MIPS: Fix 'Port [turbofan] Introduce integer multiplication with overflow.'

src/mips/macro-assembler-mips.cc

 // Copyright 2012 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 <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
@@ skipping 5630 matching lines @@
   DCHECK(overflow_label || no_overflow_label);
   Register overflow_dst = t9;
   DCHECK(!dst.is(scratch));
   DCHECK(!dst.is(overflow_dst));
   DCHECK(!scratch.is(overflow_dst));
   DCHECK(!overflow_dst.is(left));
   DCHECK(!overflow_dst.is(right));
   DCHECK(!scratch.is(left));
   DCHECK(!scratch.is(right));
 
-  Mul(overflow_dst, dst, left, right);
-  sra(scratch, dst, 31);
-  xor_(overflow_dst, overflow_dst, scratch);
+  if (IsMipsArchVariant(kMips32r6) && dst.is(right)) {
+    mov(scratch, right);
+    Mul(overflow_dst, dst, left, scratch);
+    sra(scratch, dst, 31);
+    xor_(overflow_dst, overflow_dst, scratch);
+  } else {
+    Mul(overflow_dst, dst, left, right);
+    sra(scratch, dst, 31);
+    xor_(overflow_dst, overflow_dst, scratch);
+  }
 
   BranchOvfHelperMult(this, overflow_dst, overflow_label, no_overflow_label);
 }
 
 void MacroAssembler::CallRuntime(const Runtime::Function* f, int num_arguments,
                                  SaveFPRegsMode save_doubles,
                                  BranchDelaySlot bd) {
   // All parameters are on the stack. v0 has the return value after call.
 
   // If the expected number of arguments of the runtime function is
@@ skipping 1317 matching lines @@
   if (mag.shift > 0) sra(result, result, mag.shift);
   srl(at, dividend, 31);
   Addu(result, result, Operand(at));
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS