[NVPTX] Add lowering of i128 params.

The patch adds support of i128 params lowering. The changes are quite trivial to
support i128 as a "special case" of integer type. With this patch, we lower i128
params the same way as aggregates of size 16 bytes: .param .b8 _ [16].

Currently, NVPTX can't deal with the 128 bit integers:
* in some cases because of failed assertions like
  ValVTs.size() == OutVals.size() && "Bad return value decomposition"
* in other cases emitting PTX with .i128 or .u128 types (which are not valid [1])
  [1] http://docs.nvidia.com/cuda/parallel-thread-execution/index.html#fundamental-types

Differential Revision: https://reviews.llvm.org/D34555
Patch by: Denys Zariaiev (denys.zariaiev@gmail.com)

llvm-svn: 308675

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp b/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
index 2b6ba8c85d4..ac21563ee9a 100644
--- a/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp
@@ -81,7 +81,7 @@ static std::string computeDataLayout(bool is64Bit) {
   if (!is64Bit)
     Ret += "-p:32:32";
 
-  Ret += "-i64:64-v16:16-v32:32-n16:32:64";
+  Ret += "-i64:64-i128:128-v16:16-v32:32-n16:32:64";
 
   return Ret;
 }