[MergeICmps] Try to fix MSVC build failure

Apparently this fails to line up the types -- try to sidestep the issue entirely by writing the code in a more reasonable way: Walk over the operands and perform a set lookup, rather than walking over the set and performing an operand scan.

Author: nikic

llvm/lib/Transforms/Scalar/MergeICmps.cpp

@@ -256,11 +256,10 @@ bool BCECmpBlock::canSinkBCECmpInst(const Instruction *Inst,
  }
  // Make sure this instruction does not use any of the BCE cmp block
  // instructions as operand.
- for (auto BI : BlockInsts) {
- if (is_contained(Inst->operands(), BI))
- return false;
- }
- return true;
+ return llvm::none_of(Inst->operands(), [&](const Value *Op) {
+ const Instruction *OpI = dyn_cast<Instruction>(Op);
+ return OpI && BlockInsts.contains(OpI);
+ });
 }
 
 void BCECmpBlock::split(BasicBlock *NewParent, AliasAnalysis &AA) const {