maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[SparcV9]: Implement RETURNADDR and FRAMEADDR lowering in SPARC64. 

Fixes PR18356.

llvm-svn: 198480
This commit is contained in:
Venkatraman Govindaraju 2014-01-04 07:17:21 +00:00
parent d03fc4d4e1
commit 96ab3bc5bd
2 changed files with 78 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
llvm/lib/Target/Sparc/SparcISelLowering.cpp
View File

@ -2415,39 +2415,57 @@ static SDValue getFLUSHW(SDValue Op, SelectionDAG &DAG) {
return Chain;
}
static SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
static SDValue getFRAMEADDR(uint64_t depth, SDValue Op, SelectionDAG &DAG,
const SparcSubtarget *Subtarget) {
MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
MFI->setFrameAddressIsTaken(true);
EVT VT = Op.getValueType();
SDLoc dl(Op);
unsigned FrameReg = SP::I6;
uint64_t depth = Op.getConstantOperandVal(0);
unsigned stackBias = Subtarget->getStackPointerBias();
SDValue FrameAddr;
if (depth == 0)
FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
else {
// flush first to make sure the windowed registers' values are in stack
SDValue Chain = getFLUSHW(Op, DAG);
FrameAddr = DAG.getCopyFromReg(Chain, dl, FrameReg, VT);
for (uint64_t i = 0; i != depth; ++i) {
SDValue Ptr = DAG.getNode(ISD::ADD,
dl, MVT::i32,
FrameAddr, DAG.getIntPtrConstant(56));
FrameAddr = DAG.getLoad(MVT::i32, dl,
Chain,
Ptr,
MachinePointerInfo(), false, false, false, 0);
}
if (depth == 0) {
FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
if (Subtarget->is64Bit())
FrameAddr = DAG.getNode(ISD::ADD, dl, VT, FrameAddr,
DAG.getIntPtrConstant(stackBias));
return FrameAddr;
}
// flush first to make sure the windowed registers' values are in stack
SDValue Chain = getFLUSHW(Op, DAG);
FrameAddr = DAG.getCopyFromReg(Chain, dl, FrameReg, VT);
unsigned Offset = (Subtarget->is64Bit()) ? (stackBias + 112) : 56;
while (depth--) {
SDValue Ptr = DAG.getNode(ISD::ADD, dl, VT, FrameAddr,
DAG.getIntPtrConstant(Offset));
FrameAddr = DAG.getLoad(VT, dl, Chain, Ptr, MachinePointerInfo(),
false, false, false, 0);
}
if (Subtarget->is64Bit())
FrameAddr = DAG.getNode(ISD::ADD, dl, VT, FrameAddr,
DAG.getIntPtrConstant(stackBias));
return FrameAddr;
}
static SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG,
const SparcSubtarget *Subtarget) {
uint64_t depth = Op.getConstantOperandVal(0);
return getFRAMEADDR(depth, Op, DAG, Subtarget);
}
static SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG,
const SparcTargetLowering &TLI) {
const SparcTargetLowering &TLI,
const SparcSubtarget *Subtarget) {
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
MFI->setReturnAddressIsTaken(true);
@ -2461,25 +2479,20 @@ static SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG,
unsigned RetReg = MF.addLiveIn(SP::I7,
TLI.getRegClassFor(TLI.getPointerTy()));
RetAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, RetReg, VT);
} else {
// Need frame address to find return address of the caller.
MFI->setFrameAddressIsTaken(true);
// flush first to make sure the windowed registers' values are in stack
SDValue Chain = getFLUSHW(Op, DAG);
RetAddr = DAG.getCopyFromReg(Chain, dl, SP::I6, VT);
for (uint64_t i = 0; i != depth; ++i) {
SDValue Ptr = DAG.getNode(ISD::ADD,
dl, MVT::i32,
RetAddr,
DAG.getIntPtrConstant((i == depth-1)?60:56));
RetAddr = DAG.getLoad(MVT::i32, dl,
Chain,
Ptr,
MachinePointerInfo(), false, false, false, 0);
}
return RetAddr;
}
// Need frame address to find return address of the caller.
SDValue FrameAddr = getFRAMEADDR(depth - 1, Op, DAG, Subtarget);
unsigned Offset = (Subtarget->is64Bit()) ? 120 : 60;
SDValue Ptr = DAG.getNode(ISD::ADD,
dl, VT,
FrameAddr,
DAG.getIntPtrConstant(Offset));
RetAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), Ptr,
MachinePointerInfo(), false, false, false, 0);
return RetAddr;
}
@ -2763,8 +2776,10 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const {
switch (Op.getOpcode()) {
default: llvm_unreachable("Should not custom lower this!");
case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG, *this);
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG, *this,
Subtarget);
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG,
Subtarget);
case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);

