6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-13 22:24:07 +00:00
Code Issues Projects Releases Wiki Activity

Refactor a lot of patchpoint/stackmap related code to simplify and make it

Browse Source 
target independent.

Most of the x86 specific stackmap/patchpoint handling was necessitated by the
use of the native address-mode format for frame index operands. PEI has now
been modified to treat stackmap/patchpoint similarly to DEBUG_INFO, allowing
us to use a simple, platform independent register/offset pair for frame
indexes on stackmap/patchpoints.

Notes:
  - Folding is now platform independent and automatically supported.
  - Emiting patchpoints with direct memory references now just involves calling
    the TargetLoweringBase::emitPatchPoint utility method from the target's
    XXXTargetLowering::EmitInstrWithCustomInserter method. (See
    X86TargetLowering for an example).
  - No more ugly platform-specific operand parsers.

This patch shouldn't change the generated output for X86. 



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195944 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames
2013-11-29 03:07:54 +00:00
parent 7fd70e7b0c
commit 1cbca515b6
11 changed files with 222 additions and 241 deletions
Download Patch File Download Diff File Expand all files Collapse all files

64
lib/CodeGen/StackMaps.cpp
View File

@ -13,6 +13,7 @@
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCObjectFileInfo.h"
@ -65,6 +66,60 @@ unsigned PatchPointOpers::getNextScratchIdx(unsigned StartIdx) const {
return ScratchIdx;
}
std::pair<StackMaps::Location, MachineInstr::const_mop_iterator>
StackMaps::parseOperand(MachineInstr::const_mop_iterator MOI,
MachineInstr::const_mop_iterator MOE) {
const MachineOperand &MOP = *MOI;
assert(!MOP.isRegMask() && (!MOP.isReg() || !MOP.isImplicit()) &&
"Register mask and implicit operands should not be processed.");
if (MOP.isImm()) {
// Verify anyregcc
// [<def>], <id>, <numBytes>, <target>, <numArgs>, <cc>, ...
switch (MOP.getImm()) {
default: llvm_unreachable("Unrecognized operand type.");
case StackMaps::DirectMemRefOp: {
unsigned Size = AP.TM.getDataLayout()->getPointerSizeInBits();
assert((Size % 8) == 0 && "Need pointer size in bytes.");
Size /= 8;
unsigned Reg = (++MOI)->getReg();
int64_t Imm = (++MOI)->getImm();
return std::make_pair(
Location(StackMaps::Location::Direct, Size, Reg, Imm), ++MOI);
}
case StackMaps::IndirectMemRefOp: {
int64_t Size = (++MOI)->getImm();
assert(Size > 0 && "Need a valid size for indirect memory locations.");
unsigned Reg = (++MOI)->getReg();
int64_t Imm = (++MOI)->getImm();
return std::make_pair(
Location(StackMaps::Location::Indirect, Size, Reg, Imm), ++MOI);
}
case StackMaps::ConstantOp: {
++MOI;
assert(MOI->isImm() && "Expected constant operand.");
int64_t Imm = MOI->getImm();
return std::make_pair(
Location(Location::Constant, sizeof(int64_t), 0, Imm), ++MOI);
}
}
}
// Otherwise this is a reg operand. The physical register number will
// ultimately be encoded as a DWARF regno. The stack map also records the size
// of a spill slot that can hold the register content. (The runtime can
// track the actual size of the data type if it needs to.)
assert(MOP.isReg() && "Expected register operand here.");
assert(TargetRegisterInfo::isPhysicalRegister(MOP.getReg()) &&
"Virtreg operands should have been rewritten before now.");
const TargetRegisterClass *RC =
AP.TM.getRegisterInfo()->getMinimalPhysRegClass(MOP.getReg());
assert(!MOP.getSubReg() && "Physical subreg still around.");
return std::make_pair(
Location(Location::Register, RC->getSize(), MOP.getReg(), 0), ++MOI);
}
void StackMaps::recordStackMapOpers(const MachineInstr &MI, uint32_t ID,
MachineInstr::const_mop_iterator MOI,
MachineInstr::const_mop_iterator MOE,
@ -78,7 +133,7 @@ void StackMaps::recordStackMapOpers(const MachineInstr &MI, uint32_t ID,
if (recordResult) {
std::pair<Location, MachineInstr::const_mop_iterator> ParseResult =
OpParser(MI.operands_begin(), llvm::next(MI.operands_begin()), AP.TM);
parseOperand(MI.operands_begin(), llvm::next(MI.operands_begin()));
Location &Loc = ParseResult.first;
assert(Loc.LocType == Location::Register &&
@ -87,10 +142,8 @@ void StackMaps::recordStackMapOpers(const MachineInstr &MI, uint32_t ID,
}
while (MOI != MOE) {
std::pair<Location, MachineInstr::const_mop_iterator> ParseResult =
OpParser(MOI, MOE, AP.TM);
Location &Loc = ParseResult.first;
Location Loc;
tie(Loc, MOI) = parseOperand(MOI, MOE);
// Move large constants into the constant pool.
if (Loc.LocType == Location::Constant && (Loc.Offset & ~0xFFFFFFFFULL)) {
@ -99,7 +152,6 @@ void StackMaps::recordStackMapOpers(const MachineInstr &MI, uint32_t ID,
}
CallsiteLocs.push_back(Loc);
MOI = ParseResult.second;
}
const MCExpr *CSOffsetExpr = MCBinaryExpr::CreateSub(