aco: make all exec accesses non-temporaries
So that they are not counted into the register demand. Totals from 107336 (77.00% of 139391) affected shaders (Navi10): VGPRs: 4023452 -> 4023248 (-0.01%); split: -0.01%, +0.01% SpillSGPRs: 14088 -> 12571 (-10.77%); split: -11.03%, +0.26% CodeSize: 266816164 -> 266765528 (-0.02%); split: -0.04%, +0.02% MaxWaves: 1553339 -> 1553374 (+0.00%); split: +0.00%, -0.00% Instrs: 50977701 -> 50973093 (-0.01%); split: -0.02%, +0.01% Cycles: 1733911128 -> 1733605320 (-0.02%); split: -0.05%, +0.03% VMEM: 40867650 -> 40900204 (+0.08%); split: +0.13%, -0.05% SMEM: 6835980 -> 6829073 (-0.10%); split: +0.10%, -0.20% VClause: 1032783 -> 1032788 (+0.00%); split: -0.01%, +0.01% SClause: 2103705 -> 2104115 (+0.02%); split: -0.09%, +0.11% Copies: 3195658 -> 3193656 (-0.06%); split: -0.30%, +0.24% Branches: 1140213 -> 1140120 (-0.01%); split: -0.05%, +0.04% PreSGPRs: 3603785 -> 3437064 (-4.63%); split: -5.13%, +0.50% PreVGPRs: 3321996 -> 3321850 (-0.00%) Reviewed-by:Rhys Perry <pendingchaos02@gmail.com> Part-of: <mesa/mesa!8870>