Only get the .bss and .data sections when needed instead of unconditionally.
This allows is to not emit empty sections when .data or .bss is not used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22457 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/ELFWriter.cpp b/lib/CodeGen/ELFWriter.cpp
index afd6c3b..d53afde 100644
--- a/lib/CodeGen/ELFWriter.cpp
+++ b/lib/CodeGen/ELFWriter.cpp
@@ -223,8 +223,7 @@
return false;
}
-void ELFWriter::EmitGlobal(GlobalVariable *GV, ELFSection &DataSection,
- ELFSection &BSSSection) {
+void ELFWriter::EmitGlobal(GlobalVariable *GV) {
// If this is an external global, emit it now. TODO: Note that it would be
// better to ignore the symbol here and only add it to the symbol table if
// referenced.
@@ -264,6 +263,7 @@
// Handle alignment. Ensure section is aligned at least as much as required
// by this symbol.
+ ELFSection &BSSSection = getBSSSection();
BSSSection.Align = std::max(BSSSection.Align, Align);
// Within the section, emit enough virtual padding to get us to an alignment
@@ -315,17 +315,9 @@
bool ELFWriter::doFinalization(Module &M) {
// Okay, the ELF header and .text sections have been completed, build the
// .data, .bss, and "common" sections next.
- ELFSection &DataSection =
- getSection(".data", ELFSection::SHT_PROGBITS,
- ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC);
-
- ELFSection &BSSSection =
- getSection(".bss", ELFSection::SHT_NOBITS,
- ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC);
-
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
- EmitGlobal(I, DataSection, BSSSection);
+ EmitGlobal(I);
// Emit the symbol table now, if non-empty.
EmitSymbolTable();