[PATCH] D79035: [clang][AIX] Implement ABIInfo and TargetCodeGenInfo for AIX

[Jason Liu via Phabricator via cfe-commits]

jasonliu marked 2 inline comments as done.
jasonliu added inline comments.


================
Comment at: clang/lib/CodeGen/TargetInfo.cpp:4317
+  if (isAggregateTypeForABI(RetTy))
+    return getNaturalAlignIndirect(RetTy);
+
----------------
Xiangling_L wrote:
> This method uses the ABI alignment of the given aggregate type which I think is not ideal due to our AIX special alignment rule. We need to use preferred alignment in this case.
> Btw also I think it's not necessary for you to rebase your patch on the power alignment patch, I can refresh the testcase when I am dealing with that one.
As it is right now in master, there is no difference between natural alignment and preferred alignment for AIX. The tentative direction is to use preferred alignment to record the actual alignment on AIX, but it is not finalized yet. I would rather leave this part of the work for the patch that's going to implement the power alignment rule for AIX.


================
Comment at: clang/test/CodeGen/aix-vaargs.c:3
+// REQUIRES: asserts
+// RUN: %clang_cc1 -triple powerpc-unknown-aix -emit-llvm -o - %s | FileCheck %s --check-prefixes=AIX-COM,AIX-M32
+// RUN: %clang_cc1 -triple powerpc64-unknown-aix -emit-llvm -o - %s | FileCheck %s --check-prefixes=AIX-COM,AIX-M64
----------------
Xiangling_L wrote:
> Consistent with other testcases to use `AIX32/AIX64`?
I chose AIX-M32/AIX-M64 mainly because the length is the same as AIX-COM so we don't need to worry about aligning the space. I would prefer to keep it that.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D79035/new/

https://reviews.llvm.org/D79035