1 files changed, 103 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/parser/bytecode-sharing.js b/js/src/jit-test/tests/parser/bytecode-sharing.js
new file mode 100644
index 0000000000..26f0ac429c
--- /dev/null
+++ b/js/src/jit-test/tests/parser/bytecode-sharing.js
@@ -0,0 +1,103 @@
+// Test that bytecode is still shared when expected. The expectations can be
+// updated if necessary.
+
+
+// Check the testing function.
+evaluate(`function a01(){ return a + b; }`)
+evaluate(`function a02(){ return a + b; }`)
+evaluate(`function a03(){ return a + b + c; }`)
+assertEq(hasSameBytecodeData(a01, a02), true)
+assertEq(hasSameBytecodeData(a01, a03), false)
+
+
+// Check effect of whitespace.
+evaluate(`function   b(){}`)
+evaluate(`function b01(){}`)
+evaluate(`function b02 (){}`)
+evaluate(`function b03( ){}`)
+evaluate(`function b04() {}`)
+evaluate(`function b05(){ }`)
+assertEq(hasSameBytecodeData(b, b01), true)
+assertEq(hasSameBytecodeData(b, b02), true)
+assertEq(hasSameBytecodeData(b, b03), false)
+assertEq(hasSameBytecodeData(b, b04), false)
+assertEq(hasSameBytecodeData(b, b05), false)
+
+
+// Check effect of binding names.
+evaluate(`function c01(){ return a; }`)
+evaluate(`function c02(){ return b; }`)
+evaluate(`function c03(){ return cc; }`)
+assertEq(hasSameBytecodeData(c01, c02), true)
+assertEq(hasSameBytecodeData(c01, c03), false)
+
+
+// Check effect of string literals.
+evaluate(`function d01(){ return "AA"; }`)
+evaluate(`function d02(){ return "BB"; }`)
+assertEq(hasSameBytecodeData(d01, d02), true)
+
+
+// Check effect of string template literals.
+evaluate("function e01(){ return a`AA`; }")
+evaluate("function e02(){ return b`BB`; }")
+assertEq(hasSameBytecodeData(e01, e02), true)
+
+
+// Check effect of object literals.
+evaluate(`function f01(){ return { a: 1 }; }`)
+evaluate(`function f02(){ return { b: 1 }; }`)
+evaluate(`function f03(){ return { b: 2 }; }`)
+assertEq(hasSameBytecodeData(f01, f02), true)
+assertEq(hasSameBytecodeData(f01, f03), false)
+
+
+// Check effect of inner functions.
+evaluate(`function g01(){ return () => 0; }`)
+evaluate(`function g02(){ return () => 0; }`)
+evaluate(`function g03(){ return () => a; }`)
+assertEq(hasSameBytecodeData(g01, g02), true)
+assertEq(hasSameBytecodeData(g01, g03), true)
+
+
+// Check effect of line number.
+evaluate(`function h01(){ return 0; }`)
+evaluate(`\nfunction h02(){ return 0; }`)
+evaluate(`\n\n\n\n\n\n\nfunction h03(){ return 0; }`)
+assertEq(hasSameBytecodeData(h01, h02), true)
+assertEq(hasSameBytecodeData(h01, h03), true)
+
+
+// Check effect of line number when function has large gaps in it. This
+// corresponds to SetLine source-notes.
+evaluate(`function i01(){ return\n\n\n\n\n\n\n\n0; }`)
+evaluate(`\nfunction i02(){ return\n\n\n\n\n\n\n\n0; }`)
+evaluate(`\n\n\n\n\n\n\nfunction i03(){ return\n\n\n\n\n\n\n\n0; }`)
+assertEq(hasSameBytecodeData(i01, i02), true)
+assertEq(hasSameBytecodeData(i01, i03), true)
+
+
+// Check effect of column number.
+evaluate(`function j01(){ return 0; }`)
+evaluate(` function j02(){ return 0; }`)
+evaluate(` \tfunction j03(){ return 0; }`)
+assertEq(hasSameBytecodeData(j01, j02), true)
+assertEq(hasSameBytecodeData(j01, j03), true)
+
+
+// Check different forms of functions.
+evaluate(`function k01      ()    { return 0; }`)
+evaluate(`var k02 = function()    { return 0; }`)
+evaluate(`var k03 =         () => { return 0; }`)
+assertEq(hasSameBytecodeData(k01, k02), true)
+assertEq(hasSameBytecodeData(k01, k03), true)
+
+
+// Check sharing across globals / compartments.
+let l02_global = newGlobal({newCompartment: false});
+let l03_global = newGlobal({newCompartment: true});
+evaluate(`function l01() { return 0; }`)
+l02_global.evaluate(`function l02() { return 0; }`)
+l03_global.evaluate(`function l03() { return 0; }`)
+assertEq(hasSameBytecodeData(l01, l02_global.l02), true)
+assertEq(hasSameBytecodeData(l01, l03_global.l03), true)