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Extract side effects into their own struct.

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chriseth
2019-08-14 15:06:10 +02:00
parent d5744b3c1c
commit 7d30fbdef0
8 changed files with 136 additions and 107 deletions
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libyul/optimiser/Semantics.h
+7 -17
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@@ -21,6 +21,7 @@
#pragma once
#include <libyul/optimiser/ASTWalker.h>
#include <libyul/SideEffects.h>
#include <set>
@@ -44,32 +45,21 @@ public:
void operator()(FunctionalInstruction const& _functionalInstruction) override;
void operator()(FunctionCall const& _functionCall) override;
bool movable() const { return m_movable; }
bool movable() const { return m_sideEffects.movable; }
bool sideEffectFree(bool _allowMSizeModification = false) const
{
if (_allowMSizeModification)
return sideEffectFreeIfNoMSize();
else
return m_sideEffectFree;
return m_sideEffects.sideEffectFree;
}
bool sideEffectFreeIfNoMSize() const { return m_sideEffectFreeIfNoMSize; }
bool invalidatesStorage() const { return m_invalidatesStorage; }
bool invalidatesMemory() const { return m_invalidatesMemory; }
bool sideEffectFreeIfNoMSize() const { return m_sideEffects.sideEffectFreeIfNoMSize; }
bool invalidatesStorage() const { return m_sideEffects.invalidatesStorage; }
bool invalidatesMemory() const { return m_sideEffects.invalidatesMemory; }
private:
Dialect const& m_dialect;
/// Is the current expression movable or not.
bool m_movable = true;
/// Is the current expression side-effect free, i.e. can be removed
/// without changing the semantics.
bool m_sideEffectFree = true;
/// Is the current expression side-effect free up to msize, i.e. can be removed
/// without changing the semantics except for the value returned by the msize instruction.
bool m_sideEffectFreeIfNoMSize = true;
/// If false, storage is guaranteed to be unchanged by the code under all
/// circumstances.
bool m_invalidatesStorage = false;
bool m_invalidatesMemory = false;
SideEffects m_sideEffects;
};
/**