[NVPTX] Add isel patterns for addrspacecast

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204600 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 163 insertions, 0 deletions

diff --git a/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp b/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
index 6d1c160374..bd08d2d8ad 100644
--- a/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
+++ b/lib/Target/NVPTX/NVPTXISelDAGToDAG.cpp
@@ -162,6 +162,9 @@ SDNode *NVPTXDAGToDAGISel::Select(SDNode *N) {
   case NVPTXISD::StoreParamU32:
     ResNode = SelectStoreParam(N);
     break;
+  case ISD::ADDRSPACECAST:
+    ResNode = SelectAddrSpaceCast(N);
+    break;
   default:
     break;
   }
@@ -191,6 +194,66 @@ static unsigned int getCodeAddrSpace(MemSDNode *N,
   return NVPTX::PTXLdStInstCode::GENERIC;
 }
 
+SDNode *NVPTXDAGToDAGISel::SelectAddrSpaceCast(SDNode *N) {
+  SDValue Src = N->getOperand(0);
+  AddrSpaceCastSDNode *CastN = cast<AddrSpaceCastSDNode>(N);
+  unsigned SrcAddrSpace = CastN->getSrcAddressSpace();
+  unsigned DstAddrSpace = CastN->getDestAddressSpace();
+
+  assert(SrcAddrSpace != DstAddrSpace &&
+         "addrspacecast must be between different address spaces");
+
+  if (DstAddrSpace == ADDRESS_SPACE_GENERIC) {
+    // Specific to generic
+    unsigned Opc;
+    switch (SrcAddrSpace) {
+    default: report_fatal_error("Bad address space in addrspacecast");
+    case ADDRESS_SPACE_GLOBAL:
+      Opc = Subtarget.is64Bit() ? NVPTX::cvta_global_yes_64
+                                : NVPTX::cvta_global_yes;
+      break;
+    case ADDRESS_SPACE_SHARED:
+      Opc = Subtarget.is64Bit() ? NVPTX::cvta_shared_yes_64
+                                : NVPTX::cvta_shared_yes;
+      break;
+    case ADDRESS_SPACE_CONST:
+      Opc = Subtarget.is64Bit() ? NVPTX::cvta_const_yes_64
+                                : NVPTX::cvta_const_yes;
+      break;
+    case ADDRESS_SPACE_LOCAL:
+      Opc = Subtarget.is64Bit() ? NVPTX::cvta_local_yes_64
+                                : NVPTX::cvta_local_yes;
+      break;
+    }
+    return CurDAG->getMachineNode(Opc, SDLoc(N), N->getValueType(0), Src);
+  } else {
+    // Generic to specific
+    if (SrcAddrSpace != 0)
+      report_fatal_error("Cannot cast between two non-generic address spaces");
+    unsigned Opc;
+    switch (DstAddrSpace) {
+    default: report_fatal_error("Bad address space in addrspacecast");
+    case ADDRESS_SPACE_GLOBAL:
+      Opc = Subtarget.is64Bit() ? NVPTX::cvta_to_global_yes_64
+                                : NVPTX::cvta_to_global_yes;
+      break;
+    case ADDRESS_SPACE_SHARED:
+      Opc = Subtarget.is64Bit() ? NVPTX::cvta_to_shared_yes_64
+                                : NVPTX::cvta_to_shared_yes;
+      break;
+    case ADDRESS_SPACE_CONST:
+      Opc = Subtarget.is64Bit() ? NVPTX::cvta_to_const_yes_64
+                                : NVPTX::cvta_to_const_yes;
+      break;
+    case ADDRESS_SPACE_LOCAL:
+      Opc = Subtarget.is64Bit() ? NVPTX::cvta_to_local_yes_64
+                                : NVPTX::cvta_to_local_yes;
+      break;
+    }
+    return CurDAG->getMachineNode(Opc, SDLoc(N), N->getValueType(0), Src);
+  }
+}
+
 SDNode *NVPTXDAGToDAGISel::SelectLoad(SDNode *N) {
   SDLoc dl(N);
   LoadSDNode *LD = cast<LoadSDNode>(N);
diff --git a/lib/Target/NVPTX/NVPTXISelDAGToDAG.h b/lib/Target/NVPTX/NVPTXISelDAGToDAG.h
index a4a5abeb76..93ad16911b 100644
--- a/lib/Target/NVPTX/NVPTXISelDAGToDAG.h
+++ b/lib/Target/NVPTX/NVPTXISelDAGToDAG.h
@@ -67,6 +67,7 @@ private:
   SDNode *SelectLoadParam(SDNode *N);
   SDNode *SelectStoreRetval(SDNode *N);
   SDNode *SelectStoreParam(SDNode *N);
+  SDNode *SelectAddrSpaceCast(SDNode *N);
         
