2016-01-28 17:54 GMT-03:00 Joseph Myers <jos...@codesourcery.com>:
> Any patch adding a new option needs to add documentation for it to
> invoke.texi (both substantive documentation, and inclusion in the summary
> lists of options).
>
> --
> Joseph S. Myers
> jos...@codesourcery.com
Hi,
Thanks for the feedback, I've just updated the documentation.
patch:
diff --git a/gcc/common.opt b/gcc/common.opt
index 1218a71..bf0c7df 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -1168,6 +1168,10 @@ fdump-passes
Common Var(flag_dump_passes) Init(0)
Dump optimization passes
+fdump-memoization-hits
+Common Var(flag_dump_memoization_hits) Init(0)
+Dump info about constexpr calls memoized.
+
fdump-unnumbered
Common Report Var(flag_dump_unnumbered)
Suppress output of instruction numbers, line number notes and
addresses in debugging dumps
diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index e250726..41ae5b3 100644
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -42,6 +42,8 @@ along with GCC; see the file COPYING3. If not see
#include "builtins.h"
#include "tree-inline.h"
#include "ubsan.h"
+#include "tree-pretty-print.h"
+#include "dumpfile.h"
static bool verify_constant (tree, bool, bool *, bool *);
#define VERIFY_CONSTANT(X) \
@@ -1173,6 +1175,14 @@ cx_error_context (void)
return r;
}
+static void
+dump_memoization_hit (FILE *file, tree call, int flags)
+{
+ fprintf(file, "Memoized call:\n");
+ print_generic_decl(file, call, flags);
+ fprintf(file, "\n");
+}
+
/* Subroutine of cxx_eval_constant_expression.
Evaluate the call expression tree T in the context of OLD_CALL expression
evaluation. */
@@ -1338,7 +1348,11 @@ cxx_eval_call_expression (const constexpr_ctx
*ctx, tree t,
entry->result = result = error_mark_node;
}
else
- result = entry->result;
+ {
+ if (flag_dump_memoization_hits)
+ dump_memoization_hit(stderr, t, 0);
+ result = entry->result;
+ }
}
if (!depth_ok)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index f84a199..b78bd4b 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -322,6 +322,7 @@ Objective-C and Objective-C++ Dialects}.
-fdump-class-hierarchy@r{[}-@var{n}@r{]} @gol
-fdump-ipa-all -fdump-ipa-cgraph -fdump-ipa-inline @gol
-fdump-passes @gol
+-fdump-memoization-hits @gol
-fdump-statistics @gol
-fdump-tree-all @gol
-fdump-tree-original@r{[}-@var{n}@r{]} @gol
@@ -6771,6 +6772,10 @@ Dump after function inlining.
Dump the list of optimization passes that are turned on and off by
the current command-line options.
+@item -fdump-memoization-hits
+@opindex fdump-memoization-hits
+Dump the list of constexpr function calls that were memoized.
+
@item -fdump-statistics-@var{option}
@opindex fdump-statistics
Enable and control dumping of pass statistics in a separate file. The
