Add flto condition for the option.

Author: tianleliu

clang/lib/Driver/ToolChains/MSVC.cpp

@@ -232,9 +232,11 @@ void visualstudio::Linker::ConstructJob(Compilation &C, const JobAction &JA,
     }
   }
 
-  if (Arg *A = Args.getLastArg(options::OPT_fprofile_sample_use_EQ))
-    CmdArgs.push_back(Args.MakeArgString(std::string("-lto-sample-profile:") +
-                                         A->getValue()));
+  if (C.getDriver().isUsingLTO()) {
+    if (Arg *A = Args.getLastArg(options::OPT_fprofile_sample_use_EQ))
+      CmdArgs.push_back(Args.MakeArgString(std::string("-lto-sample-profile:") +
+                                           A->getValue()));
+  }
   Args.AddAllArgValues(CmdArgs, options::OPT__SLASH_link);
 
   // Control Flow Guard checks

clang/test/Driver/cl-link.c

@@ -72,5 +72,5 @@
 // INFER-LLD: lld-link
 // INFER-LLD-NOT: INFERASANLIBS
 
-// RUN: %clang_cl --target=x86_64-unknown-windows-msvc -fuse-ld=lld -### -S -fprofile-sample-use=%S/Inputs/file.prof %s 2>&1 | FileCheck -check-prefix=CHECK-SAMPLE-PROFILE %s
+// RUN: %clang_cl --target=x86_64-unknown-windows-msvc -flto -fuse-ld=lld -### -S -fprofile-sample-use=%S/Inputs/file.prof %s 2>&1 | FileCheck -check-prefix=CHECK-SAMPLE-PROFILE %s
 // CHECK-SAMPLE-PROFILE: "-lto-sample-profile:{{.*}}/file.prof"