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The !associated metadata may be attached to a global object declaration with a single argument that references another global object. This metadata prevents discarding of the global object in linker GC unless the referenced object is also discarded. Furthermore, when a function symbol is discarded by the linker, setting up !associated metadata allows linker to discard counters, data and values associated with that function symbol. This is not possible today because there's metadata to guide the linker. This approach is also used by other instrumentations like sanitizers. Note that !associated metadata is only supported by ELF, it does not have any effect on non-ELF targets. Differential Revision: https://reviews.llvm.org/D76802 |
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| .. | ||
| AddressSanitizer | ||
| BoundsChecking | ||
| DataFlowSanitizer | ||
| HWAddressSanitizer | ||
| InstrOrderFile | ||
| InstrProfiling | ||
| MemorySanitizer | ||
| PoisonChecking | ||
| SanitizerCoverage | ||
| ThreadSanitizer | ||
| cgprofile.ll | ||