further enable the Sparc LLVM backend

Author: jakllsch

configure

@@ -1821,7 +1821,7 @@ do
         CMAKE_ARGS="$CMAKE_ARGS -DLLVM_ENABLE_ASSERTIONS=ON"
     fi
 
-    CMAKE_ARGS="$CMAKE_ARGS -DLLVM_TARGETS_TO_BUILD='X86;ARM;AArch64;Mips;PowerPC;SystemZ;JSBackend;MSP430'"
+    CMAKE_ARGS="$CMAKE_ARGS -DLLVM_TARGETS_TO_BUILD='X86;ARM;AArch64;Mips;PowerPC;SystemZ;JSBackend;MSP430;Sparc'"
     CMAKE_ARGS="$CMAKE_ARGS -G '$CFG_CMAKE_GENERATOR'"
     CMAKE_ARGS="$CMAKE_ARGS $CFG_LLVM_SRC_DIR"
 

mk/main.mk

@@ -285,7 +285,7 @@ endif
 # LLVM macros
 ######################################################################
 
-LLVM_OPTIONAL_COMPONENTS=x86 arm aarch64 mips powerpc pnacl systemz jsbackend msp430
+LLVM_OPTIONAL_COMPONENTS=x86 arm aarch64 mips powerpc pnacl systemz jsbackend msp430 sparc
 LLVM_REQUIRED_COMPONENTS=ipo bitreader bitwriter linker asmparser mcjit \
                 interpreter instrumentation
 

src/rustllvm/PassWrapper.cpp

@@ -146,14 +146,21 @@ LLVMRustAddPass(LLVMPassManagerRef PM, LLVMPassRef rust_pass) {
 #define SUBTARGET_MSP430
 #endif
 
+#ifdef LLVM_COMPONENT_SPARC
+#define SUBTARGET_SPARC SUBTARGET(Sparc)
+#else
+#define SUBTARGET_SPARC
+#endif
+
 #define GEN_SUBTARGETS    \
         SUBTARGET_X86     \
         SUBTARGET_ARM     \
         SUBTARGET_AARCH64 \
         SUBTARGET_MIPS    \
         SUBTARGET_PPC     \
         SUBTARGET_SYSTEMZ \
-        SUBTARGET_MSP430
+        SUBTARGET_MSP430  \
+        SUBTARGET_SPARC
 
 #define SUBTARGET(x) namespace llvm {                \
     extern const SubtargetFeatureKV x##FeatureKV[];  \