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| author | 3405691582 <dsk@google.com> | 2025-03-31 12:17:55 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-03-31 09:17:55 -0700 |
| commit | c180e249d0013474d502cd779ec65b33cf7e9468 (patch) | |
| tree | 61c91b1f37f2e3bd61dcc75346476e25efa200e8 /mlir/lib/Bytecode/Reader/BytecodeReader.cpp | |
| parent | 87602f6d03ada10d0de7f1440320ffec4eb86790 (diff) | |
| download | llvm-c180e249d0013474d502cd779ec65b33cf7e9468.zip llvm-c180e249d0013474d502cd779ec65b33cf7e9468.tar.gz llvm-c180e249d0013474d502cd779ec65b33cf7e9468.tar.bz2 | |
Fix crash lowering stack guard on OpenBSD/aarch64. (#125416)
TargetLoweringBase::getIRStackGuard refers to a platform-specific guard
variable. Before this change, TargetLoweringBase::getSDagStackGuard only
referred to a different variable.
This means that SelectionDAGBuilder's getLoadStackGuard does not get
memory operands. However, AArch64InstrInfo::expandPostRAPseudo assumes
that the passed MachineInstr has nonzero memoperands, causing a
segfault.
We have two possible options here: either disabling the LOAD_STACK_GUARD
node entirely in AArch64TargetLowering::useLoadStackGuardNode or just
making the platform-specific values match across TargetLoweringBase.
Here, we try the latter.
Diffstat (limited to 'mlir/lib/Bytecode/Reader/BytecodeReader.cpp')
0 files changed, 0 insertions, 0 deletions