[Driver][Fuchsia] Pass LTO flags to linker

Even though we use lld by default for Fuchsia, we use Gold plugin
arguments like all other drivers as lld supports Gold plugin options.

Differential Revision: https://reviews.llvm.org/D47668

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@333979 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/ToolChains/Fuchsia.cpp b/lib/Driver/ToolChains/Fuchsia.cpp
index cfdb3d80a58f6fafe12f822e8fab7e6e3801bbb6..c54cf60ef8209b7c78d7307f5efaf2594e150089 100644 (file)
--- a/lib/Driver/ToolChains/Fuchsia.cpp
+++ b/lib/Driver/ToolChains/Fuchsia.cpp
@@ -100,6 +100,12 @@ void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 
   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
 
+  if (D.isUsingLTO()) {
+    assert(!Inputs.empty() && "Must have at least one input.");
+    AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0],
+                  D.getLTOMode() == LTOK_Thin);
+  }
+
   addSanitizerRuntimes(ToolChain, Args, CmdArgs);
 
   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);

diff --git a/test/Driver/fuchsia.c b/test/Driver/fuchsia.c
index 1ec79356412c256685ce89e2519528c610599d0b..c2b02522ab141a0508e0837db4c7806ce42f08db 100644 (file)
--- a/test/Driver/fuchsia.c
+++ b/test/Driver/fuchsia.c
@@ -114,3 +114,16 @@
 // RUN:     | FileCheck %s -check-prefix=CHECK-SCUDO-SHARED
 // CHECK-SCUDO-SHARED: "-fsanitize=safe-stack,scudo"
 // CHECK-SCUDO-SHARED: "{{.*[/\\]}}libclang_rt.scudo-x86_64.so"
+
+// RUN: %clang %s -### --target=aarch64-fuchsia \
+// RUN:     -O3 -flto -mcpu=cortex-a53 2>&1 \
+// RUN:     | FileCheck %s -check-prefix=CHECK-LTO
+// CHECK-LTO: "-plugin-opt=mcpu=cortex-a53"
+// CHECK-LTO: "-plugin-opt=O3"
+
+// RUN: %clang %s -### --target=x86_64-fuchsia \
+// RUN:     -flto=thin -flto-jobs=8 2>&1 \
+// RUN:     | FileCheck %s -check-prefix=CHECK-THINLTO
+// CHECK-THINLTO: "-plugin-opt=mcpu=x86-64"
+// CHECK-THINLTO: "-plugin-opt=thinlto"
+// CHECK-THINLTO: "-plugin-opt=jobs=8"