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Don't forget to emit the load from indirect symbol when using movw + movt to materialize GA indirect symbols.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123809 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2011-01-19 02:16:49 +00:00
parent 6cd0b17ba7
commit fc8475bde9
4 changed files with 14 additions and 6 deletions
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9
lib/Target/ARM/ARMISelLowering.cpp
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@ -54,6 +54,7 @@
using namespace llvm;
STATISTIC(NumTailCalls, "Number of tail calls");
STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt");
// This option should go away when tail calls fully work.
static cl::opt<bool>
@ -1955,6 +1956,7 @@ SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
// If we have T2 ops, we can materialize the address directly via movt/movw
// pair. This is always cheaper.
if (Subtarget->useMovt()) {
++NumMovwMovt;
// FIXME: Once remat is capable of dealing with instructions with register
// operands, expand this into two nodes.
return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
@ -1978,6 +1980,7 @@ SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
if (Subtarget->useMovt()) {
++NumMovwMovt;
// FIXME: Once remat is capable of dealing with instructions with register
// operands, expand this into two nodes.
if (RelocM != Reloc::PIC_)
@ -1990,7 +1993,11 @@ SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
SDValue Result = DAG.getNode(ARMISD::WrapperPIC, dl, PtrVT,
DAG.getTargetGlobalAddress(GV, dl, PtrVT),
PICLabel);
return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result,
MachinePointerInfo::getGOT(), false, false, 0);
return Result;
}
unsigned ARMPCLabelIndex = 0;

4
lib/Target/ARM/ARMInstrInfo.td
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@ -3403,16 +3403,16 @@ def Int_eh_sjlj_dispatchsetup :
// This is a single pseudo instruction, the benefit is that it can be remat'd
// as a single unit instead of having to handle reg inputs.
// FIXME: Remove this when we can do generalized remat.
let isReMaterializable = 1, isMoveImm = 1 in {
let isReMaterializable = 1, isMoveImm = 1 in
def MOVi32imm : PseudoInst<(outs GPR:$dst), (ins i32imm:$src), IIC_iMOVix2,
[(set GPR:$dst, (arm_i32imm:$src))]>,
Requires<[IsARM]>;
let isReMaterializable = 1 in
def MOV_pic_ga : PseudoInst<(outs GPR:$dst),
(ins i32imm:$addr, pclabel:$id), IIC_iMOVix2,
[(set GPR:$dst, (ARMWrapperPIC tglobaladdr:$addr, imm:$id))]>,
Requires<[IsARM, UseMovt]>;
} // isReMaterializable = 1, isMoveImm = 1 in
// ConstantPool, GlobalAddress, and JumpTable
def : ARMPat<(ARMWrapper tglobaladdr :$dst), (LEApcrel tglobaladdr :$dst)>,

5
lib/Target/ARM/ARMInstrThumb2.td
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@ -3240,16 +3240,17 @@ def t2RFEIA : T2RFE<0b111010011001,
// 32-bit immediate using movw + movt.
// This is a single pseudo instruction to make it re-materializable.
// FIXME: Remove this when we can do generalized remat.
let isReMaterializable = 1, isMoveImm = 1 in {
let isReMaterializable = 1, isMoveImm = 1 in
def t2MOVi32imm : PseudoInst<(outs rGPR:$dst), (ins i32imm:$src), IIC_iMOVix2,
[(set rGPR:$dst, (i32 imm:$src))]>,
Requires<[IsThumb, HasV6T2]>;
// Materialize GA with movw + movt.
let isReMaterializable = 1 in
def t2MOV_pic_ga : PseudoInst<(outs rGPR:$dst),
(ins i32imm:$addr, pclabel:$id), IIC_iMOVix2,
[(set rGPR:$dst, (ARMWrapperPIC tglobaladdr:$addr, imm:$id))]>,
Requires<[IsThumb2, UseMovt]>;
} // isReMaterializable = 1, isMoveImm = 1 in
// ConstantPool, GlobalAddress, and JumpTable
def : T2Pat<(ARMWrapper tglobaladdr :$dst), (t2LEApcrel tglobaladdr :$dst)>,

2
lib/Target/ARM/ARMSubtarget.cpp
View File

@ -153,7 +153,7 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &FS,
if (UseMOVT && hasV6T2Ops()) {
unsigned Maj, Min, Rev;
TargetTriple.getDarwinNumber(Maj, Min, Rev);
UseMovt = (Maj > 4 || Min > 2);
UseMovt = Maj > 4;
}
}