Index: lib/CodeGen/InlineSpiller.cpp
===================================================================
--- lib/CodeGen/InlineSpiller.cpp
+++ lib/CodeGen/InlineSpiller.cpp
@@ -568,6 +568,25 @@
     return true;
   }
 
+  // If the use instruction has more distinct register uses than there are
+  // physical registers, doing a remat wouldn't guarantee the result will be
+  // able to assignable.  Instead, we need to spill and fold the reload.
+  DenseMap<const TargetRegisterClass*, unsigned> Counts;
+  DenseSet<unsigned> PhysRegSeen;
+  for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
+    MachineOperand &MO = MI.getOperand(i);
+    if (!MO.isReg() || !MO.isUse())
+      continue;
+    const auto Reg = MO.getReg();
+    if (!TargetRegisterInfo::isVirtualRegister(Reg))
+      if (!PhysRegSeen.insert(Reg).second)
+        continue;
+    const auto RC = MRI.getRegClass(Reg);
+    Counts[RC]++;
+    if (Counts[RC] > RC->getNumRegs())
+      return false;
+  }
+
   // Allocate a new register for the remat.
   unsigned NewVReg = Edit->createFrom(Original);
 
Index: test/CodeGen/X86/statepoint-live-in.ll
===================================================================
--- test/CodeGen/X86/statepoint-live-in.ll
+++ test/CodeGen/X86/statepoint-live-in.ll
@@ -128,6 +128,42 @@
   ret void
 }
 
+; A variant of test7 where values are not directly foldable from stack slots.
+define void @test7(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h, i32 %i, i32 %j, i32 %k, i32 %l, i32 %m, i32 %n, i32 %o, i32 %p, i32 %q, i32 %r, i32 %s, i32 %t, i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z) gc "statepoint-example" {
+; The code for this is terrible, check simply for correctness for the moment
+; CHECK-LABEL: test7:
+; CHECK:    callq _bar
+entry:
+  %a64 = zext i32 %a to i64
+  %b64 = zext i32 %b to i64
+  %c64 = zext i32 %c to i64
+  %d64 = zext i32 %d to i64
+  %e64 = zext i32 %e to i64
+  %f64 = zext i32 %f to i64
+  %g64 = zext i32 %g to i64
+  %h64 = zext i32 %h to i64
+  %i64 = zext i32 %i to i64
+  %j64 = zext i32 %j to i64
+  %k64 = zext i32 %k to i64
+  %l64 = zext i32 %l to i64
+  %m64 = zext i32 %m to i64
+  %n64 = zext i32 %n to i64
+  %o64 = zext i32 %o to i64
+  %p64 = zext i32 %p to i64
+  %q64 = zext i32 %q to i64
+  %r64 = zext i32 %r to i64
+  %s64 = zext i32 %s to i64
+  %t64 = zext i32 %t to i64
+  %u64 = zext i32 %u to i64
+  %v64 = zext i32 %v to i64
+  %w64 = zext i32 %w to i64
+  %x64 = zext i32 %x to i64
+  %y64 = zext i32 %y to i64
+  %z64 = zext i32 %z to i64
+  %statepoint_token1 = call token (i64, i32, void ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_isVoidf(i64 2882400000, i32 0, void ()* @bar, i32 0, i32 2, i32 0, i32 26, i64 %a64, i64 %b64, i64 %c64, i64 %d64, i64 %e64, i64 %f64, i64 %g64, i64 %h64, i64 %i64, i64 %j64, i64 %k64, i64 %l64, i64 %m64, i64 %n64, i64 %o64, i64 %p64, i64 %q64, i64 %r64, i64 %s64, i64 %t64, i64 %u64, i64 %v64, i64 %w64, i64 %x64, i64 %y64, i64 %z64)
+  ret void
+}
+
 
 ; CHECK: Ltmp0-_test1
 ; CHECK:      .byte	1