6c36d76bf6
* c-common.c (warn_div_by_zero): New. * c-common.h (warn_div_by_zero): New. * c-decl.c (c_decode_option): Take it on the command line. * c-typeck.c (build_binary_op): Warn about division by zero. * doc/invoke.texi: Document the new command line option, fix documentation of -Wmultichar. * testsuite/gcc.dg/divbyzero.c: New tests. * testsuite/gcc.dg/noncompile/20010524-1.c: Update. From-SVN: r46439
22 lines
633 B
C
22 lines
633 B
C
/* Copyright (C) 2001 Free Software Foundation, Inc. */
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/* { dg-do compile } */
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/* Source: Neil Booth, Oct 22 2001. PR 150 - warn about division by
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zero. */
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#define ZERO (4 - 6 + 2)
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int main (int argc, char *argv[])
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{
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int w = argc % ZERO; /* { dg-warning "division by zero" } */
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int x = argc / 0; /* { dg-warning "division by zero" } */
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int y = argc / ZERO; /* { dg-warning "division by zero" } */
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double z = 0.0 / 0.0 ; /* { dg-bogus "division by zero" } */
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w = (ZERO ? y / ZERO : x); /* { dg-bogus "division by zero" } */
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x = (ZERO ? argc % ZERO: x); /* { dg-bogus "division by zero" } */
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return 0;
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}
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