llvm-6502/lib/Target/NVPTX/CMakeLists.txt
Justin Holewinski e459c0bf65 [NVPTX] Add NVPTXLowerStructArgs pass
This works around the limitation that PTX does not allow .param space
loads/stores with arbitrary pointers.

If a function has a by-val struct ptr arg, say foo(%struct.x *byval %d), then
add the following instructions to the first basic block :

%temp = alloca %struct.x, align 8
%tt1 = bitcast %struct.x * %d to i8 *
%tt2 = llvm.nvvm.cvt.gen.to.param %tt2
%tempd = bitcast i8 addrspace(101) * to %struct.x addrspace(101) *
%tv = load %struct.x addrspace(101) * %tempd
store %struct.x %tv, %struct.x * %temp, align 8

The above code allocates some space in the stack and copies the incoming
struct from param space to local space. Then replace all occurences of %d
by %temp.

Fixes PR21465.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221377 91177308-0d34-0410-b5e6-96231b3b80d8
2014-11-05 18:19:30 +00:00

40 lines
1.0 KiB
CMake

set(LLVM_TARGET_DEFINITIONS NVPTX.td)
tablegen(LLVM NVPTXGenRegisterInfo.inc -gen-register-info)
tablegen(LLVM NVPTXGenInstrInfo.inc -gen-instr-info)
tablegen(LLVM NVPTXGenAsmWriter.inc -gen-asm-writer)
tablegen(LLVM NVPTXGenDAGISel.inc -gen-dag-isel)
tablegen(LLVM NVPTXGenSubtargetInfo.inc -gen-subtarget)
add_public_tablegen_target(NVPTXCommonTableGen)
set(NVPTXCodeGen_sources
NVPTXFavorNonGenericAddrSpaces.cpp
NVPTXFrameLowering.cpp
NVPTXInstrInfo.cpp
NVPTXISelDAGToDAG.cpp
NVPTXISelLowering.cpp
NVPTXRegisterInfo.cpp
NVPTXSubtarget.cpp
NVPTXTargetMachine.cpp
NVPTXLowerAggrCopies.cpp
NVPTXutil.cpp
NVPTXAllocaHoisting.cpp
NVPTXAsmPrinter.cpp
NVPTXUtilities.cpp
NVVMReflect.cpp
NVPTXGenericToNVVM.cpp
NVPTXAssignValidGlobalNames.cpp
NVPTXPrologEpilogPass.cpp
NVPTXMCExpr.cpp
NVPTXReplaceImageHandles.cpp
NVPTXImageOptimizer.cpp
NVPTXLowerStructArgs.cpp
)
add_llvm_target(NVPTXCodeGen ${NVPTXCodeGen_sources})
add_subdirectory(TargetInfo)
add_subdirectory(InstPrinter)
add_subdirectory(MCTargetDesc)