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0bdd2261c2
If there is only one argument to a PHI which is defined, an equivalency is created between the def and the argument. It is safe to consider the def equal to the argument, but it is dangerous to assume the argument is also equivalent to the def as there may be branches which change the range on the path to the PHI on that argument This patch avoid using that relation in range-on-entry calculations. PR tree-optimization/108139 gcc/ * gimple-range-cache.cc (ranger_cache::fill_block_cache): Do not use equivalences originating from PHIS. gcc/testsuite/ * gcc.dg/pr108139.c: New.
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