Index: llvm/include/llvm/IR/IntrinsicsNVVM.td
===================================================================
--- llvm/include/llvm/IR/IntrinsicsNVVM.td
+++ llvm/include/llvm/IR/IntrinsicsNVVM.td
@@ -276,6 +276,26 @@
   );
 }
 
+class SHFL_INFO<bit sync, string mode, string type, bit return_pred> {
+  string Suffix = !if(sync, "sync_", "")
+                  # mode # "_"
+                  # type
+                  # !if(return_pred, "p", "");
+
+  string Name = "int_nvvm_shfl_" # Suffix;
+  string Builtin = "__nvvm_shfl_" # Suffix;
+  string IntrName = "llvm.nvvm.shfl." # !subst("_",".", Suffix);
+  list<int> withGccBuiltin = !if(return_pred, [], [1]);
+  list<int> withoutGccBuiltin = !if(return_pred, [1], []);
+  LLVMType OpType = !cond(
+    !eq(type,"i32"): llvm_i32_ty,
+    !eq(type,"f32"): llvm_float_ty);
+  list<LLVMType> RetTy = !if(return_pred, [OpType, llvm_i1_ty], [OpType]);
+  list<LLVMType> ArgsTy = !if(sync,
+    [llvm_i32_ty, OpType, llvm_i32_ty, llvm_i32_ty],
+    [OpType, llvm_i32_ty, llvm_i32_ty]);
+}
+
 let TargetPrefix = "nvvm" in {
   def int_nvvm_prmt : GCCBuiltin<"__nvvm_prmt">,
       Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
@@ -3955,90 +3975,27 @@
 //
 // SHUFFLE
 //
-
-// shfl.down.b32 dest, val, offset, mask_and_clamp
-def int_nvvm_shfl_down_i32 :
-  Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.down.i32">,
-  GCCBuiltin<"__nvvm_shfl_down_i32">;
-def int_nvvm_shfl_down_f32 :
-  Intrinsic<[llvm_float_ty], [llvm_float_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.down.f32">,
-  GCCBuiltin<"__nvvm_shfl_down_f32">;
-
-// shfl.up.b32 dest, val, offset, mask_and_clamp
-def int_nvvm_shfl_up_i32 :
-  Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.up.i32">,
-  GCCBuiltin<"__nvvm_shfl_up_i32">;
-def int_nvvm_shfl_up_f32 :
-  Intrinsic<[llvm_float_ty], [llvm_float_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.up.f32">,
-  GCCBuiltin<"__nvvm_shfl_up_f32">;
-
-// shfl.bfly.b32 dest, val, offset, mask_and_clamp
-def int_nvvm_shfl_bfly_i32 :
-  Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.bfly.i32">,
-  GCCBuiltin<"__nvvm_shfl_bfly_i32">;
-def int_nvvm_shfl_bfly_f32 :
-  Intrinsic<[llvm_float_ty], [llvm_float_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.bfly.f32">,
-  GCCBuiltin<"__nvvm_shfl_bfly_f32">;
-
-// shfl.idx.b32 dest, val, lane, mask_and_clamp
-def int_nvvm_shfl_idx_i32 :
-  Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.idx.i32">,
-  GCCBuiltin<"__nvvm_shfl_idx_i32">;
-def int_nvvm_shfl_idx_f32 :
-  Intrinsic<[llvm_float_ty], [llvm_float_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.idx.f32">,
-  GCCBuiltin<"__nvvm_shfl_idx_f32">;
-
-// Synchronizing shfl variants available in CUDA-9.
-// On sm_70 these don't have to be convergent, so we may eventually want to
-// implement non-convergent variant of this intrinsic.
