src/cpu/s390/vm/s390.ad

rev 12501 : 8173470: [C2] Mask shift operands in ideal graph.

@@ -6768,10 +6768,11 @@
   match(Set dst (LShiftI src nbits));
   size(6);
   format %{ "SLL     $dst,$src,$nbits\t# use RISC-like SLLG also for int" %}
   ins_encode %{
     int Nbit = $nbits$$constant;
+    assert((Nbit & (BitsPerJavaInteger - 1)) == Nbit, "Check shift mask in ideal graph");
     __ z_sllg($dst$$Register, $src$$Register, Nbit & (BitsPerJavaInteger - 1), Z_R0);
   %}
   ins_pipe(pipe_class_dummy);
 %}
 

@@ -6841,10 +6842,11 @@
   effect(KILL cr);
   size(4);
   format %{ "SRA     $dst,$src" %}
   ins_encode %{
     int Nbit = $src$$constant;
+    assert((Nbit & (BitsPerJavaInteger - 1)) == Nbit, "Check shift mask in ideal graph");
     __ z_sra($dst$$Register, Nbit & (BitsPerJavaInteger - 1), Z_R0);
   %}
   ins_pipe(pipe_class_dummy);
 %}
 

@@ -6893,10 +6895,11 @@
   match(Set dst (URShiftI dst src));
   size(4);
   format %{ "SRL     $dst,$src" %}
   ins_encode %{
     int Nbit = $src$$constant;
+    assert((Nbit & (BitsPerJavaInteger - 1)) == Nbit, "Check shift mask in ideal graph");
     __ z_srl($dst$$Register, Nbit & (BitsPerJavaInteger - 1), Z_R0);
   %}
   ins_pipe(pipe_class_dummy);
 %}