/* $NetBSD: msg_048.c,v 1.6 2022/06/20 21:13:36 rillig Exp $ */ # 3 "msg_048.c" // Test for message: enumeration value '%s' overflows [48] /* * Before decl.c 1.269 from 2022-04-08, the comparison for enum constant * overflow was done in signed arithmetic, and since 'enumval' wrapped * around, its value became INT_MIN, at least on platforms where integer * overflow was defined as 2-complements wrap-around. When comparing * 'enumval - 1 == TARG_INT_MAX', there was another integer overflow, and * this one was optimized away by GCC, taking advantage of the undefined * behavior. */ enum int_limits { MAX_MINUS_2 = 0x7ffffffd, MAX_MINUS_1, MAX, /* expect+1: warning: enumeration value 'MIN' overflows [48] */ MIN, MIN_PLUS_1 }; |