[Sparc] Add software float option -msoft-float

Summary:
Following patch D19265 which enable software floating point support in the Sparc backend, this patch enables the option to be enabled in the front-end using the -msoft-float option.

The user should ensure a library (such as the builtins from Compiler-RT) that includes the software floating point routines is provided.

Reviewers: jyknight, lero_chris

Subscribers: jyknight, cfe-commits

Differential Revision: http://reviews.llvm.org/D20419

llvm-svn: 270538

1 files changed, 1 insertions, 3 deletions

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index cd9c51adab9..4d06ebb724b 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -6333,12 +6333,10 @@ public:
 
   bool handleTargetFeatures(std::vector<std::string> &Features,
                             DiagnosticsEngine &Diags) override {
-    // The backend doesn't actually handle soft float yet, but in case someone
-    // is using the support for the front end continue to support it.
+    // Check if software floating point is enabled
     auto Feature = std::find(Features.begin(), Features.end(), "+soft-float");
     if (Feature != Features.end()) {
       SoftFloat = true;
-      Features.erase(Feature);
     }
     return true;
   }