[ia32][wasm] Support AVX instructions for I32x4Splat/ReplaceLane/ExtractLane

src/compiler/ia32/instruction-selector-ia32.cc

Index: src/compiler/ia32/instruction-selector-ia32.cc
diff --git a/src/compiler/ia32/instruction-selector-ia32.cc b/src/compiler/ia32/instruction-selector-ia32.cc
index dccfced9e1da2596d7cede9bcfae121f3deae243..1c48a7cd66d26a054744e36ad5a9767ff35d28fa 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -1918,10 +1918,16 @@ void InstructionSelector::VisitI32x4ExtractLane(Node* node) {
 
 void InstructionSelector::VisitI32x4ReplaceLane(Node* node) {
   IA32OperandGenerator g(this);
-  int32_t lane = OpParameter<int32_t>(node);
-  Emit(kIA32I32x4ReplaceLane, g.DefineSameAsFirst(node),
-       g.UseRegister(node->InputAt(0)), g.UseImmediate(lane),
-       g.Use(node->InputAt(1)));
+  InstructionOperand operand0 = g.UseRegister(node->InputAt(0));
+  InstructionOperand operand1 = g.UseImmediate(OpParameter<int32_t>(node));
+  InstructionOperand operand2 = g.Use(node->InputAt(1));
+  if (IsSupported(AVX)) {
+    Emit(kAVXI32x4ReplaceLane, g.DefineAsRegister(node), operand0, operand1,
+         operand2);
+  } else {
+    Emit(kSSEI32x4ReplaceLane, g.DefineSameAsFirst(node), operand0, operand1,
+         operand2);
+  }
 }
 
 void InstructionSelector::VisitInt32AbsWithOverflow(Node* node) {