nir/algebraic: allow non-const for iand(iadd()) -> iadd(iand())

fossil-db (gfx1201):
Totals from 596 (0.75% of 79839) affected shaders:
Instrs: 691926 -> 691819 (-0.02%); split: -0.11%, +0.09%
CodeSize: 3675216 -> 3675180 (-0.00%); split: -0.08%, +0.08%
VGPRs: 37464 -> 37452 (-0.03%)
Latency: 8566849 -> 8563162 (-0.04%); split: -0.09%, +0.05%
InvThroughput: 1068038 -> 1063279 (-0.45%); split: -0.46%, +0.01%
VClause: 17859 -> 17897 (+0.21%); split: -0.01%, +0.22%
SClause: 16704 -> 16735 (+0.19%); split: -0.07%, +0.26%
Copies: 45422 -> 45395 (-0.06%); split: -0.15%, +0.09%
PreSGPRs: 24345 -> 24351 (+0.02%)
PreVGPRs: 29121 -> 29128 (+0.02%)
VALU: 349959 -> 348117 (-0.53%); split: -0.54%, +0.01%
SALU: 105926 -> 107576 (+1.56%); split: -0.02%, +1.58%
VOPD: 252 -> 234 (-7.14%)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36760>

src/compiler/nir/nir_opt_algebraic.py

@@ -612,7 +612,7 @@ optimizations.extend([
 for log2 in range(1, 7): # powers of two from 2 to 64
    v = 1 << log2
    mask = 0xffffffff & ~(v - 1)
-   b_is_multiple = '#b(is_unsigned_multiple_of_{})'.format(v)
+   b_is_multiple = 'b(is_unsigned_multiple_of_{})'.format(v)
 
    optimizations.extend([
        # Reassociate for improved CSE