[ThinLTOCodeGenerator] Add support for index-based WPD
This is clang part of the patch. It adds -flto-unit flag for thin LTO
builds on Mac and PS4
Differential revision: https://reviews.llvm.org/D68950
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@375224 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains/Clang.cpp b/lib/Driver/ToolChains/Clang.cpp
index bfccf7a..55d6317 100644
--- a/lib/Driver/ToolChains/Clang.cpp
+++ b/lib/Driver/ToolChains/Clang.cpp
@@ -3631,13 +3631,7 @@
if (D.isUsingLTO() && !isDeviceOffloadAction) {
Args.AddLastArg(CmdArgs, options::OPT_flto, options::OPT_flto_EQ);
-
- // The Darwin and PS4 linkers currently use the legacy LTO API, which
- // does not support LTO unit features (CFI, whole program vtable opt)
- // under ThinLTO.
- if (!(RawTriple.isOSDarwin() || RawTriple.isPS4()) ||
- D.getLTOMode() == LTOK_Full)
- CmdArgs.push_back("-flto-unit");
+ CmdArgs.push_back("-flto-unit");
}
}
diff --git a/test/Driver/lto-unit.c b/test/Driver/lto-unit.c
index 1f1a286..0fdd493 100644
--- a/test/Driver/lto-unit.c
+++ b/test/Driver/lto-unit.c
@@ -1,9 +1,8 @@
// RUN: %clang -target x86_64-unknown-linux -### %s -flto=full 2>&1 | FileCheck --check-prefix=UNIT %s
// RUN: %clang -target x86_64-unknown-linux -### %s -flto=thin 2>&1 | FileCheck --check-prefix=UNIT %s
// RUN: %clang -target x86_64-apple-darwin13.3.0 -### %s -flto=full 2>&1 | FileCheck --check-prefix=UNIT %s
-// RUN: %clang -target x86_64-apple-darwin13.3.0 -### %s -flto=thin 2>&1 | FileCheck --check-prefix=NOUNIT %s
+// RUN: %clang -target x86_64-apple-darwin13.3.0 -### %s -flto=thin 2>&1 | FileCheck --check-prefix=UNIT %s
// RUN: %clang -target x86_64-scei-ps4 -### %s -flto=full 2>&1 | FileCheck --check-prefix=UNIT %s
-// RUN: %clang -target x86_64-scei-ps4 -### %s -flto=thin 2>&1 | FileCheck --check-prefix=NOUNIT %s
+// RUN: %clang -target x86_64-scei-ps4 -### %s -flto=thin 2>&1 | FileCheck --check-prefix=UNIT %s
// UNIT: "-flto-unit"
-// NOUNIT-NOT: "-flto-unit"
