ARM: Move setting of more runtime libcalls to RuntimeLibcallInfo (#143826)

These are the easy cases that do not really depend on the subtarget,
other than for the deceptive predicates on the subtarget class. Most
of the rest of the cases here also do not, but this is obscured by
going through helper predicates added onto the subtarget which hide
dependence on TargetOptions.

Author: arsenm

llvm/lib/IR/RuntimeLibcalls.cpp

@@ -79,6 +79,34 @@ static void setARMLibcallNames(RuntimeLibcallsInfo &Info, const Triple &TT) {
       }
     }
   }
+
+  if (TT.isOSWindows()) {
+    static const struct {
+      const RTLIB::Libcall Op;
+      const char *const Name;
+      const CallingConv::ID CC;
+    } LibraryCalls[] = {
+        {RTLIB::FPTOSINT_F32_I64, "__stoi64", CallingConv::ARM_AAPCS_VFP},
+        {RTLIB::FPTOSINT_F64_I64, "__dtoi64", CallingConv::ARM_AAPCS_VFP},
+        {RTLIB::FPTOUINT_F32_I64, "__stou64", CallingConv::ARM_AAPCS_VFP},
+        {RTLIB::FPTOUINT_F64_I64, "__dtou64", CallingConv::ARM_AAPCS_VFP},
+        {RTLIB::SINTTOFP_I64_F32, "__i64tos", CallingConv::ARM_AAPCS_VFP},
+        {RTLIB::SINTTOFP_I64_F64, "__i64tod", CallingConv::ARM_AAPCS_VFP},
+        {RTLIB::UINTTOFP_I64_F32, "__u64tos", CallingConv::ARM_AAPCS_VFP},
+        {RTLIB::UINTTOFP_I64_F64, "__u64tod", CallingConv::ARM_AAPCS_VFP},
+    };
+
+    for (const auto &LC : LibraryCalls) {
+      Info.setLibcallName(LC.Op, LC.Name);
+      Info.setLibcallCallingConv(LC.Op, LC.CC);
+    }
+  }
+
+  // Use divmod compiler-rt calls for iOS 5.0 and later.
+  if (TT.isOSBinFormatMachO() && (!TT.isiOS() || !TT.isOSVersionLT(5, 0))) {
+    Info.setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
+    Info.setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
+  }
 }
 
 static void setMSP430Libcalls(RuntimeLibcallsInfo &Info, const Triple &TT) {

llvm/lib/Target/ARM/ARMISelLowering.cpp

@@ -708,36 +708,6 @@ ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM,
     }
   }
 
-  if (Subtarget->isTargetWindows()) {
-    static const struct {
-      const RTLIB::Libcall Op;
-      const char * const Name;
-      const CallingConv::ID CC;
-    } LibraryCalls[] = {
-      { RTLIB::FPTOSINT_F32_I64, "__stoi64", CallingConv::ARM_AAPCS_VFP },
-      { RTLIB::FPTOSINT_F64_I64, "__dtoi64", CallingConv::ARM_AAPCS_VFP },
-      { RTLIB::FPTOUINT_F32_I64, "__stou64", CallingConv::ARM_AAPCS_VFP },
-      { RTLIB::FPTOUINT_F64_I64, "__dtou64", CallingConv::ARM_AAPCS_VFP },
-      { RTLIB::SINTTOFP_I64_F32, "__i64tos", CallingConv::ARM_AAPCS_VFP },
-      { RTLIB::SINTTOFP_I64_F64, "__i64tod", CallingConv::ARM_AAPCS_VFP },
-      { RTLIB::UINTTOFP_I64_F32, "__u64tos", CallingConv::ARM_AAPCS_VFP },
-      { RTLIB::UINTTOFP_I64_F64, "__u64tod", CallingConv::ARM_AAPCS_VFP },
-    };
-
-    for (const auto &LC : LibraryCalls) {
-      setLibcallName(LC.Op, LC.Name);
-      setLibcallCallingConv(LC.Op, LC.CC);
-    }
-  }
-
-  // Use divmod compiler-rt calls for iOS 5.0 and later.
-  if (Subtarget->isTargetMachO() &&
-      !(Subtarget->isTargetIOS() &&
-        Subtarget->getTargetTriple().isOSVersionLT(5, 0))) {
-    setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
-    setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
-  }
-
   // The half <-> float conversion functions are always soft-float on
   // non-watchos platforms, but are needed for some targets which use a
   // hard-float calling convention by default.