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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-12-20 12:52:43 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-12-20 12:52:43 +0000 |
| commit | b506575ff66ca6e62494b000ae68c182c7b22573 (patch) | |
| tree | e4d2e80a14e35c997e7999bb4b24b8acc5b983ee /gcc/tree-ssa-alias.c | |
| parent | 30acf2829633b900ea5fe9a3a00aad1e9a84bf43 (diff) | |
| download | gcc-b506575ff66ca6e62494b000ae68c182c7b22573.zip gcc-b506575ff66ca6e62494b000ae68c182c7b22573.tar.gz gcc-b506575ff66ca6e62494b000ae68c182c7b22573.tar.bz2 | |
poly_int: same_addr_size_stores_p
This patch makes tree-ssa-alias.c:same_addr_size_stores_p handle
poly_int sizes and offsets.
2017-12-20 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* tree-ssa-alias.c (same_addr_size_stores_p): Take the offsets and
sizes as poly_int64s rather than HOST_WIDE_INTs.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r255870
Diffstat (limited to 'gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc/tree-ssa-alias.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 5340fd3..4d46162 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -2320,14 +2320,14 @@ stmt_may_clobber_ref_p (gimple *stmt, tree ref) address. */ static bool -same_addr_size_stores_p (tree base1, HOST_WIDE_INT offset1, HOST_WIDE_INT size1, - HOST_WIDE_INT max_size1, - tree base2, HOST_WIDE_INT offset2, HOST_WIDE_INT size2, - HOST_WIDE_INT max_size2) +same_addr_size_stores_p (tree base1, poly_int64 offset1, poly_int64 size1, + poly_int64 max_size1, + tree base2, poly_int64 offset2, poly_int64 size2, + poly_int64 max_size2) { /* Offsets need to be 0. */ - if (offset1 != 0 - || offset2 != 0) + if (maybe_ne (offset1, 0) + || maybe_ne (offset2, 0)) return false; bool base1_obj_p = SSA_VAR_P (base1); @@ -2346,17 +2346,19 @@ same_addr_size_stores_p (tree base1, HOST_WIDE_INT offset1, HOST_WIDE_INT size1, tree memref = base1_memref_p ? base1 : base2; /* Sizes need to be valid. */ - if (max_size1 == -1 || max_size2 == -1 - || size1 == -1 || size2 == -1) + if (!known_size_p (max_size1) + || !known_size_p (max_size2) + || !known_size_p (size1) + || !known_size_p (size2)) return false; /* Max_size needs to match size. */ - if (max_size1 != size1 - || max_size2 != size2) + if (maybe_ne (max_size1, size1) + || maybe_ne (max_size2, size2)) return false; /* Sizes need to match. */ - if (size1 != size2) + if (maybe_ne (size1, size2)) return false; @@ -2384,10 +2386,9 @@ same_addr_size_stores_p (tree base1, HOST_WIDE_INT offset1, HOST_WIDE_INT size1, /* Check that the object size is the same as the store size. That ensures us that ptr points to the start of obj. */ - if (!tree_fits_shwi_p (DECL_SIZE (obj))) - return false; - HOST_WIDE_INT obj_size = tree_to_shwi (DECL_SIZE (obj)); - return obj_size == size1; + return (DECL_SIZE (obj) + && poly_int_tree_p (DECL_SIZE (obj)) + && known_eq (wi::to_poly_offset (DECL_SIZE (obj)), size1)); } /* If STMT kills the memory reference REF return true, otherwise |