From: Martin Liska Date: Tue, 13 Dec 2016 15:26:14 +0000 (+0100) Subject: Fill bitregion_{start,end} in store_constructor (PR tree-optimization/78428) X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=437df9f9d154c9328e52d967fbecdf72148566e1;p=gcc.git Fill bitregion_{start,end} in store_constructor (PR tree-optimization/78428) * expr.c (store_constructor_field): Add new arguments to the function. (store_constructor): Set up bitregion_end and add gcc_unreachable to fields that have either non-constant size or (and) offset. * gcc.dg/tree-ssa/pr78428.c: New test. From-SVN: r243610 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e2d7b65210e..aa816d95d24 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,12 @@ +2016-12-13 Martin Liska + + PR tree-optimization/78428 + * expr.c (store_constructor_field): Add new arguments to the + function. + (store_constructor): Set up bitregion_end and add + gcc_unreachable to fields that have either non-constant size + or (and) offset. + 2016-12-13 Marek Polacek * tree-data-ref.c (compute_overlap_steps_for_affine_univar): Change diff --git a/gcc/expr.c b/gcc/expr.c index fe752fb8f2b..88da8dd4a3f 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -80,7 +80,8 @@ static void clear_by_pieces (rtx, unsigned HOST_WIDE_INT, unsigned int); static rtx_insn *compress_float_constant (rtx, rtx); static rtx get_subtarget (rtx); static void store_constructor_field (rtx, unsigned HOST_WIDE_INT, - HOST_WIDE_INT, machine_mode, + HOST_WIDE_INT, unsigned HOST_WIDE_INT, + unsigned HOST_WIDE_INT, machine_mode, tree, int, alias_set_type, bool); static void store_constructor (tree, rtx, int, HOST_WIDE_INT, bool); static rtx store_field (rtx, HOST_WIDE_INT, HOST_WIDE_INT, @@ -6077,7 +6078,10 @@ all_zeros_p (const_tree exp) static void store_constructor_field (rtx target, unsigned HOST_WIDE_INT bitsize, - HOST_WIDE_INT bitpos, machine_mode mode, + HOST_WIDE_INT bitpos, + unsigned HOST_WIDE_INT bitregion_start, + unsigned HOST_WIDE_INT bitregion_end, + machine_mode mode, tree exp, int cleared, alias_set_type alias_set, bool reverse) { @@ -6112,8 +6116,8 @@ store_constructor_field (rtx target, unsigned HOST_WIDE_INT bitsize, reverse); } else - store_field (target, bitsize, bitpos, 0, 0, mode, exp, alias_set, false, - reverse); + store_field (target, bitsize, bitpos, bitregion_start, bitregion_end, mode, + exp, alias_set, false, reverse); } @@ -6148,6 +6152,7 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size, { tree type = TREE_TYPE (exp); HOST_WIDE_INT exp_size = int_size_in_bytes (type); + HOST_WIDE_INT bitregion_end = size > 0 ? size * BITS_PER_UNIT - 1 : 0; switch (TREE_CODE (type)) { @@ -6225,7 +6230,7 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size, if (tree_fits_uhwi_p (DECL_SIZE (field))) bitsize = tree_to_uhwi (DECL_SIZE (field)); else - bitsize = -1; + gcc_unreachable (); mode = DECL_MODE (field); if (DECL_BIT_FIELD (field)) @@ -6236,31 +6241,10 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size, && tree_fits_shwi_p (bit_position (field))) { bitpos = int_bit_position (field); - offset = 0; + offset = NULL_TREE; } else - bitpos = tree_to_shwi (DECL_FIELD_BIT_OFFSET (field)); - - if (offset) - { - machine_mode address_mode; - rtx offset_rtx; - - offset - = SUBSTITUTE_PLACEHOLDER_IN_EXPR (offset, - make_tree (TREE_TYPE (exp), - target)); - - offset_rtx = expand_normal (offset); - gcc_assert (MEM_P (to_rtx)); - - address_mode = get_address_mode (to_rtx); - if (GET_MODE (offset_rtx) != address_mode) - offset_rtx = convert_to_mode (address_mode, offset_rtx, 0); - - to_rtx = offset_address (to_rtx, offset_rtx, - highest_pow2_factor (offset)); - } + gcc_unreachable (); /* If this initializes a field that is smaller than a word, at the start of a word, try to widen it to a full @@ -6308,7 +6292,8 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size, MEM_KEEP_ALIAS_SET_P (to_rtx) = 1; } - store_constructor_field (to_rtx, bitsize, bitpos, mode, + store_constructor_field (to_rtx, bitsize, bitpos, + 0, bitregion_end, mode, value, cleared, get_alias_set (TREE_TYPE (field)), reverse); @@ -6468,7 +6453,8 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size, } store_constructor_field - (target, bitsize, bitpos, mode, value, cleared, + (target, bitsize, bitpos, 0, bitregion_end, + mode, value, cleared, get_alias_set (elttype), reverse); } } @@ -6571,7 +6557,8 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size, target = copy_rtx (target); MEM_KEEP_ALIAS_SET_P (target) = 1; } - store_constructor_field (target, bitsize, bitpos, mode, value, + store_constructor_field (target, bitsize, bitpos, 0, + bitregion_end, mode, value, cleared, get_alias_set (elttype), reverse); } @@ -6705,7 +6692,8 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size, ? TYPE_MODE (TREE_TYPE (value)) : eltmode; bitpos = eltpos * elt_size; - store_constructor_field (target, bitsize, bitpos, value_mode, + store_constructor_field (target, bitsize, bitpos, 0, + bitregion_end, value_mode, value, cleared, alias, reverse); } } diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index fa954e539ff..dfdadddaca1 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2016-12-13 Martin Liska + + PR tree-optimization/78428 + * gcc.dg/tree-ssa/pr78428.c: New test. + 2016-12-13 Janus Weil Paul Thomas diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr78428.c b/gcc/testsuite/gcc.dg/tree-ssa/pr78428.c new file mode 100644 index 00000000000..3a9b99c7e03 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr78428.c @@ -0,0 +1,27 @@ +/* PR tree-optimization/78428. */ +/* { dg-options "-O2" } */ +/* { dg-do run } */ + +struct S0 +{ + int f2; + int f3:16; + int f4:18; +} ; + +int a = 5; +struct S0 b = { 3, 0, 0 }; +static struct S0 global[2] = { { 77, 0, 78 }, { 77, 0, 78 } }; + +int main () +{ + volatile struct S0 *j; + for (; a;) + { + __builtin_printf ("", b.f2); + j = &b; + *j = global[1]; + a--; + } + return 0; +}