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[SPARC] Add support for llvm.thread.pointer.

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Differential Revision: http://reviews.llvm.org/D19387

llvm-svn: 267544
This commit is contained in:
Marcin Koscielnicki 2016-04-26 10:37:01 +00:00
parent 1ebf01e084
commit 470e89bab4
3 changed files with 29 additions and 0 deletions
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16
lib/Target/Sparc/SparcISelLowering.cpp
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@ -1799,6 +1799,8 @@ SparcTargetLowering::SparcTargetLowering(TargetMachine &TM,
}
}
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
setMinFunctionAlignment(2);
computeRegisterProperties(Subtarget->getRegisterInfo());
@ -2960,6 +2962,19 @@ static SDValue LowerATOMIC_LOAD_STORE(SDValue Op, SelectionDAG &DAG) {
return Op;
}
SDValue SparcTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
SelectionDAG &DAG) const {
unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
SDLoc dl(Op);
switch (IntNo) {
default: return SDValue(); // Don't custom lower most intrinsics.
case Intrinsic::thread_pointer: {
EVT PtrVT = getPointerTy(DAG.getDataLayout());
return DAG.getRegister(SP::G7, PtrVT);
}
}
}
SDValue SparcTargetLowering::
LowerOperation(SDValue Op, SelectionDAG &DAG) const {
@ -3018,6 +3033,7 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const {
case ISD::SMULO: return LowerUMULO_SMULO(Op, DAG, *this);
case ISD::ATOMIC_LOAD:
case ISD::ATOMIC_STORE: return LowerATOMIC_LOAD_STORE(Op, DAG);
case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
}
}

2
lib/Target/Sparc/SparcISelLowering.h
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@ -174,6 +174,8 @@ namespace llvm {
SDLoc DL,
SelectionDAG &DAG) const;
SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const;
bool ShouldShrinkFPConstant(EVT VT) const override {
// Do not shrink FP constpool if VT == MVT::f128.
// (ldd, call _Q_fdtoq) is more expensive than two ldds.

11
test/CodeGen/SPARC/thread-pointer.ll Normal file
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@ -0,0 +1,11 @@
; RUN: llc < %s -mtriple=sparc-unknown-linux-gnu | FileCheck %s
; RUN: llc < %s -mtriple=sparc64-unknown-linux-gnu | FileCheck %s
; Function Attrs: nounwind readnone
declare i8* @llvm.thread.pointer() #1
define i8* @thread_pointer() {
; CHECK: mov %g7, %o0
%1 = tail call i8* @llvm.thread.pointer()
ret i8* %1
}