From b7d50115ba4900da6db7afb6460ad42ff19ba6a2 Mon Sep 17 00:00:00 2001
From: Martin Storsjo <martin@martin.st>
Date: Tue, 15 May 2018 06:34:18 +0000
Subject: [PATCH] [MinGW] Add a LLD specific option -pdb

This allows producing pdb debug info. This is an LLD specific option
since GCC and GNU binutils doesn't support the PDB file format.

Differential Revision: https://reviews.llvm.org/D46796

llvm-svn: 332327
---
 lld/MinGW/Driver.cpp       | 9 +++++++--
 lld/MinGW/Options.td       | 1 +
 lld/test/MinGW/driver.test | 4 ++++
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/lld/MinGW/Driver.cpp b/lld/MinGW/Driver.cpp
index 0b7e083..01cd3b2 100644
--- a/lld/MinGW/Driver.cpp
+++ b/lld/MinGW/Driver.cpp
@@ -144,14 +144,19 @@ bool mingw::link(ArrayRef<const char *> ArgsArr, raw_ostream &Diag) {
   else
     Add("-out:a.exe");
 
+  if (auto *A = Args.getLastArg(OPT_pdb)) {
+    Add("-debug");
+    Add("-pdb:" + StringRef(A->getValue()));
+  } else if (!Args.hasArg(OPT_strip_all)) {
+    Add("-debug:dwarf");
+  }
+
   if (Args.hasArg(OPT_shared))
     Add("-dll");
   if (Args.hasArg(OPT_verbose))
     Add("-verbose");
   if (Args.hasArg(OPT_export_all_symbols))
     Add("-export-all-symbols");
-  if (!Args.hasArg(OPT_strip_all))
-    Add("-debug:dwarf");
   if (Args.hasArg(OPT_large_address_aware))
     Add("-largeaddressaware");
   if (Args.hasArg(OPT_kill_at))
diff --git a/lld/MinGW/Options.td b/lld/MinGW/Options.td
index 6840471..d963f82 100644
--- a/lld/MinGW/Options.td
+++ b/lld/MinGW/Options.td
@@ -41,6 +41,7 @@ def verbose: F<"verbose">, HelpText<"Verbose mode">;
 def _HASH_HASH_HASH : Flag<["-"], "###">,
     HelpText<"Print (but do not run) the commands to run for this compilation">;
 def mllvm: S<"mllvm">;
+def pdb: S<"pdb">, HelpText<"Specify output PDB debug information file">;
 def Xlink : J<"Xlink=">, MetaVarName<"<arg>">,
     HelpText<"Pass <arg> to the COFF linker">;
 
diff --git a/lld/test/MinGW/driver.test b/lld/test/MinGW/driver.test
index 1a95d23..14593d0 100644
--- a/lld/test/MinGW/driver.test
+++ b/lld/test/MinGW/driver.test
@@ -90,6 +90,10 @@ RUN: ld.lld -### -m i386pep foo.o -s | FileCheck -check-prefix STRIP %s
 RUN: ld.lld -### -m i386pep foo.o --strip-all | FileCheck -check-prefix STRIP %s
 STRIP-NOT: -debug:dwarf
 
+RUN: ld.lld -### -m i386pep foo.o -pdb out.pdb | FileCheck -check-prefix PDB %s
+PDB: -debug -pdb:out.pdb
+PDB-NOT: -debug:dwarf
+
 RUN: ld.lld -### -m i386pep foo.o --large-address-aware | FileCheck -check-prefix LARGE-ADDRESS-AWARE %s
 LARGE-ADDRESS-AWARE: -largeaddressaware
 
-- 
2.7.4