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/991228-1.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 gcc/testsuite/gcc.c-torture/execute/991228-1.c (limited to 'gcc/testsuite/gcc.c-torture/execute/991228-1.c') diff --git a/gcc/testsuite/gcc.c-torture/execute/991228-1.c b/gcc/testsuite/gcc.c-torture/execute/991228-1.c new file mode 100644 index 000000000..c6fe78e7d --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/991228-1.c @@ -0,0 +1,25 @@ +__extension__ union { double d; int i[2]; } u = { d: -0.25 }; + +/* This assumes the endianness of words in a long long is the same as + that for doubles, which doesn't hold for a few platforms, but we + can probably special case them here, as appropriate. */ +long long endianness_test = 1; +#define MSW (*(int*)&endianness_test) + +int +signbit(double x) +{ + __extension__ union { double d; int i[2]; } u = { d: x }; + return u.i[MSW] < 0; +} + +int main(void) +{ + if (2*sizeof(int) != sizeof(double) || u.i[MSW] >= 0) + exit(0); + + if (!signbit(-0.25)) + abort(); + + exit(0); +} -- cgit v1.2.3