Thurston Dang cb8a90b7d1 [ubsan] Remove -ubsan-unique-traps (replace with -fno-sanitize-merge) (#120613) ...

-fno-sanitize-merge (introduced in
https://github.com/llvm/llvm-project/pull/120511) duplicates the
functionality of -ubsan-unique-traps but also allows individual checks
to be specified e.g.,
* "-fno-sanitize-merge" without arguments is equivalent to
-ubsan-unique-traps
* "-fno-sanitize-merge=bool,enum" will apply it only to those two checks

Additionally, the naming is more consistent with the rest of the
-fsanitize- family.

This patch therefore removes -ubsan-unique-traps. This breaks backwards
compatibility; we hope that this is acceptable since '-mllvm
-ubsan-unique-traps' was an experimental flag.

This patch also adds negative test examples to bounds-checking.c, and
strengthens the NOOPTARRAY assertion to prevent spurious matches.

"-bounds-checking-unique-traps" is unaffected by this patch.

2024-12-19 12:53:48 -08:00

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