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gcc/ChangeLog: PR tree-optimization/18046 * genmodes.c (emit_mode_size_inline): Emit an assert that verifies that mode is a valid array index. (emit_mode_nuinits_inline): Likewise. (emit_mode_inner_inline): Likewise. (emit_mode_unit_size_inline): Likewise. (emit_mode_unit_precision_inline): Likewise. * tree-vrp.c: Include params.h. (find_switch_asserts): Register edge assertions for the default label which correspond to the anti-ranges of each case label. * params.def (PARAM_MAX_VRP_SWITCH_ASSERTIONS): New. * doc/invoke.texi: Document it. gcc/testsuite/ChangeLog: PR tree-optimization/18046 * gcc.dg/tree-ssa/ssa-dom-thread-6.c: Bump FSM count to 5. * gcc.dg/tree-ssa/vrp103.c: New test. * gcc.dg/tree-ssa/vrp104.c: New test. From-SVN: r238761
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