diff --git a/gcc/common/config/i386/cpuinfo.h b/gcc/common/config/i386/cpuinfo.h
index 0f86b44730b..57394a18c67 100644
--- a/gcc/common/config/i386/cpuinfo.h
+++ b/gcc/common/config/i386/cpuinfo.h
@@ -608,6 +608,12 @@ get_intel_cpu (struct __processor_model *cpu_model,
       cpu_model->__cpu_type = INTEL_COREI7;
       cpu_model->__cpu_subtype = INTEL_COREI7_ARROWLAKE_S;
       break;
+    case 0xdd:
+      /* Clear Water Forest.  */
+      cpu = "clearwaterforest";
+      CHECK___builtin_cpu_is ("clearwaterforest");
+      cpu_model->__cpu_type = INTEL_CLEARWATERFOREST;
+      break;
     case 0x17:
     case 0x1d:
       /* Penryn.  */
diff --git a/gcc/common/config/i386/i386-common.cc b/gcc/common/config/i386/i386-common.cc
index 13e423deceb..903034d2afd 100644
--- a/gcc/common/config/i386/i386-common.cc
+++ b/gcc/common/config/i386/i386-common.cc
@@ -2077,6 +2077,7 @@ const char *const processor_names[] =
   "tremont",
   "sierraforest",
   "grandridge",
+  "clearwaterforest",
   "knl",
   "knm",
   "skylake",
@@ -2246,6 +2247,8 @@ const pta processor_alias_table[] =
     M_CPU_SUBTYPE (INTEL_SIERRAFOREST), P_PROC_AVX2},
   {"grandridge", PROCESSOR_GRANDRIDGE, CPU_HASWELL, PTA_GRANDRIDGE,
     M_CPU_TYPE (INTEL_GRANDRIDGE), P_PROC_AVX2},
+  {"clearwaterforest", PROCESSOR_CLEARWATERFOREST, CPU_HASWELL,
+    PTA_CLEARWATERFOREST, M_CPU_TYPE (INTEL_CLEARWATERFOREST), P_PROC_AVX2},
   {"knl", PROCESSOR_KNL, CPU_SLM, PTA_KNL,
     M_CPU_TYPE (INTEL_KNL), P_PROC_AVX512F},
   {"knm", PROCESSOR_KNM, CPU_SLM, PTA_KNM,
diff --git a/gcc/common/config/i386/i386-cpuinfo.h b/gcc/common/config/i386/i386-cpuinfo.h
index 47e9dcfb8f7..44db6a07076 100644
--- a/gcc/common/config/i386/i386-cpuinfo.h
+++ b/gcc/common/config/i386/i386-cpuinfo.h
@@ -62,6 +62,7 @@ enum processor_types
   ZHAOXIN_FAM7H,
   INTEL_SIERRAFOREST,
   INTEL_GRANDRIDGE,
+  INTEL_CLEARWATERFOREST,
   CPU_TYPE_MAX,
   BUILTIN_CPU_TYPE_MAX = CPU_TYPE_MAX
 };
diff --git a/gcc/config.gcc b/gcc/config.gcc
index fa192637a52..2d045d6d00f 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -708,7 +708,7 @@ skylake goldmont goldmont-plus tremont cascadelake tigerlake cooperlake \
 sapphirerapids alderlake rocketlake eden-x2 nano nano-1000 nano-2000 nano-3000 \
 nano-x2 eden-x4 nano-x4 lujiazui x86-64 x86-64-v2 x86-64-v3 x86-64-v4 \
 sierraforest graniterapids graniterapids-d grandridge arrowlake arrowlake-s \
-native"
+clearwaterforest native"
 
