PPC/s390: Check for overflow when SubI IntMin

src/crankshaft/ppc/lithium-codegen-ppc.cc

Index: src/crankshaft/ppc/lithium-codegen-ppc.cc
diff --git a/src/crankshaft/ppc/lithium-codegen-ppc.cc b/src/crankshaft/ppc/lithium-codegen-ppc.cc
index ddacd2badf15026fd85c6fb9ce88781bd882522a..96debd9d24b0158a37a9f6ae04c654742e7f25e0 100644
--- a/src/crankshaft/ppc/lithium-codegen-ppc.cc
+++ b/src/crankshaft/ppc/lithium-codegen-ppc.cc
@@ -1707,12 +1707,15 @@ void LCodeGen::DoSubI(LSubI* instr) {
     } else {
       __ sub(result, left, EmitLoadRegister(right, ip));
     }
-#if V8_TARGET_ARCH_PPC64
     if (can_overflow) {
+#if V8_TARGET_ARCH_PPC64
       __ 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()),