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Don't iterate through the whole block just to find the PHI nodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101900 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -211,13 +211,10 @@ void FunctionLoweringInfo::set(const Function &fn, MachineFunction &mf,
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// Create Machine PHI nodes for LLVM PHI nodes, lowering them as
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// appropriate.
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const PHINode *PN;
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DebugLoc DL;
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for (BasicBlock::const_iterator
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I = BB->begin(), E = BB->end(); I != E; ++I) {
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PN = dyn_cast<PHINode>(I);
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if (!PN || PN->use_empty()) continue;
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for (BasicBlock::const_iterator I = BB->begin();
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const PHINode *PN = dyn_cast<PHINode>(I); ++I) {
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if (PN->use_empty()) continue;
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unsigned PHIReg = ValueMap[PN];
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assert(PHIReg && "PHI node does not have an assigned virtual register!");
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