Add support for ARM ldrexd/strexd builtins
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132249 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 9d6c20f..2f4104d 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -1186,6 +1186,41 @@
Ops.begin(), Ops.end());
}
+ if (BuiltinID == ARM::BI__builtin_arm_ldrexd) {
+ Function *F = CGM.getIntrinsic(Intrinsic::arm_ldrexd);
+
+ Value *LdPtr = EmitScalarExpr(E->getArg(0));
+ Value *Val = Builder.CreateCall(F, LdPtr, "ldrexd");
+
+ Value *Val0 = Builder.CreateExtractValue(Val, 1);
+ Value *Val1 = Builder.CreateExtractValue(Val, 0);
+ Val0 = Builder.CreateZExt(Val0, Int64Ty);
+ Val1 = Builder.CreateZExt(Val1, Int64Ty);
+
+ Value *ShiftCst = llvm::ConstantInt::get(Int64Ty, 32);
+ Val = Builder.CreateShl(Val0, ShiftCst, "shl", true /* nuw */);
+ return Builder.CreateOr(Val, Val1);
+ }
+
+ if (BuiltinID == ARM::BI__builtin_arm_strexd) {
+ Function *F = CGM.getIntrinsic(Intrinsic::arm_strexd);
+ llvm::Type *STy = llvm::StructType::get(getLLVMContext(), Int32Ty, Int32Ty,
+ NULL);
+
+ Value *One = llvm::ConstantInt::get(Int32Ty, 1);
+ Value *Tmp = Builder.CreateAlloca(Int64Ty, One, "tmp");
+ Value *Val = EmitScalarExpr(E->getArg(0));
+ Builder.CreateStore(Val, Tmp);
+
+ Value *LdPtr = Builder.CreateBitCast(Tmp,llvm::PointerType::getUnqual(STy));
+ Val = Builder.CreateLoad(LdPtr);
+
+ Value *Arg0 = Builder.CreateExtractValue(Val, 0);
+ Value *Arg1 = Builder.CreateExtractValue(Val, 1);
+ Value *StPtr = EmitScalarExpr(E->getArg(1));
+ return Builder.CreateCall3(F, Arg0, Arg1, StPtr, "strexd");
+ }
+
llvm::SmallVector<Value*, 4> Ops;
for (unsigned i = 0, e = E->getNumArgs() - 1; i != e; i++)
Ops.push_back(EmitScalarExpr(E->getArg(i)));