ritter-x2a wrote: I think I might have found the culprit: `AMDGPUPromoteAllocaToVectorPass` Attached is the IR before and after that pass, with interesting points marked with `; HERE: `. A `%arrayidx = getelementptr i8, ptr addrspace(5) %14, i64 -1` (AS 5 is the private/scratch address space, so pointers have 32 bits) seems to be translated into `%15 = add i64 4294967295, %conv6`, which adds a zero-extended 32-bit -1 in 64 bits. That probably should be sign-extended instead.
[around-AMDGPUPromoteAllocaToVectorPass.ll.txt](https://github.com/user-attachments/files/22229340/around-AMDGPUPromoteAllocaToVectorPass.ll.txt) https://github.com/llvm/llvm-project/pull/155415 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
