8317507: C2 compilation fails with "Exceeded _node_regs array"

Backport-of: a5818972c16bd883d768ff2fb23a8aa9e0142c65
martinuy · Mar 22, 2024 · 9237cae · 9237cae
1 parent 50d0503
commit 9237cae
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diff --git a/src/hotspot/share/adlc/output_c.cpp b/src/hotspot/share/adlc/output_c.cpp
@@ -3040,6 +3040,9 @@ static void define_fill_new_machnode(bool used, FILE *fp_cpp) {
     fprintf(fp_cpp, "    if( i != cisc_operand() ) \n");
     fprintf(fp_cpp, "      to[i] = _opnds[i]->clone();\n");
     fprintf(fp_cpp, "  }\n");
+    fprintf(fp_cpp, "  // Do not increment node index counter, since node reuses my index\n");
+    fprintf(fp_cpp, "  Compile* C = Compile::current();\n");
+    fprintf(fp_cpp, "  C->set_unique(C->unique() - 1);\n");
     fprintf(fp_cpp, "}\n");
   }
   fprintf(fp_cpp, "\n");