RuntimeLibcalls: Add entries for some exception related functions

[arsenm]

SjLjEHPrepare and WasmEHPrepare directly emit calls to these by
name, and these are not tracked in RuntimeLibcalls. It will be easier
to fix this when RuntimeLibcalls is turned into an analysis, so just
add the entries for now.

[arsenm]

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• SafeStack: Check if __safestack_pointer_address is available #147917
• SafeStack: Emit __safestack_pointer_address call through RuntimeLibcalls #147916
• SafeStack: Emit call to __stack_chk_fail through RuntimeLibcalls #147915
• RuntimeLibcalls: Add entries for some exception related functions #147914 👈 (View in Graphite)
• StackProtector: Use RuntimeLibcalls to query libcall names #147913
• RuntimeLibcalls: Add some tests for OpenBSD stack protectors #147888
• main

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[llvmbot]

@llvm/pr-subscribers-llvm-ir

Author: Matt Arsenault (arsenm)

Changes

SjLjEHPrepare and WasmEHPrepare directly emit calls to these by
name, and these are not tracked in RuntimeLibcalls. It will be easier
to fix this when RuntimeLibcalls is turned into an analysis, so just
add the entries for now.

---

Full diff: https://github.com/llvm/llvm-project/pull/147914.diff

1 Files Affected:

• (modified) llvm/include/llvm/IR/RuntimeLibcalls.td (+6)

diff --git a/llvm/include/llvm/IR/RuntimeLibcalls.td b/llvm/include/llvm/IR/RuntimeLibcalls.td
index f7598979ca4c5..29de1206a8974 100644
--- a/llvm/include/llvm/IR/RuntimeLibcalls.td
+++ b/llvm/include/llvm/IR/RuntimeLibcalls.td
@@ -263,6 +263,9 @@ foreach MemSize = [1, 2, 4, 8, 16] in {
 
 // Exception handling
 def UNWIND_RESUME : RuntimeLibcall;
+def UNWIND_REGISTER : RuntimeLibcall;
+def UNWIND_UNREGISTER : RuntimeLibcall;
+def UNWIND_CALL_PERSONALITY : RuntimeLibcall;
 def CXA_END_CLEANUP : RuntimeLibcall;
 
 // Note: there are two sets of atomics libcalls; see
@@ -918,6 +921,9 @@ defm sincos : LibmLongDoubleLibCall;
 def bzero : RuntimeLibcallImpl<BZERO>;
 def __bzero : RuntimeLibcallImpl<BZERO>;
 def _Unwind_SjLj_Resume : RuntimeLibcallImpl<UNWIND_RESUME>;
+def _Unwind_SjLj_Register : RuntimeLibcallImpl<UNWIND_REGISTER>;
+def _Unwind_SjLj_Unregister : RuntimeLibcallImpl<UNWIND_UNREGISTER>;
+def _Unwind_CallPersonality : RuntimeLibcallImpl<UNWIND_CALL_PERSONALITY>;
 
 // Used on OpenBSD
 def __stack_smash_handler : RuntimeLibcallImpl<STACK_SMASH_HANDLER>;