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AMDPGU/R600: Replace llvm_unreachable() call with LLVMContext::emitError()

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Summary:
This fixes an issue on MIPS where the infinite-loop-evergreen.ll test
was failing to terminate.

Fixes PR24147.

Reviewers: arsenm, dsanders

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D11260

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242410 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2015-07-16 15:38:29 +00:00
parent acd275a629
commit 2f8588b7a7
1 changed files with 3 additions and 12 deletions
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15
lib/Target/AMDGPU/AMDILCFGStructurizer.cpp
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@ -1732,18 +1732,9 @@ AMDGPUCFGStructurizer::normalizeInfiniteLoopExit(MachineLoop* LoopRep) {
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) {