-
-// shfl.sync.down.b32 dest, threadmask, val, offset , mask_and_clamp
-def int_nvvm_shfl_sync_down_i32 :
-  Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.sync.down.i32">,
-  GCCBuiltin<"__nvvm_shfl_sync_down_i32">;
-def int_nvvm_shfl_sync_down_f32 :
-  Intrinsic<[llvm_float_ty], [llvm_i32_ty, llvm_float_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.sync.down.f32">,
-  GCCBuiltin<"__nvvm_shfl_sync_down_f32">;
-
-// shfl.sync.up.b32 dest, threadmask, val, offset, mask_and_clamp
-def int_nvvm_shfl_sync_up_i32 :
-  Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.sync.up.i32">,
-  GCCBuiltin<"__nvvm_shfl_sync_up_i32">;
-def int_nvvm_shfl_sync_up_f32 :
-  Intrinsic<[llvm_float_ty], [llvm_i32_ty, llvm_float_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.sync.up.f32">,
-  GCCBuiltin<"__nvvm_shfl_sync_up_f32">;
-
-// shfl.sync.bfly.b32 dest, threadmask, val, offset, mask_and_clamp
-def int_nvvm_shfl_sync_bfly_i32 :
-  Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.sync.bfly.i32">,
-  GCCBuiltin<"__nvvm_shfl_sync_bfly_i32">;
-def int_nvvm_shfl_sync_bfly_f32 :
-  Intrinsic<[llvm_float_ty], [llvm_i32_ty, llvm_float_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.sync.bfly.f32">,
-  GCCBuiltin<"__nvvm_shfl_sync_bfly_f32">;
-
-// shfl.sync.idx.b32 dest, threadmask, val, lane, mask_and_clamp
-def int_nvvm_shfl_sync_idx_i32 :
-  Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.sync.idx.i32">,
-  GCCBuiltin<"__nvvm_shfl_sync_idx_i32">;
-def int_nvvm_shfl_sync_idx_f32 :
-  Intrinsic<[llvm_float_ty], [llvm_i32_ty, llvm_float_ty, llvm_i32_ty, llvm_i32_ty],
-            [IntrInaccessibleMemOnly, IntrConvergent], "llvm.nvvm.shfl.sync.idx.f32">,
-  GCCBuiltin<"__nvvm_shfl_sync_idx_f32">;
+// Generate intrinsics for all variants of shfl instruction.
+foreach sync = [0, 1] in {
+  foreach mode = ["up", "down", "bfly", "idx"] in {
+    foreach type = ["i32", "f32"] in {
+      foreach return_pred = [0, 1] in {
+        foreach i = [SHFL_INFO<sync, mode, type, return_pred>] in {
+          foreach _ = i.withGccBuiltin in {
+            def i.Name : GCCBuiltin<i.Builtin>,
+                         Intrinsic<i.RetTy, i.ArgsTy,
+                                   [IntrInaccessibleMemOnly, IntrConvergent],
+                                   i.IntrName>;
+          }
+          foreach _ = i.withoutGccBuiltin in {
+            def i.Name : Intrinsic<i.RetTy, i.ArgsTy,
+                         [IntrInaccessibleMemOnly, IntrConvergent], i.IntrName>;
+          }
+        }
+      }
+    }
+  }
+}
 
 //
 // VOTE
Index: llvm/lib/Target/NVPTX/NVPTXInstrInfo.td
===================================================================
--- llvm/lib/Target/NVPTX/NVPTXInstrInfo.td
+++ llvm/lib/Target/NVPTX/NVPTXInstrInfo.td
@@ -143,12 +143,17 @@
 def hasPTX60 : Predicate<"Subtarget->getPTXVersion() >= 60">;
 def hasPTX61 : Predicate<"Subtarget->getPTXVersion() >= 61">;
 def hasPTX63 : Predicate<"Subtarget->getPTXVersion() >= 63">;
+def hasPTX64 : Predicate<"Subtarget->getPTXVersion() >= 64">;
 
 def hasSM30 : Predicate<"Subtarget->getSmVersion() >= 30">;
 def hasSM70 : Predicate<"Subtarget->getSmVersion() >= 70">;
 def hasSM72 : Predicate<"Subtarget->getSmVersion() >= 72">;
 def hasSM75 : Predicate<"Subtarget->getSmVersion() >= 75">;
 
+// non-sync shfl instructions are not available on sm_70+ in PTX6.4+
+def hasSHFL : Predicate<"!(Subtarget->getSmVersion() >= 70" 
+                          "&& Subtarget->getPTXVersion() >= 64)">;
+
 def useShortPtr : Predicate<"useShortPointers()">;
 def useFP16Math: Predicate<"Subtarget->allowFP16Math()">;
 
Index: llvm/lib/Target/NVPTX/NVPTXIntrinsics.td
===================================================================
--- llvm/lib/Target/NVPTX/NVPTXIntrinsics.td
+++ llvm/lib/Target/NVPTX/NVPTXIntrinsics.td
@@ -56,6 +56,10 @@
                             []);
 }
 
+class THREADMASK_INFO<bit sync> {
+  list<bit> ret = !if(sync, [0,1], [0]);
+}
+
 //-----------------------------------
 // Synchronization and shuffle functions
 //-----------------------------------
@@ -129,121 +133,64 @@
                  [(int_nvvm_barrier_sync_cnt imm:$id, imm:$cnt)]>,
         Requires<[hasPTX60, hasSM30]>;
 
-
-// shfl.{up,down,bfly,idx}.b32
-multiclass SHFL<NVPTXRegClass regclass, string mode, Intrinsic IntOp> {
-  // The last two parameters to shfl can be regs or imms.  ptxas is smart
-  // enough to inline constant registers, so strictly speaking we don't need to
-  // handle immediates here.  But it's easy enough, and it makes our ptx more
-  // readable.
