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ARM: intrinsic support for rbit. 

We already have an ARMISD node. Create an intrinsic to map to it so we can
add support for the frontend __rbit() intrinsic.

rdar://9283021

llvm-svn: 211057
This commit is contained in:
Jim Grosbach 2014-06-16 21:55:30 +00:00
parent 5d82f09b53
commit 07393ba31b
2 changed files with 10 additions and 0 deletions
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5
llvm/include/llvm/IR/IntrinsicsARM.td
View File

@ -125,6 +125,11 @@ def int_arm_crc32cw : Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty],
def int_arm_hint : Intrinsic<[], [llvm_i32_ty]>;
//===----------------------------------------------------------------------===//
// RBIT
def int_arm_rbit : Intrinsic<[llvm_i32_ty], [llvm_i32_ty], [IntrNoMem]>;
//===----------------------------------------------------------------------===//
// UND (reserved undefined sequence)

5
llvm/lib/Target/ARM/ARMISelLowering.cpp
View File

@ -2542,6 +2542,11 @@ ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
SDLoc dl(Op);
switch (IntNo) {
default: return SDValue(); // Don't custom lower most intrinsics.
case Intrinsic::arm_rbit: {
assert(Op.getOperand(0).getValueType() == MVT::i32 &&
"RBIT intrinsic must have i32 type!");
return DAG.getNode(ARMISD::RBIT, dl, MVT::i32, Op.getOperand(0));
}
case Intrinsic::arm_thread_pointer: {
EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);