MIPS: [turbofan] Make Int32Div and Uint32Div safe.

src/compiler/mips64/instruction-selector-mips64.cc

Index: src/compiler/mips64/instruction-selector-mips64.cc
diff --git a/src/compiler/mips64/instruction-selector-mips64.cc b/src/compiler/mips64/instruction-selector-mips64.cc
index a254ea27681fdee8e913300b8336494e375bc368..b84a053e8515ab0b6a66e0ceab68c3daaaee44f3 100644
--- a/src/compiler/mips64/instruction-selector-mips64.cc
+++ b/src/compiler/mips64/instruction-selector-mips64.cc
@@ -671,7 +671,7 @@ void InstructionSelector::VisitInt32Div(Node* node) {
       }
     }
   }
-  Emit(kMips64Div, g.DefineAsRegister(node), g.UseRegister(m.left().node()),
+  Emit(kMips64Div, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()),
        g.UseRegister(m.right().node()));
 }
 
@@ -679,7 +679,7 @@ void InstructionSelector::VisitInt32Div(Node* node) {
 void InstructionSelector::VisitUint32Div(Node* node) {
   Mips64OperandGenerator g(this);
   Int32BinopMatcher m(node);
-  Emit(kMips64DivU, g.DefineAsRegister(node), g.UseRegister(m.left().node()),
+  Emit(kMips64DivU, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()),
        g.UseRegister(m.right().node()));
 }
 
@@ -718,7 +718,7 @@ void InstructionSelector::VisitUint32Mod(Node* node) {
 void InstructionSelector::VisitInt64Div(Node* node) {
   Mips64OperandGenerator g(this);
   Int64BinopMatcher m(node);
-  Emit(kMips64Ddiv, g.DefineAsRegister(node), g.UseRegister(m.left().node()),
+  Emit(kMips64Ddiv, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()),
        g.UseRegister(m.right().node()));
 }
 
@@ -726,7 +726,7 @@ void InstructionSelector::VisitInt64Div(Node* node) {
 void InstructionSelector::VisitUint64Div(Node* node) {
   Mips64OperandGenerator g(this);
   Int64BinopMatcher m(node);
-  Emit(kMips64DdivU, g.DefineAsRegister(node), g.UseRegister(m.left().node()),
+  Emit(kMips64DdivU, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()),
        g.UseRegister(m.right().node()));
 }
 
@@ -1653,6 +1653,8 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   return MachineOperatorBuilder::kWord32ShiftIsSafe |
+         MachineOperatorBuilder::kInt32DivIsSafe |
+         MachineOperatorBuilder::kUint32DivIsSafe |
          MachineOperatorBuilder::kFloat64Min |
          MachineOperatorBuilder::kFloat64Max |
          MachineOperatorBuilder::kFloat32Min |