[PATCH] D16315: [ppc64] Enable sibling call optimization on ppc64 ELFv1/ELFv2 abi

[Chuang-Yu Cheng via llvm-commits]

cycheng created this revision.
cycheng added reviewers: hfinkel, kbarton.
cycheng added subscribers: tjablin, llvm-commits.

This patch enable sibling call optimization on ppc64 ELFv1/ELFv2 abi, and add a couple of test cases.
This patch also passed llvm/clang bootstrap test, and spec2006 build/run/result validation. 

Original issue: https://llvm.org/bugs/show_bug.cgi?id=25617

Great thanks to Tom's help, he contributed a lot to this patch.

http://reviews.llvm.org/D16315

Files:
  lib/Target/PowerPC/PPCISelLowering.cpp
  lib/Target/PowerPC/PPCISelLowering.h
  test/CodeGen/PowerPC/ppc64-calls.ll
  test/CodeGen/PowerPC/ppc64-sibcall.ll

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