[backend] Add proper Label::kNear hints

This saves some bytes here and there. Whenever the label is bound just a
few instructions after, we can use a near jump.

R=ahaas@chromium.org

Bug: v8:10005
Change-Id: If2ec596575e1bd88d09fde3fa96ffa8187de542f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1930898Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65145}

src/compiler/backend/ia32/code-generator-ia32.cc

@@ -641,7 +641,7 @@ void CodeGenerator::BailoutIfDeoptimized() {
   __ pop(eax);  // Restore eax.
 
   Label skip;
-  __ j(zero, &skip);
+  __ j(zero, &skip, Label::kNear);
   __ Jump(BUILTIN_CODE(isolate(), CompileLazyDeoptimizedCode),
           RelocInfo::CODE_TARGET);
   __ bind(&skip);
@@ -4365,7 +4365,7 @@ void CodeGenerator::AssembleArchTrap(Instruction* instr,
   Label* tlabel = ool->entry();
   Label end;
   if (condition == kUnorderedEqual) {
-    __ j(parity_even, &end);
+    __ j(parity_even, &end, Label::kNear);
   } else if (condition == kUnorderedNotEqual) {
     __ j(parity_even, tlabel);
   }
@@ -4667,7 +4667,7 @@ void CodeGenerator::AssembleConstructFrame() {
         __ add(scratch, Immediate(required_slots * kSystemPointerSize));
         __ cmp(esp, scratch);
         __ pop(scratch);
-        __ j(above_equal, &done);
+        __ j(above_equal, &done, Label::kNear);
       }
 
       __ wasm_call(wasm::WasmCode::kWasmStackOverflow,

src/compiler/backend/x64/code-generator-x64.cc

@@ -1627,13 +1627,13 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
           __ Ucomiss(kScratchDoubleReg, i.InputOperand(0));
         }
         // If the input is NaN, then the conversion fails.
-        __ j(parity_even, &fail);
+        __ j(parity_even, &fail, Label::kNear);
         // If the input is INT64_MIN, then the conversion succeeds.
-        __ j(equal, &done);
+        __ j(equal, &done, Label::kNear);
         __ cmpq(i.OutputRegister(0), Immediate(1));
         // If the conversion results in INT64_MIN, but the input was not
         // INT64_MIN, then the conversion fails.
-        __ j(no_overflow, &done);
+        __ j(no_overflow, &done, Label::kNear);
         __ bind(&fail);
         __ Set(i.OutputRegister(1), 0);
         __ bind(&done);
@@ -1656,13 +1656,13 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
           __ Ucomisd(kScratchDoubleReg, i.InputOperand(0));
         }
         // If the input is NaN, then the conversion fails.
-        __ j(parity_even, &fail);
+        __ j(parity_even, &fail, Label::kNear);
         // If the input is INT64_MIN, then the conversion succeeds.
-        __ j(equal, &done);
+        __ j(equal, &done, Label::kNear);
         __ cmpq(i.OutputRegister(0), Immediate(1));
         // If the conversion results in INT64_MIN, but the input was not
         // INT64_MIN, then the conversion fails.
-        __ j(no_overflow, &done);
+        __ j(no_overflow, &done, Label::kNear);
         __ bind(&fail);
         __ Set(i.OutputRegister(1), 0);
         __ bind(&done);
@@ -4230,7 +4230,7 @@ void CodeGenerator::AssembleArchDeoptBranch(Instruction* instr,
     __ pushq(rax);
     __ load_rax(counter);
     __ decl(rax);
-    __ j(not_zero, &nodeopt);
+    __ j(not_zero, &nodeopt, Label::kNear);
 
     __ Set(rax, FLAG_deopt_every_n_times);
     __ store_rax(counter);
@@ -4259,7 +4259,7 @@ void CodeGenerator::AssembleArchTrap(Instruction* instr,
   Label* tlabel = ool->entry();
   Label end;
   if (condition == kUnorderedEqual) {
-    __ j(parity_even, &end);
+    __ j(parity_even, &end, Label::kNear);
   } else if (condition == kUnorderedNotEqual) {
     __ j(parity_even, tlabel);
   }
@@ -4443,7 +4443,7 @@ void CodeGenerator::AssembleConstructFrame() {
         __ addq(kScratchRegister,
                 Immediate(required_slots * kSystemPointerSize));
         __ cmpq(rsp, kScratchRegister);
-        __ j(above_equal, &done);
+        __ j(above_equal, &done, Label::kNear);
       }
 
       __ near_call(wasm::WasmCode::kWasmStackOverflow,