PPC: Fix simulator.

src/ppc/simulator-ppc.cc

Index: src/ppc/simulator-ppc.cc
diff --git a/src/ppc/simulator-ppc.cc b/src/ppc/simulator-ppc.cc
index a4088a6b1e75816d9aa17fc41a04199f5c548267..75074317a6d258c1b0b60cf2336121fba3021ef9 100644
--- a/src/ppc/simulator-ppc.cc
+++ b/src/ppc/simulator-ppc.cc
@@ -1235,9 +1235,9 @@ void Simulator::SoftwareInterrupt(Instruction* instr) {
       const int kArgCount = 6;
       int arg0_regnum = 3;
       intptr_t result_buffer = 0;
-      if (redirection->type() == ExternalReference::BUILTIN_CALL_TRIPLE ||
-          (redirection->type() == ExternalReference::BUILTIN_CALL_PAIR &&
-           !ABI_RETURNS_OBJECT_PAIRS_IN_REGS)) {
+      bool uses_result_buffer =
+          redirection->type() == ExternalReference::BUILTIN_CALL_TRIPLE;
+      if (uses_result_buffer) {
         result_buffer = get_register(r3);
         arg0_regnum++;
       }