[clang] 69e0fd6 - [X86] Remove PREFETCHI from PTL (#163196)

[via cfe-commits]

Author: Mikołaj Piróg
Date: 2025-10-14T12:47:27+02:00
New Revision: 69e0fd6d8dea666205fca52265f09b3eb5ee2f3d

URL: https://github.com/llvm/llvm-project/commit/69e0fd6d8dea666205fca52265f09b3eb5ee2f3d
DIFF: https://github.com/llvm/llvm-project/commit/69e0fd6d8dea666205fca52265f09b3eb5ee2f3d.diff

LOG: [X86] Remove PREFETCHI from PTL (#163196)

Per Intel Architecture Instruction Set Extensions Programming Reference
rev. 59 (https://cdrdv2.intel.com/v1/dl/getContent/671368), table 1-2,
PTL doesn't have support for PREFETCHI.

Added: 
    

Modified: 
    clang/test/Preprocessor/predefined-arch-macros.c
    llvm/lib/Target/X86/X86.td
    llvm/lib/TargetParser/X86TargetParser.cpp

Removed: 
    


################################################################################
diff  --git a/clang/test/Preprocessor/predefined-arch-macros.c b/clang/test/Preprocessor/predefined-arch-macros.c
index ecddf130a5c51..44089c492b26a 100644
--- a/clang/test/Preprocessor/predefined-arch-macros.c
+++ b/clang/test/Preprocessor/predefined-arch-macros.c
@@ -2525,10 +2525,10 @@
 // RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_ARL_M32,CHECK_ARLS_M32,CHECK_KL_M32
 // RUN: %clang -march=pantherlake -m32 -E -dM %s -o - 2>&1 \
 // RUN:     -target i386-unknown-linux \
-// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_ARL_M32,CHECK_ARLS_M32,CHECK_PTL_M32,CHECK_NKL_M32
+// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_ARL_M32,CHECK_ARLS_M32,CHECK_NKL_M32
 // RUN: %clang -march=clearwaterforest -m32 -E -dM %s -o - 2>&1 \
 // RUN:     -target i386-unknown-linux \
-// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_SRF_M32,CHECK_ARLS_M32,CHECK_PTL_M32,CHECK_CWF_M32,CHECK_NKL_M32
+// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_SRF_M32,CHECK_ARLS_M32,CHECK_CWF_M32,CHECK_NKL_M32
 // CHECK_ARL_M32: #define __ADX__ 1
 // CHECK_ARL_M32: #define __AES__ 1
 // CHECK_ARL_M32: #define __AVX2__ 1
@@ -2568,7 +2568,7 @@
 // CHECK_ARL_M32: #define __POPCNT__ 1
 // CHECK_ARL_M32-NOT: #define __PREFETCHI__ 1
 // CHECK_ARLS_M32-NOT: #define __PREFETCHI__ 1
-// CHECK_PTL_M32: #define __PREFETCHI__ 1
+// CHECK_CWF_M32: #define __PREFETCHI__ 1
 // CHECK_ARL_M32: #define __PRFCHW__ 1
 // CHECK_ARL_M32: #define __PTWRITE__ 1
 // CHECK_ARL_M32-NOT: #define __RAOINT__ 1
@@ -2595,7 +2595,6 @@
 // CHECK_ARL_M32: #define __UINTR__ 1
 // CHECK_ARL_M32-NOT: #define __USERMSR__ 1
 // CHECK_ARLS_M32-NOT: #define __USERMSR__ 1
-// CHECK_PTL_M32-NOT: #define __USERMSR__ 1
 // CHECK_CWF_M32: #define __USERMSR__ 1
 // CHECK_ARL_M32: #define __VAES__ 1
 // CHECK_ARL_M32: #define __VPCLMULQDQ__ 1
@@ -2630,10 +2629,10 @@
 // RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_ARL_M64,CHECK_ARLS_M64,CHECK_KL_M64
 // RUN: %clang -march=pantherlake -m64 -E -dM %s -o - 2>&1 \
 // RUN:     -target i386-unknown-linux \
-// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_ARL_M64,CHECK_ARLS_M64,CHECK_PTL_M64,CHECK_NKL_M64
+// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_ARL_M64,CHECK_ARLS_M64,CHECK_NKL_M64
 // RUN: %clang -march=clearwaterforest -m64 -E -dM %s -o - 2>&1 \
 // RUN:     -target i386-unknown-linux \
-// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_ARL_M64,CHECK_SRF_M64,CHECK_ARLS_M64,CHECK_PTL_M64,CHECK_CWF_M64,CHECK_NKL_M64
+// RUN:   | FileCheck -match-full-lines %s -check-prefixes=CHECK_ARL_M64,CHECK_SRF_M64,CHECK_ARLS_M64,CHECK_CWF_M64,CHECK_NKL_M64
 // CHECK_ARL_M64: #define __ADX__ 1
 // CHECK_ARL_M64: #define __AES__ 1
 // CHECK_ARL_M64: #define __AVX2__ 1
@@ -2673,7 +2672,7 @@
 // CHECK_ARL_M64: #define __POPCNT__ 1
 // CHECK_ARL_M64-NOT: #define __PREFETCHI__ 1
 // CHECK_ARLS_M64-NOT: #define __PREFETCHI__ 1
-// CHECK_PTL_M64: #define __PREFETCHI__ 1
+// CHECK_CWF_M64: #define __PREFETCHI__ 1
 // CHECK_ARL_M64: #define __PRFCHW__ 1
 // CHECK_ARL_M64: #define __PTWRITE__ 1
 // CHECK_ARL_M64-NOT: #define __RAOINT__ 1
@@ -2701,7 +2700,6 @@
 // CHECK_ARL_M64: #define __UINTR__ 1
 // CHECK_ARL_M64-NOT: #define __USERMSR__ 1
 // CHECK_ARLS_M64-NOT: #define __USERMSR__ 1
-// CHECK_PTL_M64-NOT: #define __USERMSR__ 1
 // CHECK_CWF_M64: #define __USERMSR__ 1
 // CHECK_ARL_M64: #define __VAES__ 1
 // CHECK_ARL_M64: #define __VPCLMULQDQ__ 1

