign-ext/anyext of undef is still undef.

I can believe this for anyext, but a sext'ed undef should probably
still have equal high bits, which is not a requirement for the bigger
undef you're replacing it with.