[all-commits] [llvm/llvm-project] 18c5f3: [RegisterScavenger][RISCV] Don't search for FrameS...

[luxufan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 18c5f3c35d18ca069f02b78e62468d7494ed6c7c
      https://github.com/llvm/llvm-project/commit/18c5f3c35d18ca069f02b78e62468d7494ed6c7c
  Author: luxufan <luxufan at iscas.ac.cn>
  Date:   2022-11-18 (Fri, 18 Nov 2022)

  Changed paths:
    M llvm/lib/CodeGen/RegisterScavenging.cpp
    M llvm/test/CodeGen/RISCV/out-of-reach-emergency-slot.mir
    A llvm/test/CodeGen/RISCV/pr58286.ll
    M llvm/test/CodeGen/RISCV/rvv/large-rvv-stack-size.mir

  Log Message:
  -----------
  [RegisterScavenger][RISCV] Don't search for FrameSetup instrs if we were searching from Non-FrameSetup instrs

Otherwise, the spill position may point to position where before
FrameSetup instructions. In which case, the spill instruction may store
to caller's frame since the stack pointer has not been adjustted.

Fixes https://github.com/llvm/llvm-project/issues/58286

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D135693