diff --git a/clang/test/Preprocessor/predefined-arch-macros.c b/clang/test/Preprocessor/predefined-arch-macros.c
--- a/clang/test/Preprocessor/predefined-arch-macros.c
+++ b/clang/test/Preprocessor/predefined-arch-macros.c
@@ -1298,7 +1298,7 @@
 // CHECK_ICL_M32: #define __BMI2__ 1
 // CHECK_ICL_M32: #define __BMI__ 1
 // CHECK_ICL_M32: #define __CLFLUSHOPT__ 1
-// CHECK_ICL_M32: #define __CLWB__ 1
+// CHECK_ICL_M32-NOT: #define __CLWB__ 1
 // CHECK_ICL_M32: #define __F16C__ 1
 // CHECK_ICL_M32: #define __FMA__ 1
 // CHECK_ICL_M32: #define __GFNI__ 1
@@ -1355,7 +1355,7 @@
 // CHECK_ICL_M64: #define __BMI2__ 1
 // CHECK_ICL_M64: #define __BMI__ 1
 // CHECK_ICL_M64: #define __CLFLUSHOPT__ 1
-// CHECK_ICL_M64: #define __CLWB__ 1
+// CHECK_ICL_M64-NOT: #define __CLWB__ 1
 // CHECK_ICL_M64: #define __F16C__ 1
 // CHECK_ICL_M64: #define __FMA__ 1
 // CHECK_ICL_M64: #define __GFNI__ 1
diff --git a/llvm/lib/Support/X86TargetParser.cpp b/llvm/lib/Support/X86TargetParser.cpp
--- a/llvm/lib/Support/X86TargetParser.cpp
+++ b/llvm/lib/Support/X86TargetParser.cpp
@@ -192,13 +192,13 @@
     FeaturePKU | FeatureSHA;
 constexpr FeatureBitset FeaturesICLClient =
     FeaturesCannonlake | FeatureAVX512BITALG | FeatureAVX512VBMI2 |
-    FeatureAVX512VNNI | FeatureAVX512VPOPCNTDQ | FeatureCLWB | FeatureGFNI |
-    FeatureRDPID | FeatureVAES | FeatureVPCLMULQDQ;
+    FeatureAVX512VNNI | FeatureAVX512VPOPCNTDQ | FeatureGFNI | FeatureRDPID |
+    FeatureVAES | FeatureVPCLMULQDQ;
 constexpr FeatureBitset FeaturesICLServer =
-    FeaturesICLClient | FeaturePCONFIG | FeatureWBNOINVD;
+    FeaturesICLClient | FeatureCLWB | FeaturePCONFIG | FeatureWBNOINVD;
 constexpr FeatureBitset FeaturesTigerlake =
     FeaturesICLClient | FeatureAVX512VP2INTERSECT | FeatureMOVDIR64B |
-    FeatureMOVDIRI | FeatureSHSTK | FeatureKL | FeatureWIDEKL;
+    FeatureCLWB | FeatureMOVDIRI | FeatureSHSTK | FeatureKL | FeatureWIDEKL;
 constexpr FeatureBitset FeaturesSapphireRapids =
     FeaturesICLServer | FeatureAMX_TILE | FeatureAMX_INT8 | FeatureAMX_BF16 |
     FeatureAVX512BF16 | FeatureAVX512VP2INTERSECT | FeatureCLDEMOTE |
diff --git a/llvm/lib/Target/X86/X86.td b/llvm/lib/Target/X86/X86.td
--- a/llvm/lib/Target/X86/X86.td
+++ b/llvm/lib/Target/X86/X86.td
@@ -740,7 +740,6 @@
                                                   FeatureVPCLMULQDQ,
                                                   FeatureVPOPCNTDQ,
                                                   FeatureGFNI,
-                                                  FeatureCLWB,
                                                   FeatureRDPID,
                                                   FeatureFSRM];
   list<SubtargetFeature> ICLTuning = CNLTuning;
@@ -749,6 +748,7 @@
 
   // Icelake Server
   list<SubtargetFeature> ICXAdditionalFeatures = [FeaturePCONFIG,
+                                                  FeatureCLWB,
                                                   FeatureWBNOINVD];
   list<SubtargetFeature> ICXTuning = CNLTuning;
   list<SubtargetFeature> ICXFeatures =
@@ -756,6 +756,7 @@
 
   //Tigerlake
   list<SubtargetFeature> TGLAdditionalFeatures = [FeatureVP2INTERSECT,
+                                                  FeatureCLWB,
                                                   FeatureMOVDIRI,
                                                   FeatureMOVDIR64B,
                                                   FeatureSHSTK];