[gcc r13-2726] Adjust issue_rate for latest Intel processors.

[hongtao Liu <liuhongt@gcc.gnu.org>]

https://gcc.gnu.org/g:041812f584a1c82f1255bd96f3503493bd9fb127

commit r13-2726-g041812f584a1c82f1255bd96f3503493bd9fb127
Author: liuhongt <hongtao.liu@intel.com>
Date:   Tue Sep 6 11:04:40 2022 +0800

    Adjust issue_rate for latest Intel processors.
    
    For Skylake based processor, decoder is 4-way.
    For Sunny Cove and Willow Cove, decoder is 5-way.
    For Golden cove, decoder is 6-way.
    
    gcc/ChangeLog:
    
            * config/i386/x86-tune-sched.cc (ix86_issue_rate): Adjust for
            latest Intel processors.

Diff:
---
 gcc/config/i386/x86-tune-sched.cc | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/gcc/config/i386/x86-tune-sched.cc b/gcc/config/i386/x86-tune-sched.cc
index 1ffaeef037c..e2765f81902 100644
--- a/gcc/config/i386/x86-tune-sched.cc
+++ b/gcc/config/i386/x86-tune-sched.cc
@@ -73,10 +73,24 @@ ix86_issue_rate (void)
     case PROCESSOR_SANDYBRIDGE:
     case PROCESSOR_HASWELL:
     case PROCESSOR_TREMONT:
+    case PROCESSOR_SKYLAKE:
+    case PROCESSOR_SKYLAKE_AVX512:
+    case PROCESSOR_CASCADELAKE:
+    case PROCESSOR_CANNONLAKE:
     case PROCESSOR_ALDERLAKE:
     case PROCESSOR_GENERIC:
       return 4;
 
+    case PROCESSOR_ICELAKE_CLIENT:
+    case PROCESSOR_ICELAKE_SERVER:
+    case PROCESSOR_TIGERLAKE:
+    case PROCESSOR_COOPERLAKE:
+    case PROCESSOR_ROCKETLAKE:
+      return 5;
+
+    case PROCESSOR_SAPPHIRERAPIDS:
+      return 6;
+
     default:
       return 1;
     }