AMDGPU: Add core backend files for R600/SI codegen v6

llvm-svn: 160270

1 files changed, 139 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUUtil.cpp b/llvm/lib/Target/AMDGPU/AMDGPUUtil.cpp
new file mode 100644
index 00000000000..63b359ffc14
--- /dev/null
+++ b/llvm/lib/Target/AMDGPU/AMDGPUUtil.cpp
@@ -0,0 +1,139 @@
+//===-- AMDGPUUtil.cpp - AMDGPU Utility functions -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Common utility functions used by hw codegen targets
+//
+//===----------------------------------------------------------------------===//
+
+#include "AMDGPUUtil.h"
+#include "AMDGPURegisterInfo.h"
+#include "AMDIL.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+
+using namespace llvm;
+
+// Some instructions act as place holders to emulate operations that the GPU
+// hardware does automatically. This function can be used to check if
+// an opcode falls into this category.
+bool AMDGPU::isPlaceHolderOpcode(unsigned opcode)
+{
+  switch (opcode) {
+  default: return false;
+  case AMDGPU::RETURN:
+  case AMDGPU::LOAD_INPUT:
+  case AMDGPU::LAST:
+  case AMDGPU::MASK_WRITE:
+  case AMDGPU::RESERVE_REG:
+    return true;
+  }
+}
+
+bool AMDGPU::isTransOp(unsigned opcode)
+{
+  switch(opcode) {
+    default: return false;
+
+    case AMDGPU::COS_r600:
+    case AMDGPU::COS_eg:
+    case AMDGPU::MULLIT:
+    case AMDGPU::MUL_LIT_r600:
+    case AMDGPU::MUL_LIT_eg:
+    case AMDGPU::EXP_IEEE_r600:
+    case AMDGPU::EXP_IEEE_eg:
+    case AMDGPU::LOG_CLAMPED_r600:
+    case AMDGPU::LOG_IEEE_r600:
+    case AMDGPU::LOG_CLAMPED_eg:
+    case AMDGPU::LOG_IEEE_eg:
+      return true;
+  }
+}
+
+bool AMDGPU::isTexOp(unsigned opcode)
+{
+  switch(opcode) {
+  default: return false;
+  case AMDGPU::TEX_LD:
+  case AMDGPU::TEX_GET_TEXTURE_RESINFO:
+  case AMDGPU::TEX_SAMPLE:
+  case AMDGPU::TEX_SAMPLE_C:
+  case AMDGPU::TEX_SAMPLE_L:
+  case AMDGPU::TEX_SAMPLE_C_L:
+  case AMDGPU::TEX_SAMPLE_LB:
+  case AMDGPU::TEX_SAMPLE_C_LB:
+  case AMDGPU::TEX_SAMPLE_G:
+  case AMDGPU::TEX_SAMPLE_C_G:
+  case AMDGPU::TEX_GET_GRADIENTS_H:
+  case AMDGPU::TEX_GET_GRADIENTS_V:
+  case AMDGPU::TEX_SET_GRADIENTS_H:
+  case AMDGPU::TEX_SET_GRADIENTS_V:
+    return true;
+  }
+}
+
+bool AMDGPU::isReductionOp(unsigned opcode)
+{
+  switch(opcode) {
+    default: return false;
+    case AMDGPU::DOT4_r600:
+    case AMDGPU::DOT4_eg:
+      return true;
+  }
+}
+
+bool AMDGPU::isCubeOp(unsigned opcode)
+{
+  switch(opcode) {
+    default: return false;
+    case AMDGPU::CUBE_r600:
+    case AMDGPU::CUBE_eg:
+      return true;
+  }
+}
+
+
+bool AMDGPU::isFCOp(unsigned opcode)
+{
+  switch(opcode) {
+  default: return false;
+  case AMDGPU::BREAK_LOGICALZ_f32:
+  case AMDGPU::BREAK_LOGICALNZ_i32:
+  case AMDGPU::BREAK_LOGICALZ_i32:
+  case AMDGPU::BREAK_LOGICALNZ_f32:
+  case AMDGPU::CONTINUE_LOGICALNZ_f32:
+  case AMDGPU::IF_LOGICALNZ_i32:
+  case AMDGPU::IF_LOGICALZ_f32:
+  case AMDGPU::ELSE:
+  case AMDGPU::ENDIF:
+  case AMDGPU::ENDLOOP:
+  case AMDGPU::IF_LOGICALNZ_f32:
+  case AMDGPU::WHILELOOP:
+    return true;
+  }
+}
+
+void AMDGPU::utilAddLiveIn(MachineFunction * MF,
+                           MachineRegisterInfo & MRI,
+                           const TargetInstrInfo * TII,
+                           unsigned physReg, unsigned virtReg)
+{
+    if (!MRI.isLiveIn(physReg)) {
+      MRI.addLiveIn(physReg, virtReg);
+      MF->front().addLiveIn(physReg);
+      BuildMI(MF->front(), MF->front().begin(), DebugLoc(),
+              TII->get(TargetOpcode::COPY), virtReg)
+                .addReg(physReg);
+    } else {
+      MRI.replaceRegWith(virtReg, MRI.getLiveInVirtReg(physReg));
+    }
+}