[clang] [X86] BuiltinsX86.td - move the SSE constexpr builtins together. NFC. (PR #167323)

[Simon Pilgrim via cfe-commits]

https://github.com/RKSimon created https://github.com/llvm/llvm-project/pull/167323

Makes it much easier to workout what still needs to be converted to be constexpr compatible

>From d7c39d7d672569b0ac5c53b8c6770f2fc49ba6ad Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev at redking.me.uk>
Date: Mon, 10 Nov 2025 14:42:35 +0000
Subject: [PATCH] [X86] BuiltinsX86.td - move the SSE constexpr builtins
 together. NFC.

Makes it much easier to workout what still needs to be converted to be constexpr compatible
---
 clang/include/clang/Basic/BuiltinsX86.td | 52 +++++++++++-------------
 1 file changed, 24 insertions(+), 28 deletions(-)

diff --git a/clang/include/clang/Basic/BuiltinsX86.td b/clang/include/clang/Basic/BuiltinsX86.td
index edff241a98738..cd5f2c3012712 100644
--- a/clang/include/clang/Basic/BuiltinsX86.td
+++ b/clang/include/clang/Basic/BuiltinsX86.td
@@ -93,22 +93,6 @@ let Attributes = [Const, NoThrow, RequiredVectorWidth<128>] in {
   }
 
 
-  let Features = "sse2", Attributes = [NoThrow, Const, Constexpr, RequiredVectorWidth<128>] in {
-    def pavgb128 : X86Builtin<"_Vector<16, unsigned char>(_Vector<16, unsigned char>, _Vector<16, unsigned char>)">;
-    def pavgw128 : X86Builtin<"_Vector<8, unsigned short>(_Vector<8, unsigned short>, _Vector<8, unsigned short>)">;
-    def pmulhw128 : X86Builtin<"_Vector<8, short>(_Vector<8, short>, _Vector<8, short>)">;
-    def pmulhuw128 : X86Builtin<"_Vector<8, unsigned short>(_Vector<8, unsigned short>, _Vector<8, unsigned short>)">;
-    def packsswb128 : X86Builtin<"_Vector<16, char>(_Vector<8, short>, _Vector<8, short>)">;
-    def packssdw128 : X86Builtin<"_Vector<8, short>(_Vector<4, int>, _Vector<4, int>)">;
-    def packuswb128 : X86Builtin<"_Vector<16, char>(_Vector<8, short>, _Vector<8, short>)">;
-
-    def vec_ext_v2di : X86Builtin<"long long int(_Vector<2, long long int>, _Constant int)">;
-    def vec_ext_v4si : X86Builtin<"int(_Vector<4, int>, _Constant int)">;
-    def vec_ext_v4sf : X86Builtin<"float(_Vector<4, float>, _Constant int)">;
-    def vec_ext_v8hi : X86Builtin<"short(_Vector<8, short>, _Constant int)">;
-    def vec_set_v8hi : X86Builtin<"_Vector<8, short>(_Vector<8, short>, short, _Constant int)">;
-  }
-
   let Features = "sse3" in {
     foreach Op = ["addsub"] in {
       def Op#ps : X86Builtin<"_Vector<4, float>(_Vector<4, float>, _Vector<4, float>)">;
@@ -219,15 +203,6 @@ let Features = "sse2", Attributes = [NoThrow] in {
   def movnti : X86Builtin<"void(int *, int)">;
 }
 
-let Features = "sse2", Attributes = [NoThrow, Const, Constexpr, RequiredVectorWidth<128>] in {
-  def pshuflw : X86Builtin<"_Vector<8, short>(_Vector<8, short>, _Constant int)">;
-  def pshufd : X86Builtin<"_Vector<4, int>(_Vector<4, int>, _Constant int)">;
-  def pshufhw : X86Builtin<"_Vector<8, short>(_Vector<8, short>, _Constant int)">;
-  def movmskpd : X86Builtin<"int(_Vector<2, double>)">;
-  def pmovmskb128 : X86Builtin<"int(_Vector<16, char>)">;
-  def shufpd : X86Builtin<"_Vector<2, double>(_Vector<2, double>, _Vector<2, double>, _Constant int)">;
-}
-
 let Features = "sse2", Attributes = [NoThrow, Const, RequiredVectorWidth<128>] in {
   def psadbw128 : X86Builtin<"_Vector<2, long long int>(_Vector<16, char>, _Vector<16, char>)">;
   def sqrtpd : X86Builtin<"_Vector<2, double>(_Vector<2, double>)">;
@@ -285,12 +260,27 @@ let Features = "sse2", Attributes = [NoThrow, Const, RequiredVectorWidth<128>] i
   def psllq128 : X86Builtin<"_Vector<2, long long int>(_Vector<2, long long int>, _Vector<2, long long int>)">;
 }
 
