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| author | Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> | 2021-10-15 13:52:49 +0200 |
|---|---|---|
| committer | Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> | 2021-10-15 13:52:49 +0200 |
| commit | cbcba1eb28db3c2540957ccb3779f750daea6099 (patch) | |
| tree | f2132faf818dc7599ea89da52e9864285a0c19e6 /gcc/tree-loop-distribution.c | |
| parent | 914e9172792737606595216e2b77c104abba7c5c (diff) | |
| download | gcc-cbcba1eb28db3c2540957ccb3779f750daea6099.zip gcc-cbcba1eb28db3c2540957ccb3779f750daea6099.tar.gz gcc-cbcba1eb28db3c2540957ccb3779f750daea6099.tar.bz2 | |
tree-optimization/102752: Fix determining precission of reduction_var
While determining the precission of reduction_var an SSA_NAME instead of
its TREE_TYPE is used. Streamlined with other TREE_TYPE (reduction_var)
uses.
gcc/ChangeLog:
* tree-loop-distribution.c (reduction_var_overflows_first):
Pass the type of reduction_var as first argument as it is also
done for the load type.
(loop_distribution::transform_reduction_loop): Add missing
TREE_TYPE while determining precission of reduction_var.
Diffstat (limited to 'gcc/tree-loop-distribution.c')
| -rw-r--r-- | gcc/tree-loop-distribution.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/gcc/tree-loop-distribution.c b/gcc/tree-loop-distribution.c index fb92500..583c01a 100644 --- a/gcc/tree-loop-distribution.c +++ b/gcc/tree-loop-distribution.c @@ -3425,12 +3425,12 @@ generate_strlen_builtin_using_rawmemchr (loop_p loop, tree reduction_var, /* Return true if we can count at least as many characters by taking pointer difference as we can count via reduction_var without an overflow. Thus - compute 2^n < (2^(m-1) / s) where n = TYPE_PRECISION (reduction_var), + compute 2^n < (2^(m-1) / s) where n = TYPE_PRECISION (reduction_var_type), m = TYPE_PRECISION (ptrdiff_type_node), and s = size of each character. */ static bool -reduction_var_overflows_first (tree reduction_var, tree load_type) +reduction_var_overflows_first (tree reduction_var_type, tree load_type) { - widest_int n2 = wi::lshift (1, TYPE_PRECISION (reduction_var));; + widest_int n2 = wi::lshift (1, TYPE_PRECISION (reduction_var_type));; widest_int m2 = wi::lshift (1, TYPE_PRECISION (ptrdiff_type_node) - 1); widest_int s = wi::to_widest (TYPE_SIZE_UNIT (load_type)); return wi::ltu_p (n2, wi::udiv_trunc (m2, s)); @@ -3654,6 +3654,7 @@ loop_distribution::transform_reduction_loop (loop_p loop) && integer_onep (reduction_iv.step)) { location_t loc = gimple_location (DR_STMT (load_dr)); + tree reduction_var_type = TREE_TYPE (reduction_var); /* While determining the length of a string an overflow might occur. If an overflow only occurs in the loop implementation and not in the strlen implementation, then either the overflow is undefined or the @@ -3680,8 +3681,8 @@ loop_distribution::transform_reduction_loop (loop_p loop) && TYPE_PRECISION (load_type) == TYPE_PRECISION (char_type_node) && ((TYPE_PRECISION (sizetype) >= TYPE_PRECISION (ptr_type_node) - 1 && TYPE_PRECISION (ptr_type_node) >= 32) - || (TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (reduction_var)) - && TYPE_PRECISION (reduction_var) <= TYPE_PRECISION (sizetype))) + || (TYPE_OVERFLOW_UNDEFINED (reduction_var_type) + && TYPE_PRECISION (reduction_var_type) <= TYPE_PRECISION (sizetype))) && builtin_decl_implicit (BUILT_IN_STRLEN)) generate_strlen_builtin (loop, reduction_var, load_iv.base, reduction_iv.base, loc); @@ -3689,8 +3690,8 @@ loop_distribution::transform_reduction_loop (loop_p loop) != CODE_FOR_nothing && ((TYPE_PRECISION (ptrdiff_type_node) == TYPE_PRECISION (ptr_type_node) && TYPE_PRECISION (ptrdiff_type_node) >= 32) - || (TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (reduction_var)) - && reduction_var_overflows_first (reduction_var, load_type)))) + || (TYPE_OVERFLOW_UNDEFINED (reduction_var_type) + && reduction_var_overflows_first (reduction_var_type, load_type)))) generate_strlen_builtin_using_rawmemchr (loop, reduction_var, load_iv.base, load_type, |