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Add address space argument to allowsUnalignedMemoryAccess.

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On R600, some address spaces have more strict alignment
requirements than others.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200887 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2014-02-05 23:15:53 +00:00
parent df7da79db6
commit bb7bf85f3c
16 changed files with 42 additions and 23 deletions
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18
include/llvm/Target/TargetLowering.h
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@ -713,14 +713,16 @@ public:
/// \brief Determine if the target supports unaligned memory accesses.
///
/// This function returns true if the target allows unaligned memory accesses.
/// of the specified type. If true, it also returns whether the unaligned
/// memory access is "fast" in the second argument by reference. This is used,
/// for example, in situations where an array copy/move/set is converted to a
/// sequence of store operations. It's use helps to ensure that such
/// replacements don't generate code that causes an alignment error (trap) on
/// the target machine.
virtual bool allowsUnalignedMemoryAccesses(EVT, bool * /*Fast*/ = 0) const {
/// This function returns true if the target allows unaligned memory accesses
/// of the specified type in the given address space. If true, it also returns
/// whether the unaligned memory access is "fast" in the third argument by
/// reference. This is used, for example, in situations where an array
/// copy/move/set is converted to a sequence of store operations. Its use
/// helps to ensure that such replacements don't generate code that causes an
/// alignment error (trap) on the target machine.
virtual bool allowsUnalignedMemoryAccesses(EVT,
unsigned AddrSpace = 0,
bool * /*Fast*/ = 0) const {
return false;
}

2
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -3693,7 +3693,7 @@ static bool FindOptimalMemOpLowering(std::vector<EVT> &MemOps,
bool Fast;
if (NumMemOps && AllowOverlap &&
VTSize >= 8 && NewVTSize < Size &&
TLI.allowsUnalignedMemoryAccesses(VT, &Fast) && Fast)
TLI.allowsUnalignedMemoryAccesses(VT, 0, &Fast) && Fast)
VTSize = Size;
else {
VT = NewVT;

7
lib/Target/ARM/ARMISelLowering.cpp
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@ -10167,7 +10167,8 @@ bool ARMTargetLowering::isDesirableToTransformToIntegerOp(unsigned Opc,
return (VT == MVT::f32) && (Opc == ISD::LOAD || Opc == ISD::STORE);
}
bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const {
bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT, unsigned,
bool *Fast) const {
// The AllowsUnaliged flag models the SCTLR.A setting in ARM cpus
bool AllowsUnaligned = Subtarget->allowsUnalignedMem();
@ -10221,11 +10222,11 @@ EVT ARMTargetLowering::getOptimalMemOpType(uint64_t Size,
bool Fast;
if (Size >= 16 &&
(memOpAlign(SrcAlign, DstAlign, 16) ||
(allowsUnalignedMemoryAccesses(MVT::v2f64, &Fast) && Fast))) {
(allowsUnalignedMemoryAccesses(MVT::v2f64, 0, &Fast) && Fast))) {
return MVT::v2f64;
} else if (Size >= 8 &&
(memOpAlign(SrcAlign, DstAlign, 8) ||
(allowsUnalignedMemoryAccesses(MVT::f64, &Fast) && Fast))) {
(allowsUnalignedMemoryAccesses(MVT::f64, 0, &Fast) && Fast))) {
return MVT::f64;
}
}

3
lib/Target/ARM/ARMISelLowering.h
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@ -273,7 +273,8 @@ namespace llvm {
/// allowsUnalignedMemoryAccesses - Returns true if the target allows
/// unaligned memory accesses of the specified type. Returns whether it
/// is "fast" by reference in the second argument.
virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const;
virtual bool allowsUnalignedMemoryAccesses(EVT VT, unsigned AddrSpace,
bool *Fast) const;
virtual EVT getOptimalMemOpType(uint64_t Size,
unsigned DstAlign, unsigned SrcAlign,

4
lib/Target/Mips/Mips16ISelLowering.cpp
View File

@ -159,7 +159,9 @@ llvm::createMips16TargetLowering(MipsTargetMachine &TM) {
}
bool
Mips16TargetLowering::allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const {
Mips16TargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
unsigned,
bool *Fast) const {
return false;
}

3
lib/Target/Mips/Mips16ISelLowering.h
View File

@ -21,7 +21,8 @@ namespace llvm {
public:
explicit Mips16TargetLowering(MipsTargetMachine &TM);
virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const;
virtual bool allowsUnalignedMemoryAccesses(EVT VT, unsigned AddrSpace,
bool *Fast) const;
virtual MachineBasicBlock *
EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *MBB) const;

