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tree-vrp.c (maybe_add_assert_expr): Don't assert ASSERT_EXPRs for single-use variable.

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* tree-vrp.c (maybe_add_assert_expr): Don't assert
	ASSERT_EXPRs for single-use variable.

From-SVN: r98278
This commit is contained in:
Kazu Hirata 2005-04-17 17:57:10 +00:00 committed by Kazu Hirata
parent 30abf79348
commit 838bdb3549
2 changed files with 11 additions and 0 deletions
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3
gcc/ChangeLog
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@ -3,6 +3,9 @@
* tree-vrp.c (compare_values): Check that VAL1 and VAL2 are
both pointers or both integers.
* tree-vrp.c (maybe_add_assert_expr): Don't assert
ASSERT_EXPRs for single-use variable.
2005-04-17 Richard Sandiford <rsandifo@redhat.com>
* config/mips/iris6.h (DRIVER_SELF_SPECS): Check -march as well as

8
gcc/tree-vrp.c
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@ -1446,6 +1446,14 @@ maybe_add_assert_expr (basic_block bb)
{
tree cond;
/* If OP is used only once, namely in this STMT, don't
bother inserting an ASSERT_EXPR for it. Such an
ASSERT_EXPR would do nothing but increase compile time.
Experiments show that with this simple check, we can save
more than 20% of ASSERT_EXPRs. */
if (has_single_use (op))
continue;
SET_BIT (found, SSA_NAME_VERSION (op));
cond = infer_value_range (stmt, op);