d0de3bf917
When PRE discovers a full redundancy during insertion it cannot unite the two value sets. Instead it inserts a copy old-val = new-val where new-val can also be a constant. The following looks through such copies during elimination, providing one extra level of constant and copy propagation. For the PR this helps avoiding a bogus diagnostic that's emitted on unreachable code during loop optimization. PR tree-optimization/110204 * tree-ssa-sccvn.cc (eliminate_dom_walker::eliminate_avail): Look through copies generated by PRE. |
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
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| gotools | ||
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