commit 7796fa912b30eb7bb01167433ec775898add6d80
author Cherry Zhang <cherryyz@google.com> Fri Mar 29 14:19:27 2019 -0400
committer Cherry Zhang <cherryyz@google.com> Wed May 08 20:19:29 2019 +0000
tree 844484232ffc73a0ac4f3a001df37f350fb0d35b
parent 198c6735cb201366f5a13922ff28a8dbe81fd14f

driver: support -fgo-debug-optimization option

Change-Id: I07ff4c845b3d7bd3bb9ddda5f870f229651c2190
Reviewed-on: https://go-review.googlesource.com/c/gollvm/+/176040
Reviewed-by: Than McIntosh <thanm@google.com>

bridge/go-c.h

diff --git a/bridge/go-c.h b/bridge/go-c.h
index cd438ac..5b8b6e7 100644
--- a/bridge/go-c.h
+++ b/bridge/go-c.h
@@ -36,6 +36,7 @@
   int debug_escape_level;
   const char* debug_escape_hash;
   int64_t nil_check_size_threshold;
+  bool debug_optimization;
 };
 
 // These are defined in gofrontend and called from the bridge.

driver/CompileGo.cpp

diff --git a/driver/CompileGo.cpp b/driver/CompileGo.cpp
index e217fcb..d7cecd8 100644
--- a/driver/CompileGo.cpp
+++ b/driver/CompileGo.cpp
@@ -680,6 +680,10 @@
   opt::Arg *hasharg =
       args_.getLastArg(gollvm::options::OPT_fgo_debug_escape_hash_EQ);
   args.debug_escape_hash = (hasharg != nullptr ? hasharg->getValue() : NULL);
+  args.debug_optimization =
+      driver_.reconcileOptionPair(gollvm::options::OPT_fgo_debug_optimization,
+                                  gollvm::options::OPT_fno_go_debug_optimization,
+                                  false);
   args.nil_check_size_threshold = -1;
   args.linemap = linemap_.get();
   args.backend = bridge_.get();

driver/GollvmOptions.td

diff --git a/driver/GollvmOptions.td b/driver/GollvmOptions.td
index ffa5380..7500652 100644
--- a/driver/GollvmOptions.td
+++ b/driver/GollvmOptions.td
@@ -466,6 +466,14 @@
              " given suffix. Can be used to binary search across"
              " functions to uncover escape analysis bugs.">;
 
+def fgo_debug_optimization : Flag<["-"], "fgo-debug-optimization">,
+  Group<f_Group>,
+  HelpText<"Emit gofrontend optimization diagnostics">;
+
+def fno_go_debug_optimization : Flag<["-"], "fno-go-debug-optimization">,
+  Group<f_Group>,
+  HelpText<"Do not emit gofrontend optimization diagnostics">;
+
 def tracelevel_EQ : Joined<["-", "--"], "tracelevel=">, Group<Developer_Group>,
     HelpText<"Set debug trace level (def: 0, no trace output)">;