Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/uninit-26.c @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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/* { dg-do compile } */ /* { dg-options "-O -Wmaybe-uninitialized" } */ extern unsigned bar (void); extern void quux (void); unsigned foo (unsigned v) { unsigned u; if (v != 100) u = bar (); // Prevent the "dom" pass from changing the CFG layout based on the inference // 'if (v != 100) is false then (v < 105) is true'. (Now it would have to // duplicate the loop in order to do so, which is deemed expensive.) for (int i = 0; i < 10; i++) quux (); if (v < 105) /* v == 100 falls into this range. */ return u; /* { dg-warning "may be used uninitialized" } */ return 0; }