MIPS: Fixing illegal use of at register

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index 9ba814ae2ff85887350cd57c7d0cbe739834f1a1..a19fdc4b3a49f709199b080b751276d5740859bd 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -4939,10 +4939,10 @@ void MacroAssembler::LeaveExitFrame(bool save_doubles, Register argument_count,
   // Optionally restore all double registers.
   if (save_doubles) {
     // Remember: we only need to restore every 2nd double FPU value.
-    lw(t8, MemOperand(fp, ExitFrameConstants::kSPOffset));
+    lw(t9, MemOperand(fp, ExitFrameConstants::kSPOffset));
     for (int i = 0; i < FPURegister::kMaxNumRegisters; i+=2) {
       FPURegister reg = FPURegister::from_code(i);
-      ldc1(reg, MemOperand(t8, i  * kDoubleSize + kPointerSize));
+      ldc1(reg, MemOperand(t9, i * kDoubleSize + kPointerSize));
     }
   }