[clang] Adjust modulemap to mark mm3dnow as textual header. (PR #107155)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-x86

Author: James Y Knight (jyknight)

<details>
<summary>Changes</summary>

This avoids issuing the deprecation diagnostic when building the module.

Not building it into a module shouldn't cause any negative impacts, since it no longer has any declarations other than the header guard. It's also very rarely included by anything.

Addresses https://github.com/llvm/llvm-project/pull/96246#issuecomment-2322453809

---
Full diff: https://github.com/llvm/llvm-project/pull/107155.diff


1 Files Affected:

- (modified) clang/lib/Headers/module.modulemap (+2-4) 


``````````diff
diff --git a/clang/lib/Headers/module.modulemap b/clang/lib/Headers/module.modulemap
index 9ffc249c8d1a23..dcaf09e8f2c558 100644
--- a/clang/lib/Headers/module.modulemap
+++ b/clang/lib/Headers/module.modulemap
@@ -66,6 +66,8 @@ module _Builtin_intrinsics [system] [extern_c] {
     textual header "__wmmintrin_aes.h"
     textual header "__wmmintrin_pclmul.h"
 
+    textual header "mm3dnow.h"
+
     explicit module mm_malloc {
       requires !freestanding
       header "mm_malloc.h"
@@ -122,10 +124,6 @@ module _Builtin_intrinsics [system] [extern_c] {
       header "popcntintrin.h"
     }
 
-    explicit module mm3dnow {
-      header "mm3dnow.h"
-    }
-
     explicit module aes_pclmul {
       header "wmmintrin.h"
       export aes

``````````

</details>


https://github.com/llvm/llvm-project/pull/107155