Fangrui Song 69094d3a4d [InstrProfiling] Use llvm.compiler.used instead of llvm.used for ELF ... Many optimizers (e.g. GlobalOpt/ConstantMerge) do not respect linker semantics for comdat and may not discard the sections as a unit. The interconnected `__llvm_prf_{cnts,data}` sections (in comdat for ELF) are similar to D97432: `__profd_` is not directly referenced, so `__profd_` may be discarded while `__profc_` is retained, breaking the interconnection. We currently conservatively add all such sections to `llvm.used` and let the linker do GC for ELF. In D97448, we will change GlobalObject's in the llvm.used list to use SHF_GNU_RETAIN, causing the metadata sections to be unnecessarily retained (some `check-profile` tests check for GC). Use `llvm.compiler.used` to retain the current GC behavior. Differential Revision: https://reviews.llvm.org/D97585		2021-02-26 16:14:03 -08:00
..
AddressSanitizer	[asan] Avoid putting globals in a comdat section when targetting elf.	2021-02-24 12:01:56 +00:00
BoundsChecking
DataFlowSanitizer	[dfsan] Record dfsan metadata in globals	2021-02-26 14:42:46 -08:00
HeapProfiler
HWAddressSanitizer	[NFC] Disallow unused prefixes under llvm/test	2021-01-21 20:31:52 -08:00
InstrOrderFile
InstrProfiling	[InstrProfiling] Use llvm.compiler.used instead of llvm.used for ELF	2021-02-26 16:14:03 -08:00
MemorySanitizer	[msan] Set cmpxchg shadow precisely	2021-02-19 20:23:23 +00:00
PoisonChecking
SanitizerCoverage	[SanitizerCoverage] Clarify llvm.used/llvm.compiler.used and partially fix unmatched metadata sections on Windows	2021-02-26 11:10:03 -08:00
ThreadSanitizer
cgprofile.ll