[Outliner] Revert r298734.

When I tested r298734, I thought that red zones were enabled by default like in
X86. Since red zones are behind a flag on AArch64 the testing wasn't true.

llvm-svn: 298747

diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
index 2868d8c..24fc7d3 100644 (file)
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -4280,7 +4280,7 @@ unsigned AArch64InstrInfo::getOutliningBenefit(size_t SequenceSize,
 }
 
 bool AArch64InstrInfo::isFunctionSafeToOutlineFrom(MachineFunction &MF) const {
-  return true;
+  return MF.getFunction()->hasFnAttribute(Attribute::NoRedZone);
 }
 
 AArch64GenInstrInfo::MachineOutlinerInstrType