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Lower BlockAddress node when relocation-model is static.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130131 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2011-04-25 17:10:45 +00:00
parent 06104e3743
commit f48eb533d5
3 changed files with 33 additions and 21 deletions
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38
lib/Target/Mips/MipsISelLowering.cpp
View File

@ -801,24 +801,30 @@ SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
SDValue MipsTargetLowering::LowerBlockAddress(SDValue Op,
SelectionDAG &DAG) const {
const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
assert(false && "implement LowerBlockAddress for -static");
return SDValue(0, 0);
}
else {
// FIXME there isn't actually debug info here
DebugLoc dl = Op.getDebugLoc();
const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
SDValue BAGOTOffset = DAG.getBlockAddress(BA, MVT::i32, true,
MipsII::MO_GOT);
SDValue BALOOffset = DAG.getBlockAddress(BA, MVT::i32, true,
MipsII::MO_ABS_LO);
SDValue Load = DAG.getLoad(MVT::i32, dl,
DAG.getEntryNode(), BAGOTOffset,
MachinePointerInfo(), false, false, 0);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, BALOOffset);
return DAG.getNode(ISD::ADD, dl, MVT::i32, Load, Lo);
// %hi/%lo relocation
SDValue BAHi = DAG.getBlockAddress(BA, MVT::i32, true,
MipsII::MO_ABS_HI);
SDValue BALo = DAG.getBlockAddress(BA, MVT::i32, true,
MipsII::MO_ABS_LO);
SDValue Hi = DAG.getNode(MipsISD::Hi, dl, MVT::i32, BAHi);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, BALo);
return DAG.getNode(ISD::ADD, dl, MVT::i32, Hi, Lo);
}
SDValue BAGOTOffset = DAG.getBlockAddress(BA, MVT::i32, true,
MipsII::MO_GOT);
SDValue BALOOffset = DAG.getBlockAddress(BA, MVT::i32, true,
MipsII::MO_ABS_LO);
SDValue Load = DAG.getLoad(MVT::i32, dl,
DAG.getEntryNode(), BAGOTOffset,
MachinePointerInfo(), false, false, 0);
SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, BALOOffset);
return DAG.getNode(ISD::ADD, dl, MVT::i32, Load, Lo);
}
SDValue MipsTargetLowering::

1
lib/Target/Mips/MipsInstrInfo.td
View File

@ -557,6 +557,7 @@ def : Pat<(MipsJmpLink (i32 texternalsym:$dst)),
// hi/lo relocs
def : Pat<(MipsHi tglobaladdr:$in), (LUi tglobaladdr:$in)>;
def : Pat<(MipsHi tblockaddress:$in), (LUi tblockaddress:$in)>;
def : Pat<(add CPURegs:$hi, (MipsLo tglobaladdr:$lo)),
(ADDiu CPURegs:$hi, tglobaladdr:$lo)>;
def : Pat<(add CPURegs:$hi, (MipsLo tblockaddress:$lo)),

15
test/CodeGen/Mips/blockaddr.ll
View File

@ -1,4 +1,5 @@
; RUN: llc -march=mipsel < %s | FileCheck %s
; RUN: llc -march=mipsel -relocation-model=pic < %s | FileCheck %s -check-prefix=CHECK-PIC
; RUN: llc -march=mipsel -relocation-model=static < %s | FileCheck %s -check-prefix=CHECK-STATIC
@reg = common global i8* null, align 4
@ -7,10 +8,14 @@ entry:
ret i8* %x
}
; CHECK: lw $2, %got($tmp1)($gp)
; CHECK: addiu $4, $2, %lo($tmp1)
; CHECK: lw $2, %got($tmp2)($gp)
; CHECK: addiu $2, $2, %lo($tmp2)
; CHECK-PIC: lw $[[R0:[0-9]+]], %got($tmp1)($gp)
; CHECK-PIC: addiu ${{[0-9]+}}, $[[R0]], %lo($tmp1)
; CHECK-PIC: lw $[[R1:[0-9]+]], %got($tmp2)($gp)
; CHECK-PIC: addiu ${{[0-9]+}}, $[[R1]], %lo($tmp2)
; CHECK-STATIC: lui $[[R2:[0-9]+]], %hi($tmp1)
; CHECK-STATIC: addiu ${{[0-9]+}}, $[[R2]], %lo($tmp1)
; CHECK-STATIC: lui $[[R3:[0-9]+]], %hi($tmp2)
; CHECK-STATIC: addiu ${{[0-9]+}}, $[[R3]], %lo($tmp2)
define void @f() nounwind {
entry:
%call = tail call i8* @dummy(i8* blockaddress(@f, %baz))