[PATCH] D29881: [PPC] Reduce stack frame size by allocating parameter area on an on-demand basis for ELFv2 ABI

[Hiroshi Inoue via Phabricator via llvm-commits]

inouehrs updated this revision to Diff 88484.
inouehrs added a reviewer: hfinkel.
inouehrs added a comment.

- I updated the patch to further reduce the stack frame size. Now the average stack frame size is reduced by about 50 bytes (from 182.9 byte to 133.7 byte).
- I added assets to confirm the parameter area is allocated before actually using it.
- I added a regression test.


https://reviews.llvm.org/D29881

Files:
  lib/Target/PowerPC/PPCISelLowering.cpp
  test/CodeGen/PowerPC/stacksize.ll

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