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Bug 792234 - Remove erroneous folding for MDiv. r=dvander

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This commit is contained in:
Sean Stangl 2012-09-18 15:31:58 -07:00
parent 0ebf25f2e4
commit 8c59e4e259
2 changed files with 7 additions and 5 deletions
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5
js/src/ion/MIR.cpp
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@ -694,11 +694,6 @@ MDiv::foldsTo(bool useValueNumbers)
if (MDefinition *folded = EvaluateConstantOperands(this)) if (MDefinition *folded = EvaluateConstantOperands(this))
return folded; return folded;
// 0 / x -> 0
// x / 1 -> x
if (IsConstant(lhs(), 0) || IsConstant(rhs(), 1))
return lhs();
return this; return this;
} }

7
js/src/jit-test/tests/ion/bug792234.js Normal file
View File

@ -0,0 +1,7 @@
function foo() {
return '' / undefined;
}
foo();
assertEq(foo(), NaN);