Updated PGO/LTO setup

firefox.spec

@@ -77,7 +77,6 @@ ExcludeArch: armv7hl
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        64.0
-
 Release:        5%{?pre_tag}%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
@@ -149,7 +148,10 @@ Patch586:        firefox-wayland-crash-mozbz1507475.patch
 # Debian patches
 Patch500:        mozilla-440908.patch
 
-Patch501:        pgo.patch
+# PGO/LTO patches
+Patch600:        pgo.patch
+Patch601:        mozilla-1516081.patch
+Patch602:        mozilla-1516803.patch
 
 %if %{?system_nss}
 BuildRequires:  pkgconfig(nspr) >= %{nspr_version}
@@ -356,8 +358,10 @@ This package contains results of tests executed during build.
 %patch585 -p1 -b .mozbz1507475
 %patch586 -p1 -b .crash-mozbz1507475
 
-%patch501 -p1 -b .pgo
-
+# PGO patches
+%patch600 -p1 -b .pgo
+%patch601 -p1 -b .1516081
+%patch602 -p1 -b .1516803
 
 %{__rm} -f .mozconfig
 %{__cp} %{SOURCE10} .mozconfig
@@ -553,7 +557,7 @@ export MOZ_MAKE_FLAGS="$MOZ_SMP_FLAGS"
 export MOZ_SERVICES_SYNC="1"
 export STRIP=/bin/true
 %if 0%{?build_with_pgo}
-xvfb-run ./mach build
+GDK_BACKEND=x11 xvfb-run ./mach build
 %else
 ./mach build
 %endif

mozilla-1516081.patch

@@ -0,0 +1,38 @@
+diff -up firefox-64.0/build/moz.configure/toolchain.configure.1516081 firefox-64.0/build/moz.configure/toolchain.configure
+--- firefox-64.0/build/moz.configure/toolchain.configure.1516081	2018-12-07 03:56:20.000000000 +0100
++++ firefox-64.0/build/moz.configure/toolchain.configure	2019-01-03 15:30:08.207368056 +0100
+@@ -1304,7 +1304,7 @@ def pgo_flags(compiler, build_env, targe
+ 
+     if compiler.type == 'gcc':
+         return namespace(
+-            gen_cflags=['-fprofile-generate'],
++            gen_cflags=['-fprofile-generate', '-DMOZ_PROFILE_INSTRUMENTATION'],
+             gen_ldflags=['-fprofile-generate'],
+             use_cflags=['-fprofile-use', '-fprofile-correction',
+                         '-Wcoverage-mismatch'],
+@@ -1325,7 +1325,8 @@ def pgo_flags(compiler, build_env, targe
+ 
+         if gen_ldflags:
+             return namespace(
+-                gen_cflags=['-fprofile-instr-generate'],
++                gen_cflags=['-fprofile-instr-generate',
++			    '-DMOZ_PROFILE_INSTRUMENTATION'],
+                 gen_ldflags=gen_ldflags,
+                 use_cflags=['-fprofile-instr-use=%s' % profdata,
+                             '-Wno-error=profile-instr-out-of-date',
+diff -up firefox-64.0/toolkit/components/terminator/nsTerminator.cpp.1516081 firefox-64.0/toolkit/components/terminator/nsTerminator.cpp
+--- firefox-64.0/toolkit/components/terminator/nsTerminator.cpp.1516081	2019-01-03 15:30:08.207368056 +0100
++++ firefox-64.0/toolkit/components/terminator/nsTerminator.cpp	2019-01-03 15:31:33.445034029 +0100
+@@ -441,6 +441,12 @@ nsTerminator::StartWatchdog()
+     }
+   }
+ # endif
++  // Disable watchdog for PGO train builds - writting profile information at
++  // exit may take time and it is better to make build hang rather than
++  // silently produce poorly performing binary.
++#ifdef MOZ_PROFILE_INSTRUMENTATION
++  crashAfterMS = INT32_MAX;
++#endif
+ 
+   UniquePtr<Options> options(new Options());
+   const PRIntervalTime ticksDuration = PR_MillisecondsToInterval(1000);

mozilla-1516803.patch

@@ -0,0 +1,16 @@
+diff --git a/security/sandbox/linux/moz.build b/security/sandbox/linux/moz.build
+--- a/security/sandbox/linux/moz.build
++++ b/security/sandbox/linux/moz.build
+@@ -99,9 +99,8 @@
+ # gcc lto likes to put the top level asm in syscall.cc in a different partition
+ # from the function using it which breaks the build.  Work around that by
+ # forcing there to be only one partition.
+-for f in CONFIG['OS_CXXFLAGS']:
+-    if f.startswith('-flto') and CONFIG['CC_TYPE'] != 'clang':
+-        LDFLAGS += ['--param lto-partitions=1']
++if CONFIG['CC_TYPE'] != 'clang':
++    LDFLAGS += ['--param', 'lto-partitions=1']
+ 
+ DEFINES['NS_NO_XPCOM'] = True
+ DisableStlWrapping()
+

pgo.patch

@@ -1,6 +1,25 @@
-diff -up firefox-64.0/extensions/spellcheck/src/moz.build.old firefox-64.0/extensions/spellcheck/src/moz.build
---- firefox-64.0/extensions/spellcheck/src/moz.build.old	2018-12-20 12:23:16.103206546 +0100
-+++ firefox-64.0/extensions/spellcheck/src/moz.build	2018-12-20 12:23:44.077140279 +0100
+diff -up firefox-64.0/build/unix/mozconfig.unix.pgo firefox-64.0/build/unix/mozconfig.unix
+--- firefox-64.0/build/unix/mozconfig.unix.pgo	2019-01-03 15:23:16.792980384 +0100
++++ firefox-64.0/build/unix/mozconfig.unix	2019-01-03 15:24:29.978693550 +0100
+@@ -6,6 +6,15 @@ if [ -n "$FORCE_GCC" ]; then
+     CC="$TOOLTOOL_DIR/gcc/bin/gcc"
+     CXX="$TOOLTOOL_DIR/gcc/bin/g++"
+ 
++    if [ -n "$MOZ_PGO" ]; then
++        if [ -z "$USE_ARTIFACT" ]; then
++            ac_add_options --enable-lto
++        fi
++        export AR="$topsrcdir/gcc/bin/gcc-ar"
++        export NM="$topsrcdir/gcc/bin/gcc-nm"
++        export RANLIB="$topsrcdir/gcc/bin/gcc-ranlib"
++    fi
++
+     # We want to make sure we use binutils and other binaries in the tooltool
+     # package.
+     mk_add_options "export PATH=$TOOLTOOL_DIR/gcc/bin:$PATH"
+diff -up firefox-64.0/extensions/spellcheck/src/moz.build.pgo firefox-64.0/extensions/spellcheck/src/moz.build
+--- firefox-64.0/extensions/spellcheck/src/moz.build.pgo	2018-12-07 03:56:27.000000000 +0100
++++ firefox-64.0/extensions/spellcheck/src/moz.build	2019-01-03 15:21:32.793385074 +0100
 @@ -28,3 +28,5 @@ EXPORTS.mozilla += [
  
  if CONFIG['CC_TYPE'] in ('clang', 'gcc'):