Thanks for your suggestion!But I met the issue that if I declare a int type 
variable,this variable can't be converted to vector type. Could you teach me 
more detail?

Best regards!
Yixuan Chen  

"Richard Biener" <richard.guent...@gmail.com>wrote:
> On Mon, Mar 27, 2023 at 12:37 PM <chenyix...@iscas.ac.cn> wrote:
> >
> > From: Yixuan Chen <chenyix...@iscas.ac.cn>
> >
> > Observed a vint type "ABS_EXPR" followed by extra 3 int type "ABS_EXPR". If 
> > want to test absolute value optimization for vector, maybe don't need 4 
> > times.
> 
> A better solution would be to scan a dump before the veclower pass?
> 
> > gcc/testsuite/ChangeLog:
> >
> > 2023-03-27  Yixuan Chen  <chenyix...@iscas.ac.cn>
> >
> >         * g++.dg/pr94920.C: Declare the vector size as long as int.
> >
> > ---
> >  gcc/testsuite/g++.dg/pr94920.C | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/gcc/testsuite/g++.dg/pr94920.C b/gcc/testsuite/g++.dg/pr94920.C
> > index 126b00478d2..498bef93b3a 100644
> > --- a/gcc/testsuite/g++.dg/pr94920.C
> > +++ b/gcc/testsuite/g++.dg/pr94920.C
> > @@ -2,7 +2,7 @@
> >  /* { dg-do compile } */
> >  /* { dg-options "-O2 -Wno-psabi -fdump-tree-optimized" } */
> >
> > -typedef int __attribute__((vector_size(4*sizeof(int)))) vint;
> > +typedef int __attribute__((vector_size(sizeof(int)))) vint;
> >
> >  /* Same form as PR.  */
> >  __attribute__((noipa)) unsigned int foo(int x) {
> > --
> > 2.40.0
> >

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