Merging r243731:

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r243731 | Matthew.Arsenault | 2015-07-31 00:12:04 -0400 (Fri, 31 Jul 2015) | 2 lines

AMDGPU: Fix v16i32 to v16i8 truncstore

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_37@253231 91177308-0d34-0410-b5e6-96231b3b80d8

Author: tstellarAMD

lib/Target/AMDGPU/SIISelLowering.cpp

@@ -157,6 +157,7 @@ SITargetLowering::SITargetLowering(TargetMachine &TM,
 
   setTruncStoreAction(MVT::i64, MVT::i32, Expand);
   setTruncStoreAction(MVT::v8i32, MVT::v8i16, Expand);
+  setTruncStoreAction(MVT::v16i32, MVT::v16i8, Expand);
   setTruncStoreAction(MVT::v16i32, MVT::v16i16, Expand);
 
   setOperationAction(ISD::LOAD, MVT::i1, Custom);

test/CodeGen/AMDGPU/trunc-store.ll

@@ -0,0 +1,48 @@
+; RUN: llc -march=amdgcn -mcpu=verde -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
+
+; FUNC-LABEL: {{^}}truncstore_arg_v16i32_to_v16i8:
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+define void @truncstore_arg_v16i32_to_v16i8(<16 x i8> addrspace(1)* %out, <16 x i32> %in) {
+  %trunc = trunc <16 x i32> %in to <16 x i8>
+  store <16 x i8> %trunc, <16 x i8> addrspace(1)* %out
+  ret void
+}
+
+; FUNC-LABEL: {{^}}truncstore_arg_v16i64_to_v16i8:
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+; SI: buffer_store_byte
+define void @truncstore_arg_v16i64_to_v16i8(<16 x i8> addrspace(1)* %out, <16 x i64> %in) {
+  %trunc = trunc <16 x i64> %in to <16 x i8>
+  store <16 x i8> %trunc, <16 x i8> addrspace(1)* %out
+  ret void
+}