clang/HIP: Use abs builtins instead of implementing them

InstCombine already put these back together so there's no visible change in the -O1 test for the header.
llvm · Aug 15, 2023 · 43f314f · 43f314f
1 parent a68b87d
commit 43f314f
Showing 1 changed file with 3 additions and 6 deletions.
diff --git a/clang/lib/Headers/__clang_hip_math.h b/clang/lib/Headers/__clang_hip_math.h
@@ -315,18 +315,15 @@ float __tanf(float __x) {
 #if defined(__cplusplus)
 __DEVICE__
 int abs(int __x) {
-  int __sgn = __x >> (sizeof(int) * CHAR_BIT - 1);
-  return (__x ^ __sgn) - __sgn;
+  return __builtin_abs(__x);
 }
 __DEVICE__
 long labs(long __x) {
-  long __sgn = __x >> (sizeof(long) * CHAR_BIT - 1);
-  return (__x ^ __sgn) - __sgn;
+  return __builtin_labs(__x);
 }
 __DEVICE__
 long long llabs(long long __x) {
-  long long __sgn = __x >> (sizeof(long long) * CHAR_BIT - 1);
-  return (__x ^ __sgn) - __sgn;
+  return __builtin_llabs(__x);
 }
 #endif