[PATCH] D33842: [AMDGPU] Fix address space of global variable

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
Herald added subscribers: t-tye, tpr, dstuttard, wdng, kzhuravl.

amdgcn target requires global variable to stay in global or constant address space.
In C or C++ global variables are emitted in the default (generic) address space
which the amdgcn backend cannot handle.

This patch emits global variables in global or constant address space and cast
them to generic address space, in a similar approach as CUDA.

It also fixes pointer size and metadata issue so that standard initializer list is
supported.

This patch was originally part of https://reviews.llvm.org/D33706.


https://reviews.llvm.org/D33842

Files:
  lib/Basic/Targets.cpp
  lib/CodeGen/CGExpr.cpp
  lib/CodeGen/CodeGenModule.cpp
  lib/CodeGen/TargetInfo.cpp
  test/CodeGen/address-space.c
  test/CodeGen/default-address-space.c
  test/CodeGenCXX/amdgcn-automatic-variable.cpp
  test/CodeGenCXX/cxx0x-initializer-stdinitializerlist.cpp

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