Add register Mips::GP to the list of reserved registers if target is bare-metal

to prevent it from being clobbered. mips uses $gp to access small data section.

This bug was originally reported by Carl Norum.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162340 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/Target/Mips/MipsSubtarget.h b/lib/Target/Mips/MipsSubtarget.h
index ba15362f07..0595e8dd0c 100644
--- a/lib/Target/Mips/MipsSubtarget.h
+++ b/lib/Target/Mips/MipsSubtarget.h
@@ -65,6 +65,9 @@ protected:
   // isLinux - Target system is Linux. Is false we consider ELFOS for now.
   bool IsLinux;
 
+  // UseSmallSection - Small section is used.
+  bool UseSmallSection;
+
   /// Features related to the presence of specific instructions.
 
   // HasSEInReg - SEB and SEH (signext in register) instructions.
@@ -109,7 +112,7 @@ public:
   /// This constructor initializes the data members to match that
   /// of the specified triple.
   MipsSubtarget(const std::string &TT, const std::string &CPU,
-                const std::string &FS, bool little);
+                const std::string &FS, bool little, Reloc::Model RM);
 
   /// ParseSubtargetFeatures - Parses features string setting specified
   /// subtarget options.  Definition of function is auto generated by tblgen.
@@ -133,6 +136,7 @@ public:
   bool inMips16Mode() const { return InMips16Mode; }
   bool isAndroid() const { return IsAndroid; }
   bool isLinux() const { return IsLinux; }
+  bool useSmallSection() const { return UseSmallSection; }
 
   bool hasStandardEncoding() const { return !inMips16Mode(); }