From 438900938c3ac9d7fac2dd5d2c85ca4b9b2e35f7 Mon Sep 17 00:00:00 2001 From: Rafael Espindola Date: Thu, 3 Oct 2013 18:29:09 +0000 Subject: Optimize linkonce_odr unnamed_addr functions during LTO. Generalize the API so we can distinguish symbols that are needed just for a DSO symbol table from those that are used from some native .o. The symbols that are only wanted for the dso symbol table can be dropped if llvm can prove every other dso has a copy (linkonce_odr) and the address is not important (unnamed_addr). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191922 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/LTO/LTOCodeGenerator.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/llvm/LTO') diff --git a/include/llvm/LTO/LTOCodeGenerator.h b/include/llvm/LTO/LTOCodeGenerator.h index 97a5066..9f50770 100644 --- a/include/llvm/LTO/LTOCodeGenerator.h +++ b/include/llvm/LTO/LTOCodeGenerator.h @@ -73,6 +73,10 @@ struct LTOCodeGenerator { void addMustPreserveSymbol(const char *sym) { MustPreserveSymbols[sym] = 1; } + void addDSOSymbol(const char* Sym) { + DSOSymbols[Sym] = 1; + } + // To pass options to the driver and optimization passes. These options are // not necessarily for debugging purpose (The function name is misleading). // This function should be called before LTOCodeGenerator::compilexxx(), @@ -126,6 +130,7 @@ private: void applyScopeRestrictions(); void applyRestriction(llvm::GlobalValue &GV, std::vector &MustPreserveList, + std::vector &SymtabList, llvm::SmallPtrSet &AsmUsed, llvm::Mangler &Mangler); bool determineTarget(std::string &errMsg); @@ -138,6 +143,7 @@ private: bool EmitDwarfDebugInfo; bool ScopeRestrictionsDone; lto_codegen_model CodeModel; + StringSet DSOSymbols; StringSet MustPreserveSymbols; StringSet AsmUndefinedRefs; llvm::MemoryBuffer *NativeObjectFile; -- cgit v1.1