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| author | Changpeng Fang <changpeng.fang@amd.com> | 2010-08-23 17:45:08 +0000 |
|---|---|---|
| committer | Changpeng Fang <cfang@gcc.gnu.org> | 2010-08-23 17:45:08 +0000 |
| commit | bc068a23d095cf8bc0126c663fee5e8c50c6699c (patch) | |
| tree | 9db10ff1386e8c9e1c0147f462aacb0ee6eaab28 /gcc/tree-ssa-loop-prefetch.c | |
| parent | f8895c4b7f7014fa8daf1d71e3c33c9bf933db97 (diff) | |
| download | gcc-bc068a23d095cf8bc0126c663fee5e8c50c6699c.zip gcc-bc068a23d095cf8bc0126c663fee5e8c50c6699c.tar.gz gcc-bc068a23d095cf8bc0126c663fee5e8c50c6699c.tar.bz2 | |
pr45260 Don't generate prefetch if the address of base could not be taken.
* tree-flow.h (may_be_nonaddressable_p): New definition. Make the
existing static function global.
*tree-ssa-loop-ivopts.c (may_be_nonaddressable_p): This function
is changed to global.
*tree-ssa-loop-prefetch.c (gather_memory_references_ref): Call
may_be_nonaddressable_p on base, and don't collect this reference
if the address of the base could not be taken.
From-SVN: r163475
Diffstat (limited to 'gcc/tree-ssa-loop-prefetch.c')
| -rw-r--r-- | gcc/tree-ssa-loop-prefetch.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-ssa-loop-prefetch.c b/gcc/tree-ssa-loop-prefetch.c index 9ad6cd2..4e7068f 100644 --- a/gcc/tree-ssa-loop-prefetch.c +++ b/gcc/tree-ssa-loop-prefetch.c @@ -539,6 +539,10 @@ gather_memory_references_ref (struct loop *loop, struct mem_ref_group **refs, if (step == NULL_TREE) return false; + /* Stop if the address of BASE could not taken. */ + if (may_be_nonaddressable_p (base)) + return false; + /* Limit non-constant step prefetching only to the innermost loops. */ if (!cst_and_fits_in_hwi (step) && loop->inner != NULL) return false; |