[all-commits] [llvm/llvm-project] 1b2de7: [RISCV] Use two ADDIs to do some stack pointer adj...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1b2de79ff4b27f3dee342607ee5285d870be08cb
      https://github.com/llvm/llvm-project/commit/1b2de79ff4b27f3dee342607ee5285d870be08cb
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2022-05-31 (Tue, 31 May 2022)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVFrameLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/emergency-slot.mir
    M llvm/test/CodeGen/RISCV/rvv/large-rvv-stack-size.mir
    M llvm/test/CodeGen/RISCV/stack-realignment.ll

  Log Message:
  -----------
  [RISCV] Use two ADDIs to do some stack pointer adjustments.

If the adjustment doesn't fit in 12 bits, try to break it into
two 12 bit values before falling back to movImm+add/sub.

This is based on a similar idea from isel.

Reviewed By: luismarques, reames

Differential Revision: https://reviews.llvm.org/D126392