Index: lib/Target/NVPTX/NVPTXInstrInfo.td
===================================================================
--- lib/Target/NVPTX/NVPTXInstrInfo.td
+++ lib/Target/NVPTX/NVPTXInstrInfo.td
@@ -1826,6 +1826,7 @@
                 "\t[func_retval0+$a], {{$val, $val2, $val3, $val4}};"),
                 []>;
 
+let isCall = 1 in {
 def PrintCallRetInst1 : NVPTXInst<(outs), (ins),
 "call (retval0), ",
                                 [(PrintCall (i32 1))]>;
@@ -1883,6 +1884,7 @@
 
 def PrintCallUniNoRetInst : NVPTXInst<(outs), (ins), "call.uni ",
                                 [(PrintCallUni (i32 0))]>;
+} // call instructions
 
 def LoadParamMemI64    : LoadParamMemInst<Int64Regs, ".b64">;
 def LoadParamMemI32    : LoadParamMemInst<Int32Regs, ".b32">;
Index: test/CodeGen/NVPTX/MachineSink-call.ll
===================================================================
--- /dev/null
+++ test/CodeGen/NVPTX/MachineSink-call.ll
@@ -0,0 +1,23 @@
+; RUN: llc < %s | FileCheck %s
+target triple = "nvptx64-nvidia-cuda"
+
+declare void @foo()
+
+; Load a value, then call a function.  Branch, and use the loaded value only on
+; one side of the branch.  The load shouldn't be sunk beneath the call, because
+; the call may modify memory.
+define i32 @f(i32 %x, i32* %ptr, i1 %cond) {
+Start:
+  ; CHECK: ld.u32
+  %ptr_val = load i32, i32* %ptr
+  ; CHECK: call.uni
+  call void @foo()
+  br i1 %cond, label %L1, label %L2
+L1:
+  %ptr_val2 = add i32 %ptr_val, 100
+  br label %L2
+L2:
+  %v4 = phi i32 [ %x, %Start ], [ %ptr_val2, %L1 ]
+  %v5 = add i32 %v4, 1000
+  ret i32 %v5
+}