-  def reg : NVPTXInst<
-      (outs regclass:$dst),
-      (ins regclass:$src, Int32Regs:$offset, Int32Regs:$mask),
-      !strconcat("shfl.", mode, ".b32 $dst, $src, $offset, $mask;"),
-      [(set regclass:$dst, (IntOp regclass:$src, Int32Regs:$offset, Int32Regs:$mask))]>;
-
-  def imm1 : NVPTXInst<
-      (outs regclass:$dst),
-      (ins regclass:$src, i32imm:$offset, Int32Regs:$mask),
-      !strconcat("shfl.", mode, ".b32 $dst, $src, $offset, $mask;"),
-      [(set regclass:$dst, (IntOp regclass:$src, imm:$offset, Int32Regs:$mask))]>;
-
-  def imm2 : NVPTXInst<
-      (outs regclass:$dst),
-      (ins regclass:$src, Int32Regs:$offset, i32imm:$mask),
-      !strconcat("shfl.", mode, ".b32 $dst, $src, $offset, $mask;"),
-      [(set regclass:$dst, (IntOp regclass:$src, Int32Regs:$offset, imm:$mask))]>;
-
-  def imm3 : NVPTXInst<
-      (outs regclass:$dst),
-      (ins regclass:$src, i32imm:$offset, i32imm:$mask),
-      !strconcat("shfl.", mode, ".b32 $dst, $src, $offset, $mask;"),
-      [(set regclass:$dst, (IntOp regclass:$src, imm:$offset, imm:$mask))]>;
+class SHFL_INSTR<bit sync, string mode, string reg, bit return_pred,
+                 bit offset_imm, bit mask_imm, bit threadmask_imm>
+      : NVPTXInst<(outs), (ins), "?", []> {
+  NVPTXRegClass rc = !cond(
+    !eq(reg, "i32"): Int32Regs,
+    !eq(reg, "f32"): Float32Regs);
+  string IntrName = "int_nvvm_shfl_"
+                    # !if(sync, "sync_", "")
+                    # mode
+                    # "_" # reg
+                    # !if(return_pred, "p", "");
+  Intrinsic Intr = !cast<Intrinsic>(IntrName);
+  let InOperandList = !con(
+    !if(sync,
+        !dag(ins, !if(threadmask_imm, [i32imm], [Int32Regs]), ["threadmask"]),
+        (ins)),
+    (ins rc:$src),
+    !dag(ins, !if(offset_imm, [i32imm], [Int32Regs]), ["offset"]),
+    !dag(ins, !if(mask_imm, [i32imm], [Int32Regs]), ["mask"])
+    );
+  let OutOperandList = !if(return_pred, (outs rc:$dst, Int1Regs:$pred), (outs rc:$dst));
+  let AsmString = "shfl."
