[clang] [llvm] [X86] Remove CLDEMOTE from Alderlake and later hybrid processors (PR #144662)

[Phoebe Wang via llvm-commits]

https://github.com/phoebewang created https://github.com/llvm/llvm-project/pull/144662

SDM doesn't list any hybrid processors in this feature. Besides, physical machine also reports not supported.

>From 353fbfc93faa2c1bad26261b566d3f797b6d1a72 Mon Sep 17 00:00:00 2001
From: "Wang, Phoebe" <phoebe.wang at intel.com>
Date: Wed, 18 Jun 2025 16:04:22 +0800
Subject: [PATCH] [X86] Remove CLDEMOTE from Alderlake and later hybrid
 processors

SDM doesn't list any hybrid processors in this feature. Besides,
physical machine also reports not supported.
---
 clang/test/Preprocessor/predefined-arch-macros.c | 4 ++--
 llvm/lib/Target/X86/X86.td                       | 2 +-
 llvm/lib/TargetParser/X86TargetParser.cpp        | 6 +++---
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/clang/test/Preprocessor/predefined-arch-macros.c b/clang/test/Preprocessor/predefined-arch-macros.c
index 2d17891071aae..9dfeddbd4d5ac 100644
--- a/clang/test/Preprocessor/predefined-arch-macros.c
+++ b/clang/test/Preprocessor/predefined-arch-macros.c
@@ -2102,7 +2102,7 @@
 // CHECK_ADL_M32: #define __AVX__ 1
 // CHECK_ADL_M32: #define __BMI2__ 1
 // CHECK_ADL_M32: #define __BMI__ 1
-// CHECK_ADL_M32: #define __CLDEMOTE__ 1
+// CHECK_ADL_M32-NOT: #define __CLDEMOTE__ 1
 // CHECK_ADL_M32: #define __CLFLUSHOPT__ 1
 // CHECK_ADL_M32: #define __CLWB__ 1
 // CHECK_ADL_M32: #define __F16C__ 1
@@ -2173,7 +2173,7 @@
 // CHECK_ADL_M64: #define __AVX__ 1
 // CHECK_ADL_M64: #define __BMI2__ 1
 // CHECK_ADL_M64: #define __BMI__ 1
-// CHECK_ADL_M64: #define __CLDEMOTE__ 1
+// CHECK_ADL_M64-NOT: #define __CLDEMOTE__ 1
 // CHECK_ADL_M64: #define __CLFLUSHOPT__ 1
 // CHECK_ADL_M64: #define __CLWB__ 1
 // CHECK_ADL_M64: #define __F16C__ 1
diff --git a/llvm/lib/Target/X86/X86.td b/llvm/lib/Target/X86/X86.td
index 2d635835e3ff7..b09891652ad99 100644
--- a/llvm/lib/Target/X86/X86.td
+++ b/llvm/lib/Target/X86/X86.td
@@ -1284,7 +1284,6 @@ def ProcessorFeatures {
                                                   FeatureAVXVNNI,
                                                   FeaturePKU,
                                                   FeatureHRESET,
-                                                  FeatureCLDEMOTE,
                                                   FeatureMOVDIRI,
                                                   FeatureMOVDIR64B,
                                                   FeatureWAITPKG];
@@ -1311,6 +1310,7 @@ def ProcessorFeatures {
                                                   FeatureAVXNECONVERT,
                                                   FeatureENQCMD,
                                                   FeatureUINTR,
+                                                  FeatureCLDEMOTE,
                                                   FeatureAVXVNNIINT8];
   list<SubtargetFeature> SRFFeatures =
     !listconcat(ADLFeatures, SRFAdditionalFeatures);
diff --git a/llvm/lib/TargetParser/X86TargetParser.cpp b/llvm/lib/TargetParser/X86TargetParser.cpp
index 21d05ee389e64..4947b05cd0370 100644
--- a/llvm/lib/TargetParser/X86TargetParser.cpp
+++ b/llvm/lib/TargetParser/X86TargetParser.cpp
@@ -165,11 +165,11 @@ constexpr FeatureBitset FeaturesAlderlake =
     FeaturesTremont | FeatureADX | FeatureBMI | FeatureBMI2 | FeatureF16C |
     FeatureFMA | FeatureINVPCID | FeatureLZCNT | FeaturePCONFIG | FeaturePKU |
     FeatureSERIALIZE | FeatureSHSTK | FeatureVAES | FeatureVPCLMULQDQ |
-    FeatureCLDEMOTE | FeatureMOVDIR64B | FeatureMOVDIRI | FeatureWAITPKG |
-    FeatureAVXVNNI | FeatureHRESET | FeatureWIDEKL;
+    FeatureMOVDIR64B | FeatureMOVDIRI | FeatureWAITPKG | FeatureAVXVNNI |
+    FeatureHRESET | FeatureWIDEKL;
 constexpr FeatureBitset FeaturesSierraforest =
     FeaturesAlderlake | FeatureCMPCCXADD | FeatureAVXIFMA | FeatureUINTR |
-    FeatureENQCMD | FeatureAVXNECONVERT | FeatureAVXVNNIINT8;
+    FeatureCLDEMOTE | FeatureENQCMD | FeatureAVXNECONVERT | FeatureAVXVNNIINT8;
 constexpr FeatureBitset FeaturesArrowlakeS = FeaturesSierraforest |
     FeatureAVXVNNIINT16 | FeatureSHA512 | FeatureSM3 | FeatureSM4;
 constexpr FeatureBitset FeaturesPantherlake =