[cfe-commits] r132249 - in /cfe/trunk: include/clang/Basic/BuiltinsARM.def lib/CodeGen/CGBuiltin.cpp

[Bruno Cardoso Lopes]

Author: bruno
Date: Fri May 27 23:11:33 2011
New Revision: 132249

URL: http://llvm.org/viewvc/llvm-project?rev=132249&view=rev
Log:
Add support for ARM ldrexd/strexd builtins

Modified:
    cfe/trunk/include/clang/Basic/BuiltinsARM.def
    cfe/trunk/lib/CodeGen/CGBuiltin.cpp

Modified: cfe/trunk/include/clang/Basic/BuiltinsARM.def
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/BuiltinsARM.def?rev=132249&r1=132248&r2=132249&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/BuiltinsARM.def (original)
+++ cfe/trunk/include/clang/Basic/BuiltinsARM.def Fri May 27 23:11:33 2011
@@ -24,6 +24,10 @@
 BUILTIN(__builtin_arm_ssat, "iiUi", "nc")
 BUILTIN(__builtin_arm_usat, "UiUiUi", "nc")
 
+// Store and load exclusive doubleword
+BUILTIN(__builtin_arm_ldrexd, "LLUiv*", "")
+BUILTIN(__builtin_arm_strexd, "iLLUiv*", "")
+
 // VFP
 BUILTIN(__builtin_arm_get_fpscr, "Ui", "nc")
 BUILTIN(__builtin_arm_set_fpscr, "vUi", "nc")

Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=132249&r1=132248&r2=132249&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Fri May 27 23:11:33 2011
@@ -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)));