[all-commits] [llvm/llvm-project] 98b866: [RISCV] Add special case to constant materializati...

Craig Topper via All-commits all-commits at lists.llvm.org
Thu Apr 21 09:43:48 PDT 2022

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 98b866892d657010795cb6416454bc33ebf0cc2b
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2022-04-21 (Thu, 21 Apr 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/MCTargetDesc/RISCVMatInt.cpp
    M llvm/test/CodeGen/RISCV/imm.ll
    M llvm/test/CodeGen/RISCV/rv64zba.ll
    M llvm/test/CodeGen/RISCV/rv64zbp.ll
    M llvm/test/CodeGen/RISCV/vararg.ll
    M llvm/test/MC/RISCV/rv64i-aliases-valid.s
    M llvm/test/MC/RISCV/rv64zba-aliases-valid.s
    M llvm/test/MC/RISCV/rv64zbs-aliases-valid.s

  Log Message:
  [RISCV] Add special case to constant materialization to remove trailing zeros first.

If there are fewer than 12 trailing zeros, we'll try to use an ADDI
at the end of the sequence. If we strip trailing zeros and end the
sequence with a SLLI we might find a shorter sequence.

Differential Revision: https://reviews.llvm.org/D124148

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