diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/SCCP.cpp | 29 |
1 files changed, 2 insertions, 27 deletions
diff --git a/llvm/lib/Transforms/Scalar/SCCP.cpp b/llvm/lib/Transforms/Scalar/SCCP.cpp index 32f486744f5..6f4a2ae92ff 100644 --- a/llvm/lib/Transforms/Scalar/SCCP.cpp +++ b/llvm/lib/Transforms/Scalar/SCCP.cpp @@ -1828,33 +1828,8 @@ static bool runIPSCCP(Module &M, const DataLayout &DL, // Ignore blockaddress users; BasicBlock's dtor will handle them. if (!I) continue; - bool Folded = ConstantFoldTerminator(I->getParent()); - if (!Folded) { - // The constant folder may not have been able to fold the terminator - // if this is a branch or switch on undef. Fold it manually as a - // branch to the first successor. -#ifndef NDEBUG - if (auto *BI = dyn_cast<BranchInst>(I)) { - assert(BI->isConditional() && isa<UndefValue>(BI->getCondition()) && - "Branch should be foldable!"); - } else if (auto *SI = dyn_cast<SwitchInst>(I)) { - assert(isa<UndefValue>(SI->getCondition()) && "Switch should fold"); - } else { - llvm_unreachable("Didn't fold away reference to block!"); - } -#endif - - // Make this an uncond branch to the first successor. - TerminatorInst *TI = I->getParent()->getTerminator(); - BranchInst::Create(TI->getSuccessor(0), TI); - - // Remove entries in successor phi nodes to remove edges. - for (unsigned i = 1, e = TI->getNumSuccessors(); i != e; ++i) - TI->getSuccessor(i)->removePredecessor(TI->getParent()); - - // Remove the old terminator. - TI->eraseFromParent(); - } + assert(ConstantFoldTerminator(I->getParent()) && + "Terminator should've been folded"); } // Finally, delete the basic block. |
