[clang] [clang][UBSan] Make sure that the implicit-conversion group is compatible with minimal runtime (PR #114865)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Axel Lundberg (Zonotora)

<details>
<summary>Changes</summary>

We are currently getting:

`clang: error: invalid argument '-fsanitize-minimal-runtime' not allowed with '-fsanitize=implicit-conversion'`

when running

`-fsanitize=implicit-conversion -fsanitize-minimal-runtime`

because `implicit-conversion` now includes `implicit-bitfield-conversion` which is not included in the `integer` check. The `integer` check includes the `implicit-integer-conversion` checks and is supported by the trapping option and because of that compatible with the minimal runtime. It is thus reasonable to make `implicit-bitfield-conversion` compatible with the minimal runtime.

---
Full diff: https://github.com/llvm/llvm-project/pull/114865.diff


1 Files Affected:

- (modified) clang/lib/Driver/SanitizerArgs.cpp (+3-3) 


``````````diff
diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index 89f1215afd0c81..6a00d99ba03428 100644
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -68,9 +68,9 @@ static const SanitizerMask AlwaysRecoverable = SanitizerKind::KernelAddress |
 static const SanitizerMask NeedsLTO = SanitizerKind::CFI;
 static const SanitizerMask TrappingSupported =
     (SanitizerKind::Undefined & ~SanitizerKind::Vptr) | SanitizerKind::Integer |
-    SanitizerKind::Nullability | SanitizerKind::LocalBounds |
-    SanitizerKind::CFI | SanitizerKind::FloatDivideByZero |
-    SanitizerKind::ObjCCast;
+    SanitizerKind::ImplicitConversion | SanitizerKind::Nullability |
+    SanitizerKind::LocalBounds | SanitizerKind::CFI |
+    SanitizerKind::FloatDivideByZero | SanitizerKind::ObjCCast;
 static const SanitizerMask TrappingDefault = SanitizerKind::CFI;
 static const SanitizerMask CFIClasses =
     SanitizerKind::CFIVCall | SanitizerKind::CFINVCall |

``````````

</details>


https://github.com/llvm/llvm-project/pull/114865