i386: Call get_available_features for all CPUs with max_level >= 1 [PR100758]

get_available_features doesn't depend on cpu_model2->__cpu_{family,model}
and just sets stuff up based on CPUID leaf 1, or some extended ones,
so I wonder why are we calling it separately for Intel, AMD and Zhaoxin
and not for all other CPUs too?  I think various programs in the wild
which aren't using __builtin_cpu_{is,supports} just check the various CPUID
leafs and query bits in there, without blacklisting unknown CPU vendors,
so I think even __builtin_cpu_supports ("sse2") etc. should be reliable
if those VENDOR_{CENTAUR,CYRIX,NSC,OTHER} CPUs set those bits in CPUID leaf
1 or some extended ones.  Calling it for all CPUs also means it can be
inlined because there will be just a single caller.

I have tested it on Intel and Martin tested it on AMD, but can't test it
on non-Intel/AMD; for Intel/AMD/Zhaoxin it should be really no change in
behavior.

2023-02-09  Jakub Jelinek  <jakub@redhat.com>

	PR target/100758
	* common/config/i386/cpuinfo.h (cpu_indicator_init): Call
	get_available_features for all CPUs with max_level >= 1, rather
	than just Intel or AMD.

(cherry picked from commit b24e9c083093a9e1b1007933a184c02f7ff058db)

diff --git a/gcc/common/config/i386/cpuinfo.h b/gcc/common/config/i386/cpuinfo.h
index 388f479840637cac34c1ccd318d47486b58a5c16..0333da56ba50575d0fc9c84afdd059e7abd16f37 100644 (file)
--- a/gcc/common/config/i386/cpuinfo.h
+++ b/gcc/common/config/i386/cpuinfo.h
@@ -910,6 +910,10 @@ cpu_indicator_init (struct __processor_model *cpu_model,
   extended_model = (eax >> 12) & 0xf0;
   extended_family = (eax >> 20) & 0xff;
 
+  /* Find available features. */
+  get_available_features (cpu_model, cpu_model2, cpu_features2,
+                         ecx, edx);
+
   if (vendor == signature_INTEL_ebx)
     {
       /* Adjust model and family for Intel CPUS. */
@@ -924,9 +928,6 @@ cpu_indicator_init (struct __processor_model *cpu_model,
       cpu_model2->__cpu_family = family;
       cpu_model2->__cpu_model = model;
 
-      /* Find available features. */
-      get_available_features (cpu_model, cpu_model2, cpu_features2,
-                             ecx, edx);
       /* Get CPU type.  */
       get_intel_cpu (cpu_model, cpu_model2, cpu_features2);
       cpu_model->__cpu_vendor = VENDOR_INTEL;
@@ -943,9 +944,6 @@ cpu_indicator_init (struct __processor_model *cpu_model,
       cpu_model2->__cpu_family = family;
       cpu_model2->__cpu_model = model;
 
-      /* Find available features. */
-      get_available_features (cpu_model, cpu_model2, cpu_features2,
-                             ecx, edx);
       /* Get CPU type.  */
       get_amd_cpu (cpu_model, cpu_model2, cpu_features2);
       cpu_model->__cpu_vendor = VENDOR_AMD;