RuntimeLibcalls: Mostly move x86 configuration into tablegen

This is getting pretty ugly, but seems to be the worst of the
cases. Opting out of the base set of calls for the various windows
cases is really ugly. We need to apply that to the arm cases as well.

It also may make sense to go back to transposing the architecture
and operating system (i.e. make isOSWindows the SystemLibrary
and then modify based on architecture).

Author: arsenm

llvm/include/llvm/IR/RuntimeLibcalls.h

@@ -174,6 +174,10 @@ struct RuntimeLibcallsInfo {
            (TT.isAndroid() && !TT.isAndroidVersionLT(9));
   }
 
+  static bool hasSinCos_f32_f64(const Triple &TT) {
+    return hasSinCos(TT) || TT.isPS();
+  }
+
   LLVM_ABI void initDefaultLibCallImpls();
 
   /// Generated by tablegen.

llvm/include/llvm/IR/RuntimeLibcalls.td

@@ -17,12 +17,23 @@ class DuplicateLibcallImplWithPrefix<RuntimeLibcallImpl Impl, string prefix>
 
 /// Libcall Predicates
 def isOSDarwin : RuntimeLibcallPredicate<"TT.isOSDarwin()">;
+def isOSOpenBSD : RuntimeLibcallPredicate<"TT.isOSOpenBSD()">;
 def isOSWindows : RuntimeLibcallPredicate<"TT.isOSWindows()">;
+def isNotOSWindows : RuntimeLibcallPredicate<"!TT.isOSWindows()">;
+def isNotOSMSVCRT : RuntimeLibcallPredicate<"!TT.isOSMSVCRT()">;
+def isPS : RuntimeLibcallPredicate<"TT.isPS()">;
+def isNotOSWindowsOrIsCygwinMinGW
+  : RuntimeLibcallPredicate<"!TT.isOSWindows() || TT.isOSCygMing()">;
 
+
+def isGNUEnvironment : RuntimeLibcallPredicate<"TT.isGNUEnvironment()">;
 def darwinHasSinCosStret : RuntimeLibcallPredicate<"darwinHasSinCosStret(TT)">;
 def darwinHasExp10 : RuntimeLibcallPredicate<"darwinHasExp10(TT)">;
 def hasSinCos : RuntimeLibcallPredicate<"hasSinCos(TT)">;
 
+// FIXME: Way to combine predicates
+def hasSinCos_f32_f64 : RuntimeLibcallPredicate<"hasSinCos_f32_f64(TT)">;
+
 //--------------------------------------------------------------------
 // Declare all kinds of used libcalls
 //--------------------------------------------------------------------
@@ -514,11 +525,13 @@ def __divxf3 : RuntimeLibcallImpl<DIV_F80>;
 def __divtf3 : RuntimeLibcallImpl<DIV_F128>;
 def __gcc_qdiv : RuntimeLibcallImpl<DIV_PPCF128>;
 
+defset list<RuntimeLibcallImpl> PowiLibcallImpls = {
 def __powisf2 : RuntimeLibcallImpl<POWI_F32>;
 def __powidf2 : RuntimeLibcallImpl<POWI_F64>;
 def __powixf2 : RuntimeLibcallImpl<POWI_F80>;
 def __powitf2_f128 : RuntimeLibcallImpl<POWI_F128, "__powitf2">;
 def __powitf2_ppc128 : RuntimeLibcallImpl<POWI_PPCF128, "__powitf2">;
+}
 
 // Conversion
 def __extendbfsf2 : RuntimeLibcallImpl<FPEXT_BF16_F32>;
@@ -1088,6 +1101,29 @@ defvar LibmHasSinCosF80 = LibcallImpls<(add sincos_f80), hasSinCos>;
 defvar LibmHasSinCosF128 = LibcallImpls<(add sincos_f128), hasSinCos>;
 defvar LibmHasSinCosPPCF128 = LibcallImpls<(add sincos_ppcf128), hasSinCos>;
 
