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tree-vrp.c (stmt_interesting_for_vrp): Some statements with virtual operands are interesting.

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* tree-vrp.c (stmt_interesting_for_vrp): Some statements with
	virtual operands are interesting.
	(vrp_visit_stmt): Corresponding changes.

	* gcc.dg/tree-ssa/20030807-2.c: No longer expected to fail.

From-SVN: r112011
This commit is contained in:
Jeff Law 2006-03-13 09:32:34 -07:00 committed by Jeff Law
parent 96c30d2afc
commit 2bbec6d92d
4 changed files with 34 additions and 5 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2006-03-13 Jeff Law <law@redhat.com>
* tree-vrp.c (stmt_interesting_for_vrp): Some statements with
virtual operands are interesting.
(vrp_visit_stmt): Corresponding changes.
2006-03-13 Bernd Schmidt <bernd.schmidt@analog.com>
* config/bfin/lib1funcs.asm (___umodsi3): Use stack to save contents

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2006-03-13 Jeff Law <law@redhat.com>
* gcc.dg/tree-ssa/20030807-2.c: No longer expected to fail.
2006-03-13 Eric Botcazou <ebotcazou@adacore.com>
* gcc.dg/switch-9.c: New test.

2
gcc/testsuite/gcc.dg/tree-ssa/20030807-2.c
View File

@ -24,5 +24,5 @@ foo(int n)
/* There should be no IF conditionals. */
/* { dg-final { scan-tree-dump-times "if " 0 "dom3" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump-times "if " 0 "dom3" } } */
/* { dg-final { cleanup-tree-dump "dom3" } } */

27
gcc/tree-vrp.c
View File

@ -3266,11 +3266,19 @@ stmt_interesting_for_vrp (tree stmt)
else if (TREE_CODE (stmt) == MODIFY_EXPR)
{
tree lhs = TREE_OPERAND (stmt, 0);
tree rhs = TREE_OPERAND (stmt, 1);
/* In general, assignments with virtual operands are not useful
for deriving ranges, with the obvious exception of calls to
builtin functions. */
if (TREE_CODE (lhs) == SSA_NAME
&& (INTEGRAL_TYPE_P (TREE_TYPE (lhs))
|| POINTER_TYPE_P (TREE_TYPE (lhs)))
&& ZERO_SSA_OPERANDS (stmt, SSA_OP_ALL_VIRTUALS))
&& ((TREE_CODE (rhs) == CALL_EXPR
&& TREE_CODE (TREE_OPERAND (rhs, 0)) == ADDR_EXPR
&& DECL_P (TREE_OPERAND (TREE_OPERAND (rhs, 0), 0))
&& DECL_IS_BUILTIN (TREE_OPERAND (TREE_OPERAND (rhs, 0), 0)))
|| ZERO_SSA_OPERANDS (stmt, SSA_OP_ALL_VIRTUALS)))
return true;
}
else if (TREE_CODE (stmt) == COND_EXPR || TREE_CODE (stmt) == SWITCH_EXPR)
@ -3739,9 +3747,20 @@ vrp_visit_stmt (tree stmt, edge *taken_edge_p, tree *output_p)
}
ann = stmt_ann (stmt);
if (TREE_CODE (stmt) == MODIFY_EXPR
&& ZERO_SSA_OPERANDS (stmt, SSA_OP_ALL_VIRTUALS))
return vrp_visit_assignment (stmt, output_p);
if (TREE_CODE (stmt) == MODIFY_EXPR)
{
tree rhs = TREE_OPERAND (stmt, 1);
/* In general, assignments with virtual operands are not useful
for deriving ranges, with the obvious exception of calls to
builtin functions. */
if ((TREE_CODE (rhs) == CALL_EXPR
&& TREE_CODE (TREE_OPERAND (rhs, 0)) == ADDR_EXPR
&& DECL_P (TREE_OPERAND (TREE_OPERAND (rhs, 0), 0))
&& DECL_IS_BUILTIN (TREE_OPERAND (TREE_OPERAND (rhs, 0), 0)))
|| ZERO_SSA_OPERANDS (stmt, SSA_OP_ALL_VIRTUALS))
return vrp_visit_assignment (stmt, output_p);
}
else if (TREE_CODE (stmt) == COND_EXPR || TREE_CODE (stmt) == SWITCH_EXPR)
return vrp_visit_cond_stmt (stmt, taken_edge_p);