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[CodeGen] Pull MMI helpers from FunctionLoweringInfo to MMI. NFC.

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They're not SelectionDAG- or FunctionLoweringInfo-specific.  They
are, however, specific to building MMI from IR.
We could make them members, but it's nice having MMI be a "simple" data
structure and this logic kept separate.

This also lets us reuse them from GlobalISel.

llvm-svn: 287167
This commit is contained in:
Ahmed Bougacha 2016-11-16 22:24:56 +00:00
parent 11c0c884d4
commit 8f2c183cb3
5 changed files with 67 additions and 70 deletions
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13
include/llvm/CodeGen/FunctionLoweringInfo.h
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@ -33,7 +33,6 @@ namespace llvm {
class AllocaInst;
class BasicBlock;
class BranchProbabilityInfo;
class CallInst;
class Function;
class GlobalVariable;
class Instruction;
@ -297,18 +296,6 @@ private:
IndexedMap<LiveOutInfo, VirtReg2IndexFunctor> LiveOutRegInfo;
};
/// ComputeUsesVAFloatArgument - Determine if any floating-point values are
/// being passed to this variadic function, and set the MachineModuleInfo's
/// usesVAFloatArgument flag if so. This flag is used to emit an undefined
/// reference to _fltused on Windows, which will link in MSVCRT's
/// floating-point support.
void ComputeUsesVAFloatArgument(const CallInst &I, MachineModuleInfo *MMI);
/// AddLandingPadInfo - Extract the exception handling information from the
/// landingpad instruction and add them to the specified machine module info.
void AddLandingPadInfo(const LandingPadInst &I, MachineModuleInfo &MMI,
MachineBasicBlock *MBB);
} // end namespace llvm
#endif

16
include/llvm/CodeGen/MachineModuleInfo.h
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@ -49,8 +49,10 @@ namespace llvm {
//===----------------------------------------------------------------------===//
// Forward declarations.
class BlockAddress;
class CallInst;
class Constant;
class GlobalVariable;
class LandingPadInst;
class MDNode;
class MMIAddrLabelMap;
class MachineBasicBlock;
@ -421,6 +423,20 @@ public:
}; // End class MachineModuleInfo
//===- MMI building helpers -----------------------------------------------===//
/// Determine if any floating-point values are being passed to this variadic
/// function, and set the MachineModuleInfo's usesVAFloatArgument flag if so.
/// This flag is used to emit an undefined reference to _fltused on Windows,
/// which will link in MSVCRT's floating-point support.
void ComputeUsesVAFloatArgument(const CallInst &I, MachineModuleInfo *MMI);
/// Extract the exception handling information from the landingpad instruction
/// and add them to the specified machine module info.
void AddLandingPadInfo(const LandingPadInst &I, MachineModuleInfo &MMI,
MachineBasicBlock *MBB);
} // End llvm namespace
#endif

1
lib/CodeGen/GlobalISel/IRTranslator.cpp
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@ -15,7 +15,6 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/GlobalISel/CallLowering.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"

