[all-commits] [llvm/llvm-project] 4d7880: [InferAlignment] Fix updating alignment when large...

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4d7880129bcccf76816078d976de9282c7d5aac8
      https://github.com/llvm/llvm-project/commit/4d7880129bcccf76816078d976de9282c7d5aac8
  Author: Joseph Huber <huberjn at outlook.com>
  Date:   2025-09-22 (Mon, 22 Sep 2025)

  Changed paths:
    M llvm/lib/Transforms/Scalar/InferAlignment.cpp
    M llvm/test/Transforms/InferAlignment/masked.ll

  Log Message:
  -----------
  [InferAlignment] Fix updating alignment when larger than i32 (#160109)

Summary:
The changes made in https://github.com/llvm/llvm-project/pull/156057
allows the alignment value to be increased. We assert effectively
infinite alignment when the pointer argument is invalid / null. The
problem is that for whatever reason the masked load / store functions
use i32 for their alignment value which means this gets truncated to
zero.

Add a special check for this, long term we probably want to just remove
this argument entirely.



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