RuntimeLibcalls: Cleanup sincos predicate functions

The darwinHasSinCos wasn't actually used for sincos, only the stret
variant. Rename this to reflect that, and introduce a new one for
enabling sincos.

Author: arsenm

llvm/include/llvm/IR/RuntimeLibcalls.h

@@ -116,7 +116,7 @@ struct RuntimeLibcallsInfo {
   // opcode.
   CmpInst::Predicate SoftFloatCompareLibcallPredicates[RTLIB::UNKNOWN_LIBCALL];
 
-  static bool darwinHasSinCos(const Triple &TT) {
+  static bool darwinHasSinCosStret(const Triple &TT) {
     assert(TT.isOSDarwin() && "should be called with darwin triple");
     // Don't bother with 32 bit x86.
     if (TT.getArch() == Triple::x86)
@@ -131,6 +131,12 @@ struct RuntimeLibcallsInfo {
     return true;
   }
 
+  /// Return true if the target has sincosf/sincos/sincosl functions
+  static bool hasSinCos(const Triple &TT) {
+    return TT.isGNUEnvironment() || TT.isOSFuchsia() ||
+           (TT.isAndroid() && !TT.isAndroidVersionLT(9));
+  }
+
   void initSoftFloatCmpLibcallPredicates();
 
   /// Set default libcall names. If a target wants to opt-out of a libcall it

llvm/lib/IR/RuntimeLibcalls.cpp

@@ -170,7 +170,7 @@ void RuntimeLibcallsInfo::initLibcalls(const Triple &TT) {
       break;
     }
 
-    if (darwinHasSinCos(TT)) {
+    if (darwinHasSinCosStret(TT)) {
       setLibcallName(RTLIB::SINCOS_STRET_F32, "__sincosf_stret");
       setLibcallName(RTLIB::SINCOS_STRET_F64, "__sincos_stret");
       if (TT.isWatchABI()) {
@@ -214,8 +214,7 @@ void RuntimeLibcallsInfo::initLibcalls(const Triple &TT) {
     setLibcallName(RTLIB::EXP10_F64, "__exp10");
   }
 
-  if (TT.isGNUEnvironment() || TT.isOSFuchsia() ||
-      (TT.isAndroid() && !TT.isAndroidVersionLT(9))) {
+  if (hasSinCos(TT)) {
     setLibcallName(RTLIB::SINCOS_F32, "sincosf");
     setLibcallName(RTLIB::SINCOS_F64, "sincos");
     setLibcallName(RTLIB::SINCOS_F80, "sincosl");