On 5/2/2018 9:42 AM, Jessica Paquette via cfe-commits wrote:
Author: paquette
Date: Wed May 2 09:42:51 2018
New Revision: 331370
URL: http://llvm.org/viewvc/llvm-project?rev=331370&view=rev
Log:
Add -foutline option to enable the MachineOutliner in AArch64
It probably makes sense to also have a -fno-outline option.
-Eli
Since we've been working on productizing the MachineOutliner in AArch64, it
makes sense to provide a more user-friendly way to enable it.
This allows users of AArch64 to enable the outliner using -foutline instead
of -mllvm -enable-machine-outliner. Other, less mature implementations (e.g,
x86-64) can still enable the pass using the -mllvm option.
Also add a test to make sure it works.
Added:
cfe/trunk/test/Driver/aarch64-outliner.c
Modified:
cfe/trunk/include/clang/Driver/Options.td
cfe/trunk/lib/Driver/ToolChains/Clang.cpp
Modified: cfe/trunk/include/clang/Driver/Options.td
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=331370&r1=331369&r2=331370&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/Options.td (original)
+++ cfe/trunk/include/clang/Driver/Options.td Wed May 2 09:42:51 2018
@@ -1317,6 +1317,8 @@ def fno_exceptions : Flag<["-"], "fno-ex
def fno_gnu_keywords : Flag<["-"], "fno-gnu-keywords">, Group<f_Group>,
Flags<[CC1Option]>;
def fno_inline_functions : Flag<["-"], "fno-inline-functions">,
Group<f_clang_Group>, Flags<[CC1Option]>;
def fno_inline : Flag<["-"], "fno-inline">, Group<f_clang_Group>,
Flags<[CC1Option]>;
+def foutline : Flag<["-"], "foutline">, Group<f_clang_Group>,
Flags<[CC1Option]>,
+ HelpText<"Enable function outlining (AArch64 only)">;
def fno_experimental_isel : Flag<["-"], "fno-experimental-isel">,
Group<f_clang_Group>,
HelpText<"Disables the experimental global instruction selector">;
def fno_experimental_new_pass_manager : Flag<["-"],
"fno-experimental-new-pass-manager">,
Modified: cfe/trunk/lib/Driver/ToolChains/Clang.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Clang.cpp?rev=331370&r1=331369&r2=331370&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChains/Clang.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChains/Clang.cpp Wed May 2 09:42:51 2018
@@ -1484,6 +1484,11 @@ void Clang::AddAArch64TargetArgs(const A
else
CmdArgs.push_back("-aarch64-enable-global-merge=true");
}
+
+ if (Arg *A = Args.getLastArg(options::OPT_foutline)) {
+ CmdArgs.push_back("-mllvm");
+ CmdArgs.push_back("-enable-machine-outliner");
+ }
}
void Clang::AddMIPSTargetArgs(const ArgList &Args,
Added: cfe/trunk/test/Driver/aarch64-outliner.c
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/aarch64-outliner.c?rev=331370&view=auto
==============================================================================
--- cfe/trunk/test/Driver/aarch64-outliner.c (added)
+++ cfe/trunk/test/Driver/aarch64-outliner.c Wed May 2 09:42:51 2018
@@ -0,0 +1,4 @@
+// REQUIRES: aarch64-registered-target
+
+// RUN: %clang -target aarch64 -foutline -S %s -### 2>&1 | FileCheck %s
+// CHECK: "-mllvm" "-enable-machine-outliner"
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