// |jit-test| --no-ion; --ion-pgo=on // Warp lacks Scalar Replacement support (bug 1650233). Re-evaluate after that // bug has been fixed. var max = 200; // Ion eager fails the test below because we have not yet created any // template object in baseline before running the content of the top-level // function. if (getJitCompilerOptions()["ion.warmup.trigger"] <= max - 10) setJitCompilerOption("ion.warmup.trigger", max - 10); // Force Inlining heuristics to always inline the functions which have the same // number of use count. setJitCompilerOption("ion.warmup.trigger", getJitCompilerOptions()["ion.warmup.trigger"]); // This test checks that we are able to remove the getprop & setprop with scalar // replacement, so we should not force inline caches, as this would skip the // generation of getprop & setprop instructions. if (getJitCompilerOptions()["ion.forceinlineCaches"]) setJitCompilerOption("ion.forceinlineCaches", 0); // Prevent the GC from cancelling Ion compilations, when we expect them to succeed gczeal(0); function resumeHere() {} var uceFault = function (i) { if (i > max - 2) uceFault = function (i) { return true; }; return false; }; // Without "use script" in the inner function, the arguments might be // observable. function inline_notSoEmpty1(a, b, c, d) { // This function is not strict, so we might be able to observe its // arguments, if somebody ever called fun.arguments inside it. return { v: (a.v + b.v + c.v + d.v - 10) / 4 }; } var uceFault_notSoEmpty1 = eval(`(${uceFault})`.replace('uceFault', 'uceFault_notSoEmpty1')); function notSoEmpty1() { var a = { v: i }; var b = { v: 1 + a.v }; var c = { v: 2 + b.v }; var d = { v: 3 + c.v }; var unused = { v: 4 + d.v }; var res = inline_notSoEmpty1(a, b, c, d); if (uceFault_notSoEmpty1(i) || uceFault_notSoEmpty1(i)) assertEq(i, res.v); // Note, that even if the arguments are observable, we are capable of // optimizing these cases by executing recover instruction before the // execution of the bailout. This ensures that the observed objects are // allocated once and used by the unexpected observation and the bailout. assertRecoveredOnBailout(a, true); assertRecoveredOnBailout(b, true); assertRecoveredOnBailout(c, true); assertRecoveredOnBailout(d, true); assertRecoveredOnBailout(unused, true); // This can only be recovered on bailout iff either we have type // information for the property access in the branch, or the branch is // removed before scalar replacement. assertRecoveredOnBailout(res, true); } // Check that we can recover objects with their content. function inline_notSoEmpty2(a, b, c, d) { "use strict"; return { v: (a.v + b.v + c.v + d.v - 10) / 4 }; } var uceFault_notSoEmpty2 = eval(`(${uceFault})`.replace('uceFault', 'uceFault_notSoEmpty2')); function notSoEmpty2(i) { var a = { v: i }; var b = { v: 1 + a.v }; var c = { v: 2 + b.v }; var d = { v: 3 + c.v }; var unused = { v: 4 + d.v }; var res = inline_notSoEmpty2(a, b, c, d); if (uceFault_notSoEmpty2(i) || uceFault_notSoEmpty2(i)) assertEq(i, res.v); assertRecoveredOnBailout(a, true); assertRecoveredOnBailout(b, true); assertRecoveredOnBailout(c, true); assertRecoveredOnBailout(d, true); assertRecoveredOnBailout(unused, true); // This can only be recovered on bailout iff either we have type // information for the property access in the branch, or the branch is // removed before scalar replacement. assertRecoveredOnBailout(res, true); } // Check that we can recover objects with their content. var argFault_observeArg = function (i) { if (i > max - 2) return inline_observeArg.arguments[0]; return { test : i }; }; function inline_observeArg(obj, i) { return argFault_observeArg(i); } function observeArg(i) { var obj = { test: i }; var res = inline_observeArg(obj, i); assertEq(res.test, i); assertRecoveredOnBailout(obj, true); } // Check case where one successor can have multiple times the same predecessor. function complexPhi(i) { var obj = { test: i }; switch (i) { // TableSwitch case 0: obj.test = 0; break; case 1: obj.test = 1; break; case 2: obj.test = 2; break; case 3: case 4: case 5: case 6: default: obj.test = i; break; case 7: obj.test = 7; break; case 8: obj.test = 8; break; case 9: obj.test = 9; break; } assertEq(obj.test, i); assertRecoveredOnBailout(obj, true); } // Check case where one successor can have multiple times the same predecessor. function withinIf(i) { var x = undefined; if (i % 2 == 0) { let obj = { foo: i }; x = obj.foo; assertRecoveredOnBailout(obj, true); obj = undefined; } else { let obj = { bar: i }; x = obj.bar; assertRecoveredOnBailout(obj, true); obj = undefined; } assertEq(x, i); } // Check case where one successor can have multiple times the same predecessor. function unknownLoad(i) { var obj = { foo: i }; // Unknown properties are inlined as undefined. assertEq(obj.bar, undefined); assertRecoveredOnBailout(obj, true); } // Check with dynamic slots. function dynamicSlots(i) { var obj = { p0: i + 0, p1: i + 1, p2: i + 2, p3: i + 3, p4: i + 4, p5: i + 5, p6: i + 6, p7: i + 7, p8: i + 8, p9: i + 9, p10: i + 10, p11: i + 11, p12: i + 12, p13: i + 13, p14: i + 14, p15: i + 15, p16: i + 16, p17: i + 17, p18: i + 18, p19: i + 19, p20: i + 20, p21: i + 21, p22: i + 22, p23: i + 23, p24: i + 24, p25: i + 25, p26: i + 26, p27: i + 27, p28: i + 28, p29: i + 29, p30: i + 30, p31: i + 31, p32: i + 32, p33: i + 33, p34: i + 34, p35: i + 35, p36: i + 36, p37: i + 37, p38: i + 38, p39: i + 39, p40: i + 40, p41: i + 41, p42: i + 42, p43: i + 43, p44: i + 44, p45: i + 45, p46: i + 46, p47: i + 47, p48: i + 48, p49: i + 49, p50: i + 50 }; // Add a function call to capture a resumepoint at the end of the call or // inside the inlined block, such as the bailout does not rewind to the // beginning of the function. resumeHere(); bailout(); assertEq(obj.p0 + obj.p10 + obj.p20 + obj.p30 + obj.p40, 5 * i + 100); assertRecoveredOnBailout(obj, true); } // Check that we can correctly recover allocations of new objects. function Point(x, y) { this.x = x; this.y = y; } function createThisWithTemplate(i) { var p = new Point(i - 1, i + 1); bailout(); assertEq(p.y - p.x, 2); assertRecoveredOnBailout(p, true); } for (var i = 0; i < max; i++) { notSoEmpty1(i); notSoEmpty2(i); observeArg(i); complexPhi(i); withinIf(i); unknownLoad(i); dynamicSlots(i); createThisWithTemplate(i); }