+     # !if(sync, "sync.", "")
+     # mode # ".b32\t"
+     # "$dst"
+     # !if(return_pred, "|$pred", "") # ", "
+     # "$src, $offset, $mask"
+     # !if(sync, ", $threadmask", "")
+     # ";"
+     ;
+  let Pattern = [!con(
+      !foreach(tmp, OutOperandList,
+             !subst(outs, set,
+             !subst(i32imm, imm, tmp))),
+      (set !foreach(tmp, InOperandList,
+             !subst(ins, Intr,
+             !subst(i32imm, imm, tmp))))
+  )];
 }
 
-defm INT_SHFL_DOWN_I32 : SHFL<Int32Regs, "down", int_nvvm_shfl_down_i32>;
-defm INT_SHFL_DOWN_F32 : SHFL<Float32Regs, "down", int_nvvm_shfl_down_f32>;
-defm INT_SHFL_UP_I32 : SHFL<Int32Regs, "up", int_nvvm_shfl_up_i32>;
-defm INT_SHFL_UP_F32 : SHFL<Float32Regs, "up", int_nvvm_shfl_up_f32>;
-defm INT_SHFL_BFLY_I32 : SHFL<Int32Regs, "bfly", int_nvvm_shfl_bfly_i32>;
-defm INT_SHFL_BFLY_F32 : SHFL<Float32Regs, "bfly", int_nvvm_shfl_bfly_f32>;
-defm INT_SHFL_IDX_I32 : SHFL<Int32Regs, "idx", int_nvvm_shfl_idx_i32>;
-defm INT_SHFL_IDX_F32 : SHFL<Float32Regs, "idx", int_nvvm_shfl_idx_f32>;
-
-multiclass SHFL_SYNC<NVPTXRegClass regclass, string mode, Intrinsic IntOp> {
-  // Threadmask and the last two parameters to shfl.sync can be regs or imms.
-  // ptxas is smart enough to inline constant registers, so strictly speaking we
-  // don't need to handle immediates here.  But it's easy enough, and it makes
-  // our ptx more readable.
-  def rrr : NVPTXInst<
-      (outs regclass:$dst),
-      (ins Int32Regs:$threadmask, regclass:$src, Int32Regs:$offset, Int32Regs:$mask),
-      !strconcat("shfl.sync.", mode, ".b32 $dst, $src, $offset, $mask, $threadmask;"),
-      [(set regclass:$dst, (IntOp Int32Regs:$threadmask, regclass:$src,
-                            Int32Regs:$offset, Int32Regs:$mask))]>;
-
-  def rri : NVPTXInst<
-      (outs regclass:$dst),
-      (ins Int32Regs:$threadmask, regclass:$src, Int32Regs:$offset, i32imm:$mask),
-      !strconcat("shfl.sync.", mode, ".b32 $dst, $src, $offset, $mask, $threadmask;"),
-      [(set regclass:$dst, (IntOp Int32Regs:$threadmask, regclass:$src,
-                            Int32Regs:$offset, imm:$mask))]>;
-
-  def rir : NVPTXInst<
-      (outs regclass:$dst),
-      (ins Int32Regs:$threadmask, regclass:$src, i32imm:$offset, Int32Regs:$mask),
-      !strconcat("shfl.sync.", mode, ".b32 $dst, $src, $offset, $mask, $threadmask;"),
-      [(set regclass:$dst, (IntOp Int32Regs:$threadmask, regclass:$src,
-                            imm:$offset, Int32Regs:$mask))]>;
-
-  def rii : NVPTXInst<
-      (outs regclass:$dst),
-      (ins Int32Regs:$threadmask, regclass:$src, i32imm:$offset, i32imm:$mask),
-      !strconcat("shfl.sync.", mode, ".b32 $dst, $src, $offset, $mask, $threadmask;"),
-      [(set regclass:$dst, (IntOp Int32Regs:$threadmask, regclass:$src,
-                            imm:$offset, imm:$mask))]>;
-
-  def irr : NVPTXInst<
-      (outs regclass:$dst),
-      (ins i32imm:$threadmask, regclass:$src, Int32Regs:$offset, Int32Regs:$mask),
-      !strconcat("shfl.sync.", mode, ".b32 $dst, $src, $offset, $mask, $threadmask;"),
-      [(set regclass:$dst, (IntOp imm:$threadmask, regclass:$src,
-                            Int32Regs:$offset, Int32Regs:$mask))]>;
-
-  def iri : NVPTXInst<
-      (outs regclass:$dst),
-      (ins i32imm:$threadmask, regclass:$src, Int32Regs:$offset, i32imm:$mask),
-      !strconcat("shfl.sync.", mode, ".b32 $dst, $src, $offset, $mask, $threadmask;"),
-      [(set regclass:$dst, (IntOp imm:$threadmask, regclass:$src,
-                            Int32Regs:$offset, imm:$mask))]>;
-
-  def iir : NVPTXInst<
-      (outs regclass:$dst),
-      (ins i32imm:$threadmask, regclass:$src, i32imm:$offset, Int32Regs:$mask),
-      !strconcat("shfl.sync.", mode, ".b32 $dst, $src, $offset, $mask, $threadmask;"),
-      [(set regclass:$dst, (IntOp imm:$threadmask, regclass:$src,
-                            imm:$offset, Int32Regs:$mask))]>;
-
-  def iii : NVPTXInst<
-      (outs regclass:$dst),
-      (ins i32imm:$threadmask, regclass:$src, i32imm:$offset, i32imm:$mask),
-      !strconcat("shfl.sync.", mode, ".b32 $dst, $src, $offset, $mask, $threadmask;"),
