[clang] [X86][Driver] Enable feature ndd for -mapxf (PR #78901)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang

@llvm/pr-subscribers-clang-driver

Author: Shengchen Kan (KanRobert)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/78901.diff


3 Files Affected:

- (modified) clang/include/clang/Driver/Options.td (+3-3) 
- (modified) clang/test/Driver/x86-target-features.c (+2-2) 
- (modified) clang/test/Preprocessor/x86_target_features.c (+4-4) 


``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index f1687d823f6e0a..199537404d0c63 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -6053,11 +6053,11 @@ def mapx_features_EQ : CommaJoined<["-"], "mapx-features=">, Group<m_x86_Feature
     HelpText<"Enable features of APX">, Values<"egpr,push2pop2,ppx,ndd,ccmp,cf">;
 def mno_apx_features_EQ : CommaJoined<["-"], "mno-apx-features=">, Group<m_x86_Features_Group>,
     HelpText<"Disable features of APX">, Values<"egpr,push2pop2,ppx,ndd,ccmp,cf">;
-// Features egpr, push2pop2 and ppx are validated with llvm-test-suite && cpu2017 on Intel SDE.
+// Features egpr, push2pop2, ppx and ndd are validated with llvm-test-suite && cpu2017 on Intel SDE.
 // For stability, we turn on these features only for -mapxf. After a feature pass the validation,
 // we will add it to -mapxf.
-def mapxf : Flag<["-"], "mapxf">, Alias<mapx_features_EQ>, AliasArgs<["egpr","push2pop2","ppx"]>;
-def mno_apxf : Flag<["-"], "mno-apxf">, Alias<mno_apx_features_EQ>, AliasArgs<["egpr","push2pop2","ppx"]>;
+def mapxf : Flag<["-"], "mapxf">, Alias<mapx_features_EQ>, AliasArgs<["egpr","push2pop2","ppx", "ndd"]>;
+def mno_apxf : Flag<["-"], "mno-apxf">, Alias<mno_apx_features_EQ>, AliasArgs<["egpr","push2pop2","ppx","ndd"]>;
 } // let Flags = [TargetSpecific]
 
 // VE feature flags
diff --git a/clang/test/Driver/x86-target-features.c b/clang/test/Driver/x86-target-features.c
index 6fb9df96e2b333..998d5f37da69b4 100644
--- a/clang/test/Driver/x86-target-features.c
+++ b/clang/test/Driver/x86-target-features.c
@@ -428,8 +428,8 @@
 // RUN: %clang -target x86_64-unknown-linux-gnu -mno-apxf -mapxf %s -### -o %t.o 2>&1 | FileCheck -check-prefix=APXF %s
 // RUN: %clang -target x86_64-unknown-linux-gnu -mapxf -mno-apxf %s -### -o %t.o 2>&1 | FileCheck -check-prefix=NO-APXF %s
 //
-// APXF: "-target-feature" "+egpr" "-target-feature" "+push2pop2" "-target-feature" "+ppx"
-// NO-APXF: "-target-feature" "-egpr" "-target-feature" "-push2pop2" "-target-feature" "-ppx"
+// APXF: "-target-feature" "+egpr" "-target-feature" "+push2pop2" "-target-feature" "+ppx" "-target-feature" "+ndd"
+// NO-APXF: "-target-feature" "-egpr" "-target-feature" "-push2pop2" "-target-feature" "-ppx" "-target-feature" "-ndd"
 
 // RUN: %clang -target x86_64-unknown-linux-gnu -mapx-features=egpr %s -### -o %t.o 2>&1 | FileCheck -check-prefix=EGPR %s
 // RUN: %clang -target x86_64-unknown-linux-gnu -mapx-features=push2pop2 %s -### -o %t.o 2>&1 | FileCheck -check-prefix=PUSH2POP2 %s
diff --git a/clang/test/Preprocessor/x86_target_features.c b/clang/test/Preprocessor/x86_target_features.c
index 888eecd08d84a2..a1882043910f76 100644
--- a/clang/test/Preprocessor/x86_target_features.c
+++ b/clang/test/Preprocessor/x86_target_features.c
@@ -803,10 +803,10 @@
 // RUN: %clang -target x86_64-unknown-unknown -march=x86-64 -mapx-features=ndd -x c -E -dM -o - %s | FileCheck --check-prefix=NDD %s
 // RUN: %clang -target x86_64-unknown-unknown -march=x86-64 -mapx-features=ccmp -x c -E -dM -o - %s | FileCheck --check-prefix=CCMP %s
 // RUN: %clang -target x86_64-unknown-unknown -march=x86-64 -mapx-features=cf -x c -E -dM -o - %s | FileCheck --check-prefix=CF %s
-// RUN: %clang -target x86_64-unknown-unknown -march=x86-64 -mapxf -x c -E -dM -o - %s | FileCheck --check-prefixes=EGPR,PUSH2POP2,PPX %s
+// RUN: %clang -target x86_64-unknown-unknown -march=x86-64 -mapxf -x c -E -dM -o - %s | FileCheck --check-prefixes=EGPR,PUSH2POP2,PPX,NDD %s
+// CCMP: #define __CCMP__ 1
+// CF: #define __CF__ 1
 // EGPR: #define __EGPR__ 1
+// NDD: #define __NDD__ 1
 // PPX: #define __PPX__ 1
 // PUSH2POP2: #define __PUSH2POP2__ 1
-// NDD: #define __NDD__ 1
-// CCMP: #define __CCMP__ 1
-// CF: #define __CF__ 1

``````````

</details>


https://github.com/llvm/llvm-project/pull/78901