efc9ccbfd0
In 4.8 and earlier we used to fold the following to 0 during GENERIC folding, but we don't do that anymore because ctor_for_folding etc. has been turned into a GIMPLE centric API, but as the testcase shows, it is invoked even during GENERIC folding and there the automatic vars still should have meaningful initializers. I've verified that the C++ FE drops TREE_READONLY on automatic vars with const qualified types if they require non-constant (runtime) initialization. 2021-01-27 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/97260 * varpool.c: Include tree-pass.h. (ctor_for_folding): In GENERIC return DECL_INITIAL for TREE_READONLY non-TREE_SIDE_EFFECTS automatic variables. * gcc.dg/tree-ssa/pr97260.c: New test. |
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