[ADT] Simplify PointerBitMask in PointerIntPair.h (NFC)

[kazutakahirata]

A left shift of (uintptr_t)-1) is simpler.

[llvmbot]

@llvm/pr-subscribers-llvm-adt

Author: Kazu Hirata (kazutakahirata)

Changes

A left shift of (uintptr_t)-1) is simpler.

---

Full diff: https://github.com/llvm/llvm-project/pull/158210.diff

1 Files Affected:

• (modified) llvm/include/llvm/ADT/PointerIntPair.h (+1-2)

diff --git a/llvm/include/llvm/ADT/PointerIntPair.h b/llvm/include/llvm/ADT/PointerIntPair.h
index 9cfc65846d5bf..8acc2cf2d4f07 100644
--- a/llvm/include/llvm/ADT/PointerIntPair.h
+++ b/llvm/include/llvm/ADT/PointerIntPair.h
@@ -173,8 +173,7 @@ struct PointerIntPairInfo {
                 "PointerIntPair with integer size too large for pointer");
   enum MaskAndShiftConstants : uintptr_t {
     /// PointerBitMask - The bits that come from the pointer.
-    PointerBitMask =
-        ~(uintptr_t)(((intptr_t)1 << PtrTraits::NumLowBitsAvailable) - 1),
+    PointerBitMask = ((uintptr_t)-1) << PtrTraits::NumLowBitsAvailable,
 
     /// IntShift - The number of low bits that we reserve for other uses, and
     /// keep zero.