-      [(set regclass:$dst, (IntOp imm:$threadmask, regclass:$src,
-                            imm:$offset, imm:$mask))]>;
+foreach sync = [0, 1] in {
+  foreach mode = ["up", "down", "bfly", "idx"] in {
+    foreach regclass = ["i32", "f32"] in {
+      foreach return_pred = [0, 1] in {
+        foreach offset_imm = [0, 1] in {
+          foreach mask_imm = [0, 1] in {
+            foreach threadmask_imm = THREADMASK_INFO<sync>.ret in {
+              def : SHFL_INSTR<sync, mode, regclass, return_pred,
+                               offset_imm, mask_imm, threadmask_imm>,
+                    Requires<!if(sync, [hasSM30], [hasSM30, hasSHFL])>;
+            }
+          }
+        }
+      }
+    }
+  }
 }
 
-// On sm_70 these don't have to be convergent, so we may eventually want to
-// implement non-convergent variant of this intrinsic.
-defm INT_SHFL_SYNC_DOWN_I32 : SHFL_SYNC<Int32Regs, "down", int_nvvm_shfl_sync_down_i32>;
-defm INT_SHFL_SYNC_DOWN_F32 : SHFL_SYNC<Float32Regs, "down", int_nvvm_shfl_sync_down_f32>;
-defm INT_SHFL_SYNC_UP_I32 : SHFL_SYNC<Int32Regs, "up", int_nvvm_shfl_sync_up_i32>;
-defm INT_SHFL_SYNC_UP_F32 : SHFL_SYNC<Float32Regs, "up", int_nvvm_shfl_sync_up_f32>;
-defm INT_SHFL_SYNC_BFLY_I32 : SHFL_SYNC<Int32Regs, "bfly", int_nvvm_shfl_sync_bfly_i32>;
-defm INT_SHFL_SYNC_BFLY_F32 : SHFL_SYNC<Float32Regs, "bfly", int_nvvm_shfl_sync_bfly_f32>;
-defm INT_SHFL_SYNC_IDX_I32 : SHFL_SYNC<Int32Regs, "idx", int_nvvm_shfl_sync_idx_i32>;
-defm INT_SHFL_SYNC_IDX_F32 : SHFL_SYNC<Float32Regs, "idx", int_nvvm_shfl_sync_idx_f32>;
-
-
 // vote.{all,any,uni,ballot}
 multiclass VOTE<NVPTXRegClass regclass, string mode, Intrinsic IntOp> {
   def : NVPTXInst<(outs regclass:$dest), (ins Int1Regs:$pred),
Index: llvm/test/CodeGen/NVPTX/shfl-p.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/NVPTX/shfl-p.ll
@@ -0,0 +1,172 @@
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_30 | FileCheck %s
+
+declare {i32, i1} @llvm.nvvm.shfl.down.i32p(i32, i32, i32)
+declare {float, i1} @llvm.nvvm.shfl.down.f32p(float, i32, i32)
+declare {i32, i1} @llvm.nvvm.shfl.up.i32p(i32, i32, i32)
+declare {float, i1} @llvm.nvvm.shfl.up.f32p(float, i32, i32)
+declare {i32, i1} @llvm.nvvm.shfl.bfly.i32p(i32, i32, i32)
+declare {float, i1} @llvm.nvvm.shfl.bfly.f32p(float, i32, i32)
+declare {i32, i1} @llvm.nvvm.shfl.idx.i32p(i32, i32, i32)
+declare {float, i1} @llvm.nvvm.shfl.idx.f32p(float, i32, i32)
+
+; CHECK-LABEL: .func{{.*}}shfl.i32.rrr
+define {i32, i1} @shfl.i32.rrr(i32 %a, i32 %b, i32 %c) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], [[C]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.down.i32p(i32 %a, i32 %b, i32 %c)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.i32.irr
+define {i32, i1} @shfl.i32.irr(i32 %a, i32 %b, i32 %c) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], [[C]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.down.i32p(i32 %a, i32 %b, i32 %c)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.i32.rri
+define {i32, i1} @shfl.i32.rri(i32 %a, i32 %b) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.down.i32p(i32 %a, i32 %b, i32 1)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.i32.iri
+define {i32, i1} @shfl.i32.iri(i32 %a, i32 %b) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], 2;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.down.i32p(i32 %a, i32 %b, i32 2)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.i32.rir
+define {i32, i1} @shfl.i32.rir(i32 %a, i32 %c) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 1, [[C]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.down.i32p(i32 %a, i32 1, i32 %c)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.i32.iir
+define {i32, i1} @shfl.i32.iir(i32 %a, i32 %c) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 2, [[C]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.down.i32p(i32 %a, i32 2, i32 %c)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.i32.rii
+define {i32, i1} @shfl.i32.rii(i32 %a) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 1, 2;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.down.i32p(i32 %a, i32 1, i32 2)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.i32.iii
