[clang] [Headers][X86] Enable constexpr handling for MMX/SSE/AVX/AVX512 PMADDWD/PMADDUBSW intrinsics (PR #161563)

[Bhasawut Singhaphan via cfe-commits]

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@@ -3364,6 +3425,16 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC, const CallExpr *Call,
     return interp__builtin_elementwise_int_binop(S, OpPC, Call,
                                                  llvm::APIntOps::avgCeilU);
 
+  case clang::X86::BI__builtin_ia32_pmaddubsw128:
+  case clang::X86::BI__builtin_ia32_pmaddubsw256:
+  case clang::X86::BI__builtin_ia32_pmaddubsw512:
+    return interp__builtin_ia32_pmadd(S, OpPC, Call, BuiltinID);
+
+  case clang::X86::BI__builtin_ia32_pmaddwd128:
+  case clang::X86::BI__builtin_ia32_pmaddwd256:
+  case clang::X86::BI__builtin_ia32_pmaddwd512:
+    return interp__builtin_ia32_pmadd(S, OpPC, Call, BuiltinID);
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markbhasawut wrote:

Done.

https://github.com/llvm/llvm-project/pull/161563