From a1feff7024b552b579f302fea0030aaaa14624b3 Mon Sep 17 00:00:00 2001 From: Dmitry Polukhin Date: Thu, 7 Apr 2016 12:32:19 +0000 Subject: [GCC] Attribute ifunc support in llvm This patch add support for GCC attribute((ifunc("resolver"))) for targets that use ELF as object file format. In general ifunc is a special kind of function alias with type @gnu_indirect_function. Patch for Clang http://reviews.llvm.org/D15524 Differential Revision: http://reviews.llvm.org/D15525 llvm-svn: 265667 --- llvm/lib/Bitcode/Reader/BitcodeReader.cpp | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp') diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp index 0e74fe3..b8ebe8f 100644 --- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp +++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp @@ -3658,6 +3658,8 @@ std::error_code BitcodeReader::parseModule(uint64_t ResumeBit, } // ALIAS: [alias type, addrspace, aliasee val#, linkage] // ALIAS: [alias type, addrspace, aliasee val#, linkage, visibility, dllstorageclass] + // IFUNC: [alias type, addrspace, aliasee val#, linkage, visibility, dllstorageclass] + case bitc::MODULE_CODE_IFUNC: case bitc::MODULE_CODE_ALIAS: case bitc::MODULE_CODE_ALIAS_OLD: { bool NewRecord = BitCode != bitc::MODULE_CODE_ALIAS_OLD; @@ -3684,10 +3686,11 @@ std::error_code BitcodeReader::parseModule(uint64_t ResumeBit, GlobalIndirectSymbol *NewGA; if (BitCode == bitc::MODULE_CODE_ALIAS || BitCode == bitc::MODULE_CODE_ALIAS_OLD) - NewGA = GlobalAlias::create( - Ty, AddrSpace, getDecodedLinkage(Linkage), "", TheModule); + NewGA = GlobalAlias::create(Ty, AddrSpace, getDecodedLinkage(Linkage), + "", TheModule); else - llvm_unreachable("Not an alias!"); + NewGA = GlobalIFunc::create(Ty, AddrSpace, getDecodedLinkage(Linkage), + "", nullptr, TheModule); // Old bitcode files didn't have visibility field. // Local linkage must have default visibility. if (OpNum != Record.size()) { -- cgit v1.1