[llvm] [AMDGPU] Fix crash in allowsMisalignedMemoryAccesses with i1 (PR #105794)

[Jay Foad via llvm-commits]

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@@ -1695,7 +1695,8 @@ bool SITargetLowering::allowsMisalignedMemoryAccessesImpl(
     if (!Subtarget->hasUnalignedDSAccessEnabled() && Alignment < Align(4))
       return false;
 
-    Align RequiredAlignment(PowerOf2Ceil(Size/8)); // Natural alignment.
+    Align RequiredAlignment(
+        PowerOf2Ceil(std::max(Size / 8, 1u))); // Natural alignment.
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jayfoad wrote:

Use divideCeil?

https://github.com/llvm/llvm-project/pull/105794