PPC/s390: Check for overflow when SubI IntMin

src/crankshaft/ppc/lithium-codegen-ppc.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/crankshaft/ppc/lithium-codegen-ppc.h"
 
 #include "src/base/bits.h"
 #include "src/builtins/builtins-constructor.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 1689 matching lines @@
   const bool isInteger = !instr->hydrogen()->representation().IsSmi();
 #else
   const bool isInteger = false;
 #endif
   if (!can_overflow || isInteger) {
     if (right->IsConstantOperand()) {
       __ Add(result, left, -(ToOperand(right).immediate()), r0);
     } else {
       __ sub(result, left, EmitLoadRegister(right, ip));
     }
+    if (can_overflow) {
 #if V8_TARGET_ARCH_PPC64
-    if (can_overflow) {
       __ TestIfInt32(result, r0);
+#else
+      __ TestIfInt32(scratch0(), result, r0);
+#endif
       DeoptimizeIf(ne, instr, DeoptimizeReason::kOverflow);
     }
-#endif
+
   } else {
     if (right->IsConstantOperand()) {
       __ AddAndCheckForOverflow(result, left, -(ToOperand(right).immediate()),
                                 scratch0(), r0);
     } else {
       __ SubAndCheckForOverflow(result, left, EmitLoadRegister(right, ip),
                                 scratch0(), r0);
     }
     DeoptimizeIf(lt, instr, DeoptimizeReason::kOverflow, cr0);
   }
@@ skipping 3911 matching lines @@
   __ LoadP(result,
            FieldMemOperand(scratch, FixedArray::kHeaderSize - kPointerSize));
   __ bind(deferred->exit());
   __ bind(&done);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8