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Use side effects of user-defined functions in other optimizer steps.

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This commit is contained in:
chriseth
2021-11-02 11:59:01 +01:00
parent 5eb97fa6ee
commit d6c461ed61
8 changed files with 88 additions and 32 deletions
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libyul/optimiser/DeadCodeEliminator.cpp
+7 -2
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@@ -22,6 +22,7 @@
#include <libyul/optimiser/DeadCodeEliminator.h>
#include <libyul/optimiser/Semantics.h>
#include <libyul/optimiser/OptimiserStep.h>
#include <libyul/ControlFlowSideEffectsCollector.h>
#include <libyul/AST.h>
#include <libevmasm/SemanticInformation.h>
@@ -36,7 +37,11 @@ using namespace solidity::yul;
void DeadCodeEliminator::run(OptimiserStepContext& _context, Block& _ast)
{
DeadCodeEliminator{_context.dialect}(_ast);
ControlFlowSideEffectsCollector sideEffects(_context.dialect, _ast);
DeadCodeEliminator{
_context.dialect,
sideEffects.functionSideEffects()
}(_ast);
}
void DeadCodeEliminator::operator()(ForLoop& _for)
@@ -49,7 +54,7 @@ void DeadCodeEliminator::operator()(Block& _block)
{
TerminationFinder::ControlFlow controlFlowChange;
size_t index;
tie(controlFlowChange, index) = TerminationFinder{m_dialect}.firstUnconditionalControlFlowChange(_block.statements);
tie(controlFlowChange, index) = TerminationFinder{m_dialect, &m_functionSideEffects}.firstUnconditionalControlFlowChange(_block.statements);
// Erase everything after the terminating statement that is not a function definition.
if (controlFlowChange != TerminationFinder::ControlFlow::FlowOut && index != std::numeric_limits<size_t>::max())