[PowerPC] Add range check for vec_genpcvm builtins

[quinnp]

Summary

This patch adds range checking for some Power10 altivec builtins. Range
checking is done in SemaChecking.

[Conanap]

lgtm

[lei]

LGTM.
Thx!

[quinnp]

Rebased with main.

clang/lib/Sema/SemaChecking.cpp

bool Sema::CheckPPCBuiltinFunctionCall(const TargetInfo &TI, unsigned BuiltinID,
   case PPC::BI__builtin_altivec_vcntmbw:
   case PPC::BI__builtin_altivec_vcntmbd:
     return SemaBuiltinConstantArgRange(TheCall, 1, 0, 1);
   case PPC::BI__builtin_darn:
   case PPC::BI__builtin_darn_raw:
   case PPC::BI__builtin_darn_32:
     return SemaFeatureCheck(*this, TheCall, "isa-v30-instructions",
                             diag::err_ppc_builtin_only_on_arch, "9");
+  case PPC::BI__builtin_vsx_xxgenpcvbm:
+  case PPC::BI__builtin_vsx_xxgenpcvhm:
+  case PPC::BI__builtin_vsx_xxgenpcvwm:
+  case PPC::BI__builtin_vsx_xxgenpcvdm:
+    return SemaBuiltinConstantArgRange(TheCall, 1, 0, 3);
 #define CUSTOM_BUILTIN(Name, Intr, Types, Acc) \
   case PPC::BI__builtin_##Name: \
     return SemaBuiltinPPCMMACall(TheCall, Types);
 #include "clang/Basic/BuiltinsPPC.def"
   }
   return SemaBuiltinConstantArgRange(TheCall, i, l, u);
 }
 

clang/test/CodeGen/builtins-ppc-p10vector-error.c

 
 unsigned long long test_vec_cntm_ui(void) {
   return vec_cntm(vuia, 2); // expected-error 1+ {{argument value 2 is outside the valid range [0, 1]}}
 }
 
 unsigned long long test_vec_cntm_ull(void) {
   return vec_cntm(vulla, 2); // expected-error 1+ {{argument value 2 is outside the valid range [0, 1]}}
 }
+
+vector unsigned char test_xxgenpcvbm(void) {
+  return vec_genpcvm(vuca, -1); // expected-error 1+ {{argument value -1 is outside the valid range [0, 3]}}
+}
+
+vector unsigned short test_xxgenpcvhm(void) {
+  return vec_genpcvm(vusa, -1); // expected-error 1+ {{argument value -1 is outside the valid range [0, 3]}}
+}
+
+vector unsigned int test_xxgenpcvwm(void) {
+  return vec_genpcvm(vuia, 4); // expected-error 1+ {{argument value 4 is outside the valid range [0, 3]}}
+}
+
+vector unsigned long long test_xxgenpcvdm(void) {
+  return vec_genpcvm(vulla, 4); // expected-error 1+ {{argument value 4 is outside the valid range [0, 3]}}
+}