[all-commits] [llvm/llvm-project] c1b966: [InstCombine] Support opaque pointers in callee bi...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c1b9667148105d99f4792b46805b6a4d2aea4a6e
      https://github.com/llvm/llvm-project/commit/c1b9667148105d99f4792b46805b6a4d2aea4a6e
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2022-03-03 (Thu, 03 Mar 2022)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
    M llvm/test/Transforms/InstCombine/opaque-ptr.ll

  Log Message:
  -----------
  [InstCombine] Support opaque pointers in callee bitcast fold

To make this actually trigger, we also need to check whether the
function types differ, which is a hidden cast under opaque pointers.
The transform is somewhat less relevant there because it is
primarily about pointer bitcasts, but it can also happen with other
bit- or pointer-castable types.

Byval handling is easier with opaque pointers because there is no
need to adjust the byval type, we only need to make sure that it's
still a pointer.