[PATCH] D123692: [libunwind][AArch64] Add support for DWARF expression for RA_SIGN_STATE.

[Mark de Wever via Phabricator via llvm-commits]

Mordante added inline comments.


================
Comment at: libunwind/src/DwarfInstructions.hpp:180
+  if (regloc.location == CFI_Parser<A>::kRegisterUnused)
+    raSignState = regloc.value;
+  else
----------------
In the libc++ pre-commit CI I see some failures https://buildkite.com/llvm-project/libcxx-ci/builds/10887#fb4448a3-a3f7-4a0a-8997-ccbdfd1b35a3 
```
/home/tcwg-buildbot/worker/linaro-aarch64-libcxx-01/llvm-project/libcxx-ci/libunwind/src/DwarfInstructions.hpp:180:26: error: implicit conversion changes signedness: 'int64_t' (aka 'long') to 'libunwind::DwarfInstructions<libunwind::LocalAddressSpace, libunwind::Registers_arm64>::pint_t' (aka 'unsigned long') [-Werror,-Wsign-conversion]
    raSignState = regloc.value;
```
I didn't verify this patch caused it, but it seems very likely to me.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D123692/new/

https://reviews.llvm.org/D123692