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-rw-r--r--contrib/llvm/lib/Target/Mips/Mips16ISelLowering.cpp101
1 files changed, 59 insertions, 42 deletions
diff --git a/contrib/llvm/lib/Target/Mips/Mips16ISelLowering.cpp b/contrib/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
index 61d8bb8e5582..587925df946b 100644
--- a/contrib/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
+++ b/contrib/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
@@ -10,17 +10,20 @@
// Subclass of MipsTargetLowering specialized for mips16.
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "mips-lower"
#include "Mips16ISelLowering.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
#include "MipsRegisterInfo.h"
#include "MipsTargetMachine.h"
-#include "MCTargetDesc/MipsBaseInfo.h"
+#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetInstrInfo.h"
+#include <string>
using namespace llvm;
+#define DEBUG_TYPE "mips-lower"
+
static cl::opt<bool> DontExpandCondPseudos16(
"mips16-dont-expand-cond-pseudo",
cl::init(false),
@@ -115,20 +118,14 @@ static const Mips16IntrinsicHelperType Mips16IntrinsicHelper[] = {
{"truncf", "__mips16_call_stub_sf_1"},
};
-Mips16TargetLowering::Mips16TargetLowering(MipsTargetMachine &TM)
- : MipsTargetLowering(TM) {
- //
- // set up as if mips32 and then revert so we can test the mechanism
- // for switching
- addRegisterClass(MVT::i32, &Mips::GPR32RegClass);
- addRegisterClass(MVT::f32, &Mips::FGR32RegClass);
- computeRegisterProperties();
- clearRegisterClasses();
+Mips16TargetLowering::Mips16TargetLowering(MipsTargetMachine &TM,
+ const MipsSubtarget &STI)
+ : MipsTargetLowering(TM, STI) {
// Set up the register classes
addRegisterClass(MVT::i32, &Mips::CPU16RegsRegClass);
- if (Subtarget->inMips16HardFloat())
+ if (!TM.Options.UseSoftFloat)
setMips16HardFloatLibCalls();
setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Expand);
@@ -154,12 +151,15 @@ Mips16TargetLowering::Mips16TargetLowering(MipsTargetMachine &TM)
}
const MipsTargetLowering *
-llvm::createMips16TargetLowering(MipsTargetMachine &TM) {
- return new Mips16TargetLowering(TM);
+llvm::createMips16TargetLowering(MipsTargetMachine &TM,
+ const MipsSubtarget &STI) {
+ return new Mips16TargetLowering(TM, STI);
}
bool
-Mips16TargetLowering::allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const {
+Mips16TargetLowering::allowsUnalignedMemoryAccesses(EVT VT,
+ unsigned,
+ bool *Fast) const {
return false;
}
@@ -349,7 +349,7 @@ unsigned int Mips16TargetLowering::getMips16HelperFunctionStubNumber
#define T P "0" , T1
#define P P_
static char const * vMips16Helper[MAX_STUB_NUMBER+1] =
- {0, T1 };
+ {nullptr, T1 };
#undef P
#define P P_ "sf_"
static char const * sfMips16Helper[MAX_STUB_NUMBER+1] =
@@ -426,11 +426,10 @@ getOpndList(SmallVectorImpl<SDValue> &Ops,
SelectionDAG &DAG = CLI.DAG;
MachineFunction &MF = DAG.getMachineFunction();
MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
- const char* Mips16HelperFunction = 0;
+ const char* Mips16HelperFunction = nullptr;
bool NeedMips16Helper = false;
- if (getTargetMachine().Options.UseSoftFloat &&
- Subtarget->inMips16HardFloat()) {
+ if (Subtarget.inMips16HardFloat()) {
//
// currently we don't have symbols tagged with the mips16 or mips32
// qualifier so we will assume that we don't know what kind it is.
@@ -440,19 +439,40 @@ getOpndList(SmallVectorImpl<SDValue> &Ops,
if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(CLI.Callee)) {
Mips16Libcall Find = { RTLIB::UNKNOWN_LIBCALL, S->getSymbol() };
- if (std::binary_search(HardFloatLibCalls, array_endof(HardFloatLibCalls),
- Find))
+ if (std::binary_search(std::begin(HardFloatLibCalls),
+ std::end(HardFloatLibCalls), Find))
LookupHelper = false;
else {
- Mips16IntrinsicHelperType IntrinsicFind = {S->getSymbol(), ""};
+ const char *Symbol = S->getSymbol();
+ Mips16IntrinsicHelperType IntrinsicFind = { Symbol, "" };
+ const Mips16HardFloatInfo::FuncSignature *Signature =
+ Mips16HardFloatInfo::findFuncSignature(Symbol);
+ if (!IsPICCall && (Signature && (FuncInfo->StubsNeeded.find(Symbol) ==
+ FuncInfo->StubsNeeded.end()))) {
+ FuncInfo->StubsNeeded[Symbol] = Signature;
+ //
+ // S2 is normally saved if the stub is for a function which
+ // returns a float or double value and is not otherwise. This is
+ // because more work is required after the function the stub
+ // is calling completes, and so the stub cannot directly return
+ // and the stub has no stack space to store the return address so
+ // S2 is used for that purpose.
