MIPS: [turbofan] Make Int32Div and Uint32Div safe.

src/compiler/mips64/code-generator-mips64.cc

Index: src/compiler/mips64/code-generator-mips64.cc
diff --git a/src/compiler/mips64/code-generator-mips64.cc b/src/compiler/mips64/code-generator-mips64.cc
index 692ab98f9953e77cf6908fac9c8cdae714efa561..e9d5ce81a059180ba245c09640e1f739920f2f06 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -646,9 +646,19 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       break;
     case kMips64Div:
       __ Div(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
+      if (kArchVariant == kMips64r6) {
+        __ seleqz(i.OutputRegister(), i.InputRegister(0), i.InputRegister(0));
+      } else {
+        __ Movz(i.OutputRegister(), i.InputRegister(1), i.InputRegister(1));
+      }
       break;
     case kMips64DivU:
       __ Divu(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
+      if (kArchVariant == kMips64r6) {
+        __ seleqz(i.OutputRegister(), i.InputRegister(0), i.InputRegister(0));
+      } else {
+        __ Movz(i.OutputRegister(), i.InputRegister(1), i.InputRegister(1));
+      }
       break;
     case kMips64Mod:
       __ Mod(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
@@ -661,9 +671,19 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       break;
     case kMips64Ddiv:
       __ Ddiv(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
+      if (kArchVariant == kMips64r6) {
+        __ seleqz(i.OutputRegister(), i.InputRegister(0), i.InputRegister(0));
+      } else {
+        __ Movz(i.OutputRegister(), i.InputRegister(1), i.InputRegister(1));
+      }
       break;
     case kMips64DdivU:
       __ Ddivu(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
+      if (kArchVariant == kMips64r6) {
+        __ seleqz(i.OutputRegister(), i.InputRegister(0), i.InputRegister(0));
+      } else {
+        __ Movz(i.OutputRegister(), i.InputRegister(1), i.InputRegister(1));
+      }
       break;
     case kMips64Dmod:
       __ Dmod(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));