ARM: Remove idiv runtime call aliases

Really only the i32 variants exist. We don't need synthetic
aliases for illegal types which will be promoted.

Author: arsenm

llvm/include/llvm/IR/RuntimeLibcalls.td

@@ -1399,13 +1399,9 @@ def __aeabi_lasr : RuntimeLibcallImpl<SRA_I64>; // CallingConv::ARM_AAPCS
 
 // Integer division functions
 // RTABI chapter 4.3.1
-def __aeabi_idiv__i8 : RuntimeLibcallImpl<SDIV_I8, "__aeabi_idiv">; // CallingConv::ARM_AAPCS
-def __aeabi_idiv__i16 : RuntimeLibcallImpl<SDIV_I16, "__aeabi_idiv">; // CallingConv::ARM_AAPCS
-def __aeabi_idiv__i32 : RuntimeLibcallImpl<SDIV_I32, "__aeabi_idiv">; // CallingConv::ARM_AAPCS
+def __aeabi_idiv : RuntimeLibcallImpl<SDIV_I32, "__aeabi_idiv">; // CallingConv::ARM_AAPCS
 def __aeabi_ldivmod : RuntimeLibcallImpl<SDIVREM_I64>; //  CallingConv::ARM_AAPCS
-def __aeabi_uidiv__i8 : RuntimeLibcallImpl<UDIV_I8, "__aeabi_uidiv">; // CallingConv::ARM_AAPCS
-def __aeabi_uidiv__i16 : RuntimeLibcallImpl<UDIV_I16, "__aeabi_uidiv">; // CallingConv::ARM_AAPCS
-def __aeabi_uidiv__i32 : RuntimeLibcallImpl<UDIV_I32, "__aeabi_uidiv">; // CallingConv::ARM_AAPCS
+def __aeabi_uidiv : RuntimeLibcallImpl<UDIV_I32, "__aeabi_uidiv">; // CallingConv::ARM_AAPCS
 def __aeabi_uldivmod : RuntimeLibcallImpl<UDIVREM_I64>; // CallingConv::ARM_AAPCS
 
 def __aeabi_idivmod : RuntimeLibcallImpl<SDIVREM_I32>; //  CallingConv::ARM_AAPCS

llvm/lib/IR/RuntimeLibcalls.cpp

@@ -47,11 +47,9 @@ static void setARMLibcallNames(RuntimeLibcallsInfo &Info, const Triple &TT,
       RTLIB::__aeabi_ui2f,        RTLIB::__aeabi_l2f,
       RTLIB::__aeabi_ul2f,        RTLIB::__aeabi_lmul,
       RTLIB::__aeabi_llsl,        RTLIB::__aeabi_llsr,
-      RTLIB::__aeabi_lasr,        RTLIB::__aeabi_idiv__i8,
-      RTLIB::__aeabi_idiv__i16,   RTLIB::__aeabi_idiv__i32,
+      RTLIB::__aeabi_lasr,        RTLIB::__aeabi_idiv,
       RTLIB::__aeabi_idivmod,     RTLIB::__aeabi_uidivmod,
-      RTLIB::__aeabi_ldivmod,     RTLIB::__aeabi_uidiv__i8,
-      RTLIB::__aeabi_uidiv__i16,  RTLIB::__aeabi_uidiv__i32,
+      RTLIB::__aeabi_ldivmod,     RTLIB::__aeabi_uidiv,
       RTLIB::__aeabi_uldivmod,    RTLIB::__aeabi_f2h,
       RTLIB::__aeabi_d2h,         RTLIB::__aeabi_h2f,
       RTLIB::__aeabi_memcpy,      RTLIB::__aeabi_memmove,

llvm/lib/Target/ARM/ARMISelLowering.cpp

@@ -669,13 +669,9 @@ ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM_,
 
       // Integer division functions
       // RTABI chapter 4.3.1
-      { RTLIB::SDIV_I8,  RTLIB::__aeabi_idiv__i8 },
-      { RTLIB::SDIV_I16, RTLIB::__aeabi_idiv__i16 },
-      { RTLIB::SDIV_I32, RTLIB::__aeabi_idiv__i32},
+      { RTLIB::SDIV_I32, RTLIB::__aeabi_idiv },
       { RTLIB::SDIV_I64, RTLIB::__aeabi_ldivmod },
-      { RTLIB::UDIV_I8,  RTLIB::__aeabi_uidiv__i8 },
-      { RTLIB::UDIV_I16, RTLIB::__aeabi_uidiv__i16 },
-      { RTLIB::UDIV_I32, RTLIB::__aeabi_uidiv__i32 },
+      { RTLIB::UDIV_I32, RTLIB::__aeabi_uidiv },
       { RTLIB::UDIV_I64, RTLIB::__aeabi_uldivmod },
     };
     // clang-format on