+ // In order to take advantage of not saving S2, we need to also
+ // optimize the call in the stub and this requires some further
+ // functionality in MipsAsmPrinter which we don't have yet.
+ // So for now we always save S2. The optimization will be done
+ // in a follow-on patch.
+ //
+ if (1 || (Signature->RetSig != Mips16HardFloatInfo::NoFPRet))
+ FuncInfo->setSaveS2();
+ }
// one more look at list of intrinsics
- if (std::binary_search(Mips16IntrinsicHelper,
- array_endof(Mips16IntrinsicHelper),
- IntrinsicFind)) {
- const Mips16IntrinsicHelperType *h =(std::find(Mips16IntrinsicHelper,
- array_endof(Mips16IntrinsicHelper),
- IntrinsicFind));
- Mips16HelperFunction = h->Helper;
+ const Mips16IntrinsicHelperType *Helper =
+ std::lower_bound(std::begin(Mips16IntrinsicHelper),
+ std::end(Mips16IntrinsicHelper), IntrinsicFind);
+ if (Helper != std::end(Mips16IntrinsicHelper) &&
+ *Helper == IntrinsicFind) {
+ Mips16HelperFunction = Helper->Helper;
NeedMips16Helper = true;
LookupHelper = false;
}
@@ -463,13 +483,13 @@ getOpndList(SmallVectorImpl<SDValue> &Ops,
Mips16Libcall Find = { RTLIB::UNKNOWN_LIBCALL,
G->getGlobal()->getName().data() };
- if (std::binary_search(HardFloatLibCalls, array_endof(HardFloatLibCalls),
- Find))
+ if (std::binary_search(std::begin(HardFloatLibCalls),
+ std::end(HardFloatLibCalls), Find))
LookupHelper = false;
}
- if (LookupHelper) Mips16HelperFunction =
- getMips16HelperFunction(CLI.RetTy, CLI.Args, NeedMips16Helper);
-
+ if (LookupHelper)
+ Mips16HelperFunction =
+ getMips16HelperFunction(CLI.RetTy, CLI.getArgs(), NeedMips16Helper);
}
SDValue JumpTarget = Callee;
@@ -524,8 +544,7 @@ emitSel16(unsigned Opc, MachineInstr *MI, MachineBasicBlock *BB) const {
// Transfer the remainder of BB and its successor edges to sinkMBB.
sinkMBB->splice(sinkMBB->begin(), BB,
- llvm::next(MachineBasicBlock::iterator(MI)),
- BB->end());
+ std::next(MachineBasicBlock::iterator(MI)), BB->end());
sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
// Next, add the true and fallthrough blocks as its successors.
@@ -587,8 +606,7 @@ MachineBasicBlock *Mips16TargetLowering::emitSelT16
// Transfer the remainder of BB and its successor edges to sinkMBB.
sinkMBB->splice(sinkMBB->begin(), BB,
- llvm::next(MachineBasicBlock::iterator(MI)),
- BB->end());
+ std::next(MachineBasicBlock::iterator(MI)), BB->end());
sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
// Next, add the true and fallthrough blocks as its successors.
@@ -652,8 +670,7 @@ MachineBasicBlock *Mips16TargetLowering::emitSeliT16
// Transfer the remainder of BB and its successor edges to sinkMBB.
sinkMBB->splice(sinkMBB->begin(), BB,
- llvm::next(MachineBasicBlock::iterator(MI)),
- BB->end());
+ std::next(MachineBasicBlock::iterator(MI)), BB->end());
sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
// Next, add the true and fallthrough blocks as its successors.
@@ -747,8 +764,8 @@ MachineBasicBlock *Mips16TargetLowering::emitFEXT_CCRX16_ins(
unsigned CC = MI->getOperand(0).getReg();
unsigned regX = MI->getOperand(1).getReg();
unsigned regY = MI->getOperand(2).getReg();
- BuildMI(*BB, MI, MI->getDebugLoc(),
- TII->get(SltOpc)).addReg(regX).addReg(regY);
+ BuildMI(*BB, MI, MI->getDebugLoc(), TII->get(SltOpc)).addReg(regX).addReg(
+ regY);
BuildMI(*BB, MI, MI->getDebugLoc(),
TII->get(Mips::MoveR3216), CC).addReg(Mips::T8);
MI->eraseFromParent(); // The pseudo instruction is gone now.
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-07 07:58:58 +0000