[llvm-branch-commits] [llvm] release/23.x: [Allocator] Cap MinAlign at alignof(max_align_t) (#235373) (PR #235386)

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<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-support

Author: llvmbot

<details>
<summary>Changes</summary>

Backport 0b6b6ed806536c1b170101061ff3eeed91c8f061

Requested by: @<!-- -->MaskRay

---
Full diff: https://github.com/llvm/llvm-project/pull/235386.diff


1 Files Affected:

- (modified) llvm/include/llvm/Support/Allocator.h (+1-1) 


``````````diff
diff --git a/llvm/include/llvm/Support/Allocator.h b/llvm/include/llvm/Support/Allocator.h
index bb0ca118e20157..b5f40ef72cd718 100644
--- a/llvm/include/llvm/Support/Allocator.h
+++ b/llvm/include/llvm/Support/Allocator.h
@@ -64,7 +64,7 @@ LLVM_ABI void printBumpPtrAllocatorStats(unsigned NumSlabs, size_t TotalMemory);
 /// CurPtr when the requested alignment is no greater than MinAlign.
 template <typename AllocatorT = MallocAllocator, size_t SlabSize = 4096,
           size_t SizeThreshold = SlabSize, size_t GrowthDelay = 128,
-          size_t MinAlign = 8>
+          size_t MinAlign = std::min<size_t>(8, alignof(std::max_align_t))>
 class BumpPtrAllocatorImpl
     : public AllocatorBase<BumpPtrAllocatorImpl<
           AllocatorT, SlabSize, SizeThreshold, GrowthDelay, MinAlign>>,

``````````

</details>


https://github.com/llvm/llvm-project/pull/235386