2 files changed, 22 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86LegalizerInfo.cpp b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
index 00fb1b57385..96900565e23 100644
--- a/llvm/lib/Target/X86/X86LegalizerInfo.cpp
+++ b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
@@ -13,6 +13,7 @@
 #include "X86LegalizerInfo.h"
 #include "X86Subtarget.h"
 #include "X86TargetMachine.h"
+#include "llvm/CodeGen/GlobalISel/LegalizerHelper.h"
 #include "llvm/CodeGen/TargetOpcodes.h"
 #include "llvm/CodeGen/ValueTypes.h"
 #include "llvm/IR/DerivedTypes.h"
@@ -84,6 +85,24 @@ X86LegalizerInfo::X86LegalizerInfo(const X86Subtarget &STI,
   verify(*STI.getInstrInfo());
 }
 
+bool X86LegalizerInfo::legalizeIntrinsic(MachineInstr &MI,
+                                         MachineRegisterInfo &MRI,
+                                         MachineIRBuilder &MIRBuilder) const {
+  switch (MI.getIntrinsicID()) {
+  case Intrinsic::memcpy:
+  case Intrinsic::memset:
+  case Intrinsic::memmove:
+    if (createMemLibcall(MIRBuilder, MRI, MI) ==
+        LegalizerHelper::UnableToLegalize)
+      return false;
+    MI.eraseFromParent();
+    return true;
+  default:
+    break;
+  }
+  return true;
+}
+
 void X86LegalizerInfo::setLegalizerInfo32bit() {
 
   const LLT p0 = LLT::pointer(0, TM.getPointerSizeInBits(0));
diff --git a/llvm/lib/Target/X86/X86LegalizerInfo.h b/llvm/lib/Target/X86/X86LegalizerInfo.h
index d21707b9ab9..7a0f13fb5ae 100644
--- a/llvm/lib/Target/X86/X86LegalizerInfo.h
+++ b/llvm/lib/Target/X86/X86LegalizerInfo.h
@@ -32,6 +32,9 @@ private:
 public:
   X86LegalizerInfo(const X86Subtarget &STI, const X86TargetMachine &TM);
 
+  bool legalizeIntrinsic(MachineInstr &MI, MachineRegisterInfo &MRI,
+                         MachineIRBuilder &MIRBuilder) const override;
+
 private:
   void setLegalizerInfo32bit();
   void setLegalizerInfo64bit();