 # Additional x86 processors supported by --with-cpu=.  Each processor
 # MUST be separated by exactly one space.
diff --git a/gcc/config/i386/driver-i386.cc b/gcc/config/i386/driver-i386.cc
index 08d0aed6183..a21f2dfe82f 100644
--- a/gcc/config/i386/driver-i386.cc
+++ b/gcc/config/i386/driver-i386.cc
@@ -591,8 +591,11 @@ const char *host_detect_local_cpu (int argc, const char **argv)
 	      /* This is unknown family 0x6 CPU.  */
 	      if (has_feature (FEATURE_AVX))
 		{
+		  /* Assume Clear Water Forest.  */
+		  if (has_feature (FEATURE_USER_MSR))
+		    cpu = "clearwaterforest";
 		  /* Assume Arrow Lake S.  */
-		  if (has_feature (FEATURE_SM3))
+		  else if (has_feature (FEATURE_SM3))
 		    cpu = "arrowlake-s";
 		  /* Assume Grand Ridge.  */
 		  else if (has_feature (FEATURE_RAOINT))
diff --git a/gcc/config/i386/i386-c.cc b/gcc/config/i386/i386-c.cc
index 042ad8b9d9c..7ac95a923be 100644
--- a/gcc/config/i386/i386-c.cc
+++ b/gcc/config/i386/i386-c.cc
@@ -210,6 +210,10 @@ ix86_target_macros_internal (HOST_WIDE_INT isa_flag,
       def_or_undef (parse_in, "__grandridge");
       def_or_undef (parse_in, "__grandridge__");
       break;
+    case PROCESSOR_CLEARWATERFOREST:
+      def_or_undef (parse_in, "__clearwaterforest");
+      def_or_undef (parse_in, "__clearwaterforest__");
+      break;
     case PROCESSOR_KNL:
       def_or_undef (parse_in, "__knl");
       def_or_undef (parse_in, "__knl__");
@@ -415,6 +419,9 @@ ix86_target_macros_internal (HOST_WIDE_INT isa_flag,
     case PROCESSOR_GRANDRIDGE:
       def_or_undef (parse_in, "__tune_grandridge__");
       break;
+    case PROCESSOR_CLEARWATERFOREST:
+      def_or_undef (parse_in, "__tune_clearwaterforest__");
+      break;
     case PROCESSOR_KNL:
       def_or_undef (parse_in, "__tune_knl__");
       break;
diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index 818954d6dbc..1d28258b4fa 100644
--- a/gcc/config/i386/i386-options.cc
+++ b/gcc/config/i386/i386-options.cc
@@ -141,7 +141,8 @@ along with GCC; see the file COPYING3.  If not see
 #define m_GRANDRIDGE (HOST_WIDE_INT_1U<<PROCESSOR_GRANDRIDGE)
 #define m_ARROWLAKE (HOST_WIDE_INT_1U<<PROCESSOR_ARROWLAKE)
 #define m_ARROWLAKE_S (HOST_WIDE_INT_1U<<PROCESSOR_ARROWLAKE_S)
-#define m_CORE_ATOM (m_SIERRAFOREST | m_GRANDRIDGE)
+#define m_CLEARWATERFOREST (HOST_WIDE_INT_1U<<PROCESSOR_CLEARWATERFOREST)
+#define m_CORE_ATOM (m_SIERRAFOREST | m_GRANDRIDGE | m_CLEARWATERFOREST)
 #define m_INTEL (HOST_WIDE_INT_1U<<PROCESSOR_INTEL)
 /* Gather Data Sampling / CVE-2022-40982 / INTEL-SA-00828.
    Software mitigation.  */
@@ -767,6 +768,7 @@ static const struct processor_costs *processor_cost_table[] =
   &tremont_cost,
   &alderlake_cost,
   &alderlake_cost,
+  &alderlake_cost,
   &slm_cost,
   &slm_cost,
   &skylake_cost,
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index e4c1fc6eef0..d7d0085f925 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -2268,6 +2268,7 @@ enum processor_type
   PROCESSOR_TREMONT,
   PROCESSOR_SIERRAFOREST,
   PROCESSOR_GRANDRIDGE,
+  PROCESSOR_CLEARWATERFOREST,
   PROCESSOR_KNL,
   PROCESSOR_KNM,
   PROCESSOR_SKYLAKE,
@@ -2402,6 +2403,8 @@ constexpr wide_int_bitmask PTA_GRANDRIDGE = PTA_SIERRAFOREST | PTA_RAOINT;
 constexpr wide_int_bitmask PTA_ARROWLAKE = PTA_SIERRAFOREST;
 constexpr wide_int_bitmask PTA_ARROWLAKE_S = PTA_ARROWLAKE | PTA_AVXVNNIINT16
   | PTA_SHA512 | PTA_SM3 | PTA_SM4;
+constexpr wide_int_bitmask PTA_CLEARWATERFOREST = PTA_ARROWLAKE_S | PTA_PREFETCHI
+  | PTA_USER_MSR;
 constexpr wide_int_bitmask PTA_KNM = PTA_KNL | PTA_AVX5124VNNIW
   | PTA_AVX5124FMAPS | PTA_AVX512VPOPCNTDQ;
 constexpr wide_int_bitmask PTA_ZNVER1 = PTA_64BIT | PTA_MMX | PTA_SSE | PTA_SSE2
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index e8180945ab4..42764bdf21d 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -22636,6 +22636,9 @@ Intel Core i7 Arrow Lake CPU.
 @item arrowlake-s
 Intel Core i7 Arrow Lake S CPU.
 