+defvar WindowsMathRemovals = [
+  ldexpf, ldexp_f80, ldexp_f128, ldexp_ppcf128,
+  frexpf, frexp_f80, frexp_f128, frexp_ppcf128
+];
+
+defvar MostPowI = !listremove(PowiLibcallImpls, [__powitf2_f128]);
+defvar WindowsExclusions = !listconcat(WindowsMathRemovals, MostPowI);
+
+// Targets which support windows should start with these as a base and
+// add in calls for other OSes
+defvar Win32DefaultLibcallImpls = !listremove(DefaultLibcallImpls32, WindowsExclusions);
+defvar Win64DefaultLibcallImpls = !listremove(DefaultLibcallImpls64, WindowsExclusions);
+
+defvar LibmHasFrexpF32 = LibcallImpls<(add frexpf), isNotOSWindowsOrIsCygwinMinGW>;
+defvar LibmHasLdexpF32 = LibcallImpls<(add ldexpf), isNotOSWindowsOrIsCygwinMinGW>;
+
+defvar LibmHasFrexpF80 = LibcallImpls<(add frexp_f80), isNotOSWindowsOrIsCygwinMinGW>;
+defvar LibmHasLdexpF80 = LibcallImpls<(add ldexp_f80), isNotOSWindowsOrIsCygwinMinGW>;
+
+defvar LibmHasFrexpF128 = LibcallImpls<(add frexp_f128), isNotOSWindowsOrIsCygwinMinGW>;
+defvar LibmHasLdexpF128 = LibcallImpls<(add ldexp_f128), isNotOSWindowsOrIsCygwinMinGW>;
+
+
 //===----------------------------------------------------------------------===//
 // Objective-C Runtime Libcalls
 //===----------------------------------------------------------------------===//
@@ -1155,7 +1191,10 @@ def isAArch64_ILP64  : RuntimeLibcallPredicate<"TT.isAArch64(64)">;
 
 def AArch64SystemLibrary : SystemRuntimeLibrary<
   isAArch64_ExceptArm64EC,
-  (add DefaultRuntimeLibcallImpls,
+  (add Win64DefaultLibcallImpls,
+       LibcallImpls<(add __powisf2, __powidf2), isNotOSMSVCRT>,
+       LibmHasFrexpF32, LibmHasLdexpF32,
+       LibmHasFrexpF128, LibmHasLdexpF128,
        AArch64LibcallImpls,
        LibcallImpls<(add Int128RTLibcalls), isAArch64_ILP64>,
        LibcallImpls<(add bzero), isOSDarwin>,
@@ -1165,7 +1204,7 @@ def AArch64SystemLibrary : SystemRuntimeLibrary<
 
 // Prepend a # to every name
 defset list<RuntimeLibcallImpl> WinArm64ECDefaultRuntimeLibcallImpls = {
-  foreach libcall = DefaultLibcallImpls64 in {
+  foreach libcall = Win64DefaultLibcallImpls in {
     def arm64ec_#libcall : DuplicateLibcallImplWithPrefix<libcall, "#">;
   }
 
@@ -1422,11 +1461,15 @@ def isARMOrThumb : RuntimeLibcallPredicate<"TT.isARM() || TT.isThumb()">;
 
 def ARMSystemLibrary
     : SystemRuntimeLibrary<isARMOrThumb,
-      (add DefaultLibcallImpls32,
+      (add Win32DefaultLibcallImpls,
+           LibcallImpls<(add __powisf2, __powidf2), isNotOSMSVCRT>,
+           LibmHasFrexpF32, LibmHasLdexpF32,
+           LibmHasFrexpF128, LibmHasLdexpF128,
            WindowARMDivRemCalls,
            WindowARMFPIntCasts,
            AEABIDivRemCalls,
            DarwinSinCosStret, DarwinExp10,
+           LibmHasSinCosF32, LibmHasSinCosF64, LibmHasSinCosF128,
 
            // Use divmod compiler-rt calls for iOS 5.0 and later.
            LibcallImpls<(add __divmodsi4, __udivmodsi4),
@@ -1920,6 +1963,8 @@ def PPCSystemLibrary
            __extendkftf2, __trunctfkf2,
            DefaultRuntimeLibcallImpls_ppcf128,
            LibmF128Libcalls, AIX32Calls, AIX64Calls,
+           LibmHasSinCosF32, LibmHasSinCosF64, LibmHasSinCosF128,
+           LibmHasSinCosPPCF128,
            AvailableIf<memcpy, isNotAIX>,
            LibcallImpls<(add Int128RTLibcalls), isPPC64>)>;
 
@@ -2007,28 +2052,59 @@ def SPARCSystemLibrary
 // Windows Runtime Libcalls
 //===----------------------------------------------------------------------===//
 
-// TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment()
-
+defset list<RuntimeLibcallImpl> WindowsDivRemMulLibcalls = {
 def _alldiv : RuntimeLibcallImpl<SDIV_I64>;
 def _aulldiv : RuntimeLibcallImpl<UDIV_I64>;
 def _allrem : RuntimeLibcallImpl<SREM_I64>;
 def _aullrem : RuntimeLibcallImpl<UREM_I64>;
 def _allmul : RuntimeLibcallImpl<MUL_I64>;
+}
 
 //===----------------------------------------------------------------------===//
 // X86 Runtime Libcalls
 //===----------------------------------------------------------------------===//
 
 def isX86_32 : RuntimeLibcallPredicate<"TT.getArch() == Triple::x86">;
 def isX86_64 : RuntimeLibcallPredicate<"TT.getArch() == Triple::x86_64">;
+def isX86 : RuntimeLibcallPredicate<"TT.isX86()">;
+
+// Some darwins have an optimized __bzero/bzero function.
+def darwinHas__bzero : RuntimeLibcallPredicate<"TT.isMacOSX() && !TT.isMacOSXVersionLT(10, 6)">;
+
+// Use the f128 variants of math functions on x86
+defvar X86_F128_Libcalls = LibcallImpls<(add LibmF128Libcalls, LibmF128FiniteLibcalls), isGNUEnvironment>;
+
+defvar SinCosF32F64Libcalls = LibcallImpls<(add sincosf, sincos), hasSinCos_f32_f64>;
+
+defvar X86CommonLibcalls =
+  (add DarwinSinCosStret, DarwinExp10,
+       X86_F128_Libcalls,
+       sincos_f80,
+       LibmHasSinCosF80, // FIXME: Depends on long double
+       SinCosF32F64Libcalls,
+       LibcallImpls<(add __bzero), darwinHas__bzero>,
+       LibmHasFrexpF32, LibmHasLdexpF32,
+       LibmHasFrexpF80, LibmHasLdexpF80,
+       DefaultRuntimeLibcallImpls_f80,
+       // MSVCRT doesn't have powi
+       // FIXME: It's almost certainly correct that MSVCRT has
+       // __powitf2_f128, but at least one test is relying on it.
+       __powitf2_f128,
+       LibcallImpls<(add MostPowI), isNotOSMSVCRT>
+);
+
+defvar Windows32DivRemMulCalls =
+  LibcallImpls<(add WindowsDivRemMulLibcalls),
+  RuntimeLibcallPredicate<"TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment()">>;
 
 def X86_32SystemLibrary
     : SystemRuntimeLibrary<isX86_32,
-      (add DefaultLibcallImpls32, DefaultRuntimeLibcallImpls_f80)>;
+      (add X86CommonLibcalls,
+           Windows32DivRemMulCalls, Win32DefaultLibcallImpls)>;
 
 def X86_64SystemLibrary
     : SystemRuntimeLibrary<isX86_64,
-      (add DefaultLibcallImpls64, DefaultRuntimeLibcallImpls_f80)>;
+      (add X86CommonLibcalls, Win64DefaultLibcallImpls, Int128RTLibcalls)>;
 
 //===----------------------------------------------------------------------===//
 // XCore Runtime Libcalls

llvm/lib/IR/RuntimeLibcalls.cpp

@@ -62,69 +62,6 @@ static void setARMLibcallNames(RuntimeLibcallsInfo &Info, const Triple &TT,
     Info.setLibcallImplCallingConv(Impl, CallingConv::ARM_AAPCS);
 }
 
