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.dg/duff-3.c | 47 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/duff-3.c (limited to 'gcc/testsuite/gcc.dg/duff-3.c') diff --git a/gcc/testsuite/gcc.dg/duff-3.c b/gcc/testsuite/gcc.dg/duff-3.c new file mode 100644 index 000000000..23cddeff9 --- /dev/null +++ b/gcc/testsuite/gcc.dg/duff-3.c @@ -0,0 +1,47 @@ +/* Duff's device is legal C; test to make sure the compiler + doesn't complain about it. + + Jason Thorpe + Derived from Tom Duff's original usenet message about the device. */ + +/* { dg-do run } */ +/* { dg-options "-O2" } */ + +extern void abort (void); +extern void exit (int); + +typedef __SIZE_TYPE__ size_t; +extern int memcmp (const void *, const void *, size_t); + +void +duffcpy (char *dst, const char *src, unsigned long size) +{ + unsigned long n = (size + 7) / 8; + + switch (size % 8) + { + case 0: do { *dst++ = *src++; + case 7: *dst++ = *src++; + case 6: *dst++ = *src++; + case 5: *dst++ = *src++; + case 4: *dst++ = *src++; + case 3: *dst++ = *src++; + case 2: *dst++ = *src++; + case 1: *dst++ = *src++; + } while (--n > 0); + } +} + +const char testpat[] = "The quick brown fox jumped over the lazy dog."; + +int +main() +{ + char buf[64]; + + duffcpy (buf, testpat, sizeof (testpat)); + if (memcmp (buf, testpat, sizeof (testpat)) != 0) + abort (); + + exit (0); +} -- cgit v1.2.3