Don't reduce the stack protector level given -fstack-protector.

Before -fstack-protector would always force a level of 1, even if the default
was 2.

Patch by Brad Smith.

llvm-svn: 209479

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 3fe552d..7670daa 100644 (file)
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -3379,9 +3379,10 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
                                options::OPT_fstack_protector_all,
                                options::OPT_fstack_protector_strong,
                                options::OPT_fstack_protector)) {
-    if (A->getOption().matches(options::OPT_fstack_protector))
-      StackProtectorLevel = LangOptions::SSPOn;
-    else if (A->getOption().matches(options::OPT_fstack_protector_strong))
+    if (A->getOption().matches(options::OPT_fstack_protector)) {
+      StackProtectorLevel = std::max<unsigned>(LangOptions::SSPOn,
+        getToolChain().GetDefaultStackProtectorLevel(KernelOrKext));
+    } else if (A->getOption().matches(options::OPT_fstack_protector_strong))
       StackProtectorLevel = LangOptions::SSPStrong;
     else if (A->getOption().matches(options::OPT_fstack_protector_all))
       StackProtectorLevel = LangOptions::SSPReq;

diff --git a/clang/test/Driver/stack-protector.c b/clang/test/Driver/stack-protector.c
index cf2cc34..7576c3a 100644 (file)
--- a/clang/test/Driver/stack-protector.c
+++ b/clang/test/Driver/stack-protector.c
@@ -13,6 +13,9 @@
 // RUN: %clang -target i386-pc-openbsd -### %s 2>&1 | FileCheck %s -check-prefix=OPENBSD
 // OPENBSD: "-stack-protector" "2"
 
+// RUN: %clang -target i386-pc-openbsd -fstack-protector -### %s 2>&1 | FileCheck %s -check-prefix=OPENBSD_SPS
+// OPENBSD_SPS: "-stack-protector" "2"
+
 // RUN: %clang -target i386-pc-openbsd -fno-stack-protector -### %s 2>&1 | FileCheck %s -check-prefix=OPENBSD_OFF
 // OPENBSD_OFF-NOT: "-stack-protector"