Question: 1. How can CSE (common subexpression elimination) worsen instruction selection? 2. How can register allocation worse instruction selection? 3. How can CSE worsen register allocation?

1. How can CSE (common subexpression elimination) worsen instruction selection?

2. How can register allocation worse instruction selection?

3. How can CSE worsen register allocation?

4. How can register allocation worsen CSE?

5. how can CSE worsen peephole optimization?

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