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2011 Feb 18
0
[LLVMdev] Adding ARM/Thumb2 instructions with "S" suffux
Hello everyone,
I've added suffixed versions of ARM and Thumb2 instructions to tablegen.
That is, for example, "movs" or "orrs".
I implemented a rather simple codegen optimization which removes the
comparison in patterns like
orr r1, r2 ---> orrs r1, r2
cmp r1, 0
It works and have already shown nice acceleration (e.g., 3.3% in SQLite).
I have a few