938a419182
When we use get_ref_base_and_extent during VN and that ends up using global ranges to restrict the range of a ref we have to take care of not using the same expression in the hashtable as for a ref that could not use that global range. The following attempts to ensure this by applying similar logic as get_ref_base_and_extent to copy_reference_ops_from_ref so they behave consistent. PR tree-optimization/113831 PR tree-optimization/108355 * tree-ssa-sccvn.cc (copy_reference_ops_from_ref): When we see variable array indices and get_ref_base_and_extent can resolve those to constants fix up the ops to constants as well. (ao_ref_init_from_vn_reference): Use 'off' member for ARRAY_REF and ARRAY_RANGE_REF instead of recomputing it. (valueize_refs_1): Also fixup 'off' of ARRAY_RANGE_REF. * gcc.dg/torture/pr113831.c: New testcase. * gcc.dg/tree-ssa/ssa-fre-104.c: Likewise. |
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| .github | ||
| c++tools | ||
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