[liftoff] Remove redundant method (FillInstanceInto)

On all platform, the method is implemented identical to
{LoadInstanceFromFrame}. So remove {FillInstanceInto} and keep
{LoadInstanceFromFrame} which is a better name.

R=thibaudm@chromium.org

Bug: v8:12425
Change-Id: Ia9e6a3e2478628f8d31ff4faaab8d5250fda7796
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3429203Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78924}

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

@@ -636,10 +636,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  ldr(dst, liftoff::GetInstanceOperand());
-}
-
 namespace liftoff {
 #define __ lasm->
 inline void LoadInternal(LiftoffAssembler* lasm, LiftoffRegister dst,

src/wasm/baseline/arm64/liftoff-assembler-arm64.h

@@ -468,10 +468,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  Ldr(dst, liftoff::GetInstanceOperand());
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,

src/wasm/baseline/ia32/liftoff-assembler-ia32.h

@@ -383,10 +383,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  mov(dst, liftoff::GetInstanceOperand());
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,

src/wasm/baseline/liftoff-assembler.cc

@@ -1059,7 +1059,7 @@ void LiftoffAssembler::PrepareCall(const ValueKindSig* sig,
 
   // Reload the instance from the stack.
   if (!target_instance) {
-    FillInstanceInto(instance_reg);
+    LoadInstanceFromFrame(instance_reg);
   }
 }
 

src/wasm/baseline/liftoff-assembler.h

@@ -705,7 +705,6 @@ class LiftoffAssembler : public TurboAssembler {
                                   Register isolate_root);
   inline void SpillInstance(Register instance);
   inline void ResetOSRTarget();
-  inline void FillInstanceInto(Register dst);
   inline void LoadTaggedPointer(Register dst, Register src_addr,
                                 Register offset_reg, int32_t offset_imm,
                                 LiftoffRegList pinned);

src/wasm/baseline/liftoff-compiler.cc

@@ -4853,7 +4853,7 @@ class LiftoffCompiler {
     LiftoffRegister dst = pinned.set(PopMemTypeToRegister(pinned));
 
     Register instance = pinned.set(__ GetUnusedRegister(kGpReg, pinned)).gp();
-    __ FillInstanceInto(instance);
+    __ LoadInstanceFromFrame(instance);
 
     LiftoffRegister segment_index =
         pinned.set(__ GetUnusedRegister(kGpReg, pinned));
@@ -4902,7 +4902,7 @@ class LiftoffCompiler {
     LiftoffRegister src = pinned.set(PopMemTypeToRegister(pinned));
     LiftoffRegister dst = pinned.set(PopMemTypeToRegister(pinned));
     Register instance = pinned.set(__ GetUnusedRegister(kGpReg, pinned)).gp();
-    __ FillInstanceInto(instance);
+    __ LoadInstanceFromFrame(instance);
     ExternalReference ext_ref = ExternalReference::wasm_memory_copy();
     auto sig = MakeSig::Returns(kI32).Params(kPointerKind, kPointerKind,
                                              kPointerKind, kPointerKind);
@@ -4925,7 +4925,7 @@ class LiftoffCompiler {
     LiftoffRegister dst = pinned.set(PopMemTypeToRegister(pinned));
 
     Register instance = pinned.set(__ GetUnusedRegister(kGpReg, pinned)).gp();
-    __ FillInstanceInto(instance);
+    __ LoadInstanceFromFrame(instance);
     ExternalReference ext_ref = ExternalReference::wasm_memory_fill();
     auto sig = MakeSig::Returns(kI32).Params(kPointerKind, kPointerKind, kI32,
                                              kPointerKind);

src/wasm/baseline/loong64/liftoff-assembler-loong64.h

@@ -364,10 +364,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  Ld_d(dst, liftoff::GetInstanceOperand());
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,

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

@@ -495,10 +495,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  lw(dst, liftoff::GetInstanceOperand());
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,

src/wasm/baseline/mips64/liftoff-assembler-mips64.h

@@ -480,10 +480,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  Ld(dst, liftoff::GetInstanceOperand());
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,

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

@@ -300,10 +300,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  LoadU64(dst, liftoff::GetInstanceOperand(), r0);
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,

src/wasm/baseline/riscv64/liftoff-assembler-riscv64.h

@@ -473,10 +473,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  Ld(dst, liftoff::GetInstanceOperand());
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,

src/wasm/baseline/s390/liftoff-assembler-s390.h

@@ -277,10 +277,6 @@ void LiftoffAssembler::SpillInstance(Register instance) {
 
 void LiftoffAssembler::ResetOSRTarget() {}
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  LoadU64(dst, liftoff::GetInstanceOperand());
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,

src/wasm/baseline/x64/liftoff-assembler-x64.h

@@ -373,10 +373,6 @@ void LiftoffAssembler::ResetOSRTarget() {
   movq(liftoff::GetOSRTargetSlot(), Immediate(0));
 }
 
-void LiftoffAssembler::FillInstanceInto(Register dst) {
-  movq(dst, liftoff::GetInstanceOperand());
-}
-
 void LiftoffAssembler::LoadTaggedPointer(Register dst, Register src_addr,
                                          Register offset_reg,
                                          int32_t offset_imm,