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Cherry-pick patch from V8 upstream that fixes instanceof problem #7638

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fhinkel wants to merge 5 commits into from
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Cherry-pick patch from V8 upstream that fixes instanceof problem #7638

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ca51390
deps: cherry-pick 2aa070be from V8 upstream
fhinkel Jul 8, 2016
e06e255
deps: cherry-pick 3a903c4 for PPC from V8 upstream
fhinkel Jul 11, 2016
f007c0a
deps: cherry-pick 5b5d24b for X87 from V8 upstream
fhinkel Jul 11, 2016
ef9092b
test: add regression test for instanceof
fhinkel Jul 8, 2016
8261c9f
deps: bump V8 patchlevel for instanceof cherry-picks
fhinkel Jul 11, 2016
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deps: cherry-pick 3a903c4 for PPC from V8 upstream 
Original commit message:

    PPC: InstanceOfStub incorrectly interprets the hole as a prototype.
    Port 2aa070b

    Original commit message:
        Repair this to match what the runtime correctly does,
        by first checking if the function is a constructor
        before we access the prototype.

    [email protected], [email protected], [email protected],
    [email protected]

    BUG=

    Review URL: https://codereview.chromium.org/1811013002

    Cr-Commit-Position: refs/heads/master@{#34869}

Fixes: #7592 for PPC
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@fhinkel
fhinkel committed Jul 21, 2016
commit e06e255c2ce66746ad4d4dbfb4cd358298cc94a8
6 changes: 5 additions & 1 deletion deps/v8/src/ppc/code-stubs-ppc.cc
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Expand Up @@ -1409,8 +1409,12 @@ void InstanceOfStub::Generate(MacroAssembler* masm) {
__ CompareObjectType(function, function_map, scratch, JS_FUNCTION_TYPE);
__ bne(&slow_case);

// Ensure that {function} has an instance prototype.
// Go to the runtime if the function is not a constructor.
__ lbz(scratch, FieldMemOperand(function_map, Map::kBitFieldOffset));
__ TestBit(scratch, Map::kIsConstructor, r0);
__ beq(&slow_case, cr0);

// Ensure that {function} has an instance prototype.
__ TestBit(scratch, Map::kHasNonInstancePrototype, r0);
__ bne(&slow_case, cr0);

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