+define {i32, i1} @shfl.i32.iii(i32 %a, i32 %b) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 2, 3;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.down.i32p(i32 %a, i32 2, i32 3)
+  ret {i32, i1} %val
+}
+
+;; Same intrinsics, but for float
+
+; CHECK-LABEL: .func{{.*}}shfl.f32.rrr
+define {float, i1} @shfl.f32.rrr(float %a, i32 %b, i32 %c) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], [[C]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.down.f32p(float %a, i32 %b, i32 %c)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.f32.irr
+define {float, i1} @shfl.f32.irr(float %a, i32 %b, i32 %c) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], [[C]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.down.f32p(float %a, i32 %b, i32 %c)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.f32.rri
+define {float, i1} @shfl.f32.rri(float %a, i32 %b) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.down.f32p(float %a, i32 %b, i32 1)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.f32.iri
+define {float, i1} @shfl.f32.iri(float %a, i32 %b) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], 2;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.down.f32p(float %a, i32 %b, i32 2)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.f32.rir
+define {float, i1} @shfl.f32.rir(float %a, i32 %c) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 1, [[C]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.down.f32p(float %a, i32 1, i32 %c)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.f32.iir
+define {float, i1} @shfl.f32.iir(float %a, i32 %c) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 2, [[C]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.down.f32p(float %a, i32 2, i32 %c)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.f32.rii
+define {float, i1} @shfl.f32.rii(float %a) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 1, 2;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.down.f32p(float %a, i32 1, i32 2)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.f32.iii
+define {float, i1} @shfl.f32.iii(float %a, i32 %b) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: shfl.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 2, 3;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.down.f32p(float %a, i32 2, i32 3)
+  ret {float, i1} %val
+}
Index: llvm/test/CodeGen/NVPTX/shfl-sync-p.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/NVPTX/shfl-sync-p.ll
@@ -0,0 +1,180 @@
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_30 | FileCheck %s
+
+declare {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32, i32, i32, i32)
+declare {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32, float, i32, i32)
+declare {i32, i1} @llvm.nvvm.shfl.sync.up.i32p(i32, i32, i32, i32)
+declare {float, i1} @llvm.nvvm.shfl.sync.up.f32p(i32, float, i32, i32)
+declare {i32, i1} @llvm.nvvm.shfl.sync.bfly.i32p(i32, i32, i32, i32)
+declare {float, i1} @llvm.nvvm.shfl.sync.bfly.f32p(i32, float, i32, i32)
+declare {i32, i1} @llvm.nvvm.shfl.sync.idx.i32p(i32, i32, i32, i32)
+declare {float, i1} @llvm.nvvm.shfl.sync.idx.f32p(i32, float, i32, i32)
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.i32.rrr
+define {i32, i1} @shfl.sync.i32.rrr(i32 %mask, i32 %a, i32 %b, i32 %c) {
+  ; CHECK: ld.param.u32 [[MASK:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], [[C]], [[MASK]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32 %mask, i32 %a, i32 %b, i32 %c)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.i32.irr
+define {i32, i1} @shfl.sync.i32.irr(i32 %a, i32 %b, i32 %c) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], [[C]], 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32 1, i32 %a, i32 %b, i32 %c)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.i32.rri
+define {i32, i1} @shfl.sync.i32.rri(i32 %mask, i32 %a, i32 %b) {
+  ; CHECK: ld.param.u32 [[MASK:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], 1, [[MASK]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32 %mask, i32 %a, i32 %b, i32 1)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.i32.iri
