[Driver] Pass -O* to the gold plugin via -plugin-opt

The gold plugin understands -O0..-O3, but these are not currently being passed to it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@256146 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 6947219e914aebf74b08179d22b0ee4a29558169..fd299ea695aba37e51d55d17a89b371a61fd0a42 100644 (file)
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1796,6 +1796,19 @@ static void AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args,
   if (!CPU.empty())
     CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
 
+  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
+    StringRef OOpt;
+    if (A->getOption().matches(options::OPT_O4) ||
+        A->getOption().matches(options::OPT_Ofast))
+      OOpt = "3";
+    else if (A->getOption().matches(options::OPT_O))
+      OOpt = A->getValue();
+    else if (A->getOption().matches(options::OPT_O0))
+      OOpt = "0";
+    if (!OOpt.empty())
+      CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
+  }
+
   if (IsThinLTO)
     CmdArgs.push_back("-plugin-opt=thinlto");
 }

diff --git a/test/Driver/gold-lto.c b/test/Driver/gold-lto.c
index db6786ffd8b8c14c7cef575965e64997e36cdf41..050b1ef18be14070a22181451208a88bdcc1bbeb 100644 (file)
--- a/test/Driver/gold-lto.c
+++ b/test/Driver/gold-lto.c
@@ -1,23 +1,26 @@
 // RUN: touch %t.o
 //
 // RUN: %clang -target x86_64-unknown-linux -### %t.o -flto 2>&1 \
-// RUN:     -Wl,-plugin-opt=foo \
+// RUN:     -Wl,-plugin-opt=foo -O3 \
 // RUN:     | FileCheck %s --check-prefix=CHECK-X86-64-BASIC
 // CHECK-X86-64-BASIC: "-plugin" "{{.*}}/LLVMgold.so"
+// CHECK-X86-64-BASIC: "-plugin-opt=O3"
 // CHECK-X86-64-BASIC: "-plugin-opt=foo"
 //
 // RUN: %clang -target x86_64-unknown-linux -### %t.o -flto 2>&1 \
-// RUN:     -march=corei7 -Wl,-plugin-opt=foo \
+// RUN:     -march=corei7 -Wl,-plugin-opt=foo -Ofast \
 // RUN:     | FileCheck %s --check-prefix=CHECK-X86-64-COREI7
 // CHECK-X86-64-COREI7: "-plugin" "{{.*}}/LLVMgold.so"
 // CHECK-X86-64-COREI7: "-plugin-opt=mcpu=corei7"
+// CHECK-X86-64-COREI7: "-plugin-opt=O3"
 // CHECK-X86-64-COREI7: "-plugin-opt=foo"
 //
 // RUN: %clang -target arm-unknown-linux -### %t.o -flto 2>&1 \
-// RUN:     -march=armv7a -Wl,-plugin-opt=foo \
+// RUN:     -march=armv7a -Wl,-plugin-opt=foo -O0 \
 // RUN:     | FileCheck %s --check-prefix=CHECK-ARM-V7A
 // CHECK-ARM-V7A: "-plugin" "{{.*}}/LLVMgold.so"
 // CHECK-ARM-V7A: "-plugin-opt=mcpu=cortex-a8"
+// CHECK-ARM-V7A: "-plugin-opt=O0"
 // CHECK-ARM-V7A: "-plugin-opt=foo"
 //
 // RUN: %clang -target i686-linux-android -### %t.o -flto 2>&1 \