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| author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
|---|---|---|
| committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
| commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
| tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/gcc.dg/Walways-true-2.c | |
| download | cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2 cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz | |
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Diffstat (limited to 'gcc/testsuite/gcc.dg/Walways-true-2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/Walways-true-2.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/Walways-true-2.c b/gcc/testsuite/gcc.dg/Walways-true-2.c new file mode 100644 index 000000000..7f0bb7b10 --- /dev/null +++ b/gcc/testsuite/gcc.dg/Walways-true-2.c @@ -0,0 +1,60 @@ +/* Make sure we don't assume that a weak symbol is always non-NULL. + This is just like Walways-true-1.C, except that it uses a weak + symbol. + Origin: Ian Lance Taylor <iant@google.com>. */ + +/* { dg-do compile } */ +/* { dg-options "-Waddress" } */ +/* { dg-require-weak "" } */ + +extern int foo (int) __attribute__ ((weak)); + +int i __attribute__ ((weak)); + +void +bar (int a) +{ + lab: + if (foo) + foo (0); + if (foo (1)) + ; + if (&i) + foo (2); + if (i) + foo (3); + if (&a) /* { dg-warning "always evaluate as" "correct warning" } */ + foo (4); + if (a) + foo (5); + if (&&lab) /* { dg-warning "always evaluate as" "correct warning" } */ + foo (6); + if (foo == 0) + foo (7); + if (foo (1) == 0) + foo (8); + if (&i == 0) + foo (9); + if (i == 0) + foo (10); + if (&a == 0) /* { dg-warning "the comparison will always evaluate as 'false'" "correct warning" } */ + foo (11); + if (a == 0) + foo (12); + if (&&lab == 0) /* { dg-warning "the comparison will always evaluate as 'false'" "correct warning" } */ + foo (13); + if (0 == foo) + foo (14); + if (0 == foo (1)) + foo (15); + if (0 == &i) + foo (16); + if (0 == i) + foo (17); + if (0 == &a) /* { dg-warning "the comparison will always evaluate as 'false'" "correct warning" } */ + foo (18); + if (0 == a) + foo (19); + if (0 == &&lab) /* { dg-warning "the comparison will always evaluate as 'false'" "correct warning" } */ + foo (20); +} |