From cb60334b7162ec5ae560be482cd7a33402470bb4 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Fri, 15 Jan 2021 13:31:28 +0100 Subject: [PATCH] testsuite/96098 - remove redundant testcase The testcase morphed in a way no longer testing what it was originally supposed to do and slightly altering it shows the original issue isn't fixed (anymore). The limit as set as result of PR91403 (and dups) prevents the issue for larger arrays but the testcase has double a[128][128]; which results in a group size of "just" 512 (the limit is 4096). Avoiding the 'BB vectorization with gaps at the end of a load is not supported' by altering it to do void foo(void) { b[0] = a[0][0]; b[1] = a[1][0]; b[2] = a[2][0]; b[3] = a[3][127]; } shows that costing has improved further to not account the dead loads making the previous test inefficient. In fact the underlying issue isn't fixed (we do code-generate dead loads). In fact the vector permute load is even profitable, just the excessive code-generation issue exists (and is "fixed" by capping it a constant boundary, just too high for this particular testcase). The testcase now has "dups", so I'll simply remove it. 2021-01-15 Richard Biener PR testsuite/96098 * gcc.dg/vect/bb-slp-pr68892.c: Remove. --- gcc/testsuite/gcc.dg/vect/bb-slp-pr68892.c | 20 -------------------- 1 file changed, 20 deletions(-) delete mode 100644 gcc/testsuite/gcc.dg/vect/bb-slp-pr68892.c diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-pr68892.c b/gcc/testsuite/gcc.dg/vect/bb-slp-pr68892.c deleted file mode 100644 index e9909cf0dfa..00000000000 --- a/gcc/testsuite/gcc.dg/vect/bb-slp-pr68892.c +++ /dev/null @@ -1,20 +0,0 @@ -/* { dg-do compile } */ -/* { dg-additional-options "-fvect-cost-model=dynamic" } */ -/* { dg-require-effective-target vect_double } */ - -double a[128][128]; -double b[128]; - -void foo(void) -{ - b[0] = a[0][0]; - b[1] = a[1][0]; - b[2] = a[2][0]; - b[3] = a[3][0]; -} - -/* ??? Due to the gaps we fall back to scalar loads which makes the - vectorization profitable. */ -/* { dg-final { scan-tree-dump "not profitable" "slp2" { xfail { ! aarch64*-*-* } } } } */ -/* { dg-final { scan-tree-dump "BB vectorization with gaps at the end of a load is not supported" "slp2" } } */ -/* { dg-final { scan-tree-dump-times "Basic block will be vectorized" 1 "slp2" { xfail aarch64*-*-* } } } */ -- 2.30.2