From 7c7aba6e5fef47a01a136be655b0a92cfd7090f6 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 16 Jun 2017 21:03:24 +0000
Subject: Vendor import of llvm trunk r305575:
 https://llvm.org/svn/llvm-project/llvm/trunk@305575

---
 lib/CodeGen/GlobalISel/MachineIRBuilder.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'lib/CodeGen/GlobalISel/MachineIRBuilder.cpp')

diff --git a/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp b/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
index 54ef7e5c5a1b..79d312fb52ca 100644
--- a/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
+++ b/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
@@ -191,6 +191,24 @@ MachineInstrBuilder MachineIRBuilder::buildGEP(unsigned Res, unsigned Op0,
       .addUse(Op1);
 }
 
+Optional<MachineInstrBuilder>
+MachineIRBuilder::materializeGEP(unsigned &Res, unsigned Op0,
+                                 const LLT &ValueTy, uint64_t Value) {
+  assert(Res == 0 && "Res is a result argument");
+  assert(ValueTy.isScalar()  && "invalid offset type");
+
+  if (Value == 0) {
+    Res = Op0;
+    return None;
+  }
+
+  Res = MRI->createGenericVirtualRegister(MRI->getType(Op0));
+  unsigned TmpReg = MRI->createGenericVirtualRegister(ValueTy);
+
+  buildConstant(TmpReg, Value);
+  return buildGEP(Res, Op0, TmpReg);
+}
+
 MachineInstrBuilder MachineIRBuilder::buildPtrMask(unsigned Res, unsigned Op0,
                                                    uint32_t NumBits) {
   assert(MRI->getType(Res).isPointer() &&
-- 
cgit v1.3