From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c | 24 +++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c (limited to 'gcc/testsuite/gcc.c-torture/execute/ieee/mzero6.c') 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 000000000..59ba6fee1 --- /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); +} -- cgit v1.2.3