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2015 May 21
2
[LLVMdev] How can I remove these redundant copy between registers?
Hi,
I've been working on a Blackfin backend (llvm-3.6.0) based on the previous
one that was removed in llvm-3.1.
llc generates codes like this:
29 p1 = r2;
30 r5 = [p1];
31 p1 = r2;
32 r6 = [p1 + 4];
33 r5 = r6 + r5;
34 r6 = [p0 + -4];
35 r5 *= r6;
36 p1 = r2;
37 r6 = [p1 + 8];
38 p1 = r2;
p1 and r2 are in different register classes.
A p*