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author | Evan Cheng <evan.cheng@apple.com> | 2008-01-31 00:27:49 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2008-01-31 00:27:49 +0000 |
commit | 00dff8dda29b5a249cd99405ce26e84cef13ba53 (patch) | |
tree | 4d3609905d188632c4ca53e52f1cc6fd30bb60e5 /lib/CodeGen/PrologEpilogInserter.cpp | |
parent | c6c391daddbafa722d9ca87d18f204e9a6e617a3 (diff) | |
download | external_llvm-00dff8dda29b5a249cd99405ce26e84cef13ba53.zip external_llvm-00dff8dda29b5a249cd99405ce26e84cef13ba53.tar.gz external_llvm-00dff8dda29b5a249cd99405ce26e84cef13ba53.tar.bz2 |
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
Diffstat (limited to 'lib/CodeGen/PrologEpilogInserter.cpp')
-rw-r--r-- | lib/CodeGen/PrologEpilogInserter.cpp | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp index 0280318..c990ba4 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. |