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-rw-r--r--unittests/Support/AllocatorTest.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/unittests/Support/AllocatorTest.cpp b/unittests/Support/AllocatorTest.cpp
index 463760d2f0..2a01f3a9c4 100644
--- a/unittests/Support/AllocatorTest.cpp
+++ b/unittests/Support/AllocatorTest.cpp
@@ -108,7 +108,7 @@ public:
void *MemBase = malloc(Size + Alignment - 1 + sizeof(void*));
// Make the slab.
- MemSlab *Slab = (MemSlab*)(((uintptr_t)MemBase + Alignment - 1) &
+ MemSlab *Slab = (MemSlab*)(((uintptr_t)MemBase+sizeof(void*)+Alignment-1) &
~(uintptr_t)(Alignment - 1));
Slab->Size = Size;
Slab->NextPtr = 0;