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| author | Doug Gilmore <doug.gilmore@imgtec.com> | 2016-09-23 15:48:01 +0000 |
|---|---|---|
| committer | Matthew Fortune <mpf@gcc.gnu.org> | 2016-09-23 15:48:01 +0000 |
| commit | ed481942e3c90b596b22b5001010a87a505829d5 (patch) | |
| tree | 41b7dc7c48c0ed95a1bd38260399aefda4978939 | |
| parent | 0af06385d3f521d4afc501b7ddc75d94120e17a1 (diff) | |
| download | gcc-ed481942e3c90b596b22b5001010a87a505829d5.zip gcc-ed481942e3c90b596b22b5001010a87a505829d5.tar.gz gcc-ed481942e3c90b596b22b5001010a87a505829d5.tar.bz2 | |
Ensure points-to information is maintained for prefetch.
gcc/
PR tree-optimization/77654
* tree-ssa-alias.c (issue_prefetch_ref): Add call
to duplicate_ssa_name_ptr_info.
From-SVN: r240439
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-ssa-loop-prefetch.c | 12 |
2 files changed, 18 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 14a5518..6262f03 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-09-23 Doug Gilmore <doug.gilmore@imgtec.com> + + PR tree-optimization/77654 + * tree-ssa-alias.c (issue_prefetch_ref): Add call + to duplicate_ssa_name_ptr_info. + 2016-09-23 David Malcolm <dmalcolm@redhat.com> PR preprocessor/77672 diff --git a/gcc/tree-ssa-loop-prefetch.c b/gcc/tree-ssa-loop-prefetch.c index 26cf0a0..056815d 100644 --- a/gcc/tree-ssa-loop-prefetch.c +++ b/gcc/tree-ssa-loop-prefetch.c @@ -39,6 +39,7 @@ along with GCC; see the file COPYING3. If not see #include "tree-ssa-loop-manip.h" #include "tree-ssa-loop-niter.h" #include "tree-ssa-loop.h" +#include "ssa.h" #include "tree-into-ssa.h" #include "cfgloop.h" #include "tree-scalar-evolution.h" @@ -1160,6 +1161,17 @@ issue_prefetch_ref (struct mem_ref *ref, unsigned unroll_factor, unsigned ahead) addr = force_gimple_operand_gsi (&bsi, unshare_expr (addr), true, NULL, true, GSI_SAME_STMT); } + + if (TREE_CODE (addr_base) == SSA_NAME + && TREE_CODE (addr) == SSA_NAME) + { + duplicate_ssa_name_ptr_info (addr, SSA_NAME_PTR_INFO (addr_base)); + /* As this isn't a plain copy we have to reset alignment + information. */ + if (SSA_NAME_PTR_INFO (addr)) + mark_ptr_info_alignment_unknown (SSA_NAME_PTR_INFO (addr)); + } + /* Create the prefetch instruction. */ prefetch = gimple_build_call (builtin_decl_explicit (BUILT_IN_PREFETCH), 3, addr, write_p, local); |