[xen staging] xen: Drop logic for old clang versions

[patchbot@xxxxxxx]

commit e4a042062787423646b71d7bc20fdf445be9ab79
Author:     Nicola Vetrini <nicola.vetrini@xxxxxxxxx>
AuthorDate: Tue Aug 12 09:58:39 2025 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Aug 12 11:40:28 2025 +0200

    xen: Drop logic for old clang versions
    
    The enforced toolchain baseline for clang is version 11,
    therefore this logic is effectively dead code.
    
    No functional change.
    
    Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxx>
    Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
 xen/common/coverage/llvm.c   | 4 ----
 xen/include/xen/self-tests.h | 9 +--------
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/xen/common/coverage/llvm.c b/xen/common/coverage/llvm.c
index 50d7a3c5d3..517b2aa8c2 100644
--- a/xen/common/coverage/llvm.c
+++ b/xen/common/coverage/llvm.c
@@ -44,12 +44,8 @@
     ((uint64_t)'f' << 16) | ((uint64_t)'R' << 8)  | ((uint64_t)129)
 #endif
 
-#if __clang_major__ >= 4 || (__clang_major__ == 3 && __clang_minor__ >= 9)
 #define LLVM_PROFILE_VERSION    4
 #define LLVM_PROFILE_NUM_KINDS  2
-#else
-#error "clang version not supported with coverage"
-#endif
 
 struct llvm_profile_data {
     uint64_t name_ref;
diff --git a/xen/include/xen/self-tests.h b/xen/include/xen/self-tests.h
index bd8a4867aa..c57cceb3b9 100644
--- a/xen/include/xen/self-tests.h
+++ b/xen/include/xen/self-tests.h
@@ -10,16 +10,12 @@
 #include <xen/lib.h>
 
 /*
- * Check that fn(val) can be calcuated by the compiler, and that it gives the
+ * Check that fn(val) can be calculated by the compiler, and that it gives the
  * expected answer.
  *
- * Clang < 8 can't fold constants through static inlines, causing this to
- * fail.  Simply skip it for incredibly old compilers.
- *
  * N.B. fn is intentionally not bracketed to allow us to test function-like
  * macros too.
  */
-#if !defined(CONFIG_CC_IS_CLANG) || CONFIG_CLANG_VERSION >= 80000
 #define COMPILE_CHECK(fn, val, res)                                     \
     do {                                                                \
         typeof(fn(val)) real = fn(val);                                 \
@@ -29,9 +25,6 @@
         else if ( real != (res) )                                       \
             BUILD_ERROR("Compile time check '" STR(fn(val) == res) "' 
failed"); \
     } while ( 0 )
-#else
-#define COMPILE_CHECK(fn, val, res)
-#endif
 
 /*
  * Check that Xen's runtime logic for fn(val) gives the expected answer.  This
--
generated by git-patchbot for /home/xen/git/xen.git#staging