tree 87e8bb132b370ebaaa3c95fe2111aee47f005d44
parent fa92040aa789d7b7b69fcd70b4b4a821b05c2378
author Tim Northover <tnorthover@apple.com> 1555329834 +0000
committer Tim Northover <tnorthover@apple.com> 1555329834 +0000

DAG: propagate whether an arg is a pointer for CallingConv decisions.

The arm64_32 ABI specifies that pointers (despite being 32-bits) should be
zero-extended to 64-bits when passed in registers for efficiency reasons. This
means that the SelectionDAG needs to be able to tell the backend that an
argument was originally a pointer, which is implmented here.

Additionally, some memory intrinsics need to be declared as taking an i8*
instead of an iPTR.

There should be no CodeGen change yet, but it will be triggered when AArch64
backend support for ILP32 is added.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358398 91177308-0d34-0410-b5e6-96231b3b80d8