Switch IS_TRIVIALLY_RELOCATABLE to __builtin_is_cpp_trivially_relocatable

__is_trivially_relocatable is deprecated since
llvm/llvm-project#138835

Bug: 416394845
Change-Id: I10c9e8a2adec49f9f3b3b7c3606bdf7027b01a10
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6534163
Reviewed-by: Daniel Cheng <[email protected]>
Auto-Submit: Hans Wennborg <[email protected]>
Commit-Queue: Daniel Cheng <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1458903}
NOKEYCHECK=True
GitOrigin-RevId: 4ed2c83bf081877d7929eb20655fe4768f71c984

Author: zmodem

compiler_specific.h

@@ -587,15 +587,19 @@ inline constexpr bool AnalyzerAssumeTrue(bool arg) {
 //
 // See also:
 //   https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p1144r8.html
-//   https://clang.llvm.org/docs/LanguageExtensions.html#:~:text=__is_trivially_relocatable
+//   https://clang.llvm.org/docs/LanguageExtensions.html#:~:text=__builtin_is_cpp_trivially_relocatable
 //
 // Usage:
 // ```
 //   if constexpr (IS_TRIVIALLY_RELOCATABLE(T)) {
 //     // This block will only be executed if type `T` is trivially relocatable.
 //   }
 // ```
-#if HAS_BUILTIN(__is_trivially_relocatable)
+#if HAS_BUILTIN(__builtin_is_cpp_trivially_relocatable)
+#define IS_TRIVIALLY_RELOCATABLE(t) __builtin_is_cpp_trivially_relocatable(t)
+#elif HAS_BUILTIN(__is_trivially_relocatable)
+// TODO(crbug.com/416394845): This is deprecated. Remove once all toolchains
+// have __builtin_is_cpp_trivially_relocatable.
 #define IS_TRIVIALLY_RELOCATABLE(t) __is_trivially_relocatable(t)
 #else
 #define IS_TRIVIALLY_RELOCATABLE(t) false