Gabor Loki wrote: > I have noticed some strange loads in the bytecode (rev34071). > They look like unnecessary. > > Here it is a simple js: > > var a, b; > a = 5; > b = a * a + a; > > And the bytecode output was with 'testkjs -d -f 1.js': > > 9 instructions; 224 bytes at 0x69ca30; 2 locals (0 parameters); 2 temporaries > > [ 0] load lr6, undefined(@k0) > [ 3] load lr7, undefined(@k0) > [ 6] load tr0, undefined(@k0) > [ 9] load lr6, 5(@k1) > [ 12] mov tr0, lr6 > [ 15] mul tr1, lr6, lr6 > [ 19] add lr7, tr1, lr6 > [ 23] mov tr0, lr7 > [ 26] end tr0 > > Constants: > k0 = undefined > k1 = 5 > > End: 30 > > > These instructions are unnecessary, aren't they? > Or is there a technical explanation of them?
Opps, I forgot to point on the instructions. I think that the first three loads are unnecessary. [ 0] load lr6, undefined(@k0) [ 3] load lr7, undefined(@k0) [ 6] load tr0, undefined(@k0) --Gabor _______________________________________________ webkit-dev mailing list [email protected] http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
