[PATCH] Make sure SCALAR_INT_MODE_P before invoke try_const_anchors

[Jiufu Guo <guojiufu@linux.ibm.com>]

Hi,

As checking the code, there is a "gcc_assert (SCALAR_INT_MODE_P (mode))"
in "try_const_anchors".
This assert seems correct because the function try_const_anchors cares
about integer values currently, and modes other than SCALAR_INT_MODE_P
are not needed to support.

This patch makes sure SCALAR_INT_MODE_P when calling try_const_anchors.

This patch is raised when drafting below one.
https://gcc.gnu.org/pipermail/gcc-patches/2022-October/603530.html.
With that patch, "{[%1:DI]=0;} stack_tie" with BLKmode runs into
try_const_anchors, and hits the assert/ice.

Boostrap and regtest pass on ppc64{,le} and x86_64.
Is this ok for trunk?


BR,
Jeff (Jiufu Guo)

gcc/ChangeLog:

	* cse.cc (cse_insn): Add SCALAR_INT_MODE_P condition.

---
 gcc/cse.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/cse.cc b/gcc/cse.cc
index 2bb63ac4105..f213fa0faf7 100644
*** a/gcc/cse.cc
--- b/gcc/cse.cc
***************
*** 5003,5009 ****
        if (targetm.const_anchor
  	  && !src_related
  	  && src_const
! 	  && GET_CODE (src_const) == CONST_INT)
  	{
  	  src_related = try_const_anchors (src_const, mode);
  	  src_related_is_const_anchor = src_related != NULL_RTX;
- - 
--- 5003,5010 ----
        if (targetm.const_anchor
  	  && !src_related
  	  && src_const
! 	  && GET_CODE (src_const) == CONST_INT
! 	  && SCALAR_INT_MODE_P (mode))
  	{
  	  src_related = try_const_anchors (src_const, mode);
  	  src_related_is_const_anchor = src_related != NULL_RTX;
2.39.3