If there's no instructions being emitted on X86 for a function, emit a
nop. Emit the nop directly for PPC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46398 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ATTAsmPrinter.cpp b/lib/Target/X86/X86ATTAsmPrinter.cpp
index 8198fbe..20f2f00 100644
--- a/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -165,6 +165,16 @@
DW.BeginFunction(&MF);
}
+ if (Subtarget->isTargetDarwin()) {
+ // If the function is empty, then we need to emit *something*. Otherwise,
+ // the function's label might be associated with something that it wasn't
+ // meant to be associated with. We emit a noop in this situation.
+ MachineFunction::iterator I = MF.begin();
+
+ if (++I == MF.end() && MF.front().empty())
+ O << "\tnop\n";
+ }
+
// Print out code for the function.
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
@@ -173,8 +183,8 @@
printBasicBlockLabel(I, true);
O << '\n';
}
- for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
- II != E; ++II) {
+ for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
+ II != IE; ++II) {
// Print the assembly for the instruction.
O << "\t";
printMachineInstruction(II);