[SveEmitter] Add builtins for SVE2 saturating shift left and addition

This patch adds builtins for:
- svqrshl
- svqshl
- svsqadd
- svuqadd

clang/include/clang/Basic/arm_sve.td

@@ -1274,6 +1274,28 @@ defm SVRECPE  : SInstZPZ<"svrecpe",  "Ui",   "aarch64_sve_urecpe">;
 defm SVRSQRTE : SInstZPZ<"svrsqrte", "Ui",   "aarch64_sve_ursqrte">;
 }
 
+//------------------------------------------------------------------------------
+
+multiclass SInstZPZxZ<string name, string types, string pat_v, string pat_n, string intrinsic, list<FlagType> flags=[]> {
+  def _M   : SInst<name # "[_{d}]", pat_v, types, MergeOp1,  intrinsic, flags>;
+  def _X   : SInst<name # "[_{d}]", pat_v, types, MergeAny,  intrinsic, flags>;
+  def _Z   : SInst<name # "[_{d}]", pat_v, types, MergeZero, intrinsic, flags>;
+
+  def _N_M : SInst<name # "[_n_{d}]", pat_n, types, MergeOp1,  intrinsic, flags>;
+  def _N_X : SInst<name # "[_n_{d}]", pat_n, types, MergeAny,  intrinsic, flags>;
+  def _N_Z : SInst<name # "[_n_{d}]", pat_n, types, MergeZero, intrinsic, flags>;
+}
+
+let ArchGuard = "defined(__ARM_FEATURE_SVE2)" in {
+defm SVQRSHL_S : SInstZPZxZ<"svqrshl", "csil",     "dPdx", "dPdK", "aarch64_sve_sqrshl">;
+defm SVQRSHL_U : SInstZPZxZ<"svqrshl", "UcUsUiUl", "dPdx", "dPdK", "aarch64_sve_uqrshl">;
+defm SVQSHL_S  : SInstZPZxZ<"svqshl",  "csil",     "dPdx", "dPdK", "aarch64_sve_sqshl">;
+defm SVQSHL_U  : SInstZPZxZ<"svqshl",  "UcUsUiUl", "dPdx", "dPdK", "aarch64_sve_uqshl">;
+defm SVRSHL_S  : SInstZPZxZ<"svrshl",  "csil",     "dPdx", "dPdK", "aarch64_sve_srshl">;
+defm SVRSHL_U  : SInstZPZxZ<"svrshl",  "UcUsUiUl", "dPdx", "dPdK", "aarch64_sve_urshl">;
+defm SVSQADD   : SInstZPZxZ<"svsqadd", "UcUsUiUl", "dPdx", "dPdK", "aarch64_sve_usqadd">;
+defm SVUQADD   : SInstZPZxZ<"svuqadd", "csil",     "dPdu", "dPdL", "aarch64_sve_suqadd">;
+}
 ////////////////////////////////////////////////////////////////////////////////
 // SVE2 - Non-temporal gather/scatter
 let ArchGuard = "defined(__ARM_FEATURE_SVE2)" in {