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Limit the number of times we recurse through this algorithm. All of the

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intructions are processed. So there's no need to look at them if they're used as
operands of other instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155327 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2012-04-23 00:22:55 +00:00
parent b14940a047
commit 098c595dd2
1 changed files with 17 additions and 5 deletions
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22
lib/VMCore/Module.cpp
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@ -505,22 +505,30 @@ namespace {
incorporateValue(Aliasee);
}
SmallVector<std::pair<unsigned, MDNode*>, 4> MDForInst;
// Get types from functions.
SmallVector<std::pair<unsigned, MDNode*>, 4> MDForInst;
for (Module::const_iterator FI = M.begin(), E = M.end(); FI != E; ++FI) {
incorporateType(FI->getType());
// First incorporate the arguments.
for (Function::const_arg_iterator AI = FI->arg_begin(),
AE = FI->arg_end(); AI != AE; ++AI)
incorporateValue(AI);
for (Function::const_iterator BB = FI->begin(), E = FI->end();
BB != E;++BB)
for (BasicBlock::const_iterator II = BB->begin(),
E = BB->end(); II != E; ++II) {
const Instruction &I = *II;
// Incorporate the type of the instruction and all its operands.
// Incorporate the type of the instruction.
incorporateType(I.getType());
// Incorporate non-instruction operand types. (We are incorporating
// all instructions with this loop.)
for (User::const_op_iterator OI = I.op_begin(), OE = I.op_end();
OI != OE; ++OI)
incorporateValue(*OI);
if (!isa<Instruction>(OI))
incorporateValue(*OI);
// Incorporate types hiding in metadata.
I.getAllMetadataOtherThanDebugLoc(MDForInst);
@ -570,7 +578,11 @@ namespace {
// Check this type.
incorporateType(V->getType());
// If this is an instruction, we incorporate it separately.
if (isa<Instruction>(V))
return;
// Look in operands for types.
const User *U = cast<User>(V);
for (Constant::const_op_iterator I = U->op_begin(),