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Commit 4265cbaa authored by Craig Topper's avatar Craig Topper
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[RISCV] Make SIGN_EXTEND_INREG from i8/i16 legal when Zbb extension is enabled. 

This produces better code for sign extend to i64 on RV32 target.

Differential Revision: https://reviews.llvm.org/D91023
parent b2231770
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