X87: [compiler] Add relocatable pointer constants for wasm memory references.

  port 52148c41 (r35407)

  original commit message:
  Add relocatable pointers for wasm memory references that need to be updated when wasm GrowMemory is used. Code generator changes to accept relocatable constants as immediates.

BUG=

Review URL: https://codereview.chromium.org/1895673002

Cr-Commit-Position: refs/heads/master@{#35556}

src/compiler/x87/code-generator-x87.cc

@@ -59,6 +59,11 @@ class X87OperandConverter : public InstructionOperandConverter {
 
   Immediate ToImmediate(InstructionOperand* operand) {
     Constant constant = ToConstant(operand);
+    if (constant.type() == Constant::kInt32 &&
+        constant.rmode() == RelocInfo::WASM_MEMORY_REFERENCE) {
+      return Immediate(reinterpret_cast<Address>(constant.ToInt32()),
+                       constant.rmode());
+    }
     switch (constant.type()) {
       case Constant::kInt32:
         return Immediate(constant.ToInt32());

src/compiler/x87/instruction-selector-x87.cc

@@ -60,6 +60,8 @@ class X87OperandGenerator final : public OperandGenerator {
       case IrOpcode::kInt32Constant:
       case IrOpcode::kNumberConstant:
       case IrOpcode::kExternalConstant:
+      case IrOpcode::kRelocatableInt32Constant:
+      case IrOpcode::kRelocatableInt64Constant:
         return true;
       case IrOpcode::kHeapConstant: {
         // Constants in new space cannot be used as immediates in V8 because