[Driver] Pass -malign-double from the driver to the cc1 command line

-malign-double is currently only implemented in the -cc1 interface. But its declared in Options.td so it is a driver option too. But you try to use it with the driver you'll get a message about the option being unused.

This patch teaches the driver to pass the option through to cc1 so it won't be unused. The Options.td says the option is x86 only but I didn't see any x86 specific code in its impementation in cc1 so not sure if the documentation is wrong or if I should only pass this option through the driver on x86 targets.

Differential Revision: https://reviews.llvm.org/D59624

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@356706 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/ToolChains/Clang.cpp b/lib/Driver/ToolChains/Clang.cpp
index bf9ab9dd1074e3fb5597ede084d2b29492dca354..20f55dff5abc078a99db72b29ab9db1f13e4eb2c 100644 (file)
--- a/lib/Driver/ToolChains/Clang.cpp
+++ b/lib/Driver/ToolChains/Clang.cpp
@@ -4547,6 +4547,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_parseable_fixits);
   Args.AddLastArg(CmdArgs, options::OPT_ftime_report);
   Args.AddLastArg(CmdArgs, options::OPT_ftrapv);
+  Args.AddLastArg(CmdArgs, options::OPT_malign_double);
 
   if (Arg *A = Args.getLastArg(options::OPT_ftrapv_handler_EQ)) {
     CmdArgs.push_back("-ftrapv-handler");

diff --git a/test/Driver/malign_double.c b/test/Driver/malign_double.c
new file mode 100644 (file)
index 0000000..2c5cc35
--- /dev/null
+++ b/test/Driver/malign_double.c
@@ -0,0 +1,5 @@
+// RUN: %clang -### -malign-double %s  2>&1 | FileCheck %s
+
+// Make sure -malign-double is passed through the driver.
+
+// CHECK: "-malign-double"