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re PR tree-optimization/51466 (ICE in gimple_rhs_has_side_effects,) 

PR tree-optimization/51466
	* tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Also copy
	TREE_SIDE_EFFECTS.

	* gcc.c-torture/execute/pr51466.c: New test.

From-SVN: r182136
This commit is contained in:
Jakub Jelinek 2011-12-08 20:49:02 +01:00 committed by Jakub Jelinek
parent 3215710740
commit 4be257dcc4
4 changed files with 58 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-12-08 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/51466
* tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Also copy
TREE_SIDE_EFFECTS.
2011-12-08 Richard Guenther <rguenther@suse.de>
* tree-ssa-operands.c (add_stmt_operand): Do not mark stmts

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2011-12-08 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/51466
* gcc.c-torture/execute/pr51466.c: New test.
2011-12-08 Tobias Burnus <burnus@net-b.de>
PR fortran/50815

43
gcc/testsuite/gcc.c-torture/execute/pr51466.c Normal file
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@ -0,0 +1,43 @@
/* PR tree-optimization/51466 */
extern void abort (void);
__attribute__((noinline, noclone)) int
foo (int i)
{
volatile int v[4];
int *p;
v[i] = 6;
p = (int *) &v[i];
return *p;
}
__attribute__((noinline, noclone)) int
bar (int i)
{
volatile int v[4];
int *p;
v[i] = 6;
p = (int *) &v[i];
*p = 8;
return v[i];
}
__attribute__((noinline, noclone)) int
baz (int i)
{
volatile int v[4];
int *p;
v[i] = 6;
p = (int *) &v[0];
*p = 8;
return v[i];
}
int
main ()
{
if (foo (3) != 6 || bar (2) != 8 || baz (0) != 8 || baz (1) != 6)
abort ();
return 0;
}

4
gcc/tree-ssa-forwprop.c
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@ -929,10 +929,12 @@ forward_propagate_addr_expr_1 (tree name, tree def_rhs,
*def_rhs_basep = build2 (MEM_REF, TREE_TYPE (*def_rhs_basep),
new_base, new_offset);
TREE_THIS_VOLATILE (*def_rhs_basep) = TREE_THIS_VOLATILE (lhs);
TREE_SIDE_EFFECTS (*def_rhs_basep) = TREE_SIDE_EFFECTS (lhs);
TREE_THIS_NOTRAP (*def_rhs_basep) = TREE_THIS_NOTRAP (lhs);
new_lhs = unshare_expr (TREE_OPERAND (def_rhs, 0));
gimple_assign_set_lhs (use_stmt, new_lhs);
TREE_THIS_VOLATILE (new_lhs) = TREE_THIS_VOLATILE (lhs);
TREE_SIDE_EFFECTS (new_lhs) = TREE_SIDE_EFFECTS (lhs);
*def_rhs_basep = saved;
tidy_after_forward_propagate_addr (use_stmt);
/* Continue propagating into the RHS if this was not the
@ -1011,10 +1013,12 @@ forward_propagate_addr_expr_1 (tree name, tree def_rhs,
*def_rhs_basep = build2 (MEM_REF, TREE_TYPE (*def_rhs_basep),
new_base, new_offset);
TREE_THIS_VOLATILE (*def_rhs_basep) = TREE_THIS_VOLATILE (rhs);
TREE_SIDE_EFFECTS (*def_rhs_basep) = TREE_SIDE_EFFECTS (rhs);
TREE_THIS_NOTRAP (*def_rhs_basep) = TREE_THIS_NOTRAP (rhs);
new_rhs = unshare_expr (TREE_OPERAND (def_rhs, 0));
gimple_assign_set_rhs1 (use_stmt, new_rhs);
TREE_THIS_VOLATILE (new_rhs) = TREE_THIS_VOLATILE (rhs);
TREE_SIDE_EFFECTS (new_rhs) = TREE_SIDE_EFFECTS (rhs);
*def_rhs_basep = saved;
fold_stmt_inplace (use_stmt_gsi);
tidy_after_forward_propagate_addr (use_stmt);