8256220: C1: x86_32 fails with -XX:UseSSE=1 after JDK-8210764 due to mishandled lir_neg

Reviewed-by: chagedorn

Author: shipilev

src/hotspot/cpu/x86/c1_LinearScan_x86.cpp

@@ -550,21 +550,6 @@ void FpuStackAllocator::handle_op1(LIR_Op1* op1) {
       break;
     }
 
-    case lir_neg: {
-      if (in->is_fpu_register() && !in->is_xmm_register()) {
-        assert(res->is_fpu_register() && !res->is_xmm_register(), "must be");
-        assert(in->is_last_use(), "old value gets destroyed");
-
-        insert_free_if_dead(res, in);
-        insert_exchange(in);
-        new_in = to_fpu_stack_top(in);
-
-        do_rename(in, res);
-        new_res = to_fpu_stack_top(res);
-      }
-      break;
-    }
-
     case lir_convert: {
       Bytecodes::Code bc = op1->as_OpConvert()->bytecode();
       switch (bc) {
@@ -772,7 +757,8 @@ void FpuStackAllocator::handle_op2(LIR_Op2* op2) {
     }
 
     case lir_abs:
-    case lir_sqrt: {
+    case lir_sqrt:
+    case lir_neg: {
       // Right argument appears to be unused
       assert(right->is_illegal(), "must be");
       assert(left->is_fpu_register(), "must be");