   inline SDValue getI32Imm(unsigned Imm) {
     return CurDAG->getTargetConstant(Imm, MVT::i32);
diff --git a/test/CodeGen/NVPTX/addrspacecast.ll b/test/CodeGen/NVPTX/addrspacecast.ll
new file mode 100644
index 0000000000..98ea655969
--- /dev/null
+++ b/test/CodeGen/NVPTX/addrspacecast.ll
@@ -0,0 +1,99 @@
+; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s -check-prefix=PTX32
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s -check-prefix=PTX64
+
+
+define i32 @conv1(i32 addrspace(1)* %ptr) {
+; PTX32: conv1
+; PTX32: cvta.global.u32
+; PTX32: ld.u32
+; PTX64: conv1
+; PTX64: cvta.global.u64
+; PTX64: ld.u32
+  %genptr = addrspacecast i32 addrspace(1)* %ptr to i32*
+  %val = load i32* %genptr
+  ret i32 %val
+}
+
+define i32 @conv2(i32 addrspace(3)* %ptr) {
+; PTX32: conv2
+; PTX32: cvta.shared.u32
+; PTX32: ld.u32
+; PTX64: conv2
+; PTX64: cvta.shared.u64
+; PTX64: ld.u32
+  %genptr = addrspacecast i32 addrspace(3)* %ptr to i32*
+  %val = load i32* %genptr
+  ret i32 %val
+}
+
+define i32 @conv3(i32 addrspace(4)* %ptr) {
+; PTX32: conv3
+; PTX32: cvta.const.u32
+; PTX32: ld.u32
+; PTX64: conv3
+; PTX64: cvta.const.u64
+; PTX64: ld.u32
+  %genptr = addrspacecast i32 addrspace(4)* %ptr to i32*
+  %val = load i32* %genptr
+  ret i32 %val
+}
+
+define i32 @conv4(i32 addrspace(5)* %ptr) {
+; PTX32: conv4
+; PTX32: cvta.local.u32
+; PTX32: ld.u32
+; PTX64: conv4
+; PTX64: cvta.local.u64
+; PTX64: ld.u32
+  %genptr = addrspacecast i32 addrspace(5)* %ptr to i32*
+  %val = load i32* %genptr
+  ret i32 %val
+}
+
+define i32 @conv5(i32* %ptr) {
+; PTX32: conv5
+; PTX32: cvta.to.global.u32
+; PTX32: ld.global.u32
+; PTX64: conv5
+; PTX64: cvta.to.global.u64
+; PTX64: ld.global.u32
+  %specptr = addrspacecast i32* %ptr to i32 addrspace(1)*
+  %val = load i32 addrspace(1)* %specptr
+  ret i32 %val
+}
+
+define i32 @conv6(i32* %ptr) {
+; PTX32: conv6
+; PTX32: cvta.to.shared.u32
+; PTX32: ld.shared.u32
+; PTX64: conv6
+; PTX64: cvta.to.shared.u64
+; PTX64: ld.shared.u32
+  %specptr = addrspacecast i32* %ptr to i32 addrspace(3)*
+  %val = load i32 addrspace(3)* %specptr
+  ret i32 %val
+}
+
+define i32 @conv7(i32* %ptr) {
+; PTX32: conv7
+; PTX32: cvta.to.const.u32
+; PTX32: ld.const.u32
+; PTX64: conv7
+; PTX64: cvta.to.const.u64
+; PTX64: ld.const.u32
+  %specptr = addrspacecast i32* %ptr to i32 addrspace(4)*
+  %val = load i32 addrspace(4)* %specptr
+  ret i32 %val
+}
+
+define i32 @conv8(i32* %ptr) {
+; PTX32: conv8
+; PTX32: cvta.to.local.u32
+; PTX32: ld.local.u32
+; PTX64: conv8
+; PTX64: cvta.to.local.u64
+; PTX64: ld.local.u32
+  %specptr = addrspacecast i32* %ptr to i32 addrspace(5)*
+  %val = load i32 addrspace(5)* %specptr
+  ret i32 %val
+}