From: Juzhe-Zhong <juzhe.zhong@rivai.ai>
Date: Fri, 15 Sep 2023 09:16:36 +0000 (+0800)
Subject: test: Isolate slp-1.c check of target supports vect_strided5
X-Git-Tag: basepoints/gcc-15~6123
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0854ebea63f59eb678ebf4440afe1d18ed5bb6d4;p=thirdparty%2Fgcc.git

test: Isolate slp-1.c check of target supports vect_strided5

This test failed in RISC-V:
FAIL: gcc.dg/vect/slp-1.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vectorizing stmts using SLP" 4
FAIL: gcc.dg/vect/slp-1.c scan-tree-dump-times vect "vectorizing stmts using SLP" 4

Because this loop:
  /* SLP with unrolling by 8.  */
  for (i = 0; i < N; i++)
    {
      out[i*5] = 8;
      out[i*5 + 1] = 7;
      out[i*5 + 2] = 81;
      out[i*5 + 3] = 28;
      out[i*5 + 4] = 18;
    }

is using vect_load_lanes with array size = 5.
instead of SLP.

When we adjust the COST of LANES load store, then it will use SLP.

gcc/testsuite/ChangeLog:

	* gcc.dg/vect/slp-1.c: Add vect_stried5.
---

diff --git a/gcc/testsuite/gcc.dg/vect/slp-1.c b/gcc/testsuite/gcc.dg/vect/slp-1.c
index 82e4f6469fb9..d4a13f12df66 100644
--- a/gcc/testsuite/gcc.dg/vect/slp-1.c
+++ b/gcc/testsuite/gcc.dg/vect/slp-1.c
@@ -122,5 +122,5 @@ int main (void)
 }
 
 /* { dg-final { scan-tree-dump-times "vectorized 4 loops" 1 "vect"  } } */
-/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 4 "vect" } } */
-  
+/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 4 "vect" { target {! vect_strided5 } } } } */
+/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 3 "vect" { target vect_strided5 } } } */