R600/SI: Remove SI_BUFFER_RSRC pseudo

Just use REG_SEQUENCE directly, so there are fewer
instructions to need to deal with later.

llvm-svn: 220056

3 files changed, 23 insertions, 42 deletions

diff --git a/llvm/lib/Target/R600/AMDGPUISelDAGToDAG.cpp b/llvm/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
index c7539716597..8a9340289d8 100644
--- a/llvm/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
+++ b/llvm/lib/Target/R600/AMDGPUISelDAGToDAG.cpp
@@ -944,21 +944,38 @@ bool AMDGPUDAGToDAGISel::SelectMUBUFAddr64(SDValue Addr, SDValue &SRsrc,
   return SelectMUBUFAddr64(Addr, SRsrc, VAddr, Offset);
 }
 
+static SDValue buildSMovImm32(SelectionDAG *DAG, SDLoc DL, uint64_t Val) {
+  SDValue K = DAG->getTargetConstant(Val, MVT::i32);
+  return SDValue(DAG->getMachineNode(AMDGPU::S_MOV_B32, DL, MVT::i32, K), 0);
+}
+
 static SDValue buildRSRC(SelectionDAG *DAG, SDLoc DL, SDValue Ptr,
                          uint32_t RsrcDword1, uint64_t RsrcDword2And3) {
 
   SDValue PtrLo = DAG->getTargetExtractSubreg(AMDGPU::sub0, DL, MVT::i32, Ptr);
   SDValue PtrHi = DAG->getTargetExtractSubreg(AMDGPU::sub1, DL, MVT::i32, Ptr);
-  if (RsrcDword1)
+  if (RsrcDword1) {
     PtrHi = SDValue(DAG->getMachineNode(AMDGPU::S_OR_B32, DL, MVT::i32, PtrHi,
                                     DAG->getConstant(RsrcDword1, MVT::i32)), 0);
+  }
 
-  SDValue DataLo = DAG->getTargetConstant(
-      RsrcDword2And3 & APInt::getAllOnesValue(32).getZExtValue(), MVT::i32);
-  SDValue DataHi = DAG->getTargetConstant(RsrcDword2And3 >> 32, MVT::i32);
+  SDValue DataLo = buildSMovImm32(DAG, DL,
+                                  RsrcDword2And3 & UINT64_C(0xFFFFFFFF));
+  SDValue DataHi = buildSMovImm32(DAG, DL, RsrcDword2And3 >> 32);
+
+  const SDValue Ops[] = {
+    DAG->getTargetConstant(AMDGPU::SReg_128RegClassID, MVT::i32),
+    PtrLo,
+    DAG->getTargetConstant(AMDGPU::sub0, MVT::i32),
+    PtrHi,
+    DAG->getTargetConstant(AMDGPU::sub1, MVT::i32),
+    DataLo,
+    DAG->getTargetConstant(AMDGPU::sub2, MVT::i32),
+    DataHi,
+    DAG->getTargetConstant(AMDGPU::sub3, MVT::i32)
+  };
 
-  const SDValue Ops[] = { PtrLo, PtrHi, DataLo, DataHi };
-  return SDValue(DAG->getMachineNode(AMDGPU::SI_BUFFER_RSRC, DL,
+  return SDValue(DAG->getMachineNode(AMDGPU::REG_SEQUENCE, DL,
                                      MVT::v4i32, Ops), 0);
 }
 
diff --git a/llvm/lib/Target/R600/SIISelLowering.cpp b/llvm/lib/Target/R600/SIISelLowering.cpp
index 28881955156..dc9153d3e91 100644
--- a/llvm/lib/Target/R600/SIISelLowering.cpp
+++ b/llvm/lib/Target/R600/SIISelLowering.cpp
@@ -623,36 +623,6 @@ MachineBasicBlock * SITargetLowering::EmitInstrWithCustomInserter(
     MI->eraseFromParent();
     break;
   }
-  case AMDGPU::SI_BUFFER_RSRC: {
-    unsigned SuperReg = MI->getOperand(0).getReg();
-    unsigned Args[4];
-    for (unsigned i = 0, e = 4; i < e; ++i) {
-      MachineOperand &Arg = MI->getOperand(i + 1);
-
-      if (Arg.isReg()) {
-        Args[i] = Arg.getReg();
-        continue;
-      }
-
-      assert(Arg.isImm());
-      unsigned Reg = MRI.createVirtualRegister(&AMDGPU::SGPR_32RegClass);
-      BuildMI(*BB, I, MI->getDebugLoc(), TII->get(AMDGPU::S_MOV_B32), Reg)
-              .addImm(Arg.getImm());
-      Args[i] = Reg;
-    }
-    BuildMI(*BB, I, MI->getDebugLoc(), TII->get(AMDGPU::REG_SEQUENCE),
-            SuperReg)
-            .addReg(Args[0])
-            .addImm(AMDGPU::sub0)
-            .addReg(Args[1])
-            .addImm(AMDGPU::sub1)
-            .addReg(Args[2])
-            .addImm(AMDGPU::sub2)
-            .addReg(Args[3])
-            .addImm(AMDGPU::sub3);
-    MI->eraseFromParent();
-    break;
-  }
   case AMDGPU::V_SUB_F64: {
     unsigned DestReg = MI->getOperand(0).getReg();
     BuildMI(*BB, I, MI->getDebugLoc(), TII->get(AMDGPU::V_ADD_F64), DestReg)
diff --git a/llvm/lib/Target/R600/SIInstructions.td b/llvm/lib/Target/R600/SIInstructions.td
index 1b94c2b9c5a..6e4321d7c67 100644
--- a/llvm/lib/Target/R600/SIInstructions.td
+++ b/llvm/lib/Target/R600/SIInstructions.td
@@ -1794,12 +1794,6 @@ def SI_ADDR64_RSRC : InstSI <
   "", []
 >;
 
-def SI_BUFFER_RSRC : InstSI <
-  (outs SReg_128:$srsrc),
-  (ins SReg_32:$ptr_lo, SReg_32:$ptr_hi, SSrc_32:$data_lo, SSrc_32:$data_hi),
-  "", []
->;
-
 def V_SUB_F64 : InstSI <
   (outs VReg_64:$dst),
   (ins VReg_64:$src0, VReg_64:$src1),