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re PR middle-end/71874 (memmove works wrong)

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PR middle-end/71874
	* gimple-fold.c (fold_builtin_memory_op): Use
	get_addr_base_and_unit_offset instead of get_ref_base_and_extent.

	* g++.dg/torture/pr71874.C: New test.

From-SVN: r238484
This commit is contained in:
Jakub Jelinek 2016-07-19 19:30:05 +02:00 • committed by Jakub Jelinek
parent 13da0507f3
commit 4fda19ef2b
4 changed files with 29 additions and 9 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-07-19 Jakub Jelinek <jakub@redhat.com>
PR middle-end/71874
* gimple-fold.c (fold_builtin_memory_op): Use
get_addr_base_and_unit_offset instead of get_ref_base_and_extent.
2016-07-19 Uros Bizjak <ubizjak@gmail.com>
* builtins.c: Use HOST_WIDE_INT_1 instead of (HOST_WIDE_INT) 1,

17
gcc/gimple-fold.c
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@ -796,22 +796,21 @@ gimple_fold_builtin_memory_op (gimple_stmt_iterator *gsi,
{
tree src_base, dest_base, fn;
HOST_WIDE_INT src_offset = 0, dest_offset = 0;
HOST_WIDE_INT size = -1;
HOST_WIDE_INT maxsize = -1;
bool reverse;
HOST_WIDE_INT maxsize;
srcvar = TREE_OPERAND (src, 0);
src_base = get_ref_base_and_extent (srcvar, &src_offset,
&size, &maxsize, &reverse);
src_base = get_addr_base_and_unit_offset (srcvar, &src_offset);
if (src_base == NULL)
src_base = srcvar;
destvar = TREE_OPERAND (dest, 0);
dest_base = get_ref_base_and_extent (destvar, &dest_offset,
&size, &maxsize, &reverse);
dest_base = get_addr_base_and_unit_offset (destvar,
&dest_offset);
if (dest_base == NULL)
dest_base = destvar;
if (tree_fits_uhwi_p (len))
maxsize = tree_to_uhwi (len);
else
maxsize = -1;
src_offset /= BITS_PER_UNIT;
dest_offset /= BITS_PER_UNIT;
if (SSA_VAR_P (src_base)
&& SSA_VAR_P (dest_base))
{

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2016-07-19 Jakub Jelinek <jakub@redhat.com>
PR middle-end/71874
* g++.dg/torture/pr71874.C: New test.
PR middle-end/71734
* g++.dg/vect/pr70729.cc: Don't include string.h or xmmintrin.h.
(my_alloc): Rewritten to use __builtin_posix_memalign and

12
gcc/testsuite/g++.dg/torture/pr71874.C Normal file
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@ -0,0 +1,12 @@
// PR middle-end/71874
// { dg-do run }
int
main ()
{
char str[] = "abcdefghijklmnopqrstuvwxyzABCDEF";
__builtin_memmove (str + 20, str + 15, 11);
if (__builtin_strcmp (str, "abcdefghijklmnopqrstpqrstuvwxyzF") != 0)
__builtin_abort ();
return 0;
}