[llvm-commits] CVS: llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
Chris Lattner
lattner at cs.uiuc.edu
Fri Dec 9 10:24:41 PST 2005
Changes in directory llvm/lib/Target/PowerPC:
PPCAsmPrinter.cpp updated: 1.122 -> 1.123
---
Log message:
Teach the PPC backend about the ctor and dtor list when not using __main and
linking the entire program into one bc file.
---
Diffs of the changes: (+34 -0)
PPCAsmPrinter.cpp | 34 ++++++++++++++++++++++++++++++++++
1 files changed, 34 insertions(+)
Index: llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
diff -u llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp:1.122 llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp:1.123
--- llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp:1.122 Wed Nov 30 12:54:35 2005
+++ llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp Fri Dec 9 12:24:29 2005
@@ -202,6 +202,8 @@
virtual const char *getPassName() const {
return "Darwin PPC Assembly Printer";
}
+
+ void EmitXXStructorList(Constant *List);
bool runOnMachineFunction(MachineFunction &F);
bool doInitialization(Module &M);
@@ -412,6 +414,21 @@
return false;
}
+/// EmitXXStructorList - Emit the ctor or dtor list. On darwin, this just
+/// prints out the function pointers.
+void DarwinAsmPrinter::EmitXXStructorList(Constant *List) {
+ // Should be an array of '{ int, void ()* }' structs. The first value is the
+ // init priority, which we ignore.
+ if (!isa<ConstantArray>(List)) return;
+ ConstantArray *InitList = cast<ConstantArray>(List);
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
+ if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
+ if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
+ // Emit the function pointer.
+ EmitGlobalConstant(CS->getOperand(1));
+ }
+}
+
bool DarwinAsmPrinter::doFinalization(Module &M) {
const TargetData &TD = TM.getTargetData();
@@ -419,6 +436,23 @@
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
if (I->hasInitializer()) { // External global require no code
+ // Check to see if this is a special global used by LLVM.
+ if (I->hasAppendingLinkage()) {
+ if (I->getName() == "llvm.used")
+ continue; // No need to emit this at all.
+ if (I->getName() == "llvm.global_ctors") {
+ SwitchSection(".mod_init_func", 0);
+ EmitAlignment(2, 0);
+ EmitXXStructorList(I->getInitializer());
+ continue;
+ } else if (I->getName() == "llvm.global_dtors") {
+ SwitchSection(".mod_term_func", 0);
+ EmitAlignment(2, 0);
+ EmitXXStructorList(I->getInitializer());
+ continue;
+ }
+ }
+
O << '\n';
std::string name = Mang->getValueName(I);
Constant *C = I->getInitializer();
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