ARM: implement ldrex, strex and clrex intrinsics

Intrinsics already existed for the 64-bit variants, so these support operations
of size at most 32-bits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186392 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 0 deletions

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 3648199989..83fb175ca5 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -10838,6 +10838,30 @@ bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
     Info.writeMem = true;
     return true;
   }
+  case Intrinsic::arm_ldrex: {
+    PointerType *PtrTy = cast<PointerType>(I.getArgOperand(0)->getType());
+    Info.opc = ISD::INTRINSIC_W_CHAIN;
+    Info.memVT = MVT::getVT(PtrTy->getElementType());
+    Info.ptrVal = I.getArgOperand(0);
+    Info.offset = 0;
+    Info.align = getDataLayout()->getABITypeAlignment(PtrTy->getElementType());
+    Info.vol = true;
+    Info.readMem = true;
+    Info.writeMem = false;
+    return true;
+  }
+  case Intrinsic::arm_strex: {
+    PointerType *PtrTy = cast<PointerType>(I.getArgOperand(1)->getType());
+    Info.opc = ISD::INTRINSIC_W_CHAIN;
+    Info.memVT = MVT::getVT(PtrTy->getElementType());
+    Info.ptrVal = I.getArgOperand(1);
+    Info.offset = 0;
+    Info.align = getDataLayout()->getABITypeAlignment(PtrTy->getElementType());
+    Info.vol = true;
+    Info.readMem = false;
+    Info.writeMem = true;
+    return true;
+  }
   case Intrinsic::arm_strexd: {
     Info.opc = ISD::INTRINSIC_W_CHAIN;
     Info.memVT = MVT::i64;