//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "mips16-hard-float"
-#include "Mips16HardFloat.h"
+#include "MipsTargetMachine.h"
#include "llvm/IR/Module.h"
+#include "llvm/IR/Value.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <string>
-static void inlineAsmOut
- (LLVMContext &C, StringRef AsmString, BasicBlock *BB ) {
- std::vector<llvm::Type *> AsmArgTypes;
- std::vector<llvm::Value*> AsmArgs;
- llvm::FunctionType *AsmFTy =
- llvm::FunctionType::get(Type::getVoidTy(C),
- AsmArgTypes, false);
- llvm::InlineAsm *IA =
- llvm::InlineAsm::get(AsmFTy, AsmString, "", true,
- /* IsAlignStack */ false,
- llvm::InlineAsm::AD_ATT);
- CallInst::Create(IA, AsmArgs, "", BB);
-}
+using namespace llvm;
+
+#define DEBUG_TYPE "mips16-hard-float"
namespace {
+ class Mips16HardFloat : public ModulePass {
+ public:
+ static char ID;
-class InlineAsmHelper {
- LLVMContext &C;
- BasicBlock *BB;
-public:
- InlineAsmHelper(LLVMContext &C_, BasicBlock *BB_) :
- C(C_), BB(BB_) {
- }
+ Mips16HardFloat(MipsTargetMachine &TM_) : ModulePass(ID), TM(TM_) {}
- void Out(StringRef AsmString) {
- inlineAsmOut(C, AsmString, BB);
- }
+ const char *getPassName() const override {
+ return "MIPS16 Hard Float Pass";
+ }
-};
+ bool runOnModule(Module &M) override;
+
+ protected:
+ const MipsTargetMachine &TM;
+ };
+
+ class InlineAsmHelper {
+ LLVMContext &C;
+ BasicBlock *BB;
+ public:
+ InlineAsmHelper(LLVMContext &C_, BasicBlock *BB_) :
+ C(C_), BB(BB_) {
+ }
+
+ void Out(StringRef AsmString) {
+ std::vector<llvm::Type *> AsmArgTypes;
+ std::vector<llvm::Value*> AsmArgs;
+
+ llvm::FunctionType *AsmFTy = llvm::FunctionType::get(Type::getVoidTy(C),
+ AsmArgTypes, false);
+ llvm::InlineAsm *IA = llvm::InlineAsm::get(AsmFTy, AsmString, "", true,
+ /* IsAlignStack */ false,
+ llvm::InlineAsm::AD_ATT);
+ CallInst::Create(IA, AsmArgs, "", BB);
+ }
+ };
+
+ char Mips16HardFloat::ID = 0;
}
+
//
// Return types that matter for hard float are:
// float, double, complex float, and complex double
if (F.arg_size() >=1) {
Type *ArgType = F.getFunctionType()->getParamType(0);
switch (ArgType->getTypeID()) {
- case Type::FloatTyID:
- case Type::DoubleTyID:
- return true;
- default:
- break;
+ case Type::FloatTyID:
+ case Type::DoubleTyID:
+ return true;
+ default:
+ break;
}
}
return false;
return whichFPReturnVariant(RetType) != NoFPRet;
}
+static bool needsFPReturnHelper(const FunctionType &FT) {
+ Type* RetType = FT.getReturnType();
+ return whichFPReturnVariant(RetType) != NoFPRet;
+}
+
static bool needsFPHelperFromSig(Function &F) {
return needsFPStubFromParams(F) || needsFPReturnHelper(F);
}
// We swap between FP and Integer registers to allow Mips16 and Mips32 to
// interoperate
//
-
-static void swapFPIntParams
- (FPParamVariant PV, Module *M, InlineAsmHelper &IAH,
- bool LE, bool ToFP) {
+static void swapFPIntParams(FPParamVariant PV, Module *M, InlineAsmHelper &IAH,
+ bool LE, bool ToFP) {
//LLVMContext &Context = M->getContext();
std::string MI = ToFP? "mtc1 ": "mfc1 ";
switch (PV) {
return;
}
}
+
//
// Make sure that we know we already need a stub for this function.
