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7d4933eff2
This patch make the following optimization. (mul x, 3 * power_of_2) -> (SLLI (SH1ADD x, x), bits) (mul x, 5 * power_of_2) -> (SLLI (SH2ADD x, x), bits) (mul x, 9 * power_of_2) -> (SLLI (SH3ADD x, x), bits) Reviewed By: craig.topper Differential Revision: https://reviews.llvm.org/D105796
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