src/cpu/x86/vm/c1_LinearScan_x86.hpp

@@ -83,12 +83,18 @@
 #ifndef PRODUCT
         if (TraceLinearScanLevel >= 2) {
           tty->print_cr("killing XMMs for trig");
         }
 #endif
+        int num_caller_save_xmm_regs = FrameMap::nof_caller_save_xmm_regs;
+#if _LP64
+        if (UseAVX < 3) {
+          num_caller_save_xmm_regs = num_caller_save_xmm_regs / 2;
+        }
+#endif
         int op_id = op->id();
-        for (int xmm = 0; xmm < FrameMap::nof_caller_save_xmm_regs; xmm++) {
+        for (int xmm = 0; xmm < num_caller_save_xmm_regs; xmm++) {
           LIR_Opr opr = FrameMap::caller_save_xmm_reg_at(xmm);
           add_temp(reg_num(opr), op_id, noUse, T_ILLEGAL);
         }
       }
       break;

@@ -98,18 +104,22 @@
 
 
 // Implementation of LinearScanWalker
 
 inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {
+  int last_xmm_reg = pd_last_xmm_reg;
+  if (UseAVX < 3) {
+    last_xmm_reg = pd_first_xmm_reg + (pd_nof_xmm_regs_frame_map / 2) - 1;
+  }
   if (allocator()->gen()->is_vreg_flag_set(cur->reg_num(), LIRGenerator::byte_reg)) {
     assert(cur->type() != T_FLOAT && cur->type() != T_DOUBLE, "cpu regs only");
     _first_reg = pd_first_byte_reg;
     _last_reg = FrameMap::last_byte_reg();
     return true;
   } else if ((UseSSE >= 1 && cur->type() == T_FLOAT) || (UseSSE >= 2 && cur->type() == T_DOUBLE)) {
     _first_reg = pd_first_xmm_reg;
-    _last_reg = pd_last_xmm_reg;
+    _last_reg = last_xmm_reg;
     return true;
   }
 
   return false;
 }