[PATCH] D11260: AMDPGU/R600: Replace llvm_unreachable() call with LLVMContext::emitError()

[Phabricator]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL242410: AMDPGU/R600: Replace llvm_unreachable() call with LLVMContext::emitError() (authored by tstellar).

Changed prior to commit:
  http://reviews.llvm.org/D11260?vs=29899&id=29916#toc

Repository:
  rL LLVM

http://reviews.llvm.org/D11260

Files:
  llvm/trunk/lib/Target/AMDGPU/AMDILCFGStructurizer.cpp

Index: llvm/trunk/lib/Target/AMDGPU/AMDILCFGStructurizer.cpp
===================================================================
--- llvm/trunk/lib/Target/AMDGPU/AMDILCFGStructurizer.cpp
+++ llvm/trunk/lib/Target/AMDGPU/AMDILCFGStructurizer.cpp
@@ -1732,18 +1732,9 @@
   FuncRep->push_back(DummyExitBlk);  //insert to function
   SHOWNEWBLK(DummyExitBlk, "DummyExitBlock to normalize infiniteLoop: ");
   DEBUG(dbgs() << "Old branch instr: " << *BranchMI << "\n";);
-  MachineBasicBlock::iterator I = BranchMI;
-  unsigned ImmReg = FuncRep->getRegInfo().createVirtualRegister(I32RC);
-  llvm_unreachable("Extra register needed to handle CFG");
-  MachineInstr *NewMI = insertInstrBefore(I, AMDGPU::BRANCH_COND_i32);
-  MachineInstrBuilder MIB(*FuncRep, NewMI);
-  MIB.addMBB(LoopHeader);
-  MIB.addReg(ImmReg, false);
-  SHOWNEWINSTR(NewMI);
-  BranchMI->eraseFromParent();
-  LoopLatch->addSuccessor(DummyExitBlk);
-
-  return DummyExitBlk;
+  LLVMContext &Ctx = LoopHeader->getParent()->getFunction()->getContext();
+  Ctx.emitError("Extra register needed to handle CFG");
+  return nullptr;
 }
 
 void AMDGPUCFGStructurizer::removeUnconditionalBranch(MachineBasicBlock *MBB) {


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