Reid Kleckner f30ad55559 [PGO] Use linkonce_odr linkage for __profd_ variables in comdat groups ... This fixes relocations against __profd_ symbols in discarded sections, which is PR41380. In general, instrumentation happens very early, and optimization and inlining happens afterwards. The counters for a function are calculated early, and after inlining, counters for an inlined function may be widely referenced by other functions. For C++ inline functions of all kinds (linkonce_odr & available_externally mainly), instr profiling wants to deduplicate these __profc_ and __profd_ globals. Otherwise the binary would be quite large. I made __profd_ and __profc_ comdat in r355044, but I chose to make __profd_ internal. At the time, I was only dealing with coverage, and in that case, none of the instrumentation needs to reference __profd_. However, if you use PGO, then instrumentation passes add calls to __llvm_profile_instrument_range which reference __profd_ globals. The solution is to make these globals externally visible by using linkonce_odr linkage for data as was done for counters. This is safe because PGO adds a CFG hash to the names of the data and counter globals, so if different TUs have different globals, they will get different data and counter arrays. Reviewers: xur, hans Differential Revision: https://reviews.llvm.org/D67579 llvm-svn: 372020		2019-09-16 18:49:09 +00:00
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AggressiveInstCombine	Change TargetLibraryInfo analysis passes to always require Function	2019-09-07 03:09:36 +00:00
Coroutines	[llvm] Migrate llvm::make_unique to std::make_unique	2019-08-15 15:54:37 +00:00
Hello
InstCombine	[InstCombine] remove unneeded one-use checks for icmp fold	2019-09-16 16:15:25 +00:00
Instrumentation	[PGO] Use linkonce_odr linkage for __profd_ variables in comdat groups	2019-09-16 18:49:09 +00:00
IPO	[Attributor] Heap-To-Stack Conversion	2019-09-15 21:47:41 +00:00
ObjCARC	[ObjC][ARC] Delete ObjC runtime calls on global variables annotated	2019-06-14 22:06:32 +00:00
Scalar	[MemorySSA] Pass (for update) MSSAU when hoisting instructions.	2019-09-12 17:12:51 +00:00
Utils	[SimplifyCFG] FoldTwoEntryPHINode(): consider *total* speculation cost, not per-BB cost	2019-09-16 16:18:24 +00:00
Vectorize	[VPlanSLP] Don't dereference a cast_or_null<VPInstruction> result. NFCI.	2019-09-16 11:22:44 +00:00
CMakeLists.txt
LLVMBuild.txt