[all-commits] [llvm/llvm-project] af5506: Revert "[RISCV] Prefer SP over FP for frame index ...

[Petr Hosek via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: af5506c5c12d73439a9fc6f1951caf1cbde183cc
      https://github.com/llvm/llvm-project/commit/af5506c5c12d73439a9fc6f1951caf1cbde183cc
  Author: Petr Hosek <phosek at google.com>
  Date:   2026-06-02 (Tue, 02 Jun 2026)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVFrameLowering.cpp
    M llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
    M llvm/test/CodeGen/RISCV/GlobalISel/vararg.ll
    M llvm/test/CodeGen/RISCV/callee-saved-gprs.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32-ilp32f-common.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32-ilp32f-ilp32d-common.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32.ll
    M llvm/test/CodeGen/RISCV/calling-conv-ilp32e.ll
    M llvm/test/CodeGen/RISCV/calling-conv-lp64.ll
    M llvm/test/CodeGen/RISCV/emit-x8-as-fp.ll
    M llvm/test/CodeGen/RISCV/frame.ll
    M llvm/test/CodeGen/RISCV/frameaddr-returnaddr.ll
    M llvm/test/CodeGen/RISCV/ipra.ll
    M llvm/test/CodeGen/RISCV/large-stack.ll
    M llvm/test/CodeGen/RISCV/local-stack-slot-allocation.ll
    M llvm/test/CodeGen/RISCV/push-pop-popret.ll
    M llvm/test/CodeGen/RISCV/qci-interrupt-attr.ll
    M llvm/test/CodeGen/RISCV/rv64-statepoint-call-lowering-x2.ll
    M llvm/test/CodeGen/RISCV/rvv/callee-saved-regs.ll
    M llvm/test/CodeGen/RISCV/rvv/stack-probing-dynamic.ll
    M llvm/test/CodeGen/RISCV/vararg-ilp32e.ll
    M llvm/test/CodeGen/RISCV/vararg.ll
    M llvm/test/CodeGen/RISCV/xqccmp-callee-saved-gprs.ll
    M llvm/test/CodeGen/RISCV/xqccmp-push-pop-popret.ll
    M llvm/test/DebugInfo/RISCV/relax_dwo_ranges.ll

  Log Message:
  -----------
  Revert "[RISCV] Prefer SP over FP for frame index access when offset fits within compressed immediate range. (#193962)" (#201041)

This reverts commits:

* 46e07d38e078799fa83386ef2b3b5ee423a467c5
* b5d577d3faef34276991fe80b5f869e3f8ef7442

This change is causing a miscompile in zstd, see the discussion under
https://github.com/llvm/llvm-project/pull/193962 for more details.



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