[ARM] Implement __builtin_thread_pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43892 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index bc2c7c3..fd25502 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -23,6 +23,7 @@
#include "llvm/CallingConv.h"
#include "llvm/Constants.h"
#include "llvm/Instruction.h"
+#include "llvm/Intrinsics.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
@@ -213,7 +214,10 @@
if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb())
// Turn f64->i64 into FMRRD iff target supports vfp2.
setOperationAction(ISD::BIT_CONVERT, MVT::i64, Custom);
-
+
+ // We want to custom lower some of our intrinsics.
+ setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
+
setOperationAction(ISD::SETCC , MVT::i32, Expand);
setOperationAction(ISD::SETCC , MVT::f32, Expand);
setOperationAction(ISD::SETCC , MVT::f64, Expand);
@@ -882,6 +886,16 @@
return DAG.getNode(ARMISD::PIC_ADD, PtrVT, Result, PICLabel);
}
+static SDOperand LowerINTRINSIC_WO_CHAIN(SDOperand Op, SelectionDAG &DAG) {
+ MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
+ unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getValue();
+ switch (IntNo) {
+ default: return SDOperand(); // Don't custom lower most intrinsics.
+ case Intrinsic::arm_thread_pointer:
+ return DAG.getNode(ARMISD::THREAD_POINTER, PtrVT);
+ }
+}
+
static SDOperand LowerVASTART(SDOperand Op, SelectionDAG &DAG,
unsigned VarArgsFrameIndex) {
// vastart just stores the address of the VarArgsFrameIndex slot into the
@@ -1410,6 +1424,7 @@
case ISD::FRAMEADDR: break;
case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
case ISD::MEMCPY: return LowerMEMCPY(Op, DAG);
+ case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
}
return SDOperand();
}