[PATCH] D47633: [GlobalMerge] Set the alignment on merged global structs

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: efriedma, qcolombet, haicheng, john.brawn.
Herald added a reviewer: javed.absar.

If no alignment is set, the abi/preferred alignment of structs will be
used which may be higher than required. This can lead to extra padding
and in the end an increase in data size.


https://reviews.llvm.org/D47633

Files:
  lib/CodeGen/GlobalMerge.cpp
  test/CodeGen/AArch64/global-merge-1.ll
  test/CodeGen/AArch64/global-merge-2.ll
  test/CodeGen/AArch64/global-merge-3.ll
  test/CodeGen/AArch64/global-merge-4.ll
  test/CodeGen/AArch64/global-merge-group-by-use.ll
  test/CodeGen/AArch64/global-merge-ignore-single-use-minsize.ll
  test/CodeGen/AArch64/global-merge-ignore-single-use.ll
  test/CodeGen/ARM/global-merge-1.ll
  test/CodeGen/ARM/global-merge-alignment.ll
  test/Transforms/GlobalMerge/debug-info.ll

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