From f22d1f5912e5372826a1910d36881ac422c65591 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 2 May 2003 18:44:42 +0000 Subject: [PATCH] Fix a bug which occurred with empty basic blocks llvm-svn: 5982 --- llvm/lib/CodeGen/PrologEpilogInserter.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/llvm/lib/CodeGen/PrologEpilogInserter.cpp b/llvm/lib/CodeGen/PrologEpilogInserter.cpp index 2f7f1f4ef30a..4839c09751db 100644 --- a/llvm/lib/CodeGen/PrologEpilogInserter.cpp +++ b/llvm/lib/CodeGen/PrologEpilogInserter.cpp @@ -160,7 +160,7 @@ void PEI::saveCallerSavedRegisters(MachineFunction &Fn) { const TargetInstrInfo &TII = Fn.getTarget().getInstrInfo(); for (MachineFunction::iterator FI = Fn.begin(), E = Fn.end(); FI != E; ++FI) { // If last instruction is a return instruction, add an epilogue - if (TII.isReturn(FI->back()->getOpcode())) { + if (!FI->empty() && TII.isReturn(FI->back()->getOpcode())) { MBB = FI; I = MBB->end()-1; for (unsigned i = 0, e = RegsToSave.size(); i != e; ++i) {