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Use unordered_set in ReadableOrderTraverser.

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Previously we are using unordered_map to map to bool, which can
be simplified with unordered_set.
This commit is contained in:
Lei Zhang 2017-05-11 20:46:01 -04:00 committed by Lei Zhang
parent d9b08d5c3d
commit 2840f63fbc
1 changed files with 8 additions and 8 deletions
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16
SPIRV/InReadableOrder.cpp
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@ -51,7 +51,7 @@
#include "spvIR.h"
#include <cassert>
#include <unordered_map>
#include <unordered_set>
using spv::Block;
using spv::Id;
@ -69,33 +69,33 @@ public:
void visit(Block* block)
{
assert(block);
if (visited_[block] || delayed_[block])
if (visited_.count(block) || delayed_.count(block))
return;
callback_(block);
visited_[block] = true;
visited_.insert(block);
Block* mergeBlock = nullptr;
Block* continueBlock = nullptr;
auto mergeInst = block->getMergeInstruction();
if (mergeInst) {
Id mergeId = mergeInst->getIdOperand(0);
mergeBlock = block->getParent().getParent().getInstruction(mergeId)->getBlock();
delayed_[mergeBlock] = true;
delayed_.insert(mergeBlock);
if (mergeInst->getOpCode() == spv::OpLoopMerge) {
Id continueId = mergeInst->getIdOperand(1);
continueBlock =
block->getParent().getParent().getInstruction(continueId)->getBlock();
delayed_[continueBlock] = true;
delayed_.insert(continueBlock);
}
}
const auto successors = block->getSuccessors();
for (auto it = successors.cbegin(); it != successors.cend(); ++it)
visit(*it);
if (continueBlock) {
delayed_[continueBlock] = false;
delayed_.erase(continueBlock);
visit(continueBlock);
}
if (mergeBlock) {
delayed_[mergeBlock] = false;
delayed_.erase(mergeBlock);
visit(mergeBlock);
}
}
@ -103,7 +103,7 @@ public:
private:
std::function<void(Block*)> callback_;
// Whether a block has already been visited or is being delayed.
std::unordered_map<Block *, bool> visited_, delayed_;
std::unordered_set<Block *> visited_, delayed_;
};
}