// Having called needsFPHelperFromSig
//
-static void assureFPCallStub(Function &F, Module *M,
- const MipsSubtarget &Subtarget){
+static void assureFPCallStub(Function &F, Module *M,
+ const MipsTargetMachine &TM) {
// for now we only need them for static relocation
- if (Subtarget.getRelocationModel() == Reloc::PIC_)
+ if (TM.getRelocationModel() == Reloc::PIC_)
return;
LLVMContext &Context = M->getContext();
- bool LE = Subtarget.isLittle();
+ bool LE = TM.isLittleEndian();
std::string Name = F.getName();
std::string SectionName = ".mips16.call.fp." + Name;
std::string StubName = "__call_stub_fp_" + Name;
break;
case CFRet:
if (LE) {
- IAH.Out("mfc1 $$2,$$f0");
- IAH.Out("mfc1 $$3,$$f2");
+ IAH.Out("mfc1 $$2,$$f0");
+ IAH.Out("mfc1 $$3,$$f2");
} else {
IAH.Out("mfc1 $$3,$$f0");
IAH.Out("mfc1 $$3,$$f2");
}
//
-// Functions that are inline intrinsics don't need helpers.
+// Functions that are llvm intrinsics and don't need helpers.
//
-static const char *IntrinsicInline[] =
- {"fabs", "llvm.powi.f64"};
+static const char *IntrinsicInline[] = {
+ "fabs", "fabsf",
+ "llvm.ceil.f32", "llvm.ceil.f64",
+ "llvm.copysign.f32", "llvm.copysign.f64",
+ "llvm.cos.f32", "llvm.cos.f64",
+ "llvm.exp.f32", "llvm.exp.f64",
+ "llvm.exp2.f32", "llvm.exp2.f64",
+ "llvm.fabs.f32", "llvm.fabs.f64",
+ "llvm.floor.f32", "llvm.floor.f64",
+ "llvm.fma.f32", "llvm.fma.f64",
+ "llvm.log.f32", "llvm.log.f64",
+ "llvm.log10.f32", "llvm.log10.f64",
+ "llvm.nearbyint.f32", "llvm.nearbyint.f64",
+ "llvm.pow.f32", "llvm.pow.f64",
+ "llvm.powi.f32", "llvm.powi.f64",
+ "llvm.rint.f32", "llvm.rint.f64",
+ "llvm.round.f32", "llvm.round.f64",
+ "llvm.sin.f32", "llvm.sin.f64",
+ "llvm.sqrt.f32", "llvm.sqrt.f64",
+ "llvm.trunc.f32", "llvm.trunc.f64",
+};
static bool isIntrinsicInline(Function *F) {
- return std::binary_search(
- IntrinsicInline, array_endof(IntrinsicInline),
- F->getName());
+ return std::binary_search(std::begin(IntrinsicInline),
+ std::end(IntrinsicInline), F->getName());
}
//
// Returns of float, double and complex need to be handled with a helper
// function.
//
-static bool fixupFPReturnAndCall
- (Function &F, Module *M, const MipsSubtarget &Subtarget) {
+static bool fixupFPReturnAndCall(Function &F, Module *M,
+ const MipsTargetMachine &TM) {
bool Modified = false;
LLVMContext &C = M->getContext();
Type *MyVoid = Type::getVoidTy(C);
Type *T = RVal->getType();
FPReturnVariant RV = whichFPReturnVariant(T);
if (RV == NoFPRet) continue;
- static const char* Helper[NoFPRet] =
- {"__mips16_ret_sf", "__mips16_ret_df", "__mips16_ret_sc",
- "__mips16_ret_dc"};
+ static const char* Helper[NoFPRet] = {
+ "__mips16_ret_sf", "__mips16_ret_df", "__mips16_ret_sc",
+ "__mips16_ret_dc"
+ };
const char *Name = Helper[RV];
AttributeSet A;
Value *Params[] = {RVal};
Attribute::ReadNone);
A = A.addAttribute(C, AttributeSet::FunctionIndex,
Attribute::NoInline);
- Value *F = (M->getOrInsertFunction(Name, A, MyVoid, T, NULL));
+ Value *F = (M->getOrInsertFunction(Name, A, MyVoid, T, nullptr));
CallInst::Create(F, Params, "", &Inst );
} else if (const CallInst *CI = dyn_cast<CallInst>(I)) {
+ const Value* V = CI->getCalledValue();
+ const Type* T = nullptr;
+ if (V) T = V->getType();
+ const PointerType *PFT=nullptr;
+ if (T) PFT = dyn_cast<PointerType>(T);
+ const FunctionType *FT=nullptr;
+ if (PFT) FT = dyn_cast<FunctionType>(PFT->getElementType());
