[clang] [llvm] [compiler-rt] [X86] Support APXF to enable __builtin_cpu_supports. (PR #80636)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-x86

Author: Freddy Ye (FreddyLeaf)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/80636.diff


5 Files Affected:

- (modified) clang/test/CodeGen/target-builtin-noerror.c (+1) 
- (modified) compiler-rt/lib/builtins/cpu_model/x86.c (+3-1) 
- (modified) llvm/include/llvm/TargetParser/X86TargetParser.def (+2-1) 
- (modified) llvm/lib/TargetParser/Host.cpp (+1) 
- (modified) llvm/lib/TargetParser/X86TargetParser.cpp (+1) 


``````````diff
diff --git a/clang/test/CodeGen/target-builtin-noerror.c b/clang/test/CodeGen/target-builtin-noerror.c
index 9608b5f37baaa..b438e50848a4b 100644
--- a/clang/test/CodeGen/target-builtin-noerror.c
+++ b/clang/test/CodeGen/target-builtin-noerror.c
@@ -141,6 +141,7 @@ void verifyfeaturestrings(void) {
   (void)__builtin_cpu_supports("sm3");
   (void)__builtin_cpu_supports("sha512");
   (void)__builtin_cpu_supports("sm4");
+  (void)__builtin_cpu_supports("apxf");
   (void)__builtin_cpu_supports("usermsr");
   (void)__builtin_cpu_supports("avx10.1-256");
   (void)__builtin_cpu_supports("avx10.1-512");
diff --git a/compiler-rt/lib/builtins/cpu_model/x86.c b/compiler-rt/lib/builtins/cpu_model/x86.c
index 1afa468c4ae8c..35375c6e8d55b 100644
--- a/compiler-rt/lib/builtins/cpu_model/x86.c
+++ b/compiler-rt/lib/builtins/cpu_model/x86.c
@@ -217,7 +217,7 @@ enum ProcessorFeatures {
   FEATURE_SM3,
   FEATURE_SHA512,
   FEATURE_SM4,
-  // FEATURE_APXF,
+  FEATURE_APXF,
   FEATURE_USERMSR = 112,
   FEATURE_AVX10_1_256,
   FEATURE_AVX10_1_512,
@@ -983,6 +983,8 @@ static void getAvailableFeatures(unsigned ECX, unsigned EDX, unsigned MaxLeaf,
     setFeature(FEATURE_USERMSR);
   if (HasLeaf7Subleaf1 && ((EDX >> 19) & 1))
     setFeature(FEATURE_AVX10_1_256);
+  if (HasLeaf7Subleaf1 && ((EDX >> 21) & 1))
+    setFeature(FEATURE_APXF);
 
   unsigned MaxLevel;
   getX86CpuIDAndInfo(0, &MaxLevel, &EBX, &ECX, &EDX);
diff --git a/llvm/include/llvm/TargetParser/X86TargetParser.def b/llvm/include/llvm/TargetParser/X86TargetParser.def
index 4c630c1eb06e8..ec52062a2baac 100644
--- a/llvm/include/llvm/TargetParser/X86TargetParser.def
+++ b/llvm/include/llvm/TargetParser/X86TargetParser.def
@@ -248,10 +248,11 @@ X86_FEATURE_COMPAT(AVXVNNIINT16,    "avxvnniint16",           0)
 X86_FEATURE_COMPAT(SM3,             "sm3",                    0)
 X86_FEATURE_COMPAT(SHA512,          "sha512",                 0)
 X86_FEATURE_COMPAT(SM4,             "sm4",                    0)
-X86_FEATURE       (EGPR,            "egpr")
+X86_FEATURE_COMPAT(APXF,            "apxf",                   0)
 X86_FEATURE_COMPAT(USERMSR,         "usermsr",                0)
 X86_FEATURE_COMPAT(AVX10_1,         "avx10.1-256",            0)
 X86_FEATURE_COMPAT(AVX10_1_512,     "avx10.1-512",            0)
+X86_FEATURE       (EGPR,            "egpr")
 X86_FEATURE       (EVEX512,         "evex512")
 X86_FEATURE       (CF,              "cf")
 // These features aren't really CPU features, but the frontend can set them.
diff --git a/llvm/lib/TargetParser/Host.cpp b/llvm/lib/TargetParser/Host.cpp
index f1197c2965538..233ee12a00096 100644
--- a/llvm/lib/TargetParser/Host.cpp
+++ b/llvm/lib/TargetParser/Host.cpp
@@ -1845,6 +1845,7 @@ bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
   Features["prefetchi"]  = HasLeaf7Subleaf1 && ((EDX >> 14) & 1);
   Features["usermsr"]  = HasLeaf7Subleaf1 && ((EDX >> 15) & 1);
   Features["avx10.1-256"] = HasLeaf7Subleaf1 && ((EDX >> 19) & 1);
+  Features["apxf"] = HasLeaf7Subleaf1 && ((EDX >> 21) & 1);
 
   bool HasLeafD = MaxLevel >= 0xd &&
                   !getX86CpuIDAndInfoEx(0xd, 0x1, &EAX, &EBX, &ECX, &EDX);
diff --git a/llvm/lib/TargetParser/X86TargetParser.cpp b/llvm/lib/TargetParser/X86TargetParser.cpp
index 21f46f576490a..ea1f8517bb332 100644
--- a/llvm/lib/TargetParser/X86TargetParser.cpp
+++ b/llvm/lib/TargetParser/X86TargetParser.cpp
@@ -633,6 +633,7 @@ constexpr FeatureBitset ImpliedFeaturesPPX = {};
 constexpr FeatureBitset ImpliedFeaturesNDD = {};
 constexpr FeatureBitset ImpliedFeaturesCCMP = {};
 constexpr FeatureBitset ImpliedFeaturesCF = {};
+constexpr FeatureBitset ImpliedFeaturesAPXF = {};
 
 constexpr FeatureInfo FeatureInfos[X86::CPU_FEATURE_MAX] = {
 #define X86_FEATURE(ENUM, STR) {{"+" STR}, ImpliedFeatures##ENUM},

``````````

</details>


https://github.com/llvm/llvm-project/pull/80636