implement a new magic global "llvm.compiler.used" which is like llvm.used, but
doesn't cause ".no_dead_strip" to be emitted on darwin.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76399 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index a2d154f..80bdf04 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -466,13 +466,13 @@
/// special global used by LLVM. If so, emit it and return true, otherwise
/// do nothing and return false.
bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
- if (GV->getName() == "llvm.used") {
+ if (GV->isName("llvm.used")) {
if (TAI->getUsedDirective() != 0) // No need to emit this at all.
EmitLLVMUsedList(GV->getInitializer());
return true;
}
- // Ignore debug and non-emitted data.
+ // Ignore debug and non-emitted data. This handles llvm.compiler.used.
if (GV->getSection() == "llvm.metadata" ||
GV->hasAvailableExternallyLinkage())
return true;
diff --git a/lib/CodeGen/AsmPrinter/DwarfException.cpp b/lib/CodeGen/AsmPrinter/DwarfException.cpp
index 1af3b11..fdec97a 100644
--- a/lib/CodeGen/AsmPrinter/DwarfException.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfException.cpp
@@ -229,7 +229,7 @@
// retains the function in this case, and there is code around that depends
// on unused functions (calling undefined externals) being dead-stripped to
// link correctly. Yes, there really is.
- if (MMI->getUsedFunctions().count(EHFrameInfo.function))
+ if (MMI->isUsedFunction(EHFrameInfo.function))
if (const char *UsedDirective = TAI->getUsedDirective())
O << UsedDirective << EHFrameInfo.FnName << "\n\n";
}
diff --git a/lib/CodeGen/MachineModuleInfo.cpp b/lib/CodeGen/MachineModuleInfo.cpp
index 66dd837..20b819e 100644
--- a/lib/CodeGen/MachineModuleInfo.cpp
+++ b/lib/CodeGen/MachineModuleInfo.cpp
@@ -88,7 +88,8 @@
/// AnalyzeModule - Scan the module for global debug information.
///
void MachineModuleInfo::AnalyzeModule(Module &M) {
- // Insert functions in the llvm.used array into UsedFunctions.
+ // Insert functions in the llvm.used array (but not llvm.compiler.used) into
+ // UsedFunctions.
GlobalVariable *GV = M.getGlobalVariable("llvm.used");
if (!GV || !GV->hasInitializer()) return;