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trunc to bool no longer compares against zero
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35712 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -847,16 +847,11 @@ struct VISIBILITY_HIDDEN StrLenOptimization : public LibCallOptimization {
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static bool IsOnlyUsedInEqualsZeroComparison(Instruction *I) {
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for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
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UI != E; ++UI) {
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Instruction *User = cast<Instruction>(*UI);
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if (ICmpInst *IC = dyn_cast<ICmpInst>(User)) {
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if ((IC->getPredicate() == ICmpInst::ICMP_NE ||
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IC->getPredicate() == ICmpInst::ICMP_EQ) &&
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isa<Constant>(IC->getOperand(1)) &&
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cast<Constant>(IC->getOperand(1))->isNullValue())
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continue;
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} else if (CastInst *CI = dyn_cast<CastInst>(User))
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if (CI->getType() == Type::Int1Ty)
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continue;
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if (ICmpInst *IC = dyn_cast<ICmpInst>(*UI))
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if (IC->isEquality())
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if (Constant *C = dyn_cast<Constant>(IC->getOperand(1)))
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if (C->isNullValue())
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continue;
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// Unknown instruction.
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return false;
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}
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