MC/Mach-O/x86_64: Add a new hook for checking whether a particular section can
be diced into atoms, and adjust getAtom() to take this into account.
- This fixes relocations to symbols in fixed size literal sections, for
example.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103532 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86AsmBackend.cpp b/lib/Target/X86/X86AsmBackend.cpp
index b72601a..8ee836e 100644
--- a/lib/Target/X86/X86AsmBackend.cpp
+++ b/lib/Target/X86/X86AsmBackend.cpp
@@ -259,6 +259,26 @@
const MCSectionMachO &SMO = static_cast<const MCSectionMachO&>(Section);
return SMO.getType() == MCSectionMachO::S_CSTRING_LITERALS;
}
+
+ virtual bool isSectionAtomizable(const MCSection &Section) const {
+ const MCSectionMachO &SMO = static_cast<const MCSectionMachO&>(Section);
+ // Fixed sized data sections are uniqued, they cannot be diced into atoms.
+ switch (SMO.getType()) {
+ default:
+ return true;
+
+ case MCSectionMachO::S_4BYTE_LITERALS:
+ case MCSectionMachO::S_8BYTE_LITERALS:
+ case MCSectionMachO::S_16BYTE_LITERALS:
+ case MCSectionMachO::S_LITERAL_POINTERS:
+ case MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS:
+ case MCSectionMachO::S_LAZY_SYMBOL_POINTERS:
+ case MCSectionMachO::S_MOD_INIT_FUNC_POINTERS:
+ case MCSectionMachO::S_MOD_TERM_FUNC_POINTERS:
+ case MCSectionMachO::S_INTERPOSING:
+ return false;
+ }
+ }
};
}