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.c-torture/execute/builtin-prefetch-5.c | 60 ++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-5.c (limited to 'gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-5.c') diff --git a/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-5.c b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-5.c new file mode 100644 index 000000000..f42a2c0ca --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-5.c @@ -0,0 +1,60 @@ +/* Test that __builtin_prefetch does no harm. + + Use addresses that are unlikely to be word-aligned. Some targets + have alignment requirements for prefetch addresses, so make sure the + compiler takes care of that. This fails if it aborts, anything else + is OK. */ + +struct S { + short a; + short b; + char c[8]; +} s; + +char arr[100]; +char *ptr = arr; +int idx = 3; + +void +arg_ptr (char *p) +{ + __builtin_prefetch (p, 0, 0); +} + +void +arg_idx (char *p, int i) +{ + __builtin_prefetch (&p[i], 0, 0); +} + +void +glob_ptr (void) +{ + __builtin_prefetch (ptr, 0, 0); +} + +void +glob_idx (void) +{ + __builtin_prefetch (&ptr[idx], 0, 0); +} + +int +main () +{ + __builtin_prefetch (&s.b, 0, 0); + __builtin_prefetch (&s.c[1], 0, 0); + + arg_ptr (&s.c[1]); + arg_ptr (ptr+3); + arg_idx (ptr, 3); + arg_idx (ptr+1, 2); + idx = 3; + glob_ptr (); + glob_idx (); + ptr++; + idx = 2; + glob_ptr (); + glob_idx (); + exit (0); +} -- cgit v1.2.3