DumpProg

Dump the program’s main op tree. A compiler-debugging tool, not a value-inspection tool.

DumpProg() writes the current value of PL_dumpindent as a warning and then, if PL_main_root is populated, walks the tree rooted there. Aimed at people working on Perl’s own compiler pipeline; regular scripts have no reason to call it.

Under pperl the op-tree walk reports only the indent header, since PL_main_root is not wired through the XS surface yet.