+ Function *F_ = CI->getCalledFunction();
+ if (FT && needsFPReturnHelper(*FT) &&
+ !(F_ && isIntrinsicInline(F_))) {
+ Modified=true;
+ F.addFnAttr("saveS2");
+ }
+ if (F_ && !isIntrinsicInline(F_)) {
// pic mode calls are handled by already defined
// helper functions
- if (Subtarget.getRelocationModel() != Reloc::PIC_ ) {
- Function *F_ = CI->getCalledFunction();
- if (F_ && !isIntrinsicInline(F_) && needsFPHelperFromSig(*F_)) {
- assureFPCallStub(*F_, M, Subtarget);
+ if (needsFPReturnHelper(*F_)) {
+ Modified=true;
+ F.addFnAttr("saveS2");
+ }
+ if (TM.getRelocationModel() != Reloc::PIC_ ) {
+ if (needsFPHelperFromSig(*F_)) {
+ assureFPCallStub(*F_, M, TM);
Modified=true;
}
}
+ }
}
}
return Modified;
}
static void createFPFnStub(Function *F, Module *M, FPParamVariant PV,
- const MipsSubtarget &Subtarget ) {
- bool PicMode = Subtarget.getRelocationModel() == Reloc::PIC_;
- bool LE = Subtarget.isLittle();
+ const MipsTargetMachine &TM) {
+ bool PicMode = TM.getRelocationModel() == Reloc::PIC_;
+ bool LE = TM.isLittleEndian();
LLVMContext &Context = M->getContext();
std::string Name = F->getName();
std::string SectionName = ".mips16.fn." + Name;
std::string StubName = "__fn_stub_" + Name;
- std::string LocalName = "__fn_local_" + Name;
+ std::string LocalName = "$$__fn_local_" + Name;
Function *FStub = Function::Create
(F->getFunctionType(),
Function::InternalLinkage, StubName, M);
FStub->setSection(SectionName);
BasicBlock *BB = BasicBlock::Create(Context, "entry", FStub);
InlineAsmHelper IAH(Context, BB);
- IAH.Out(" .set macro");
if (PicMode) {
IAH.Out(".set noreorder");
- IAH.Out(".cpload $$2");
+ IAH.Out(".cpload $$25");
IAH.Out(".set reorder");
IAH.Out(".reloc 0,R_MIPS_NONE," + Name);
IAH.Out("la $$25," + LocalName);
}
- else
- IAH.Out("la $$25, " + Name);
+ else {
+ IAH.Out("la $$25," + Name);
+ }
swapFPIntParams(PV, M, IAH, LE, false);
IAH.Out("jr $$25");
IAH.Out(LocalName + " = " + Name);
F.addAttributes(AttributeSet::FunctionIndex, A);
}
-namespace llvm {
//
// This pass only makes sense when the underlying chip has floating point but
// declared via attributes as nomips16, we must:
// 1) fixup all returns of float, double, single and double complex
// by calling a helper function before the actual return.
-// 2) generate helper functions (stubs) that can be called by mips32 functions
-// that will move parameters passed normally passed in floating point
+// 2) generate helper functions (stubs) that can be called by mips32
+// functions that will move parameters passed normally passed in
+// floating point
// registers the soft float equivalents.
// 3) in the case of static relocation, generate helper functions so that
// mips16 functions can call extern functions of unknown type (mips16 or
}
if (F->isDeclaration() || F->hasFnAttribute("mips16_fp_stub") ||
F->hasFnAttribute("nomips16")) continue;
- Modified |= fixupFPReturnAndCall(*F, &M, Subtarget);
+ Modified |= fixupFPReturnAndCall(*F, &M, TM);
FPParamVariant V = whichFPParamVariantNeeded(*F);
if (V != NoSig) {
Modified = true;
- createFPFnStub(F, &M, V, Subtarget);
+ createFPFnStub(F, &M, V, TM);
}
}
return Modified;
}
-char Mips16HardFloat::ID = 0;
-
-}
-ModulePass *llvm::createMips16HardFloat(MipsTargetMachine &TM) {
+ModulePass *llvm::createMips16HardFloatPass(MipsTargetMachine &TM) {
return new Mips16HardFloat(TM);
}
-
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