-static void setLongDoubleIsF128Libm(RuntimeLibcallsInfo &Info,
-                                    bool FiniteOnlyFuncs = false) {
-  Info.setLibcallImpl(RTLIB::REM_F128, RTLIB::fmodf128);
-  Info.setLibcallImpl(RTLIB::FMA_F128, RTLIB::fmaf128);
-  Info.setLibcallImpl(RTLIB::SQRT_F128, RTLIB::sqrtf128);
-  Info.setLibcallImpl(RTLIB::CBRT_F128, RTLIB::cbrtf128);
-  Info.setLibcallImpl(RTLIB::LOG_F128, RTLIB::logf128);
-  Info.setLibcallImpl(RTLIB::LOG2_F128, RTLIB::log2f128);
-  Info.setLibcallImpl(RTLIB::LOG10_F128, RTLIB::log10f128);
-  Info.setLibcallImpl(RTLIB::EXP_F128, RTLIB::expf128);
-  Info.setLibcallImpl(RTLIB::EXP2_F128, RTLIB::exp2f128);
-  Info.setLibcallImpl(RTLIB::EXP10_F128, RTLIB::exp10f128);
-  Info.setLibcallImpl(RTLIB::SIN_F128, RTLIB::sinf128);
-  Info.setLibcallImpl(RTLIB::COS_F128, RTLIB::cosf128);
-  Info.setLibcallImpl(RTLIB::TAN_F128, RTLIB::tanf128);
-  Info.setLibcallImpl(RTLIB::SINCOS_F128, RTLIB::sincosf128);
-  Info.setLibcallImpl(RTLIB::ASIN_F128, RTLIB::asinf128);
-  Info.setLibcallImpl(RTLIB::ACOS_F128, RTLIB::acosf128);
-  Info.setLibcallImpl(RTLIB::ATAN_F128, RTLIB::atanf128);
-  Info.setLibcallImpl(RTLIB::ATAN2_F128, RTLIB::atan2f128);
-  Info.setLibcallImpl(RTLIB::SINH_F128, RTLIB::sinhf128);
-  Info.setLibcallImpl(RTLIB::COSH_F128, RTLIB::coshf128);
-  Info.setLibcallImpl(RTLIB::TANH_F128, RTLIB::tanhf128);
-  Info.setLibcallImpl(RTLIB::POW_F128, RTLIB::powf128);
-  Info.setLibcallImpl(RTLIB::CEIL_F128, RTLIB::ceilf128);
-  Info.setLibcallImpl(RTLIB::TRUNC_F128, RTLIB::truncf128);
-  Info.setLibcallImpl(RTLIB::RINT_F128, RTLIB::rintf128);
-  Info.setLibcallImpl(RTLIB::NEARBYINT_F128, RTLIB::nearbyintf128);
-  Info.setLibcallImpl(RTLIB::ROUND_F128, RTLIB::roundf128);
-  Info.setLibcallImpl(RTLIB::ROUNDEVEN_F128, RTLIB::roundevenf128);
-  Info.setLibcallImpl(RTLIB::FLOOR_F128, RTLIB::floorf128);
-  Info.setLibcallImpl(RTLIB::COPYSIGN_F128, RTLIB::copysignf128);
-  Info.setLibcallImpl(RTLIB::FMIN_F128, RTLIB::fminf128);
-  Info.setLibcallImpl(RTLIB::FMAX_F128, RTLIB::fmaxf128);
-  Info.setLibcallImpl(RTLIB::FMINIMUM_F128, RTLIB::fminimumf128);
-  Info.setLibcallImpl(RTLIB::FMAXIMUM_F128, RTLIB::fmaximumf128);
-  Info.setLibcallImpl(RTLIB::FMINIMUM_NUM_F128, RTLIB::fminimum_numf128);
-  Info.setLibcallImpl(RTLIB::FMAXIMUM_NUM_F128, RTLIB::fmaximum_numf128);
-  Info.setLibcallImpl(RTLIB::LROUND_F128, RTLIB::lroundf128);
-  Info.setLibcallImpl(RTLIB::LLROUND_F128, RTLIB::llroundf128);
-  Info.setLibcallImpl(RTLIB::LRINT_F128, RTLIB::lrintf128);
-  Info.setLibcallImpl(RTLIB::LLRINT_F128, RTLIB::llrintf128);
-  Info.setLibcallImpl(RTLIB::LDEXP_F128, RTLIB::ldexpf128);
-  Info.setLibcallImpl(RTLIB::FREXP_F128, RTLIB::frexpf128);
-  Info.setLibcallImpl(RTLIB::MODF_F128, RTLIB::modff128);
-
-  if (FiniteOnlyFuncs) {
-    Info.setLibcallImpl(RTLIB::LOG_FINITE_F128, RTLIB::__logf128_finite);
-    Info.setLibcallImpl(RTLIB::LOG2_FINITE_F128, RTLIB::__log2f128_finite);
-    Info.setLibcallImpl(RTLIB::LOG10_FINITE_F128, RTLIB::__log10f128_finite);
-    Info.setLibcallImpl(RTLIB::EXP_FINITE_F128, RTLIB::__expf128_finite);
-    Info.setLibcallImpl(RTLIB::EXP2_FINITE_F128, RTLIB::__exp2f128_finite);
-    Info.setLibcallImpl(RTLIB::POW_FINITE_F128, RTLIB::__powf128_finite);
-  } else {
-    Info.setLibcallImpl(RTLIB::LOG_FINITE_F128, RTLIB::Unsupported);
-    Info.setLibcallImpl(RTLIB::LOG2_FINITE_F128, RTLIB::Unsupported);
-    Info.setLibcallImpl(RTLIB::LOG10_FINITE_F128, RTLIB::Unsupported);
-    Info.setLibcallImpl(RTLIB::EXP_FINITE_F128, RTLIB::Unsupported);
-    Info.setLibcallImpl(RTLIB::EXP2_FINITE_F128, RTLIB::Unsupported);
-    Info.setLibcallImpl(RTLIB::POW_FINITE_F128, RTLIB::Unsupported);
-  }
-}
-
 void RTLIB::RuntimeLibcallsInfo::initDefaultLibCallImpls() {
   std::memcpy(LibcallImpls, DefaultLibcallImpls, sizeof(LibcallImpls));
   static_assert(sizeof(LibcallImpls) == sizeof(DefaultLibcallImpls),
@@ -143,10 +80,6 @@ void RuntimeLibcallsInfo::initLibcalls(const Triple &TT,
   if (TT.isAMDGPU() || TT.isNVPTX() || TT.isWasm())
     return;
 
