Reland "[compiler] Fix a few test flakes and reenable the tests"

This is a reland of 5dde281c,
after also fixing the ic-migrated-... test, in which an object died
too early.

Original change's description:
> [compiler] Fix a few test flakes and reenable the tests
>
> Bug: v8:12173
> Change-Id: I2983be9133f8ff4d1740e8eba05a3c29d603dfc3
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3168270
> Auto-Submit: Georg Neis <neis@chromium.org>
> Reviewed-by: Maya Lekova <mslekova@chromium.org>
> Commit-Queue: Maya Lekova <mslekova@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76939}

Bug: v8:12173
Change-Id: If385e5c826b8470ef67f12705c5171f330f6cd57
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3171353
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76946}

test/mjsunit/compiler/call-with-arraylike-or-spread-7.js

@@ -43,6 +43,7 @@
   // The call with spread should have been inlined.
   assertFalse(log_got_interpreted);
   assertOptimized(foo);
+  %PrepareFunctionForOptimization(foo);
 
   // This invalidates the DependOnArrayIteratorProtector and causes deopt.
   Object.defineProperty(Array.prototype, Symbol.iterator, {

test/mjsunit/es6/map-constructor-entry-side-effect2.js

@@ -38,6 +38,11 @@ function TestMapConstructorEntrySideEffect(ctor) {
   ctor.prototype.set = originalPrototypeSet;
 }
 
+// Forbid inlining these helper functions to avoid deopt surprises.
+%NeverOptimizeFunction(assertEquals);
+%NeverOptimizeFunction(assertFalse);
+%NeverOptimizeFunction(assertTrue);
+
 %PrepareFunctionForOptimization(TestMapConstructorEntrySideEffect);
 TestMapConstructorEntrySideEffect(Map);
 TestMapConstructorEntrySideEffect(Map);
@@ -48,6 +53,7 @@ assertOptimized(TestMapConstructorEntrySideEffect);
 
 // This call would deopt
 TestMapConstructorEntrySideEffect(WeakMap);
+
 %PrepareFunctionForOptimization(TestMapConstructorEntrySideEffect);
 TestMapConstructorEntrySideEffect(WeakMap);
 TestMapConstructorEntrySideEffect(WeakMap);

test/mjsunit/ic-migrated-map-add-when-monomorphic.js

@@ -13,7 +13,8 @@ function load(o) { return o.x }
 %PrepareFunctionForOptimization(load);
 
 // Initialize the load IC with a map that will not be deprecated.
-load(new A());
+var a = new A();
+load(a);
 
 const oldB = new B();
 (new B()).x = 1.5; // deprecates map

test/mjsunit/mjsunit.status

@@ -211,11 +211,6 @@
   'regress/regress-crbug-941743': [PASS, HEAVY],
   'regress/regress-crbug-1191886': [PASS, HEAVY],
   'wasm/externref-globals': [PASS, HEAVY],
-
-  # BUG(v8:12173).
-  'compiler/call-with-arraylike-or-spread-7': [PASS, FAIL],
-  'ic-migrated-map-add-when-monomorphic': [PASS, FAIL],
-  'es6/map-constructor-entry-side-effect2': [PASS, FAIL]
 }],  # ALWAYS
 
 ##############################################################################