-let Features = "sse2",
-    Attributes = [NoThrow, Const, Constexpr, RequiredVectorWidth<128>] in {
+let Features = "sse2", Attributes = [NoThrow, Const, Constexpr, RequiredVectorWidth<128>] in {
+  def movmskpd : X86Builtin<"int(_Vector<2, double>)">;
+  def pmovmskb128 : X86Builtin<"int(_Vector<16, char>)">;
+
+  def pavgb128 : X86Builtin<"_Vector<16, unsigned char>(_Vector<16, unsigned char>, _Vector<16, unsigned char>)">;
+  def pavgw128 : X86Builtin<"_Vector<8, unsigned short>(_Vector<8, unsigned short>, _Vector<8, unsigned short>)">;
+
   def pmaddwd128 : X86Builtin<"_Vector<4, int>(_Vector<8, short>, _Vector<8, short>)">;
-  
+  def pmulhw128 : X86Builtin<"_Vector<8, short>(_Vector<8, short>, _Vector<8, short>)">;
+  def pmulhuw128 : X86Builtin<"_Vector<8, unsigned short>(_Vector<8, unsigned short>, _Vector<8, unsigned short>)">;
   def pmuludq128 : X86Builtin<"_Vector<2, long long int>(_Vector<4, int>, _Vector<4, int>)">;
 
+  def packsswb128 : X86Builtin<"_Vector<16, char>(_Vector<8, short>, _Vector<8, short>)">;
+  def packssdw128 : X86Builtin<"_Vector<8, short>(_Vector<4, int>, _Vector<4, int>)">;
+  def packuswb128 : X86Builtin<"_Vector<16, char>(_Vector<8, short>, _Vector<8, short>)">;
+
+  def pshuflw : X86Builtin<"_Vector<8, short>(_Vector<8, short>, _Constant int)">;
+  def pshufd : X86Builtin<"_Vector<4, int>(_Vector<4, int>, _Constant int)">;
+  def pshufhw : X86Builtin<"_Vector<8, short>(_Vector<8, short>, _Constant int)">;
+  def shufpd : X86Builtin<"_Vector<2, double>(_Vector<2, double>, _Vector<2, double>, _Constant int)">;
+
   def psllwi128 : X86Builtin<"_Vector<8, short>(_Vector<8, short>, int)">;
   def pslldi128 : X86Builtin<"_Vector<4, int>(_Vector<4, int>, int)">;
   def psllqi128 : X86Builtin<"_Vector<2, long long int>(_Vector<2, long long int>, int)">;
@@ -304,6 +294,12 @@ let Features = "sse2",
 
   def pslldqi128_byteshift : X86Builtin<"_Vector<16, char>(_Vector<16, char>, _Constant int)">;
   def psrldqi128_byteshift : X86Builtin<"_Vector<16, char>(_Vector<16, char>, _Constant int)">;
+
+  def vec_ext_v2di : X86Builtin<"long long int(_Vector<2, long long int>, _Constant int)">;
+  def vec_ext_v4si : X86Builtin<"int(_Vector<4, int>, _Constant int)">;
+  def vec_ext_v4sf : X86Builtin<"float(_Vector<4, float>, _Constant int)">;
+  def vec_ext_v8hi : X86Builtin<"short(_Vector<8, short>, _Constant int)">;
+  def vec_set_v8hi : X86Builtin<"_Vector<8, short>(_Vector<8, short>, short, _Constant int)">;
 }
 
 let Features = "sse3", Attributes = [NoThrow] in {