From 23eca813f578463383afd37b76ce49d87f79c811 Mon Sep 17 00:00:00 2001
From: chriseth <c@ethdev.com>
Date: Tue, 24 Jan 2017 12:06:11 +0100
Subject: Change clearStorageLoop to TypePointer.

---
 libsolidity/codegen/ArrayUtils.cpp | 29 ++++++++++++++---------------
 libsolidity/codegen/ArrayUtils.h   |  5 ++++-
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/libsolidity/codegen/ArrayUtils.cpp b/libsolidity/codegen/ArrayUtils.cpp
index 0b09cc1a..4d100d1d 100644
--- a/libsolidity/codegen/ArrayUtils.cpp
+++ b/libsolidity/codegen/ArrayUtils.cpp
@@ -276,7 +276,7 @@ void ArrayUtils::copyArrayToStorage(ArrayType const& _targetType, ArrayType cons
 			// stack: target_ref target_data_end source_data_pos target_data_pos_updated source_data_end
 			_context << Instruction::POP << Instruction::SWAP1 << Instruction::POP;
 			// stack: target_ref target_data_end target_data_pos_updated
-			utils.clearStorageLoop(*targetBaseType);
+			utils.clearStorageLoop(targetBaseType);
 			_context << Instruction::POP;
 		}
 	);
@@ -572,9 +572,9 @@ void ArrayUtils::clearArray(ArrayType const& _typeIn) const
 				ArrayUtils(_context).convertLengthToSize(_type);
 				_context << Instruction::ADD << Instruction::SWAP1;
 				if (_type.baseType()->storageBytes() < 32)
-					ArrayUtils(_context).clearStorageLoop(*make_shared<IntegerType>(256));
+					ArrayUtils(_context).clearStorageLoop(make_shared<IntegerType>(256));
 				else
-					ArrayUtils(_context).clearStorageLoop(*_type.baseType());
+					ArrayUtils(_context).clearStorageLoop(_type.baseType());
 				_context << Instruction::POP;
 			}
 			solAssert(_context.stackHeight() == stackHeightStart - 2, "");
@@ -613,9 +613,9 @@ void ArrayUtils::clearDynamicArray(ArrayType const& _type) const
 		<< Instruction::SWAP1;
 	// stack: data_pos_end data_pos
 	if (_type.isByteArray() || _type.baseType()->storageBytes() < 32)
-		clearStorageLoop(*make_shared<IntegerType>(256));
+		clearStorageLoop(make_shared<IntegerType>(256));
 	else
-		clearStorageLoop(*_type.baseType());
+		clearStorageLoop(_type.baseType());
 	// cleanup
 	m_context << endTag;
 	m_context << Instruction::POP;
@@ -720,7 +720,7 @@ void ArrayUtils::resizeDynamicArray(ArrayType const& _typeIn) const
 				ArrayUtils(_context).convertLengthToSize(_type);
 				_context << Instruction::DUP2 << Instruction::ADD << Instruction::SWAP1;
 				// stack: ref new_length current_length first_word data_location_end data_location
-				ArrayUtils(_context).clearStorageLoop(*make_shared<IntegerType>(256));
+				ArrayUtils(_context).clearStorageLoop(make_shared<IntegerType>(256));
 				_context << Instruction::POP;
 				// stack: ref new_length current_length first_word
 				solAssert(_context.stackHeight() - stackHeightStart == 4 - 2, "3");
@@ -759,9 +759,9 @@ void ArrayUtils::resizeDynamicArray(ArrayType const& _typeIn) const
 			_context << Instruction::SWAP2 << Instruction::ADD;
 			// stack: ref new_length delete_end delete_start
 			if (_type.isByteArray() || _type.baseType()->storageBytes() < 32)
-				ArrayUtils(_context).clearStorageLoop(*make_shared<IntegerType>(256));
+				ArrayUtils(_context).clearStorageLoop(make_shared<IntegerType>(256));
 			else
-				ArrayUtils(_context).clearStorageLoop(*_type.baseType());
+				ArrayUtils(_context).clearStorageLoop(_type.baseType());
 
 			_context << resizeEnd;
 			// cleanup
@@ -771,17 +771,16 @@ void ArrayUtils::resizeDynamicArray(ArrayType const& _typeIn) const
 	);
 }
 
-void ArrayUtils::clearStorageLoop(Type const& _type) const
+void ArrayUtils::clearStorageLoop(TypePointer const& _type) const
 {
-	TypePointer type = _type.shared_from_this();
 	m_context.callLowLevelFunction(
-		"$clearStorageLoop_" + _type.identifier(),
+		"$clearStorageLoop_" + _type->identifier(),
 		2,
 		1,
-		[type](CompilerContext& _context)
+		[_type](CompilerContext& _context)
 		{
 			unsigned stackHeightStart = _context.stackHeight();
-			if (type->category() == Type::Category::Mapping)
+			if (_type->category() == Type::Category::Mapping)
 			{
 				_context << Instruction::POP;
 				return;
@@ -802,10 +801,10 @@ void ArrayUtils::clearStorageLoop(Type const& _type) const
 			_context.appendConditionalJumpTo(zeroLoopEnd);
 			// delete
 			_context << u256(0);
-			StorageItem(_context, *type).setToZero(SourceLocation(), false);
+			StorageItem(_context, *_type).setToZero(SourceLocation(), false);
 			_context << Instruction::POP;
 			// increment
-			_context << type->storageSize() << Instruction::ADD;
+			_context << _type->storageSize() << Instruction::ADD;
 			_context.appendJumpTo(loopStart);
 			// cleanup
 			_context << zeroLoopEnd;
diff --git a/libsolidity/codegen/ArrayUtils.h b/libsolidity/codegen/ArrayUtils.h
index d0ba2892..806fbea7 100644
--- a/libsolidity/codegen/ArrayUtils.h
+++ b/libsolidity/codegen/ArrayUtils.h
@@ -22,6 +22,8 @@
 
 #pragma once
 
+#include <memory>
+
 namespace dev
 {
 namespace solidity
@@ -30,6 +32,7 @@ namespace solidity
 class CompilerContext;
 class Type;
 class ArrayType;
+using TypePointer = std::shared_ptr<Type const>;
 
 /**
  * Class that provides code generation for handling arrays.
@@ -67,7 +70,7 @@ public:
 	/// Appends a loop that clears a sequence of storage slots of the given type (excluding end).
 	/// Stack pre: end_ref start_ref
 	/// Stack post: end_ref
-	void clearStorageLoop(Type const& _type) const;
+	void clearStorageLoop(TypePointer const& _type) const;
 	/// Converts length to size (number of storage slots or calldata/memory bytes).
 	/// if @a _pad then add padding to multiples of 32 bytes for calldata/memory.
 	/// Stack pre: length
-- 
cgit