src/v8/test/mjsunit/regress/regress-param-local-type.js

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// Flags: --allow-natives-syntax --opt

// Test that we do not confuse the first local and the first parameter
// when gathering type information.

function f(a) {  // First parameter is tagged.
  var s = '';    // First local has string type.
  var n = 0;
  var i = 1;
  n = i + a;
}

f(1);
f(1);
%OptimizeFunctionOnNextCall(f);
f(1);
assertOptimized(f);


function g() {  // 0th parameter (receiver) is tagged.
  var s = '';   // First local has string type.
  var n = 0;
  var i = 1;
  n = i + this;
}

g.call(1);
g.call(1);
%OptimizeFunctionOnNextCall(g);
g.call(1);
assertOptimized(g);