diff options
| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-12-21 07:01:38 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-12-21 07:01:38 +0000 |
| commit | e7301f5fcbfa649beb05da1e3508db7fc7c4d26b (patch) | |
| tree | 78865bf62d706915d434176a2fbc7d8632a24802 /gcc/fold-const.c | |
| parent | f8f667be749428f92a33d6c4ff8b56538f958c10 (diff) | |
| download | gcc-e7301f5fcbfa649beb05da1e3508db7fc7c4d26b.zip gcc-e7301f5fcbfa649beb05da1e3508db7fc7c4d26b.tar.gz gcc-e7301f5fcbfa649beb05da1e3508db7fc7c4d26b.tar.bz2 | |
poly_int: bit_field_size/offset
verify_expr ensured that the size and offset in gimple BIT_FIELD_REFs
satisfied tree_fits_uhwi_p. This patch extends that so that they can
be poly_uint64s, and adds helper routines for accessing them when the
verify_expr requirements apply.
2017-12-21 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* tree.h (bit_field_size, bit_field_offset): New functions.
* hsa-gen.c (gen_hsa_addr): Use them.
* tree-ssa-forwprop.c (simplify_bitfield_ref): Likewise.
(simplify_vector_constructor): Likewise.
* tree-ssa-sccvn.c (copy_reference_ops_from_ref): Likewise.
* tree-cfg.c (verify_expr): Require the sizes and offsets of a
BIT_FIELD_REF to be poly_uint64s rather than uhwis.
* fold-const.c (fold_ternary_loc): Protect tree_to_uhwi with
tree_fits_uhwi_p.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r255926
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 2039d4d..b21f35a 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -11632,7 +11632,9 @@ fold_ternary_loc (location_t loc, enum tree_code code, tree type, fold (nearly) all BIT_FIELD_REFs. */ if (CONSTANT_CLASS_P (arg0) && can_native_interpret_type_p (type) - && BITS_PER_UNIT == 8) + && BITS_PER_UNIT == 8 + && tree_fits_uhwi_p (op1) + && tree_fits_uhwi_p (op2)) { unsigned HOST_WIDE_INT bitpos = tree_to_uhwi (op2); unsigned HOST_WIDE_INT bitsize = tree_to_uhwi (op1); |