[Clang] Move XCore specific options from Clang.cpp to XCore.cpp

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D118535

clang/lib/Driver/ToolChains/Clang.cpp

@@ -6266,7 +6266,6 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   if (!Args.hasFlag(
           options::OPT_fuse_cxa_atexit, options::OPT_fno_use_cxa_atexit,
           !RawTriple.isOSAIX() && !RawTriple.isOSWindows() &&
-              TC.getArch() != llvm::Triple::xcore &&
               ((RawTriple.getVendor() != llvm::Triple::MipsTechnologies) ||
                RawTriple.hasEnvironment())) ||
       KernelOrKext)

clang/lib/Driver/ToolChains/XCore.cpp

@@ -130,6 +130,10 @@ void XCoreToolChain::addClangTargetOptions(const ArgList &DriverArgs,
                                            ArgStringList &CC1Args,
                                            Action::OffloadKind) const {
   CC1Args.push_back("-nostdsysteminc");
+  // Set `-fno-use-cxa-atexit` to default.
+  if (!DriverArgs.hasFlag(options::OPT_fuse_cxa_atexit,
+                          options::OPT_fno_use_cxa_atexit, false))
+    CC1Args.push_back("-fno-use-cxa-atexit");
 }
 
 void XCoreToolChain::AddClangCXXStdlibIncludeArgs(

clang/test/Driver/xcore-opts.c

@@ -4,9 +4,8 @@
 // RUN: %clang -target xcore %s -g0 -### -o %t.o 2>&1 | FileCheck -check-prefix CHECK-G0 %s
 
 // CHECK: "-mframe-pointer=none"
-// CHECK: "-nostdsysteminc"
+// CHECK: "-nostdsysteminc" "-fno-use-cxa-atexit"
 // CHECK: "-fno-signed-char"
-// CHECK: "-fno-use-cxa-atexit"
 // CHECK-NOT: "-fcxx-exceptions"
 // CHECK-NOT: "-fexceptions"
 // CHECK-NOT: "-fcommon"
@@ -30,4 +29,3 @@
 // CHECK-G0: xcc"
 // CHECK-G0-NOT: "-g"
 // CHECK-G0: xcc"
-