4
lib/Target/Mips/MipsSEISelLowering.cpp
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@ -244,7 +244,9 @@ addMSAFloatType(MVT::SimpleValueType Ty, const TargetRegisterClass *RC) {
}
bool
MipsSETargetLowering::allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const {
MipsSETargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
unsigned,
bool *Fast) const {
MVT::SimpleValueType SVT = VT.getSimpleVT().SimpleTy;
switch (SVT) {

4
lib/Target/Mips/MipsSEISelLowering.h
View File

@ -30,7 +30,9 @@ namespace llvm {
void addMSAFloatType(MVT::SimpleValueType Ty,
const TargetRegisterClass *RC);
virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const;
virtual bool allowsUnalignedMemoryAccesses(
EVT VT, unsigned AS = 0,
bool *Fast = 0) const LLVM_OVERRIDE;
virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const;

1
lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -7885,6 +7885,7 @@ EVT PPCTargetLowering::getOptimalMemOpType(uint64_t Size,
}
bool PPCTargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
unsigned,
bool *Fast) const {
if (DisablePPCUnaligned)
return false;

4
lib/Target/PowerPC/PPCISelLowering.h
View File

@ -461,7 +461,9 @@ namespace llvm {
/// Is unaligned memory access allowed for the given type, and is it fast
/// relative to software emulation.
virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast = 0) const;
virtual bool allowsUnalignedMemoryAccesses(EVT VT,
unsigned AddrSpace,
bool *Fast = 0) const;
/// isFMAFasterThanFMulAndFAdd - Return true if an FMA operation is faster
/// than a pair of fmul and fadd instructions. fmuladd intrinsics will be

1
lib/Target/R600/SIISelLowering.cpp
View File

@ -159,6 +159,7 @@ SITargetLowering::SITargetLowering(TargetMachine &TM) :
//===----------------------------------------------------------------------===//
bool SITargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
unsigned AddrSpace,
bool *IsFast) const {
// XXX: This depends on the address space and also we may want to revist
// the alignment values we specify in the DataLayout.

2
lib/Target/R600/SIISelLowering.h
View File

@ -50,7 +50,7 @@ class SITargetLowering : public AMDGPUTargetLowering {
public:
SITargetLowering(TargetMachine &tm);
bool allowsUnalignedMemoryAccesses(EVT VT, bool *IsFast) const;
bool allowsUnalignedMemoryAccesses(EVT VT, unsigned AS, bool *IsFast) const;
virtual bool shouldSplitVectorElementType(EVT VT) const;
SDValue LowerFormalArguments(SDValue Chain, CallingConv::ID CallConv,

1
lib/Target/SystemZ/SystemZISelLowering.cpp
View File

@ -337,6 +337,7 @@ bool SystemZTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
}
bool SystemZTargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
unsigned,
bool *Fast) const {
// Unaligned accesses should never be slower than the expanded version.
// We check specifically for aligned accesses in the few cases where

4
lib/Target/SystemZ/SystemZISelLowering.h
View File

@ -209,8 +209,8 @@ public:
virtual bool isFPImmLegal(const APFloat &Imm, EVT VT) const LLVM_OVERRIDE;
virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty) const
LLVM_OVERRIDE;
virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const
LLVM_OVERRIDE;
virtual bool allowsUnalignedMemoryAccesses(EVT VT, unsigned AS,
bool *Fast) const LLVM_OVERRIDE;
virtual bool isTruncateFree(Type *, Type *) const LLVM_OVERRIDE;
virtual bool isTruncateFree(EVT, EVT) const LLVM_OVERRIDE;
virtual const char *getTargetNodeName(unsigned Opcode) const LLVM_OVERRIDE;

4
lib/Target/X86/X86ISelLowering.cpp
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@ -1671,7 +1671,9 @@ bool X86TargetLowering::isSafeMemOpType(MVT VT) const {
}
bool
X86TargetLowering::allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const {
X86TargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
unsigned,
bool *Fast) const {
if (Fast)
*Fast = Subtarget->isUnalignedMemAccessFast();
return true;

3
lib/Target/X86/X86ISelLowering.h
View File

@ -577,7 +577,8 @@ namespace llvm {
/// allowsUnalignedMemoryAccesses - Returns true if the target allows
/// unaligned memory accesses. of the specified type. Returns whether it
/// is "fast" by reference in the second argument.
virtual bool allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const;
virtual bool allowsUnalignedMemoryAccesses(EVT VT, unsigned AS,
bool *Fast) const;
/// LowerOperation - Provide custom lowering hooks for some operations.
///