diff  --git a/llvm/lib/Target/X86/X86.td b/llvm/lib/Target/X86/X86.td
index 3af8b3e060a16..2bf016ad7ee94 100644
--- a/llvm/lib/Target/X86/X86.td
+++ b/llvm/lib/Target/X86/X86.td
@@ -1335,9 +1335,8 @@ def ProcessorFeatures {
     !listconcat(ARLFeatures, ARLSAdditionalFeatures);
 
   // Pantherlake
-  list<SubtargetFeature> PTLAdditionalFeatures = [FeaturePREFETCHI];
   list<SubtargetFeature> PTLFeatures =
-    !listremove(!listconcat(ARLSFeatures, PTLAdditionalFeatures), [FeatureWIDEKL]);
+    !listremove(ARLSFeatures, [FeatureWIDEKL]);
 
 
   // Clearwaterforest

diff  --git a/llvm/lib/TargetParser/X86TargetParser.cpp b/llvm/lib/TargetParser/X86TargetParser.cpp
index edca7c18062ae..1932a3a372bf4 100644
--- a/llvm/lib/TargetParser/X86TargetParser.cpp
+++ b/llvm/lib/TargetParser/X86TargetParser.cpp
@@ -175,7 +175,7 @@ constexpr FeatureBitset FeaturesArrowlakeS =
     FeaturesArrowlake | FeatureAVXVNNIINT16 | FeatureSHA512 | FeatureSM3 |
     FeatureSM4;
 constexpr FeatureBitset FeaturesPantherlake =
-    (FeaturesArrowlakeS ^ FeatureWIDEKL) | FeaturePREFETCHI;
+    (FeaturesArrowlakeS ^ FeatureWIDEKL);
 constexpr FeatureBitset FeaturesClearwaterforest =
     (FeaturesSierraforest ^ FeatureWIDEKL) | FeatureAVXVNNIINT16 |
     FeatureSHA512 | FeatureSM3 | FeatureSM4 | FeaturePREFETCHI | FeatureUSERMSR;