MIPS: [turbofan] Make Int32Div and Uint32Div safe.

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

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/osr.h"
@@ skipping 630 matching lines @@
       __ Mul(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
     case kMipsMulHigh:
       __ Mulh(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
     case kMipsMulHighU:
       __ Mulhu(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
     case kMipsDiv:
       __ Div(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
+      if (IsMipsArchVariant(kMips32r6)) {
+        __ seleqz(i.OutputRegister(), i.InputRegister(0), i.InputRegister(0));
+      } else {
+        __ Movz(i.OutputRegister(), i.InputRegister(1), i.InputRegister(1));
+      }
       break;
     case kMipsDivU:
       __ Divu(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
+      if (IsMipsArchVariant(kMips32r6)) {
+        __ seleqz(i.OutputRegister(), i.InputRegister(0), i.InputRegister(0));
+      } else {
+        __ Movz(i.OutputRegister(), i.InputRegister(1), i.InputRegister(1));
+      }
       break;
     case kMipsMod:
       __ Mod(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
     case kMipsModU:
       __ Modu(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
     case kMipsAnd:
       __ And(i.OutputRegister(), i.InputRegister(0), i.InputOperand(1));
       break;
@@ skipping 987 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8