51
lib/CodeGen/MachineModuleInfo.cpp
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@ -9,6 +9,7 @@
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/ADT/TinyPtrVector.h"
#include "llvm/Analysis/EHPersonalities.h"
#include "llvm/Analysis/ValueTracking.h"
@ -19,6 +20,7 @@
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCSymbol.h"
@ -485,3 +487,52 @@ FunctionPass *createFreeMachineFunctionPass() {
return new FreeMachineFunction();
}
} // end namespace llvm
//===- MMI building helpers -----------------------------------------------===//
void llvm::ComputeUsesVAFloatArgument(const CallInst &I,
MachineModuleInfo *MMI) {
FunctionType *FT =
cast<FunctionType>(I.getCalledValue()->getType()->getContainedType(0));
if (FT->isVarArg() && !MMI->usesVAFloatArgument()) {
for (unsigned i = 0, e = I.getNumArgOperands(); i != e; ++i) {
Type *T = I.getArgOperand(i)->getType();
for (auto i : post_order(T)) {
if (i->isFloatingPointTy()) {
MMI->setUsesVAFloatArgument(true);
return;
}
}
}
}
}
void llvm::AddLandingPadInfo(const LandingPadInst &I, MachineModuleInfo &MMI,
MachineBasicBlock *MBB) {
if (const auto *PF = dyn_cast<Function>(
I.getParent()->getParent()->getPersonalityFn()->stripPointerCasts()))
MMI.addPersonality(PF);
if (I.isCleanup())
MMI.addCleanup(MBB);
// FIXME: New EH - Add the clauses in reverse order. This isn't 100% correct,
// but we need to do it this way because of how the DWARF EH emitter
// processes the clauses.
for (unsigned i = I.getNumClauses(); i != 0; --i) {
Value *Val = I.getClause(i - 1);
if (I.isCatch(i - 1)) {
MMI.addCatchTypeInfo(MBB,
dyn_cast<GlobalValue>(Val->stripPointerCasts()));
} else {
// Add filters in a list.
Constant *CVal = cast<Constant>(Val);
SmallVector<const GlobalValue *, 4> FilterList;
for (User::op_iterator II = CVal->op_begin(), IE = CVal->op_end();
II != IE; ++II)
FilterList.push_back(cast<GlobalValue>((*II)->stripPointerCasts()));
MMI.addFilterTypeInfo(MBB, FilterList);
}
}
}

56
lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
View File

@ -13,7 +13,6 @@
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
@ -544,61 +543,6 @@ unsigned FunctionLoweringInfo::getCatchPadExceptionPointerVReg(
return VReg;
}
/// ComputeUsesVAFloatArgument - Determine if any floating-point values are
/// being passed to this variadic function, and set the MachineModuleInfo's
/// usesVAFloatArgument flag if so. This flag is used to emit an undefined
/// reference to _fltused on Windows, which will link in MSVCRT's
/// floating-point support.
void llvm::ComputeUsesVAFloatArgument(const CallInst &I,
MachineModuleInfo *MMI)
{
FunctionType *FT = cast<FunctionType>(
I.getCalledValue()->getType()->getContainedType(0));
if (FT->isVarArg() && !MMI->usesVAFloatArgument()) {
for (unsigned i = 0, e = I.getNumArgOperands(); i != e; ++i) {
Type* T = I.getArgOperand(i)->getType();
for (auto i : post_order(T)) {
if (i->isFloatingPointTy()) {
MMI->setUsesVAFloatArgument(true);
return;
}
}
}
}
}
/// AddLandingPadInfo - Extract the exception handling information from the
/// landingpad instruction and add them to the specified machine module info.
void llvm::AddLandingPadInfo(const LandingPadInst &I, MachineModuleInfo &MMI,
MachineBasicBlock *MBB) {
if (const auto *PF = dyn_cast<Function>(
I.getParent()->getParent()->getPersonalityFn()->stripPointerCasts()))
MMI.addPersonality(PF);
if (I.isCleanup())
MMI.addCleanup(MBB);
// FIXME: New EH - Add the clauses in reverse order. This isn't 100% correct,
// but we need to do it this way because of how the DWARF EH emitter
// processes the clauses.
for (unsigned i = I.getNumClauses(); i != 0; --i) {
Value *Val = I.getClause(i - 1);
if (I.isCatch(i - 1)) {
MMI.addCatchTypeInfo(MBB,
dyn_cast<GlobalValue>(Val->stripPointerCasts()));
} else {
// Add filters in a list.
Constant *CVal = cast<Constant>(Val);
SmallVector<const GlobalValue*, 4> FilterList;
for (User::op_iterator
II = CVal->op_begin(), IE = CVal->op_end(); II != IE; ++II)
FilterList.push_back(cast<GlobalValue>((*II)->stripPointerCasts()));
MMI.addFilterTypeInfo(MBB, FilterList);
}
}
}
unsigned
FunctionLoweringInfo::getOrCreateSwiftErrorVReg(const MachineBasicBlock *MBB,
const Value *Val) {