re PR tree-optimization/58228 (wrong code (with vectorization?) at -O3 on x86_64-linux-gnu)
2013-08-30 Richard Biener <rguenther@suse.de> PR tree-optimization/58228 * tree-vect-data-refs.c (vect_analyze_data_ref_access): Do not allow invariant loads in nested loop vectorization. * gcc.dg/torture/pr58228.c: New testcase. From-SVN: r202097
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2013-08-30 Richard Biener <rguenther@suse.de>
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PR tree-optimization/58228
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* tree-vect-data-refs.c (vect_analyze_data_ref_access): Do not
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allow invariant loads in nested loop vectorization.
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2013-08-30 Richard Biener <rguenther@suse.de>
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PR tree-optimization/58223
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2013-08-30 Richard Biener <rguenther@suse.de>
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PR tree-optimization/58228
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* gcc.dg/torture/pr58228.c: New testcase.
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2013-08-30 Richard Biener <rguenther@suse.de>
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PR tree-optimization/58223
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/* { dg-do run } */
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extern void abort (void);
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int a[8][8] = {{1}};
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int b, c, d, e;
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int main ()
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{
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for (c = 0; c < 8; c++)
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for (b = 0; b < 2; b++)
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a[b + 4][c] = a[c][0];
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if (a[4][4] != 1)
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abort ();
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return 0;
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}
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@ -2271,10 +2271,17 @@ vect_analyze_data_ref_access (struct data_reference *dr)
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return false;
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}
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/* Allow invariant loads in loops. */
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/* Allow invariant loads in not nested loops. */
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if (loop_vinfo && integer_zerop (step))
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{
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GROUP_FIRST_ELEMENT (vinfo_for_stmt (stmt)) = NULL;
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if (nested_in_vect_loop_p (loop, stmt))
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{
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if (dump_enabled_p ())
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dump_printf_loc (MSG_NOTE, vect_location,
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"zero step in inner loop of nest");
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return false;
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}
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return DR_IS_READ (dr);
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}
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