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Bug 451785 - Trace == and != involving booleans. r=gal

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This commit is contained in:
Blake Kaplan 2008-08-25 16:58:18 -07:00
parent 298caaa80f
commit 48d275806e
1 changed files with 26 additions and 0 deletions
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26
js/src/jstracer.cpp
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@ -2646,6 +2646,32 @@ TraceRecorder::cmp(LOpcode op, bool negate)
cond = (lnum == rnum) ^ negate;
break;
}
} else if (JSVAL_IS_BOOLEAN(l) && JSVAL_IS_BOOLEAN(r)) {
x = lir->ins2(op, lir->ins1(LIR_i2f, get(&l)), lir->ins1(LIR_i2f, get(&r)));
if (negate)
x = lir->ins_eq0(x);
// The well-known values of JSVAL_TRUE and JSVAL_FALSE make this very easy.
// In particular: JSVAL_TO_BOOLEAN(0) < JSVAL_TO_BOOLEAN(1) so all of these comparisons do
// the right thing.
switch (op) {
case LIR_flt:
cond = l < r;
break;
case LIR_fgt:
cond = l > r;
break;
case LIR_fle:
cond = l <= r;
break;
case LIR_fge:
cond = l >= r;
break;
default:
JS_ASSERT(op == LIR_feq);
cond = (l == r) ^ negate;
break;
}
} else {
ABORT_TRACE("unsupported operand types for cmp");
}