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tree-vect-analyze.c (vect_enhance_data_refs_alignment): Copy UNITS_PER_SIMD_WORD to a local variable to avoid a "division by zero" error.

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* tree-vect-analyze.c (vect_enhance_data_refs_alignment): Copy
        UNITS_PER_SIMD_WORD to a local variable to avoid a "division by zero"
        error.

Co-Authored-By: Dorit Naishlos <dorit@il.ibm.com>

From-SVN: r96552
This commit is contained in:
Steven Bosscher 2005-03-16 11:47:38 +00:00 committed by Dorit Nuzman
parent b0ea9c011d
commit 00c714edd6
2 changed files with 15 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2005-03-16 Steven Bosscher <stevenb@suse.de>
Dorit Naishlos <dorit@il.ibm.com>
* tree-vect-analyze.c (vect_enhance_data_refs_alignment): Copy
UNITS_PER_SIMD_WORD to a local variable to avoid a "division by zero"
error.
2005-03-16 Steven Bosscher <stevenb@suse.de>
* tree-inline.c (walk_type_fields, walk_tree,

9
gcc/tree-vect-analyze.c
View File

@ -1013,6 +1013,13 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
struct data_reference *dr0 = NULL;
unsigned int i, j;
/* Sigh, a hack to make targets that do not define UNITS_PER_SIMD_WORD
bootstrap. Copy UNITS_PER_SIMD_WORD to a local variable to avoid a
"division by zero" error. This error would be issued because we
we do "... % UNITS_PER_SIMD_WORD" below, and UNITS_PER_SIMD_WORD
defaults to 0 if it is not defined by the target. */
int units_per_simd_word = UNITS_PER_SIMD_WORD;
/*
This pass will require a cost model to guide it whether to apply peeling
or versioning or a combination of the two. For example, the scheme that
@ -1167,7 +1174,7 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
int drsize = GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (DR_REF (dr))));
DR_MISALIGNMENT (dr) += npeel * drsize;
DR_MISALIGNMENT (dr) %= UNITS_PER_SIMD_WORD;
DR_MISALIGNMENT (dr) %= units_per_simd_word;
}
else
DR_MISALIGNMENT (dr) = -1;