[llvm] [CodeGen] Remove unused functions (NFC) (PR #228844)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/228844

LiveVariables::replaceKillInstruction: The last caller was removed on
October 1, 2026 in commit 8068182dd6fb1a8efae0291db1d2462d29025cd1.

TargetLoweringBase::getSupportedLibcallImpl: The last caller was
removed on October 24, 2025 in commit
26450db480761c0fedf319fc350178798ce7e547.

Assisted-by: Antigravity


>From acb9f6bdcf3f2b991bd576d6e4bc56732b1bb928 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 3 Oct 2026 08:30:42 -0700
Subject: [PATCH] [CodeGen] Remove unused functions (NFC)

LiveVariables::replaceKillInstruction: The last caller was removed on
October 1, 2026 in commit 8068182dd6fb1a8efae0291db1d2462d29025cd1.

TargetLoweringBase::getSupportedLibcallImpl: The last caller was
removed on October 24, 2025 in commit
26450db480761c0fedf319fc350178798ce7e547.

Assisted-by: Antigravity
---
 llvm/include/llvm/CodeGen/LiveVariables.h  | 5 -----
 llvm/include/llvm/CodeGen/TargetLowering.h | 6 ------
 llvm/lib/CodeGen/LiveVariables.cpp         | 8 --------
 3 files changed, 19 deletions(-)

diff --git a/llvm/include/llvm/CodeGen/LiveVariables.h b/llvm/include/llvm/CodeGen/LiveVariables.h
index c6e0c8419f35b6..4b06c5b48335f5 100644
--- a/llvm/include/llvm/CodeGen/LiveVariables.h
+++ b/llvm/include/llvm/CodeGen/LiveVariables.h
@@ -192,11 +192,6 @@ class LiveVariables {
   /// machine function to be in SSA form.
   LLVM_ABI void recomputeForSingleDefVirtReg(Register Reg);
 
-  /// replaceKillInstruction - Update register kill info by replacing a kill
-  /// instruction with a new one.
-  LLVM_ABI void replaceKillInstruction(Register Reg, MachineInstr &OldMI,
-                                       MachineInstr &NewMI);
-
   /// addVirtualRegisterKilled - Add information about the fact that the
   /// specified register is killed after being used by the specified
   /// instruction. If AddIfNotFound is true, add a implicit operand if it's
diff --git a/llvm/include/llvm/CodeGen/TargetLowering.h b/llvm/include/llvm/CodeGen/TargetLowering.h
index 91221f31b49a39..ab92757abeb66b 100644
--- a/llvm/include/llvm/CodeGen/TargetLowering.h
+++ b/llvm/include/llvm/CodeGen/TargetLowering.h
@@ -3785,12 +3785,6 @@ class LLVM_ABI TargetLoweringBase {
 
   RTLIB::LibcallImpl getMemcpyImpl() const { return Libcalls.getMemcpyImpl(); }
 
-  /// Check if this is valid libcall for the current module, otherwise
-  /// RTLIB::Unsupported.
-  RTLIB::LibcallImpl getSupportedLibcallImpl(StringRef FuncName) const {
-    return RuntimeLibcallInfo.getSupportedLibcallImpl(FuncName);
-  }
-
   /// Get the CallingConv that should be used for the specified libcall
   /// implementation.
   CallingConv::ID getLibcallImplCallingConv(RTLIB::LibcallImpl Call) const {
diff --git a/llvm/lib/CodeGen/LiveVariables.cpp b/llvm/lib/CodeGen/LiveVariables.cpp
index 1d6168618b7513..5ce12c481bf161 100644
--- a/llvm/lib/CodeGen/LiveVariables.cpp
+++ b/llvm/lib/CodeGen/LiveVariables.cpp
@@ -729,14 +729,6 @@ void LiveVariables::recomputeForSingleDefVirtReg(Register Reg) {
   }
 }
 
-/// replaceKillInstruction - Update register kill info by replacing a kill
-/// instruction with a new one.
-void LiveVariables::replaceKillInstruction(Register Reg, MachineInstr &OldMI,
-                                           MachineInstr &NewMI) {
-  VarInfo &VI = getVarInfo(Reg);
-  llvm::replace(VI.Kills, &OldMI, &NewMI);
-}
-
 /// removeVirtualRegistersKilled - Remove all killed info for the specified
 /// instruction.
 void LiveVariables::removeVirtualRegistersKilled(MachineInstr &MI) {