[clang] [compiler-rt] [UBSan] Add check that detects division by zero for fixed-point types (PR #165181)

[Victor Chernyakin via llvm-commits]

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@@ -149,7 +151,7 @@ SANITIZER("shadow-call-stack", ShadowCallStack)
 // ABI or address space layout implications, and only catch undefined behavior.
 SANITIZER_GROUP("undefined", Undefined,
                 Alignment | Bool | Builtin | ArrayBounds | Enum |
-                    FloatCastOverflow |
+                    FixedPoint | FloatCastOverflow |
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localspook wrote:

This is part of the [N1169](https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf) extensions. See #43241 for example. (I'll write a more detailed PR message, but I wanted to make sure the tests pass first.)

https://github.com/llvm/llvm-project/pull/165181