Directly assign initializers to variables in variable declarations

.. instead of first assigning to a temporary and then assigning the
temporary to the argument/local.

Change-Id: I15a6c2073b78c5cfc829c7edef07c6bf48be7886
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 10 insertions, 3 deletions

diff --git a/src/qml/compiler/qv4codegen.cpp b/src/qml/compiler/qv4codegen.cpp
index d9c1e90125..7d3ad38f97 100644
--- a/src/qml/compiler/qv4codegen.cpp
+++ b/src/qml/compiler/qv4codegen.cpp
@@ -842,9 +842,16 @@ void Codegen::variableDeclaration(VariableDeclaration *ast)
     Q_ASSERT(expr.code);
     initializer = *expr;
 
-    int initialized = _block->newTemp();
-    move(_block->TEMP(initialized), initializer);
-    move(identifier(ast->name.toString(), ast->identifierToken.startLine, ast->identifierToken.startColumn), _block->TEMP(initialized));
+    IR::Expr *lhs = identifier(ast->name.toString(), ast->identifierToken.startLine,
+                               ast->identifierToken.startColumn);
+
+    if (lhs->asArgLocal()) {
+        move(lhs, initializer);
+    } else {
+        int initialized = _block->newTemp();
+        move(_block->TEMP(initialized), initializer);
+        move(lhs, _block->TEMP(initialized));
+    }
 }
 
 void Codegen::variableDeclarationList(VariableDeclarationList *ast)