r16-189-g99aa410f5e0a72 fixed the case where match-and-simplify there was an
extra
assignment happening inside the sequence return. phiopt_early_allow had code to
workaround that issue but now can be removed and simplify down to only allowing
the sequence having only one MIN/MAX if the outer code is MIN/MAX also.
Bootstrapped and tested on x86_64-linux-gnu.
gcc/ChangeLog:
* tree-ssa-phiopt.cc (phiopt_early_allow): Only allow a sequence
with one statement for MIN/MAX and the op was MIN/MAX.
Signed-off-by: Andrew Pinski <[email protected]>
---
gcc/tree-ssa-phiopt.cc | 16 ++--------------
1 file changed, 2 insertions(+), 14 deletions(-)
diff --git a/gcc/tree-ssa-phiopt.cc b/gcc/tree-ssa-phiopt.cc
index e27166c55a5..54ecd93495a 100644
--- a/gcc/tree-ssa-phiopt.cc
+++ b/gcc/tree-ssa-phiopt.cc
@@ -549,8 +549,7 @@ phiopt_early_allow (gimple_seq &seq, gimple_match_op &op)
tree_code code = (tree_code)op.code;
/* For non-empty sequence, only allow one statement
- except for MIN/MAX, allow max 2 statements,
- each with MIN/MAX. */
+ a MIN/MAX and an original MIN/MAX. */
if (!gimple_seq_empty_p (seq))
{
if (code == MIN_EXPR || code == MAX_EXPR)
@@ -565,18 +564,7 @@ phiopt_early_allow (gimple_seq &seq, gimple_match_op &op)
code = gimple_assign_rhs_code (stmt);
return code == MIN_EXPR || code == MAX_EXPR;
}
- /* Check to make sure op was already a SSA_NAME. */
- if (code != SSA_NAME)
- return false;
- if (!gimple_seq_singleton_p (seq))
- return false;
- gimple *stmt = gimple_seq_first_stmt (seq);
- /* Only allow assignments. */
- if (!is_gimple_assign (stmt))
- return false;
- if (gimple_assign_lhs (stmt) != op.ops[0])
- return false;
- code = gimple_assign_rhs_code (stmt);
+ return false;
}
switch (code)
--
2.43.0
