[crankshaft] HCallWithDescriptor is now able to pass arguments on the stack.

src/crankshaft/s390/lithium-s390.cc

Index: src/crankshaft/s390/lithium-s390.cc
diff --git a/src/crankshaft/s390/lithium-s390.cc b/src/crankshaft/s390/lithium-s390.cc
index 44bf00be40139cb260a20e9ecff882f077fee241..bf9dfd56bae04409eeb7dd009fda5f9f7dc65c4b 100644
--- a/src/crankshaft/s390/lithium-s390.cc
+++ b/src/crankshaft/s390/lithium-s390.cc
@@ -921,6 +921,9 @@ LInstruction* LChunkBuilder::DoDeclareGlobals(HDeclareGlobals* instr) {
 
 LInstruction* LChunkBuilder::DoCallWithDescriptor(HCallWithDescriptor* instr) {
   CallInterfaceDescriptor descriptor = instr->descriptor();
+  DCHECK_EQ(descriptor.GetParameterCount() +
+                LCallWithDescriptor::kImplicitRegisterParameterCount,
+            instr->OperandCount());
 
   LOperand* target = UseRegisterOrConstantAtStart(instr->target());
   ZoneList<LOperand*> ops(instr->OperandCount(), zone());
@@ -929,15 +932,20 @@ LInstruction* LChunkBuilder::DoCallWithDescriptor(HCallWithDescriptor* instr) {
   // Context
   LOperand* op = UseFixed(instr->OperandAt(1), cp);
   ops.Add(op, zone());
-  // Other register parameters
-  for (int i = LCallWithDescriptor::kImplicitRegisterParameterCount;
-       i < instr->OperandCount(); i++) {
-    op =
-        UseFixed(instr->OperandAt(i),
-                 descriptor.GetRegisterParameter(
-                     i - LCallWithDescriptor::kImplicitRegisterParameterCount));
+  // Load register parameters.
+  int i = 0;
+  for (; i < descriptor.GetRegisterParameterCount(); i++) {
+    op = UseFixed(instr->OperandAt(
+                      i + LCallWithDescriptor::kImplicitRegisterParameterCount),
+                  descriptor.GetRegisterParameter(i));
     ops.Add(op, zone());
   }
+  // Push stack parameters.
+  for (; i < descriptor.GetParameterCount(); i++) {
+    op = UseAny(instr->OperandAt(
+        i + LCallWithDescriptor::kImplicitRegisterParameterCount));
+    AddInstruction(new (zone()) LPushArgument(op), instr);
+  }
 
   LCallWithDescriptor* result =
       new (zone()) LCallWithDescriptor(descriptor, ops, zone());