From c554145f4d7063422a5e105e2b600b640cf3d8d1 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Wed, 14 Jun 2017 00:01:06 +0200
Subject: Move stack height to generation phase.

---
 libjulia/backends/evm/EVMCodeTransform.cpp | 12 +++++-------
 libjulia/backends/evm/EVMCodeTransform.h   |  6 ++++--
 libsolidity/inlineasm/AsmScope.h           |  2 --
 3 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/libjulia/backends/evm/EVMCodeTransform.cpp b/libjulia/backends/evm/EVMCodeTransform.cpp
index 638ff4d9..7c14eb8b 100644
--- a/libjulia/backends/evm/EVMCodeTransform.cpp
+++ b/libjulia/backends/evm/EVMCodeTransform.cpp
@@ -64,8 +64,7 @@ void CodeTransform::operator()(VariableDeclaration const& _varDecl)
 	for (auto const& variable: _varDecl.variables)
 	{
 		auto& var = boost::get<Scope::Variable>(m_scope->identifiers.at(variable.name));
-		var.stackHeight = height++;
-		var.active = true;
+		m_context->variableStackHeights[&var] = height++;
 	}
 	checkStackHeight(&_varDecl);
 }
@@ -288,8 +287,7 @@ void CodeTransform::operator()(FunctionDefinition const& _function)
 	for (auto const& v: _function.arguments | boost::adaptors::reversed)
 	{
 		auto& var = boost::get<Scope::Variable>(varScope->identifiers.at(v.name));
-		var.stackHeight = height++;
-		var.active = true;
+		m_context->variableStackHeights[&var] = height++;
 	}
 
 	m_assembly.setSourceLocation(_function.location);
@@ -311,8 +309,7 @@ void CodeTransform::operator()(FunctionDefinition const& _function)
 	for (auto const& v: _function.returns)
 	{
 		auto& var = boost::get<Scope::Variable>(varScope->identifiers.at(v.name));
-		var.stackHeight = height++;
-		var.active = true;
+		m_context->variableStackHeights[&var] = height++;
 		// Preset stack slots for return variables to zero.
 		m_assembly.appendConstant(u256(0));
 	}
@@ -427,7 +424,8 @@ void CodeTransform::generateAssignment(Identifier const& _variableName)
 
 int CodeTransform::variableHeightDiff(solidity::assembly::Scope::Variable const& _var, bool _forSwap)
 {
-	int heightDiff = m_assembly.stackHeight() - _var.stackHeight;
+	solAssert(m_context->variableStackHeights.count(&_var), "");
+	int heightDiff = m_assembly.stackHeight() - m_context->variableStackHeights[&_var];
 	if (heightDiff <= (_forSwap ? 1 : 0) || heightDiff > (_forSwap ? 17 : 16))
 	{
 		solUnimplemented(
diff --git a/libjulia/backends/evm/EVMCodeTransform.h b/libjulia/backends/evm/EVMCodeTransform.h
index 57781c91..202f5051 100644
--- a/libjulia/backends/evm/EVMCodeTransform.h
+++ b/libjulia/backends/evm/EVMCodeTransform.h
@@ -81,8 +81,10 @@ public:
 protected:
 	struct Context
 	{
-		std::map<solidity::assembly::Scope::Label const*, AbstractAssembly::LabelID> labelIDs;
-		std::map<solidity::assembly::Scope::Function const*, AbstractAssembly::LabelID> functionEntryIDs;
+		using Scope = solidity::assembly::Scope;
+		std::map<Scope::Label const*, AbstractAssembly::LabelID> labelIDs;
+		std::map<Scope::Function const*, AbstractAssembly::LabelID> functionEntryIDs;
+		std::map<Scope::Variable const*, int> variableStackHeights;
 	};
 
 	CodeTransform(
diff --git a/libsolidity/inlineasm/AsmScope.h b/libsolidity/inlineasm/AsmScope.h
index 5e22c6e7..23cf61f2 100644
--- a/libsolidity/inlineasm/AsmScope.h
+++ b/libsolidity/inlineasm/AsmScope.h
@@ -67,8 +67,6 @@ struct Scope
 
 	struct Variable
 	{
-		/// Used during code generation to store the stack height. @todo move there.
-		int stackHeight = 0;
 		/// Used during analysis to check whether we already passed the declaration inside the block.
 		/// @todo move there.
 		bool active = false;
-- 
cgit