From 49b11121179040d438dd8795a710f3d9de3de789 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Thu, 1 Jun 2017 14:16:12 +0200
Subject: For loops analysis.

---
 libsolidity/inlineasm/AsmAnalysis.cpp    | 26 ++++++++++++++++++++++++--
 libsolidity/inlineasm/AsmScopeFiller.cpp | 19 +++++++++++++++++--
 2 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/libsolidity/inlineasm/AsmAnalysis.cpp b/libsolidity/inlineasm/AsmAnalysis.cpp
index 68c940e7..548f1a74 100644
--- a/libsolidity/inlineasm/AsmAnalysis.cpp
+++ b/libsolidity/inlineasm/AsmAnalysis.cpp
@@ -310,9 +310,31 @@ bool AsmAnalyzer::operator()(Switch const& _switch)
 	return success;
 }
 
-bool AsmAnalyzer::operator()(assembly::ForLoop const&)
+bool AsmAnalyzer::operator()(assembly::ForLoop const& _for)
 {
-	solAssert(false, "For loop not supported.");
+	Scope* originalScope = m_currentScope;
+
+	bool success = true;
+	if (!(*this)(_for.pre))
+		success = false;
+	// The block was closed already, but we re-open it again and stuff the
+	// condition, the body and the post part inside.
+	m_stackHeight += scope(&_for.pre).numberOfVariables();
+	m_currentScope = &scope(&_for.pre);
+
+	if (!expectExpression(*_for.condition))
+		success = false;
+	m_stackHeight--;
+	if (!(*this)(_for.body))
+		success = false;
+	if (!(*this)(_for.post))
+		success = false;
+
+	m_stackHeight -= scope(&_for.pre).numberOfVariables();
+	m_info.stackHeightInfo[&_for] = m_stackHeight;
+	m_currentScope = originalScope;
+
+	return success;
 }
 
 bool AsmAnalyzer::operator()(Block const& _block)
diff --git a/libsolidity/inlineasm/AsmScopeFiller.cpp b/libsolidity/inlineasm/AsmScopeFiller.cpp
index 1aac902a..3bef9cec 100644
--- a/libsolidity/inlineasm/AsmScopeFiller.cpp
+++ b/libsolidity/inlineasm/AsmScopeFiller.cpp
@@ -111,9 +111,24 @@ bool ScopeFiller::operator()(Switch const& _switch)
 	return success;
 }
 
-bool ScopeFiller::operator()(ForLoop const&)
+bool ScopeFiller::operator()(ForLoop const& _forLoop)
 {
-	solAssert(false, "For loop not supported.");
+	Scope* originalScope = m_currentScope;
+
+	bool success = true;
+	if (!(*this)(_forLoop.pre))
+		success = false;
+	m_currentScope = &scope(&_forLoop.pre);
+	if (!boost::apply_visitor(*this, *_forLoop.condition))
+		success = false;
+	if (!(*this)(_forLoop.body))
+		success = false;
+	if (!(*this)(_forLoop.post))
+		success = false;
+
+	m_currentScope = originalScope;
+
+	return success;
 }
 
 bool ScopeFiller::operator()(Block const& _block)
-- 
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