From 831ed083875b73faf91f9d3335e2599540366712 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Wed, 24 May 2017 11:47:43 +0200
Subject: Change invalid opcode to revert for input validation.

---
 libsolidity/codegen/CompilerContext.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'libsolidity/codegen/CompilerContext.cpp')

diff --git a/libsolidity/codegen/CompilerContext.cpp b/libsolidity/codegen/CompilerContext.cpp
index 9d0d6d37..1937b529 100644
--- a/libsolidity/codegen/CompilerContext.cpp
+++ b/libsolidity/codegen/CompilerContext.cpp
@@ -244,6 +244,20 @@ CompilerContext& CompilerContext::appendConditionalInvalid()
 	return *this;
 }
 
+CompilerContext& CompilerContext::appendRevert()
+{
+	return *this << u256(0) << u256(0) << Instruction::REVERT;
+}
+
+CompilerContext& CompilerContext::appendConditionalRevert()
+{
+	*this << Instruction::ISZERO;
+	eth::AssemblyItem afterTag = appendConditionalJump();
+	appendRevert();
+	*this << afterTag;
+	return *this;
+}
+
 void CompilerContext::resetVisitedNodes(ASTNode const* _node)
 {
 	stack<ASTNode const*> newStack;
-- 
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