[mips] Fix kWasmInstanceOffset and clear an unused test

Fix a offset error, this is related to
commit 38fb1487

Delete cctest/test-run-machops/StackSlotAlignment, this is
related to commit a58f812c

Change-Id: I3ef1b96d8a3bdba530200cbac4f7a062496ace59
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2994813Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Commit-Queue: Zhao Jiazhong <zhaojiazhong-hf@loongson.cn>
Auto-Submit: Liu yu <liuyu@loongson.cn>
Cr-Commit-Position: refs/heads/master@{#75493}

src/builtins/mips/builtins-mips.cc

@@ -1176,7 +1176,7 @@ void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) {
 //   o ra: return address
 //
 // The function builds an interpreter frame.  See InterpreterFrameConstants in
-// frames.h for its layout.
+// frame-constants.h for its layout.
 void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   Register closure = a1;
   Register feedback_vector = a2;

src/builtins/mips64/builtins-mips64.cc

@@ -1188,7 +1188,7 @@ void Builtins::Generate_BaselineOutOfLinePrologue(MacroAssembler* masm) {
 //   o ra: return address
 //
 // The function builds an interpreter frame.  See InterpreterFrameConstants in
-// frames.h for its layout.
+// frame-constants.h for its layout.
 void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   Register closure = a1;
   Register feedback_vector = a2;

src/execution/mips64/frame-constants-mips64.h

@@ -27,8 +27,7 @@ class WasmCompileLazyFrameConstants : public TypedFrameConstants {
 
   // FP-relative.
   // See Generate_WasmCompileLazy in builtins-mips64.cc.
-  static constexpr int kWasmInstanceOffset =
-      TYPED_FRAME_PUSHED_VALUE_OFFSET(kNumberOfSavedAllParamRegs);
+  static constexpr int kWasmInstanceOffset = TYPED_FRAME_PUSHED_VALUE_OFFSET(6);
 
   static constexpr int kFixedFrameSizeFromFp =
       TypedFrameConstants::kFixedFrameSizeFromFp +

test/cctest/compiler/test-run-machops.cc

@@ -7208,34 +7208,6 @@ TEST(ParentFramePointer) {
   CHECK_EQ(1, r.Call(1));
 }
 
-#if V8_HOST_ARCH_MIPS || V8_HOST_ARCH_MIPS64
-
-TEST(StackSlotAlignment) {
-  RawMachineAssemblerTester<int32_t> r;
-  RawMachineLabel tlabel;
-  RawMachineLabel flabel;
-  RawMachineLabel merge;
-
-  int alignments[] = {4, 8, 16};
-  int alignment_count = arraysize(alignments);
-
-  Node* alignment_counter = r.Int32Constant(0);
-  for (int i = 0; i < alignment_count; i++) {
-    for (int j = 0; j < 5; j++) {
-      Node* stack_slot =
-          r.StackSlot(MachineRepresentation::kWord32, alignments[i]);
-      alignment_counter = r.Int32Add(
-          alignment_counter,
-          r.Word32And(stack_slot, r.Int32Constant(alignments[i] - 1)));
-    }
-  }
-
-  r.Return(alignment_counter);
-  CHECK_EQ(0, r.Call());
-}
-
-#endif  // V8_HOST_ARCH_MIPS || V8_HOST_ARCH_MIPS64
-
 #if V8_TARGET_ARCH_64_BIT
 
 TEST(Regression5923) {