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re PR tree-optimization/60733 (ICE due to SLSR on valid code at -O3 on x86_64-linux-gnu)

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[gcc]

2014-04-02  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/60733
	* gimple-ssa-strength-reduction.c (ncd_with_phi): Change required
	insertion point for PHI candidates to be the end of the feeding
	block for the PHI argument.

[gcc/testsuite]

2014-04-02  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/60733
	* gcc.dg/torture/pr60733.c:  New test.

From-SVN: r209040
This commit is contained in:
Bill Schmidt 2014-04-02 22:07:30 +00:00 committed by William Schmidt
parent f4581282e5
commit 1e386bb822
4 changed files with 50 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2014-04-02 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/60733
* gimple-ssa-strength-reduction.c (ncd_with_phi): Change required
insertion point for PHI candidates to be the end of the feeding
block for the PHI argument.
2014-04-02 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/60650

4
gcc/gimple-ssa-strength-reduction.c
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@ -3001,10 +3001,10 @@ ncd_with_phi (slsr_cand_t c, double_int incr, gimple phi,
{
slsr_cand_t arg_cand = base_cand_from_table (arg);
double_int diff = arg_cand->index - basis->index;
basic_block pred = gimple_phi_arg_edge (phi, i)->src;
if ((incr == diff) || (!address_arithmetic_p && incr == -diff))
ncd = ncd_for_two_cands (ncd, gimple_bb (arg_cand->cand_stmt),
*where, arg_cand, where);
ncd = ncd_for_two_cands (ncd, pred, *where, NULL, where);
}
}
}

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2014-04-02 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/60733
* gcc.dg/torture/pr60733.c: New test.
2014-04-02 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/60650

36
gcc/testsuite/gcc.dg/torture/pr60733.c Normal file
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@ -0,0 +1,36 @@
/* { dg-do run } */
int a, d, e, f, g, h, i, j, k;
unsigned short b;
short
fn1 (int p1, int p2)
{
return p1 * p2;
}
int
main ()
{
for (; a; a--)
{
int l = 0;
if (f >= 0)
{
for (; h;)
e = 0;
for (; l != -6; l--)
{
j = fn1 (b--, d);
for (g = 0; g; g = 1)
;
k = e ? 2 : 0;
}
i = 0;
for (;;)
;
}
}
d = 0;
return 0;
}