Use ArgVar for what essentially is an arg var.

Albeit manually initialized.

lang/src/Compiler-Inlining.js

@@ -1347,8 +1347,8 @@ selector: "inlineClosure:",
 protocol: "inlining",
 //>>excludeStart("ide", pragmas.excludeIdeData);
 args: ["anIRClosure"],
-source: "inlineClosure: anIRClosure\x0a\x09| inlinedClosure sequence statements |\x0a\x0a\x09inlinedClosure := self inlinedClosure.\x0a\x09inlinedClosure \x0a\x09\x09scope: anIRClosure scope;\x0a\x09\x09parent: anIRClosure parent.\x0a\x0a\x09\x22Add the possible temp declarations\x22\x0a\x09anIRClosure tempDeclarations do: [ :each |\x0a\x09\x09\x09inlinedClosure add: each ].\x0a\x0a\x09\x22Add a block sequence\x22\x0a\x09sequence := self inlinedSequence.\x0a\x0a\x09\x22Map the closure arguments to the receiver of the message send\x22\x0a\x09anIRClosure arguments do: [ :each |\x0a\x09\x09inlinedClosure add: (IRTempDeclaration new name: each; yourself).\x0a\x09\x09sequence add: (IRAssignment new\x0a\x09\x09\x09add: (IRVariable new variable: (AliasVar new scope: inlinedClosure scope; name: each; yourself));\x0a\x09\x09\x09add: self send receiver;\x0a\x09\x09\x09yourself) ].\x0a\x09\x09\x09\x0a\x09\x22To ensure the correct order of the closure instructions: first the temps then the sequence\x22\x0a\x09inlinedClosure add: sequence.\x0a\x0a\x09\x22Get all the statements\x22\x0a\x09statements := anIRClosure sequence dagChildren.\x0a\x09\x0a\x09statements ifNotEmpty: [\x0a\x09\x09statements allButLast do: [ :each | sequence add: each ].\x0a\x0a\x09\x09\x22Inlined closures change local returns into result value itself\x22\x0a\x09\x09sequence add: statements last asInlinedBlockResult ].\x0a\x0a\x09^ inlinedClosure",
-referencedClasses: ["IRTempDeclaration", "IRAssignment", "IRVariable", "AliasVar"],
+source: "inlineClosure: anIRClosure\x0a\x09| inlinedClosure sequence statements |\x0a\x0a\x09inlinedClosure := self inlinedClosure.\x0a\x09inlinedClosure \x0a\x09\x09scope: anIRClosure scope;\x0a\x09\x09parent: anIRClosure parent.\x0a\x0a\x09\x22Add the possible temp declarations\x22\x0a\x09anIRClosure tempDeclarations do: [ :each |\x0a\x09\x09\x09inlinedClosure add: each ].\x0a\x0a\x09\x22Add a block sequence\x22\x0a\x09sequence := self inlinedSequence.\x0a\x0a\x09\x22Map the closure arguments to the receiver of the message send\x22\x0a\x09anIRClosure arguments do: [ :each |\x0a\x09\x09inlinedClosure add: (IRTempDeclaration new name: each; yourself).\x0a\x09\x09sequence add: (IRAssignment new\x0a\x09\x09\x09add: (IRVariable new variable: (ArgVar new scope: inlinedClosure scope; name: each; yourself));\x0a\x09\x09\x09add: self send receiver;\x0a\x09\x09\x09yourself) ].\x0a\x09\x09\x09\x0a\x09\x22To ensure the correct order of the closure instructions: first the temps then the sequence\x22\x0a\x09inlinedClosure add: sequence.\x0a\x0a\x09\x22Get all the statements\x22\x0a\x09statements := anIRClosure sequence dagChildren.\x0a\x09\x0a\x09statements ifNotEmpty: [\x0a\x09\x09statements allButLast do: [ :each | sequence add: each ].\x0a\x0a\x09\x09\x22Inlined closures change local returns into result value itself\x22\x0a\x09\x09sequence add: statements last asInlinedBlockResult ].\x0a\x0a\x09^ inlinedClosure",
+referencedClasses: ["IRTempDeclaration", "IRAssignment", "IRVariable", "ArgVar"],
 //>>excludeEnd("ide");
 pragmas: [],
 messageSends: ["inlinedClosure", "scope:", "scope", "parent:", "parent", "do:", "tempDeclarations", "add:", "inlinedSequence", "arguments", "name:", "new", "yourself", "variable:", "receiver", "send", "dagChildren", "sequence", "ifNotEmpty:", "allButLast", "asInlinedBlockResult", "last"]
@@ -1425,7 +1425,7 @@ $9=[$recv($globals.IRVariable)._new()
 ,$ctx2.sendIdx["new"]=3
 //>>excludeEnd("ctx");
 ][0];
-$11=$recv($globals.AliasVar)._new();
+$11=$recv($globals.ArgVar)._new();
 $recv($11)._scope_($recv(inlinedClosure)._scope());
 $recv($11)._name_(each);
 $10=[$recv($11)._yourself()

lang/src/Compiler-Inlining.st

@@ -380,7 +380,7 @@ inlineClosure: anIRClosure
 	anIRClosure arguments do: [ :each |
 		inlinedClosure add: (IRTempDeclaration new name: each; yourself).
 		sequence add: (IRAssignment new
-			add: (IRVariable new variable: (AliasVar new scope: inlinedClosure scope; name: each; yourself));
+			add: (IRVariable new variable: (ArgVar new scope: inlinedClosure scope; name: each; yourself));
 			add: self send receiver;
 			yourself) ].