commit 5434b85d2c7a83d9cebae06dad2f9d630e9a3927
author Matt Arsenault <Matthew.Arsenault@amd.com> Thu Jun 12 17:38:52 2025 +0900
committer GitHub <noreply@github.com> Thu Jun 12 17:38:52 2025 +0900
tree 64c69580a12e2c4f33592aa794f2bdbf35378b63
parent 4079ed3c9e72d64746c5d3f05fc585d844c1e8a7

ARM: Remove fake entries for divrem libcalls (#143832)

This was defining aliases of the i32 divrem functions for the i8
and i16 cases. This is unnecessary and was unused. The divrem
candidate cases wouldn't have formed with illegal types in the
first place, so codegen wouldn't even query these.

llvm/lib/IR/RuntimeLibcalls.cpp

diff --git a/llvm/lib/IR/RuntimeLibcalls.cpp b/llvm/lib/IR/RuntimeLibcalls.cpp
index 331b319..d84c56f 100644
--- a/llvm/lib/IR/RuntimeLibcalls.cpp
+++ b/llvm/lib/IR/RuntimeLibcalls.cpp
@@ -41,13 +41,8 @@
         const char *const Name;
         const CallingConv::ID CC;
       } LibraryCalls[] = {
-          {RTLIB::SDIVREM_I8, "__rt_sdiv", CallingConv::ARM_AAPCS},
-          {RTLIB::SDIVREM_I16, "__rt_sdiv", CallingConv::ARM_AAPCS},
           {RTLIB::SDIVREM_I32, "__rt_sdiv", CallingConv::ARM_AAPCS},
           {RTLIB::SDIVREM_I64, "__rt_sdiv64", CallingConv::ARM_AAPCS},
-
-          {RTLIB::UDIVREM_I8, "__rt_udiv", CallingConv::ARM_AAPCS},
-          {RTLIB::UDIVREM_I16, "__rt_udiv", CallingConv::ARM_AAPCS},
           {RTLIB::UDIVREM_I32, "__rt_udiv", CallingConv::ARM_AAPCS},
           {RTLIB::UDIVREM_I64, "__rt_udiv64", CallingConv::ARM_AAPCS},
       };
@@ -62,13 +57,8 @@
         const char *const Name;
         const CallingConv::ID CC;
       } LibraryCalls[] = {
-          {RTLIB::SDIVREM_I8, "__aeabi_idivmod", CallingConv::ARM_AAPCS},
-          {RTLIB::SDIVREM_I16, "__aeabi_idivmod", CallingConv::ARM_AAPCS},
           {RTLIB::SDIVREM_I32, "__aeabi_idivmod", CallingConv::ARM_AAPCS},
           {RTLIB::SDIVREM_I64, "__aeabi_ldivmod", CallingConv::ARM_AAPCS},
-
-          {RTLIB::UDIVREM_I8, "__aeabi_uidivmod", CallingConv::ARM_AAPCS},
-          {RTLIB::UDIVREM_I16, "__aeabi_uidivmod", CallingConv::ARM_AAPCS},
           {RTLIB::UDIVREM_I32, "__aeabi_uidivmod", CallingConv::ARM_AAPCS},
           {RTLIB::UDIVREM_I64, "__aeabi_uldivmod", CallingConv::ARM_AAPCS},
       };