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2 Commits

Author SHA1 Message Date
Craig Topper ab2348a6fa [RISCV] Add sext.b/h and zext.b/h/w to RISCVInstrInfo::foldMemoryOperandImpl. 
We can always fold zext.b since it is just andi. The others require
Zba/Zbb.

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D130302
 2022-07-21 14:54:58 -07:00
Craig Topper d7f2a63371 [RISCV] Fold stack reload into sext.w by using lw instead of ld. 
We can use lw to load 4 bytes from the stack and sign extend them
instead of loading all 8 bytes.

Reviewed By: asb

Differential Revision: https://reviews.llvm.org/D129948
 2022-07-18 09:09:17 -07:00