Optimize via ir hint

.circleci/config.yml

@@ -249,13 +249,6 @@ commands:
   # --------------------------------------------------------------------------
   # Artifact Commands
 
-  remove_signature_from_universal_binary:
-    description: Remove signature from universal binary
-    steps:
-      - run:
-          name: Remove signature from universal binary
-          command: codesign --remove-signature build/solc/solc
-
   store_artifacts_solc:
     description: Store compiled solc executable as artifact
     steps:
@@ -1205,7 +1198,6 @@ jobs:
       - checkout
       - install_dependencies_osx
       - run_build
-      - remove_signature_from_universal_binary
       - store_artifacts_solc
       - store_artifacts_yul_phaser
       - persist_executables_to_workspace_osx

libsolidity/codegen/ExpressionCompiler.cpp

@@ -3256,18 +3256,17 @@ void ExpressionCompiler::appendExternalFunctionCall(
 	    //in this kind of precompiled contracts , return type is dynamicType
 	    if (haveReturndatacopy)
 	    {
-	        m_context << u256(0) << Instruction::RETURNDATASIZE;
+	        m_context << Instruction::RETURNDATASIZE;
 	        m_context.appendInlineAssembly(R"({
-				start := mload(0x40)
-				size := add(returndatasize(), 0x40)
-				mstore(0x40, add(start, size))
-
-				returndatacopy(add(start, 0x40), 0, returndatasize())
-				mstore(start, 0x20)
-				mstore(add(start, 0x20), div(returndatasize(), 0x20))
-	        })", {"start", "size"});
-
-			utils().abiDecode(returnTypes, true);
+				switch v case 0 {
+					v := 0x60
+				} default {
+					v := mload(0x40)
+					mstore(0x40, add(v, and(add(returndatasize(), 0x3f), not(0x1f))))
+					mstore(v, div(returndatasize(), 0x20))
+					returndatacopy(add(v, 0x20), 0, returndatasize())
+				}
+	        })", {"v"});
 	    }
 
 	}

libsolutil/StackTooDeepString.h

@@ -23,6 +23,6 @@ namespace solidity::util
 {
 	static std::string stackTooDeepString =
 		"Stack too deep. "
-		"Try compiling with `--via-ir` (cli) or the equivalent `viaIR: true` (standard JSON) "
+		"Try compiling with `--experimental-via-ir` (cli) or the equivalent `viaIR: true` (standard JSON) "
 		"while enabling the optimizer. Otherwise, try removing local variables.";
 }

solc/CommandLineParser.cpp

@@ -1428,7 +1428,7 @@ void CommandLineParser::processArgs()
 	if (m_args.count(g_strViaIR) > 0) {
 		solThrow(
 			CommandLineValidationError,
-			"Compilation mode via the IR is experimental now. Use --"  + g_strExperimentalViaIR + "."
+			"The --" + g_strViaIR + " is currently experimental for TRON solidity compiler. Use --" + g_strExperimentalViaIR + " instead."
 		);
 	}
 	m_options.output.viaIR = (m_args.count(g_strExperimentalViaIR) > 0 || m_args.count(g_strViaIR) > 0);