[llvm-dev] Enable-ipra: pass of llc

[legend xx via llvm-dev]

Hi,

I'm trying the pass of llc --enable-ipra with benchmarks SPEC CPU 2017.

I compile this benchmarks with clang -O3, and after, y run llc -O3
-enable-ipra.

However, this pass seems not work. If I count the number of mov operations
using -enable-ipra or not, I don't get a significant difference.

Why doesn't this pass work?
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