When we have a conditional like 'if (a && b)' we try to fold the branching together, per bug 1028580. The pattern matching we use for this breaks when the test is something like 'if (foo())' and there is a 'function foo(a, b) { return a && b; }' which was inlined. It would be better if we were more robust on this. This affects the main loop in octane-richards, which has a 'if (this.currentTcb.isHeldOrSuspended())' test that breaks down to a conditional. Fixing this, as this patch does, gives me 1k-2k points on richards (x86 10.9).