PPC: Reland "Reland "[wasm][liftoff] Respect CallDescriptor linkage""

Port c2a1d633

Drive-by: port code-generator-s390.cc changes
Change-Id: I2090cf136d62cc9db1f17d158b88a1e58cc430d9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2740341Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#73273}

src/codegen/ppc/macro-assembler-ppc.h

@@ -119,6 +119,12 @@ class V8_EXPORT_PRIVATE TurboAssembler : public TurboAssemblerBase {
   // Returns the pc offset at which the frame ends.
   int LeaveFrame(StackFrame::Type type, int stack_adjustment = 0);
 
+  void AllocateStackSpace(int bytes) {
+    DCHECK_GE(bytes, 0);
+    if (bytes == 0) return;
+    Add(sp, sp, -bytes, r0);
+  }
+
   // Push a fixed frame, consisting of lr, fp, constant pool.
   void PushCommonFrame(Register marker_reg = no_reg);
 

src/compiler/backend/ppc/code-generator-ppc.cc

@@ -1735,10 +1735,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       // Slot-sized arguments are never padded but there may be a gap if
       // the slot allocator reclaimed other padding slots. Adjust the stack
       // here to skip any gap.
-      if (slots > pushed_slots) {
-        __ addi(sp, sp,
-                Operand(-((slots - pushed_slots) * kSystemPointerSize)));
-      }
+      __ AllocateStackSpace((slots - pushed_slots) * kSystemPointerSize);
       switch (rep) {
         case MachineRepresentation::kFloat32:
           __ StoreSingleU(i.InputDoubleRegister(1),
@@ -4076,10 +4073,8 @@ void CodeGenerator::AssembleConstructFrame() {
   }
 
   const int returns = frame()->GetReturnSlotCount();
-  if (returns != 0) {
-    // Create space for returns.
-    __ Add(sp, sp, -returns * kSystemPointerSize, r0);
-  }
+  // Create space for returns.
+  __ AllocateStackSpace(returns * kSystemPointerSize);
 }
 
 void CodeGenerator::AssembleReturn(InstructionOperand* additional_pop_count) {

src/compiler/backend/s390/code-generator-s390.cc

@@ -1973,10 +1973,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       // Slot-sized arguments are never padded but there may be a gap if
       // the slot allocator reclaimed other padding slots. Adjust the stack
       // here to skip any gap.
-      if (slots > pushed_slots) {
-        __ lay(sp,
-               MemOperand(sp, -((slots - pushed_slots) * kSystemPointerSize)));
-      }
+      __ AllocateStackSpace((slots - pushed_slots) * kSystemPointerSize);
       switch (rep) {
         case MachineRepresentation::kFloat32:
           __ lay(sp, MemOperand(sp, -kSystemPointerSize));
@@ -4397,10 +4394,8 @@ void CodeGenerator::AssembleConstructFrame() {
   }
 
   const int returns = frame()->GetReturnSlotCount();
-  if (returns != 0) {
-    // Create space for returns.
-    __ lay(sp, MemOperand(sp, -returns * kSystemPointerSize));
-  }
+  // Create space for returns.
+  __ AllocateStackSpace(returns * kSystemPointerSize);
 }
 
 void CodeGenerator::AssembleReturn(InstructionOperand* additional_pop_count) {

src/wasm/baseline/ppc/liftoff-assembler-ppc.h

@@ -1796,7 +1796,7 @@ void LiftoffAssembler::DeallocateStackSlot(uint32_t size) {
   bailout(kUnsupportedArchitecture, "DeallocateStackSlot");
 }
 
-void LiftoffStackSlots::Construct() {
+void LiftoffStackSlots::Construct(int param_slots) {
   asm_->bailout(kUnsupportedArchitecture, "LiftoffStackSlots::Construct");
 }