diff options
author | Lorry <lorry@roadtrain.codethink.co.uk> | 2012-01-09 13:47:42 +0000 |
---|---|---|
committer | Lorry <lorry@roadtrain.codethink.co.uk> | 2012-01-09 13:47:42 +0000 |
commit | b4a5df67f1382a33f4535eb1b10600ca52d294d3 (patch) | |
tree | d4571b191c2cfc0f5045bd27b54f8a48e70787a8 /gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c | |
download | gcc-tarball-b4a5df67f1382a33f4535eb1b10600ca52d294d3.tar.gz |
Tarball conversion
Diffstat (limited to 'gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c')
-rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c b/gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c new file mode 100644 index 0000000000..59ba6fee15 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c @@ -0,0 +1,24 @@ +/* Tail call optimizations would convert func() into the moral equivalent of: + + double acc = 0.0; + for (int i = 0; i <= n; i++) + acc += d; + return acc; + + which mishandles the case where 'd' is -0. They also initialised 'acc' + to a zero int rather than a zero double. */ + +double func (double d, int n) +{ + if (n == 0) + return d; + else + return d + func (d, n - 1); +} + +int main () +{ + if (__builtin_copysign (1.0, func (0.0 / -5.0, 10)) != -1.0) + abort (); + exit (0); +} |