Support for trampolines, except for X86 codegen which is
still under discussion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40549 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 6f63fbd..a274c14 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -190,7 +190,12 @@
setOperationAction(ISD::MEMSET , MVT::Other, Expand);
setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
-
+
+ if (Subtarget->isThumb())
+ setOperationAction(ISD::ADJUST_TRAMP, MVT::i32, Custom);
+ else
+ setOperationAction(ISD::ADJUST_TRAMP, MVT::i32, Expand);
+
// Use the default implementation.
setOperationAction(ISD::VASTART , MVT::Other, Expand);
setOperationAction(ISD::VAARG , MVT::Other, Expand);
@@ -1413,6 +1418,14 @@
return Chain;
}
+SDOperand ARMTargetLowering::LowerADJUST_TRAMP(SDOperand Op,
+ SelectionDAG &DAG) {
+ // Thumb trampolines should be entered in thumb mode, so set the bottom bit
+ // of the address.
+ return DAG.getNode(ISD::OR, MVT::i32, Op.getOperand(0),
+ DAG.getConstant(1, MVT::i32));
+}
+
SDOperand ARMTargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
switch (Op.getOpcode()) {
default: assert(0 && "Don't know how to custom lower this!"); abort();
@@ -1444,6 +1457,7 @@
case ISD::FRAMEADDR: break;
case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
case ISD::MEMCPY: return LowerMEMCPY(Op, DAG);
+ case ISD::ADJUST_TRAMP: return LowerADJUST_TRAMP(Op, DAG);
}
return SDOperand();
}