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5ab4db5459
The following corrects a mistake with the zero value handling which was broken because the bits bias was applied first which works for the special-case using a bit-and but not when using a conditional move. Apply this after the fact instead where it also more easily folds with an existing bias we compensate. PR tree-optimization/122212 * tree-ssa-forwprop.cc (simplify_count_zeroes): Apply bias for CLZ after dealing with the zero special value. * gcc.dg/torture/pr122212.c: New testcase.
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