-  // Use the f128 variants of math functions on x86
-  if (TT.isX86() && TT.isGNUEnvironment())
-    setLongDoubleIsF128Libm(*this, /*FiniteOnlyFuncs=*/true);
-
   if (TT.isX86() || TT.isVE() || TT.isARM() || TT.isThumb()) {
     if (ExceptionModel == ExceptionHandling::SjLj)
       setLibcallImpl(RTLIB::UNWIND_RESUME, RTLIB::_Unwind_SjLj_Resume);
@@ -160,91 +93,40 @@ void RuntimeLibcallsInfo::initLibcalls(const Triple &TT,
     setLibcallImpl(RTLIB::FPEXT_F16_F32, RTLIB::__extendhfsf2);
     setLibcallImpl(RTLIB::FPROUND_F32_F16, RTLIB::__truncsfhf2);
 
-    // Some darwins have an optimized __bzero/bzero function.
-    if (TT.isX86()) {
-      if (TT.isMacOSX() && !TT.isMacOSXVersionLT(10, 6))
-        setLibcallImpl(RTLIB::BZERO, RTLIB::__bzero);
-    }
-
-    if (darwinHasSinCosStret(TT)) {
-      setLibcallImpl(RTLIB::SINCOS_STRET_F32, RTLIB::__sincosf_stret);
-      setLibcallImpl(RTLIB::SINCOS_STRET_F64, RTLIB::__sincos_stret);
-      if (TT.isWatchABI()) {
-        setLibcallImplCallingConv(RTLIB::__sincosf_stret,
-                                  CallingConv::ARM_AAPCS_VFP);
-        setLibcallImplCallingConv(RTLIB::__sincos_stret,
-                                  CallingConv::ARM_AAPCS_VFP);
-      }
+    if (TT.isWatchABI()) {
+      setLibcallImplCallingConv(RTLIB::__sincosf_stret,
+                                CallingConv::ARM_AAPCS_VFP);
+      setLibcallImplCallingConv(RTLIB::__sincos_stret,
+                                CallingConv::ARM_AAPCS_VFP);
     }
 
-    if (darwinHasExp10(TT)) {
-      setLibcallImpl(RTLIB::EXP10_F32, RTLIB::__exp10f);
-      setLibcallImpl(RTLIB::EXP10_F64, RTLIB::__exp10);
-    } else {
+    if (!darwinHasExp10(TT)) {
+      // FIXME: Remove exp10 from default set
       setLibcallImpl(RTLIB::EXP10_F32, RTLIB::Unsupported);
       setLibcallImpl(RTLIB::EXP10_F64, RTLIB::Unsupported);
     }
   }
 
