From 00dff8dda29b5a249cd99405ce26e84cef13ba53 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Thu, 31 Jan 2008 00:27:49 +0000 Subject: [PATCH] Also avoid adding callee save code before debug labels. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46586 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/PrologEpilogInserter.cpp | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp index 0280318bb7e..c990ba4776f 100644 --- a/lib/CodeGen/PrologEpilogInserter.cpp +++ b/lib/CodeGen/PrologEpilogInserter.cpp @@ -243,11 +243,19 @@ void PEI::saveCalleeSavedRegisters(MachineFunction &Fn) { return; const TargetInstrInfo &TII = *Fn.getTarget().getInstrInfo(); - + // Now that we have a stack slot for each register to be saved, insert spill // code into the entry block. MachineBasicBlock *MBB = Fn.begin(); MachineBasicBlock::iterator I = MBB->begin(); + + // Do not insert prologue code before debug LABELs at the start of the + // entry block. + MachineModuleInfo *MMI = FFI->getMachineModuleInfo(); + if (MMI && MMI->hasDebugInfo()) + while (I != MBB->end() && I->getOpcode() == TargetInstrInfo::LABEL) + ++I; + if (!TII.spillCalleeSavedRegisters(*MBB, I, CSI)) { for (unsigned i = 0, e = CSI.size(); i != e; ++i) { // Add the callee-saved register as live-in. It's killed at the spill.