)]}'
{
  "commit": "2db2cf62f1ad2788365b1898aefdba2fa76aab87",
  "tree": "665a21a1309aed01754fc958f76bcb0540463618",
  "parents": [
    "372d44c5611ecce9144c985a849ca06f108289fe"
  ],
  "author": {
    "name": "Jin Ma",
    "email": "jinma@linux.alibaba.com",
    "time": "Wed Jul 15 22:26:18 2026 +0800"
  },
  "committer": {
    "name": "Jin Ma",
    "email": "jinma@linux.alibaba.com",
    "time": "Tue Aug 04 14:48:51 2026 +0800"
  },
  "message": "RISC-V: Avoid unused frame-pointer references in stack ties\n\nEpilogue stack ties referenced s0 without a frame pointer, making the\nunsaved register ever live.  Regrename could then select it and\ncorrupt callee-saved state during exception unwinding.\n\nThe simpler fix of allowing equal operands in the existing pattern is\nunsafe: copy propagation can fold stack_tie (sp, t3) used by stack\nprobing into stack_tie (sp, sp).  This removes t3 \u003d sp while CFI\nstill names t3 as the CFA.\n\nKeep the two-register pattern distinct and add an SP-only form for\nepilogue barriers.\n\ngcc/ChangeLog:\n\n\t* config/riscv/riscv-sr.cc (riscv_sr_match_epilogue): Accept\n\tSP-only stack ties.\n\t* config/riscv/riscv.cc (riscv_emit_stack_tie): Use parameterized\n\tgenerators and emit SP-only ties.\n\t(riscv_expand_epilogue): Use SP ties without a frame pointer.\n\t* config/riscv/riscv.md (@stack_tie\u003cmode\u003e): Use a parameterized name.\n\t(@stack_tie_sp\u003cmode\u003e): New pattern.\n\ngcc/testsuite/ChangeLog:\n\n\t* g++.target/riscv/stack-tie-unwind.C: New test.\n\t* gcc.target/riscv/stack-tie-no-fp.c: New test.\n\nSigned-off-by: Jin Ma \u003cjinma@linux.alibaba.com\u003e\n",
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