diff options
Diffstat (limited to 'gcc/tree-ssa-loop-prefetch.c')
| -rw-r--r-- | gcc/tree-ssa-loop-prefetch.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/gcc/tree-ssa-loop-prefetch.c b/gcc/tree-ssa-loop-prefetch.c index 54cd942..a137207 100644 --- a/gcc/tree-ssa-loop-prefetch.c +++ b/gcc/tree-ssa-loop-prefetch.c @@ -47,6 +47,7 @@ along with GCC; see the file COPYING3. If not see #include "langhooks.h" #include "tree-inline.h" #include "tree-data-ref.h" +#include "diagnostic-core.h" /* This pass inserts prefetch instructions to optimize cache usage during accesses to arrays in loops. It processes loops sequentially and: @@ -1977,10 +1978,6 @@ tree_ssa_prefetch_arrays (void) set_builtin_decl (BUILT_IN_PREFETCH, decl, false); } - /* We assume that size of cache line is a power of two, so verify this - here. */ - gcc_assert ((PREFETCH_BLOCK & (PREFETCH_BLOCK - 1)) == 0); - FOR_EACH_LOOP (loop, LI_FROM_INNERMOST) { if (dump_file && (dump_flags & TDF_DETAILS)) @@ -2038,6 +2035,21 @@ pass_loop_prefetch::execute (function *fun) if (number_of_loops (fun) <= 1) return 0; + bool warned_p = false; + if ((PREFETCH_BLOCK & (PREFETCH_BLOCK - 1)) != 0) + { + static bool warned = false; + + if (!warned) + { + warning (OPT_Wdisabled_optimization, + "%<l1-cache-size%> parameter is not a power of two %d", + PREFETCH_BLOCK); + warned = true; + } + return 0; + } + return tree_ssa_prefetch_arrays (); } |