[all-commits] [llvm/llvm-project] 58b2d6: [RISCV] Add special case to selectImm for constant...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 58b2d652af49ee9d9ff2af6edd7f67f23b26bfee
      https://github.com/llvm/llvm-project/commit/58b2d652af49ee9d9ff2af6edd7f67f23b26bfee
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-06-06 (Tue, 06 Jun 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/bswap-bitreverse.ll
    M llvm/test/CodeGen/RISCV/ctlz-cttz-ctpop.ll
    M llvm/test/CodeGen/RISCV/div-by-constant.ll
    M llvm/test/CodeGen/RISCV/div.ll
    M llvm/test/CodeGen/RISCV/pr56457.ll
    M llvm/test/CodeGen/RISCV/rv64xtheadbb.ll
    M llvm/test/CodeGen/RISCV/rv64zbb.ll
    M llvm/test/CodeGen/RISCV/rvv/bitreverse-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/bitreverse-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/ctlz-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/ctlz-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/ctpop-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/ctpop-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/cttz-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/cttz-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitreverse-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-bitreverse.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctlz-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctlz.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctpop-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-ctpop.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-cttz.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int.ll
    M llvm/test/CodeGen/RISCV/sextw-removal.ll
    M llvm/test/CodeGen/RISCV/split-udiv-by-constant.ll
    M llvm/test/CodeGen/RISCV/split-urem-by-constant.ll
    M llvm/test/CodeGen/RISCV/srem-seteq-illegal-types.ll

  Log Message:
  -----------
  [RISCV] Add special case to selectImm for constants that can be created with (ADD (SLLI C, 32), C).

Where C is a simm32.

This costs an extra temporary register, but avoids a constant pool.

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D152236