[llvm] c63bbcc - [Support] Simplify isUInt (NFC) (#155976)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-08-29T09:24:14-07:00
New Revision: c63bbcc32bff9411892e78c786f9ee408f12348a

URL: https://github.com/llvm/llvm-project/commit/c63bbcc32bff9411892e78c786f9ee408f12348a
DIFF: https://github.com/llvm/llvm-project/commit/c63bbcc32bff9411892e78c786f9ee408f12348a.diff

LOG: [Support] Simplify isUInt (NFC) (#155976)

Added: 
    

Modified: 
    llvm/include/llvm/Support/MathExtras.h

Removed: 
    


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diff  --git a/llvm/include/llvm/Support/MathExtras.h b/llvm/include/llvm/Support/MathExtras.h
index c9dae7ae7346d..96ebbd61e367c 100644
--- a/llvm/include/llvm/Support/MathExtras.h
+++ b/llvm/include/llvm/Support/MathExtras.h
@@ -196,16 +196,8 @@ constexpr bool isShiftedInt(int64_t x) {
 
 /// Checks if an unsigned integer fits into the given bit width.
 template <unsigned N> constexpr bool isUInt(uint64_t x) {
-  if constexpr (N == 0)
-    return 0 == x;
-  if constexpr (N == 8)
-    return static_cast<uint8_t>(x) == x;
-  if constexpr (N == 16)
-    return static_cast<uint16_t>(x) == x;
-  if constexpr (N == 32)
-    return static_cast<uint32_t>(x) == x;
   if constexpr (N < 64)
-    return x < (UINT64_C(1) << (N));
+    return (x >> N) == 0;
   (void)x; // MSVC v19.25 warns that x is unused.
   return true;
 }