ekpyron

Optimized IR:
/*=====================================================*
 *                       WARNING                       *
 *  Solidity to Yul compilation is still EXPERIMENTAL  *
 *       It can result in LOSS OF FUNDS or worse       *
 *                !USE AT YOUR OWN RISK!               *
 *=====================================================*/

/// @use-src 0:"test/libsolidity/semanticTests/userDefinedValueType/calldata.sol"
object "C_294" {

ekpyron

diff --git a/libyul/backends/evm/OptimizedEVMCodeTransform.cpp b/libyul/backends/evm/OptimizedEVMCodeTransform.cpp
index 6cd9b45cd..db0dd3007 100644
--- a/libyul/backends/evm/OptimizedEVMCodeTransform.cpp
+++ b/libyul/backends/evm/OptimizedEVMCodeTransform.cpp
@@ -342,7 +342,10 @@ void OptimizedEVMCodeTransform::createStackLayout(Stack _targetStack)
 					// - the constant 0
 					// Note: it might even make sense to introduce a specific assembly item for this, s.t.
 					//       the peephole optimizer can deal with this (e.g. POP PUSHJUNK can be removed).
-					m_assembly.appendInstruction(evmasm::Instruction::PC);
+					if (m_assembly.stackHeight() == 0)

ekpyron

object "C_46" {
    code {
        {
            /// @src 0:0:160
            let _1 := memoryguard(0x80)
            mstore(64, _1)
            if callvalue() { revert(0, 0) }
            let _2 := datasize("C_46_deployed")
            codecopy(_1, dataoffset("C_46_deployed"), _2)
            return(_1, _2)

ekpyron

object "object" {
    code {
        {
            let _1 := mload(sub(shl(137, 1), 1))
            let _2 := foo_s_107_268_512_924_1670(sub(shl(125, 1), 1), sub(shl(129, 1), 1), sub(shl(133, 1), 1), _1)
            let _3 := mload(sub(shl(105, 1), 1))
            let _4 := foo_s_107_268_512_924_1670(sub(shl(101, 1), 1), _3, sub(shl(109, 1), 1), sub(shl(113, 1), 1))
            pop(foo_s_107_268_512_924_1670(sub(shl(97, 1), 1), not(foo_s_107_268_512_924_1670(sub(shl(97, 1), 1), not(foo_s_107_268_512_924_1670(sub(shl(97, 1), 1), not(foo_s_107_268_512_924_1670(sub(shl(97, 1), 1), not(foo_s_107_268_512_924_1670(sub(shl(97, 1), 1), not(foo_s_107_268_512_924_1670(sub(shl(97, 1), 1), foo_s_107_268_512_924_1670(sub(shl(101, 1), 1), _3, sub(shl(109, 1), 1), sub(shl(113, 1), 1)), sub(shl(117, 1), 1), addmod(sub(shl(121, 1), 1), foo_s_107_268_512_924_1670(sub(shl(125, 1), 1), sub(shl(129, 1), 1), sub(shl(133, 1), 1), _1), sub(shl(141, 1), 1)))), sub(shl(117, 1), 1), addmod(sub(shl(121, 1), 1), not(foo_s_107_268_512_924

ekpyron

#!/bin/bash
echo '{"contracts": {"test.sol:C": {"asm": {".code": [],".data": {"0": 
{".auxdata":"a26469706673582212205fe09eead890659ccd3f8dfd5c787234e5830f5efe2e01ab570bd5d3eb7ce18364736f6c6378263
02e382e372d646576656c6f702e323032312e372e382b636f6d6d69742e30306330666361660057",
".code": [' > /tmp/test.asm

cat $1 | while read OP; do
        if [[ $OP == PUSH* ]]; then
                VALUE=$(echo $OP | cut -f 2 -d ' ')
                echo "{\"begin\": 0,\"end\": 0,\"name\": \"PUSH\",\"source\": 0,\"value\": \"${VALUE}\"}," >>

ekpyron

// test/libsolidity/semanticTests/calldata/calldata_internal_function_pointer.sol --evm-version homestead --optimize
// function call to g() reverts, even though it should not
object "C_71" {
    code {
        {
            mstore(64, 128)
            if callvalue() { revert(0, 0) }
            sstore(0x00, or(and(sload(0x00), not(sub(exp(2, 64), 1))), 28))
            let _1 := datasize("C_71_deployed")
            codecopy(128, dataoffset("C_71_deployed"), _1)

ekpyron

template<typename GetTargetPosition, typename Swap, typename Pop>
void permute(unsigned _n, GetTargetPosition _getTargetPosition, Swap _swap, Pop _pop)
{
	static_assert(
		std::is_same_v<std::invoke_result_t<GetTargetPosition, unsigned>, int>,
		"_getTargetPosition needs to have the signature int(unsigned)"
	);
	static_assert(
		std::is_same_v<std::invoke_result_t<Swap, unsigned>, void>,
		"_swap needs to have the signature void(unsigned)"

ekpyron

/// Generic helper functions for handling permutations.
/// @a _n Specifies the size of the permutation.
/// @a _getTargetPosition A function that takes an offset as unsigned integer as argument and returns the desired target position
///                       of the element at that offset as integer or -1, if the element is to be discarded.
/// @a _swap Takes a (zero-based) depth as unsigned integer as argument and swaps the currently last element with the
///          element at the given depth.
/// @a _pop Pops the last element.
template<typename GetTargetPosition, typename Swap, typename Pop>
void permute(unsigned _n, GetTargetPosition _getTargetPosition, Swap _swap, Pop _pop)
{

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{
     mstore(0x40, memoryguard(0x0580))
     {
         function fo_0() -> x_4, _
         { x_4 := mod(0x800, 0) }
         let x_5117
         function foo_m_3(x_27, _288, x_9, x_290, x_291, x_292, x_23, x_294, x_295, x6, _297, x_298, x_299, _300, x_301, x_302, x_303, _304, x30, x_306, x_307, x_30, x_309, x_310, x_311, x_312) -> x_327, x_28, x_29, x_330, __1, x_332, x_, x_334, x_3, _36, x_337, x_38, x39, x0, x_31, x_342
         {
             mstore(0x0560, x_27)
             mstore(0x0540, _288)

ekpyron

Optimized IR:
/*******************************************************
 *                       WARNING                       *
 *  Solidity to Yul compilation is still EXPERIMENTAL  *
 *       It can result in LOSS OF FUNDS or worse       *
 *                !USE AT YOUR OWN RISK!               *
 *******************************************************/

object "c_145" {
    code {