[PATCH] D108551: [RISCV] Make more optimization for multiplication in the zba extension with SH*ADD.

[Jessica Clarke via Phabricator via llvm-commits]

jrtc27 added inline comments.


================
Comment at: llvm/lib/Target/RISCV/RISCVInstrInfoB.td:1083
+def : Pat<(mul GPR:$rs1, CPow2Plus4:$i),
+          (SH1ADD GPR:$rs1, (SLLI GPR:$rs1,
+                                  (SimmMinus4Lg2XForm CPow2Plus4:$i)))>;
----------------
SH2ADD?


================
Comment at: llvm/lib/Target/RISCV/RISCVInstrInfoB.td:1086
+def : Pat<(mul GPR:$rs1, CPow2Plus8:$i),
+          (SH1ADD GPR:$rs1, (SLLI GPR:$rs1,
+                                  (SimmMinus8Lg2XForm CPow2Plus8:$i)))>;
----------------
SH3ADD?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D108551/new/

https://reviews.llvm.org/D108551