r333979 - [Driver][Fuchsia] Pass LTO flags to linker

[Petr Hosek via cfe-commits]

Author: phosek
Date: Mon Jun  4 18:50:59 2018
New Revision: 333979

URL: http://llvm.org/viewvc/llvm-project?rev=333979&view=rev
Log:
[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

Modified:
    cfe/trunk/lib/Driver/ToolChains/Fuchsia.cpp
    cfe/trunk/test/Driver/fuchsia.c

Modified: cfe/trunk/lib/Driver/ToolChains/Fuchsia.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Fuchsia.cpp?rev=333979&r1=333978&r2=333979&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChains/Fuchsia.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChains/Fuchsia.cpp Mon Jun  4 18:50:59 2018
@@ -100,6 +100,12 @@ void fuchsia::Linker::ConstructJob(Compi
 
   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);

Modified: cfe/trunk/test/Driver/fuchsia.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/fuchsia.c?rev=333979&r1=333978&r2=333979&view=diff
==============================================================================
--- cfe/trunk/test/Driver/fuchsia.c (original)
+++ cfe/trunk/test/Driver/fuchsia.c Mon Jun  4 18:50:59 2018
@@ -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"