Allow targets to define libcall names for mem(cpy,set,move) intrinsics, rather than hardcoding them in DAG lowering.

llvm-svn: 77586

3 files changed, 14 insertions, 3 deletions

diff --git a/llvm/include/llvm/CodeGen/RuntimeLibcalls.h b/llvm/include/llvm/CodeGen/RuntimeLibcalls.h
index 7f2c8bc3684..ae708c912cc 100644
--- a/llvm/include/llvm/CodeGen/RuntimeLibcalls.h
+++ b/llvm/include/llvm/CodeGen/RuntimeLibcalls.h
@@ -224,6 +224,11 @@ namespace RTLIB {
     O_F32,
     O_F64,
 
+    // MEMORY
+    MEMCPY,
+    MEMSET,
+    MEMMOVE,
+
     // EXCEPTION HANDLING
     UNWIND_RESUME,
 
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index eca726a1df9..480f837f3ee 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -3385,7 +3385,8 @@ SDValue SelectionDAG::getMemcpy(SDValue Chain, DebugLoc dl, SDValue Dst,
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
                     false, false, false, false, 0, CallingConv::C, false,
-                    getExternalSymbol("memcpy", TLI.getPointerTy()),
+                    getExternalSymbol(TLI.getLibcallName(RTLIB::MEMCPY), 
+                                      TLI.getPointerTy()),
                     Args, *this, dl);
   return CallResult.second;
 }
@@ -3431,7 +3432,8 @@ SDValue SelectionDAG::getMemmove(SDValue Chain, DebugLoc dl, SDValue Dst,
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
                     false, false, false, false, 0, CallingConv::C, false,
-                    getExternalSymbol("memmove", TLI.getPointerTy()),
+                    getExternalSymbol(TLI.getLibcallName(RTLIB::MEMMOVE), 
+                                      TLI.getPointerTy()),
                     Args, *this, dl);
   return CallResult.second;
 }
@@ -3483,7 +3485,8 @@ SDValue SelectionDAG::getMemset(SDValue Chain, DebugLoc dl, SDValue Dst,
   std::pair<SDValue,SDValue> CallResult =
     TLI.LowerCallTo(Chain, Type::VoidTy,
                     false, false, false, false, 0, CallingConv::C, false,
-                    getExternalSymbol("memset", TLI.getPointerTy()),
+                    getExternalSymbol(TLI.getLibcallName(RTLIB::MEMSET), 
+                                      TLI.getPointerTy()),
                     Args, *this, dl);
   return CallResult.second;
 }
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 85b47a001eb..21b8cce77f9 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -241,6 +241,9 @@ static void InitLibcallNames(const char **Names) {
   Names[RTLIB::UO_F64] = "__unorddf2";
   Names[RTLIB::O_F32] = "__unordsf2";
   Names[RTLIB::O_F64] = "__unorddf2";
+  Names[RTLIB::MEMCPY] = "memcpy";
+  Names[RTLIB::MEMMOVE] = "memmove";
+  Names[RTLIB::MEMSET] = "memset";
   Names[RTLIB::UNWIND_RESUME] = "_Unwind_Resume";
 }