+define {i32, i1} @shfl.sync.i32.iri(i32 %a, i32 %b) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], 2, 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32 1, i32 %a, i32 %b, i32 2)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.i32.rir
+define {i32, i1} @shfl.sync.i32.rir(i32 %mask, i32 %a, i32 %c) {
+  ; CHECK: ld.param.u32 [[MASK:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 1, [[C]], [[MASK]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32 %mask, i32 %a, i32 1, i32 %c)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.i32.iir
+define {i32, i1} @shfl.sync.i32.iir(i32 %a, i32 %c) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 2, [[C]], 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32 1, i32 %a, i32 2, i32 %c)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.i32.rii
+define {i32, i1} @shfl.sync.i32.rii(i32 %mask, i32 %a) {
+  ; CHECK: ld.param.u32 [[MASK:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 1, 2, [[MASK]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32 %mask, i32 %a, i32 1, i32 2)
+  ret {i32, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.i32.iii
+define {i32, i1} @shfl.sync.i32.iii(i32 %a, i32 %b) {
+  ; CHECK: ld.param.u32 [[A:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%r[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 2, 3, 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {i32, i1} @llvm.nvvm.shfl.sync.down.i32p(i32 1, i32 %a, i32 2, i32 3)
+  ret {i32, i1} %val
+}
+
+;; Same intrinsics, but for float
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.f32.rrr
+define {float, i1} @shfl.sync.f32.rrr(i32 %mask, float %a, i32 %b, i32 %c) {
+  ; CHECK: ld.param.u32 [[MASK:%r[0-9]+]]
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], [[C]], [[MASK]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32 %mask, float %a, i32 %b, i32 %c)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.f32.irr
+define {float, i1} @shfl.sync.f32.irr(float %a, i32 %b, i32 %c) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], [[C]], 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32 1, float %a, i32 %b, i32 %c)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.f32.rri
+define {float, i1} @shfl.sync.f32.rri(i32 %mask, float %a, i32 %b) {
+  ; CHECK: ld.param.u32 [[MASK:%r[0-9]+]]
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], 1, [[MASK]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32 %mask, float %a, i32 %b, i32 1)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.f32.iri
+define {float, i1} @shfl.sync.f32.iri(float %a, i32 %b) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[B:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], [[B]], 2, 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32 1, float %a, i32 %b, i32 2)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.f32.rir
+define {float, i1} @shfl.sync.f32.rir(i32 %mask, float %a, i32 %c) {
+  ; CHECK: ld.param.u32 [[MASK:%r[0-9]+]]
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 1, [[C]], [[MASK]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32 %mask, float %a, i32 1, i32 %c)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.f32.iir
+define {float, i1} @shfl.sync.f32.iir(float %a, i32 %c) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: ld.param.u32 [[C:%r[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 2, [[C]], 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32 1, float %a, i32 2, i32 %c)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.f32.rii
+define {float, i1} @shfl.sync.f32.rii(i32 %mask, float %a) {
+  ; CHECK: ld.param.u32 [[MASK:%r[0-9]+]]
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 1, 2, [[MASK]];
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32 %mask, float %a, i32 1, i32 2)
+  ret {float, i1} %val
+}
+
+; CHECK-LABEL: .func{{.*}}shfl.sync.f32.iii
+define {float, i1} @shfl.sync.f32.iii(float %a, i32 %b) {
+  ; CHECK: ld.param.f32 [[A:%f[0-9]+]]
+  ; CHECK: shfl.sync.down.b32 [[OUT:%f[0-9]+]]|[[OUTP:%p[0-9]+]], [[A]], 2, 3, 1;
+  ; CHECK: st.param.{{.}}32 {{.*}}, [[OUT]]
+  %val = call {float, i1} @llvm.nvvm.shfl.sync.down.f32p(i32 1, float %a, i32 2, i32 3)
+  ret {float, i1} %val
+}