[clang] [Clang] VectorExprEvaluator::VisitCallExpr / InterpretBuiltin - allow MMX/SSE/AVX2 PSIGN intrinsics to be used in constexpr (PR #163685)

[Simon Pilgrim via cfe-commits]

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@@ -3630,6 +3659,14 @@ bool InterpretBuiltin(InterpState &S, CodePtr OpPC, const CallExpr *Call,
               .extractBits(16, 1);
         });
 
+  case X86::BI__builtin_ia32_psignb128:
+  case X86::BI__builtin_ia32_psignb256:
+  case X86::BI__builtin_ia32_psignw128:
+  case X86::BI__builtin_ia32_psignw256:
+  case X86::BI__builtin_ia32_psignd128:
+  case X86::BI__builtin_ia32_psignd256:
+    return interp__builtin_ia32_psign_op(S, OpPC, Call);
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RKSimon wrote:

use interp__builtin_elementwise_int_binop with a callback instead?

https://github.com/llvm/llvm-project/pull/163685