35
llvm/test/CodeGen/SPARC/2011-01-11-FrameAddr.ll
View File

@ -2,6 +2,7 @@
;RUN: llc -march=sparc -mattr=v9 < %s | FileCheck %s -check-prefix=V9
;RUN: llc -march=sparc -regalloc=basic < %s | FileCheck %s -check-prefix=V8
;RUN: llc -march=sparc -regalloc=basic -mattr=v9 < %s | FileCheck %s -check-prefix=V9
;RUN: llc -march=sparcv9 < %s | FileCheck %s -check-prefix=SPARC64
define i8* @frameaddr() nounwind readnone {
@ -15,6 +16,13 @@ entry:
;V9: save %sp, -96, %sp
;V9: jmp %i7+8
;V9: restore %g0, %fp, %o0
;SPARC64-LABEL: frameaddr
;SPARC64: save %sp, -128, %sp
;SPARC64: add %fp, 2047, %i0
;SPARC64: jmp %i7+8
;SPARC64: restore %g0, %g0, %g0
%0 = tail call i8* @llvm.frameaddress(i32 0)
ret i8* %0
}
@ -32,6 +40,14 @@ entry:
;V9: ld [%fp+56], {{.+}}
;V9: ld [{{.+}}+56], {{.+}}
;V9: ld [{{.+}}+56], {{.+}}
;SPARC64-LABEL: frameaddr2
;SPARC64: flushw
;SPARC64: ldx [%fp+2159], %[[R0:[goli][0-7]]]
;SPARC64: ldx [%[[R0]]+2159], %[[R1:[goli][0-7]]]
;SPARC64: ldx [%[[R1]]+2159], %[[R2:[goli][0-7]]]
;SPARC64: add %[[R2]], 2047, {{.+}}
%0 = tail call i8* @llvm.frameaddress(i32 3)
ret i8* %0
}
@ -48,6 +64,9 @@ entry:
;V9-LABEL: retaddr:
;V9: or %g0, %o7, {{.+}}
;SPARC64-LABEL: retaddr
;SPARC64: or %g0, %o7, {{.+}}
%0 = tail call i8* @llvm.returnaddress(i32 0)
ret i8* %0
}
@ -66,17 +85,11 @@ entry:
;V9: ld [{{.+}}+56], {{.+}}
;V9: ld [{{.+}}+60], {{.+}}
;V8LEAF-LABEL: retaddr2:
;V8LEAF: ta 3
;V8LEAF: ld [%fp+56], %[[R:[goli][0-7]]]
;V8LEAF: ld [%[[R]]+56], %[[R1:[goli][0-7]]]
;V8LEAF: ld [%[[R1]]+60], {{.+}}
;V9LEAF-LABEL: retaddr2:
;V9LEAF: flushw
;V9LEAF: ld [%fp+56], %[[R:[goli][0-7]]]
;V9LEAF: ld [%[[R]]+56], %[[R1:[goli][0-7]]]
;V9LEAF: ld [%[[R1]]+60], {{.+}}
;SPARC64-LABEL: retaddr2
;SPARC64: flushw
;SPARC64: ldx [%fp+2159], %[[R0:[goli][0-7]]]
;SPARC64: ldx [%[[R0]]+2159], %[[R1:[goli][0-7]]]
;SPARC64: ldx [%[[R1]]+2167], {{.+}}
%0 = tail call i8* @llvm.returnaddress(i32 3)
ret i8* %0