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avoid unnecessary reallocations in GetOperandConstants (#4708)

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reserve capacity since we know the size exactly
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pd-valve 2022-02-10 10:31:24 -08:00 committed by GitHub
parent 44923beb52
commit 940127a77d
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source/opt/constants.cpp
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@ -158,6 +158,7 @@ Type* ConstantManager::GetType(const Instruction* inst) const {
std::vector<const Constant*> ConstantManager::GetOperandConstants( std::vector<const Constant*> ConstantManager::GetOperandConstants(
const Instruction* inst) const { const Instruction* inst) const {
std::vector<const Constant*> constants; std::vector<const Constant*> constants;
constants.reserve(inst->NumInOperands());
for (uint32_t i = 0; i < inst->NumInOperands(); i++) { for (uint32_t i = 0; i < inst->NumInOperands(); i++) {
const Operand* operand = &inst->GetInOperand(i); const Operand* operand = &inst->GetInOperand(i);
if (operand->type != SPV_OPERAND_TYPE_ID) { if (operand->type != SPV_OPERAND_TYPE_ID) {