From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 25 May 2019 21:53:05 +0000 (+0300)
Subject: Allow removing the initialization statement of a for loop
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=670cd5e97ba225b5eb43fdda4ad53bf2731a35fa

Allow removing the initialization statement of a for loop

Previously the compiler would recognize it as unused but couldn't remove
it, leading it to repeat the optimizer endlessly.
---

diff --git a/source/programcompiler.cpp b/source/programcompiler.cpp
index 88ec6e59..2bf57c6a 100644
--- a/source/programcompiler.cpp
+++ b/source/programcompiler.cpp
@@ -1658,6 +1658,12 @@ void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
 		var.init_expression = 0;
 }
 
+void ProgramCompiler::NodeRemover::visit(Iteration &iter)
+{
+	if(to_remove.count(iter.init_statement.get()))
+		iter.init_statement = 0;
+}
+
 
 void ProgramCompiler::PrecisionRemover::visit(Precision &)
 {
diff --git a/source/programcompiler.h b/source/programcompiler.h
index 461fac9a..1258bde0 100644
--- a/source/programcompiler.h
+++ b/source/programcompiler.h
@@ -324,6 +324,7 @@ private:
 		using Visitor::visit;
 		virtual void visit(ProgramSyntax::Block &);
 		virtual void visit(ProgramSyntax::VariableDeclaration &);
+		virtual void visit(ProgramSyntax::Iteration &);
 	};
 
 	struct PrecisionRemover: BlockModifier