[GlobalISel] Teach the core pipeline not to run if ISel failed.

llvm-svn: 279889

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp b/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
index 4ef4c43f763..302c3763d00 100644
--- a/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
@@ -43,6 +43,11 @@ static void reportSelectionError(const MachineInstr &MI, const Twine &Message) {
 }
 
 bool InstructionSelect::runOnMachineFunction(MachineFunction &MF) {
+  // If the ISel pipeline failed, do not bother running that pass.
+  if (MF.getProperties().hasProperty(
+          MachineFunctionProperties::Property::FailedISel))
+    return false;
+
   DEBUG(dbgs() << "Selecting function: " << MF.getName() << '\n');
 
   const InstructionSelector *ISel = MF.getSubtarget().getInstructionSelector();