diff options
| -rw-r--r-- | llvm/lib/Target/R600/SIISelLowering.cpp | 5 | ||||
| -rw-r--r-- | llvm/test/CodeGen/R600/unaligned-load-store.ll | 24 |
2 files changed, 29 insertions, 0 deletions
diff --git a/llvm/lib/Target/R600/SIISelLowering.cpp b/llvm/lib/Target/R600/SIISelLowering.cpp index 4545a5c648c..aeb3d131fb5 100644 --- a/llvm/lib/Target/R600/SIISelLowering.cpp +++ b/llvm/lib/Target/R600/SIISelLowering.cpp @@ -324,6 +324,11 @@ bool SITargetLowering::allowsMisalignedMemoryAccesses(EVT VT, return Align % 4 == 0; } + // Smaller than dword value must be aligned. + // FIXME: This should be allowed on CI+ + if (VT.bitsLT(MVT::i32)) + return false; + // 8.1.6 - For Dword or larger reads or writes, the two LSBs of the // byte-address are ignored, thus forcing Dword alignment. // This applies to private, global, and constant memory. diff --git a/llvm/test/CodeGen/R600/unaligned-load-store.ll b/llvm/test/CodeGen/R600/unaligned-load-store.ll index 8ed0838c4ac..665dc37c200 100644 --- a/llvm/test/CodeGen/R600/unaligned-load-store.ll +++ b/llvm/test/CodeGen/R600/unaligned-load-store.ll @@ -1,6 +1,30 @@ ; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs< %s | FileCheck -check-prefix=SI %s ; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs< %s | FileCheck -check-prefix=SI %s +; SI-LABEL: {{^}}unaligned_load_store_i16_local: +; SI: ds_read_u8 +; SI: ds_read_u8 +; SI: ds_write_b8 +; SI: ds_write_b8 +; SI: s_endpgm +define void @unaligned_load_store_i16_local(i16 addrspace(3)* %p, i16 addrspace(3)* %r) nounwind { + %v = load i16 addrspace(3)* %p, align 1 + store i16 %v, i16 addrspace(3)* %r, align 1 + ret void +} + +; SI-LABEL: {{^}}unaligned_load_store_i16_global: +; SI: buffer_load_ubyte +; SI: buffer_load_ubyte +; SI: buffer_store_byte +; SI: buffer_store_byte +; SI: s_endpgm +define void @unaligned_load_store_i16_global(i16 addrspace(1)* %p, i16 addrspace(1)* %r) nounwind { + %v = load i16 addrspace(1)* %p, align 1 + store i16 %v, i16 addrspace(1)* %r, align 1 + ret void +} + ; SI-LABEL: {{^}}unaligned_load_store_i32_local: ; SI: ds_read_u8 ; SI: ds_read_u8 |
