[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
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index cbaaea8..23cd088 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -809,6 +809,18 @@
Vals.clear();
}
+ // Emit the ifunc information.
+ for (const GlobalIFunc &I : M->ifuncs()) {
+ // IFUNC: [ifunc type, address space, resolver val#, linkage, visibility]
+ Vals.push_back(VE.getTypeID(I.getValueType()));
+ Vals.push_back(I.getType()->getAddressSpace());
+ Vals.push_back(VE.getValueID(I.getResolver()));
+ Vals.push_back(getEncodedLinkage(I));
+ Vals.push_back(getEncodedVisibility(I));
+ Stream.EmitRecord(bitc::MODULE_CODE_IFUNC, Vals);
+ Vals.clear();
+ }
+
// Emit the module's source file name.
{
StringEncoding Bits = getStringEncoding(M->getSourceFileName().data(),