compiler: add new debugging helper function debug_go_type()
Add a new debugging utility routine debug_go_type(), intended to
display the contents of a Type object in a way useful to debugging
a run of the compiler. Prior to this the only useful alternative
for debugging types was invoking the mangled_name() method, which
has problems (for example, won't work on interface types prior
to finalizing of methods).
This is a "deep" dump, meaning that all types reachable from the
type passed to debug_go_type() will be printed out. Example:
(gdb) print debug_go_type(t1)
T0 0x535f300 'net/http.Header' -> T1
T1 0x535d3d0 map ['string' -> string] T4
T2 0x5304bb0 'string' -> string
T3 0x331f900 string
T4 0x535d370 array [] 'string' -> string
Change-Id: Idd6f20d424f695f8e184b16a95f5f6a2fc0a77bb
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/166637
Reviewed-by: Ian Lance Taylor <iant@golang.org>
3 files changed