-  if (hasSinCos(TT)) {
-    setLibcallImpl(RTLIB::SINCOS_F32, RTLIB::sincosf);
-    setLibcallImpl(RTLIB::SINCOS_F64, RTLIB::sincos);
-    setLibcallImpl(RTLIB::SINCOS_F80, RTLIB::sincos_f80);
-    setLibcallImpl(RTLIB::SINCOS_F128, RTLIB::sincos_f128);
-    setLibcallImpl(RTLIB::SINCOS_PPCF128, RTLIB::sincos_ppcf128);
-  }
-
-  if (TT.isPS()) {
-    setLibcallImpl(RTLIB::SINCOS_F32, RTLIB::sincosf);
-    setLibcallImpl(RTLIB::SINCOS_F64, RTLIB::sincos);
-  }
-
   if (TT.isOSOpenBSD()) {
     setLibcallImpl(RTLIB::STACKPROTECTOR_CHECK_FAIL, RTLIB::Unsupported);
   }
 
-  if (TT.isOSWindows() && !TT.isOSCygMing()) {
-    setLibcallImpl(RTLIB::LDEXP_F32, RTLIB::Unsupported);
-    setLibcallImpl(RTLIB::LDEXP_F80, RTLIB::Unsupported);
-    setLibcallImpl(RTLIB::LDEXP_F128, RTLIB::Unsupported);
-    setLibcallImpl(RTLIB::LDEXP_PPCF128, RTLIB::Unsupported);
-
-    setLibcallImpl(RTLIB::FREXP_F32, RTLIB::Unsupported);
-    setLibcallImpl(RTLIB::FREXP_F80, RTLIB::Unsupported);
-    setLibcallImpl(RTLIB::FREXP_F128, RTLIB::Unsupported);
-    setLibcallImpl(RTLIB::FREXP_PPCF128, RTLIB::Unsupported);
-  }
+  // Skip default manual processing for targets that have been fully ported to
+  // tablegen for now. Eventually the rest of this should be deleted.
+  if (TT.isX86() || TT.isAArch64() || TT.isWasm())
+    return;
 
-  if (TT.isOSMSVCRT()) {
-    // MSVCRT doesn't have powi; fall back to pow
-    setLibcallImpl(RTLIB::POWI_F32, RTLIB::Unsupported);
-    setLibcallImpl(RTLIB::POWI_F64, RTLIB::Unsupported);
+  if (TT.isARM() || TT.isThumb()) {
+    setARMLibcallNames(*this, TT, FloatABI, EABIVersion);
+    return;
   }
 
-  // Setup Windows compiler runtime calls.
-  if (TT.getArch() == Triple::x86 &&
-      (TT.isWindowsMSVCEnvironment() || TT.isWindowsItaniumEnvironment())) {
-    static const struct {
-      const RTLIB::Libcall Op;
-      const RTLIB::LibcallImpl Impl;
-      const CallingConv::ID CC;
-    } LibraryCalls[] = {
-        {RTLIB::SDIV_I64, RTLIB::_alldiv, CallingConv::X86_StdCall},
-        {RTLIB::UDIV_I64, RTLIB::_aulldiv, CallingConv::X86_StdCall},
-        {RTLIB::SREM_I64, RTLIB::_allrem, CallingConv::X86_StdCall},
-        {RTLIB::UREM_I64, RTLIB::_aullrem, CallingConv::X86_StdCall},
-        {RTLIB::MUL_I64, RTLIB::_allmul, CallingConv::X86_StdCall},
-    };
-
-    for (const auto &LC : LibraryCalls) {
-      setLibcallImpl(LC.Op, LC.Impl);
-      setLibcallImplCallingConv(LC.Impl, LC.CC);
-    }
+  if (hasSinCos(TT)) {
+    setLibcallImpl(RTLIB::SINCOS_F32, RTLIB::sincosf);
+    setLibcallImpl(RTLIB::SINCOS_F64, RTLIB::sincos);
+    setLibcallImpl(RTLIB::SINCOS_F128, RTLIB::sincos_f128);
   }
 
-  if (TT.isARM() || TT.isThumb())
-    setARMLibcallNames(*this, TT, FloatABI, EABIVersion);
-
   // These libcalls are only available in compiler-rt, not libgcc.
   if (TT.isArch64Bit()) {
     setLibcallImpl(RTLIB::SHL_I128, RTLIB::__ashlti3);