From 2987ca61003ee7d55b8b005ab4c9c679efc9558b Mon Sep 17 00:00:00 2001
From: Pan Li <pan2.li@intel.com>
Date: Mon, 14 Oct 2024 10:09:31 +0800
Subject: [PATCH] Vect: Try the pattern of vector signed integer SAT_TRUNC
Almost the same as vector unsigned integer SAT_TRUNC, try to match
the signed version during the vector pattern matching.
The below test suites are passed for this patch.
* The rv64gcv fully regression test.
* The x86 bootstrap test.
* The x86 fully regression test.
gcc/ChangeLog:
* tree-vect-patterns.cc (gimple_signed_integer_sat_trunc): Add
new func decl for signed SAT_TRUNC.
(vect_recog_sat_trunc_pattern): Try signed match pattern for
the SAT_TRUNC.
Signed-off-by: Pan Li <pan2.li@intel.com>
---
gcc/tree-vect-patterns.cc | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/tree-vect-patterns.cc b/gcc/tree-vect-patterns.cc
index 746f100a0842..ce5a528141f7 100644
--- a/gcc/tree-vect-patterns.cc
+++ b/gcc/tree-vect-patterns.cc
@@ -4539,6 +4539,7 @@ extern bool gimple_unsigned_integer_sat_trunc (tree, tree*, tree (*)(tree));
extern bool gimple_signed_integer_sat_add (tree, tree*, tree (*)(tree));
extern bool gimple_signed_integer_sat_sub (tree, tree*, tree (*)(tree));
+extern bool gimple_signed_integer_sat_trunc (tree, tree*, tree (*)(tree));
static gimple *
vect_recog_build_binary_gimple_stmt (vec_info *vinfo, stmt_vec_info stmt_info,
@@ -4770,7 +4771,8 @@ vect_recog_sat_trunc_pattern (vec_info *vinfo, stmt_vec_info stmt_vinfo,
tree lhs = gimple_assign_lhs (last_stmt);
tree otype = TREE_TYPE (lhs);
- if (gimple_unsigned_integer_sat_trunc (lhs, ops, NULL)
+ if ((gimple_unsigned_integer_sat_trunc (lhs, ops, NULL)
+ || gimple_signed_integer_sat_trunc (lhs, ops, NULL))
&& type_has_mode_precision_p (otype))
{
tree itype = TREE_TYPE (ops[0]);
--
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