+@item clearwaterforest
+Intel Atom Clear Water Forest CPU.
+
 @item knl
 Intel Knights Landing CPU.
 
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index fee659462ff..d468e645b06 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -32842,6 +32842,15 @@ PCONFIG, PKU, VAES, VPCLMULQDQ, SERIALIZE, HRESET, KL, WIDEKL, AVX-VNNI,
 AVXIFMA, AVXVNNIINT8, AVXNECONVERT, CMPCCXADD, AVXVNNIINT16, SHA512, SM3
 and SM4 instruction set support.
 
+@item clearwaterforest
+Intel Clear Water Forest CPU with 64-bit extensions, MOVBE, MMX, SSE, SSE2,
+SSE3, SSSE3, SSE4.1, SSE4.2, POPCNT, AES, PREFETCHW, PCLMUL, RDRND, XSAVE,
+XSAVEC, XSAVES, XSAVEOPT, FSGSBASE, PTWRITE, RDPID, SGX, GFNI-SSE, CLWB,
+MOVDIRI, MOVDIR64B, CLDEMOTE, WAITPKG, ADCX, AVX, AVX2, BMI, BMI2, F16C, FMA,
+LZCNT, PCONFIG, PKU, VAES, VPCLMULQDQ, SERIALIZE, HRESET, KL, WIDEKL, AVX-VNNI,
+AVXIFMA, AVXVNNIINT8, AVXNECONVERT, CMPCCXADD, AVXVNNIINT16, SHA512, SM3, SM4,
+USER_MSR and PREFETCHI instruction set support.
+
 @item knl
 Intel Knight's Landing CPU with 64-bit extensions, MOVBE, MMX, SSE, SSE2, SSE3,
 SSSE3, SSE4.1, SSE4.2, POPCNT, CX16, SAHF, FXSR, AVX, XSAVE, PCLMUL, FSGSBASE,
diff --git a/gcc/testsuite/g++.target/i386/mv16.C b/gcc/testsuite/g++.target/i386/mv16.C
index 07f4a2a89df..d29002b18db 100644
--- a/gcc/testsuite/g++.target/i386/mv16.C
+++ b/gcc/testsuite/g++.target/i386/mv16.C
@@ -116,6 +116,10 @@ int __attribute__ ((target("arch=arrowlake-s"))) foo () {
   return 30;
 }
 
+int __attribute__ ((target("arch=clearwaterforest"))) foo () {
+  return 31;
+}
+
 int main ()
 {
   int val = foo ();
@@ -166,6 +170,8 @@ int main ()
     assert (val == 29);
   else if (__builtin_cpu_is ("arrowlake-s"))
     assert (val == 30);
+  else if (__builtin_cpu_is ("clearwaterforest"))
+    assert (val == 31);
   else
     assert (val == 0);
 
diff --git a/gcc/testsuite/gcc.target/i386/funcspec-56.inc b/gcc/testsuite/gcc.target/i386/funcspec-56.inc
index e0470a60483..c1d93243ea7 100644
--- a/gcc/testsuite/gcc.target/i386/funcspec-56.inc
+++ b/gcc/testsuite/gcc.target/i386/funcspec-56.inc
@@ -216,6 +216,7 @@ extern void test_arch_graniterapids (void)	__attribute__((__target__("arch=grani
 extern void test_arch_graniterapids_d (void)	__attribute__((__target__("arch=graniterapids-d")));
 extern void test_arch_arrowlake (void)		__attribute__((__target__("arch=arrowlake")));
 extern void test_arch_arrowlake_s (void)	__attribute__((__target__("arch=arrowlake-s")));
+extern void test_arch_clearwaterforest (void)	__attribute__((__target__("arch=clearwaterforest")));
 extern void test_arch_lujiazui (void)			__attribute__((__target__("arch=lujiazui")));
 extern void test_arch_k8 (void)			__attribute__((__target__("arch=k8")));
 extern void test_arch_k8_sse3 (void)		__attribute__((__target__("arch=k8-sse3")));
