[clang] [llvm] [PowerPC][X86] Make cpu id builtins target independent and lower for PPC (PR #68919)

[Amy Kwan via cfe-commits]

================
@@ -15,38 +20,57 @@ int main(void) {
   if (__builtin_cpu_supports("sse4.2"))
     a("sse4.2");
 
-  // CHECK: [[LOAD:%[^ ]+]] = load i32, ptr getelementptr inbounds ({ i32, 
i32, i32, [1 x i32] }, ptr @__cpu_model, i32 0, i32 3, i32 0)
-  // CHECK: [[AND:%[^ ]+]] = and i32 [[LOAD]], 256
-  // CHECK: = icmp eq i32 [[AND]], 256
+  // CHECK-X86: [[LOAD:%[^ ]+]] = load i32, ptr getelementptr inbounds ({ i32, 
i32, i32, [1 x i32] }, ptr @__cpu_model, i32 0, i32 3, i32 0)
+  // CHECK-X86: [[AND:%[^ ]+]] = and i32 [[LOAD]], 256
+  // CHECK-X86: = icmp eq i32 [[AND]], 256
 
   if (__builtin_cpu_supports("gfni"))
     a("gfni");
 
-  // CHECK: [[LOAD:%[^ ]+]] = load i32, ptr @__cpu_features2
-  // CHECK: [[AND:%[^ ]+]] = and i32 [[LOAD]], 1
-  // CHECK: = icmp eq i32 [[AND]], 1
+  // CHECK-X86: [[LOAD:%[^ ]+]] = load i32, ptr @__cpu_features2
+  // CHECK-X86: [[AND:%[^ ]+]] = and i32 [[LOAD]], 1
+  // CHECK-X86: = icmp eq i32 [[AND]], 1
 
   return 0;
 }
 
-// CHECK: declare dso_local void @__cpu_indicator_init()
+// CHECK-X86: declare dso_local void @__cpu_indicator_init()
 
-// CHECK-LABEL: define{{.*}} @baseline(
-// CHECK:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds ([[[#]] 
x i32], ptr @__cpu_features2, i32 0, i32 1)
-// CHECK-NEXT:    and i32 [[LOAD]], -2147483648
+// CHECK-X86-LABEL: define{{.*}} @baseline(
+// CHECK-X86:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds 
([[[#]] x i32], ptr @__cpu_features2, i32 0, i32 1)
+// CHECK-X86-NEXT:    and i32 [[LOAD]], -2147483648
 int baseline() { return __builtin_cpu_supports("x86-64"); }
 
-// CHECK-LABEL: define{{.*}} @v2(
-// CHECK:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds ([[[#]] 
x i32], ptr @__cpu_features2, i32 0, i32 2)
-// CHECK-NEXT:    and i32 [[LOAD]], 1
+// CHECK-X86-LABEL: define{{.*}} @v2(
+// CHECK-X86:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds 
([[[#]] x i32], ptr @__cpu_features2, i32 0, i32 2)
+// CHECK-X86-NEXT:    and i32 [[LOAD]], 1
 int v2() { return __builtin_cpu_supports("x86-64-v2"); }
 
-// CHECK-LABEL: define{{.*}} @v3(
-// CHECK:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds ([[[#]] 
x i32], ptr @__cpu_features2, i32 0, i32 2)
-// CHECK-NEXT:    and i32 [[LOAD]], 2
+// CHECK-X86-LABEL: define{{.*}} @v3(
+// CHECK-X86:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds 
([[[#]] x i32], ptr @__cpu_features2, i32 0, i32 2)
+// CHECK-X86-NEXT:    and i32 [[LOAD]], 2
 int v3() { return __builtin_cpu_supports("x86-64-v3"); }
 
-// CHECK-LABEL: define{{.*}} @v4(
-// CHECK:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds ([[[#]] 
x i32], ptr @__cpu_features2, i32 0, i32 2)
-// CHECK-NEXT:    and i32 [[LOAD]], 4
+// CHECK-X86-LABEL: define{{.*}} @v4(
+// CHECK-X86:         [[LOAD:%.*]] = load i32, ptr getelementptr inbounds 
([[[#]] x i32], ptr @__cpu_features2, i32 0, i32 2)
+// CHECK-X86-NEXT:    and i32 [[LOAD]], 4
 int v4() { return __builtin_cpu_supports("x86-64-v4"); }
+#else
+int test(int a) {
----------------
amy-kwan wrote:

Minor nit: Can we add a `CHECK-LABEL` as well? So that we know that we're 
actually inside `test`.

https://github.com/llvm/llvm-project/pull/68919
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