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trunc to bool no longer compares against zero

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35712 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2007-04-07 01:03:46 +00:00
parent 71bf3e2ef9
commit ef4fd35726
1 changed files with 5 additions and 10 deletions
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15
lib/Transforms/IPO/SimplifyLibCalls.cpp
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@@ -847,16 +847,11 @@ struct VISIBILITY_HIDDEN StrLenOptimization : public LibCallOptimization {
static bool IsOnlyUsedInEqualsZeroComparison(Instruction *I) { static bool IsOnlyUsedInEqualsZeroComparison(Instruction *I) {
for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
UI != E; ++UI) { UI != E; ++UI) {
Instruction *User = cast<Instruction>(*UI); if (ICmpInst *IC = dyn_cast<ICmpInst>(*UI))
if (ICmpInst *IC = dyn_cast<ICmpInst>(User)) { if (IC->isEquality())
if ((IC->getPredicate() == ICmpInst::ICMP_NE || if (Constant *C = dyn_cast<Constant>(IC->getOperand(1)))
IC->getPredicate() == ICmpInst::ICMP_EQ) && if (C->isNullValue())
isa<Constant>(IC->getOperand(1)) && continue;
cast<Constant>(IC->getOperand(1))->isNullValue())
continue;
} else if (CastInst *CI = dyn_cast<CastInst>(User))
if (CI->getType() == Type::Int1Ty)
continue;
// Unknown instruction. // Unknown instruction.
return false; return false;
} }