6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-20 16:17:38 +00:00
Code Issues Projects Releases Wiki Activity

Added a size field to the stack map record to handle subregister spills.

Browse Source 
Implementing this on bigendian platforms could get strange. I added a
target hook, getStackSlotRange, per Jakob's recommendation to make
this as explicit as possible.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194942 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2013-11-17 01:36:23 +00:00
parent b7dabccbce
commit bb756ca244
10 changed files with 245 additions and 82 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CodeGen/StackMaps.cpp
+15 -5
View File
@@ -41,7 +41,7 @@ void StackMaps::recordStackMap(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(), 1));
OpParser(MI.operands_begin(), llvm::next(MI.operands_begin()), AP.TM);
Location &Loc = ParseResult.first;
assert(Loc.LocType == Location::Register &&
@@ -51,7 +51,7 @@ void StackMaps::recordStackMap(const MachineInstr &MI, uint32_t ID,
while (MOI != MOE) {
std::pair<Location, MachineInstr::const_mop_iterator> ParseResult =
OpParser(MOI, MOE);
OpParser(MOI, MOE, AP.TM);
Location &Loc = ParseResult.first;
@@ -86,7 +86,7 @@ void StackMaps::recordStackMap(const MachineInstr &MI, uint32_t ID,
/// uint16 : NumLocations
/// Location[NumLocations] {
/// uint8 : Register | Direct | Indirect | Constant | ConstantIndex
/// uint8 : Reserved (location flags)
/// uint8 : Size in Bytes
/// uint16 : Dwarf RegNum
/// int32 : Offset
/// }
@@ -200,12 +200,22 @@ void StackMaps::serializeToStackMapSection() {
);
unsigned RegNo = 0;
int Offset = Loc.Offset;
if(Loc.Reg) {
RegNo = MCRI.getDwarfRegNum(Loc.Reg, false);
for (MCSuperRegIterator SR(Loc.Reg, TRI);
SR.isValid() && (int)RegNo < 0; ++SR) {
RegNo = TRI->getDwarfRegNum(*SR, false);
}
// If this is a register location, put the subregister byte offset in
// the location offset.
if (Loc.LocType == Location::Register) {
assert(!Loc.Offset && "Register location should have zero offset");
unsigned LLVMRegNo = MCRI.getLLVMRegNum(RegNo, false);
unsigned SubRegIdx = MCRI.getSubRegIndex(LLVMRegNo, Loc.Reg);
if (SubRegIdx)
Offset = MCRI.getSubRegIdxOffset(SubRegIdx);
}
}
else {
assert((Loc.LocType != Location::Register
@@ -213,9 +223,9 @@ void StackMaps::serializeToStackMapSection() {
"Missing location register");
}
AP.OutStreamer.EmitIntValue(Loc.LocType, 1);
AP.OutStreamer.EmitIntValue(0, 1); // Reserved location flags.
AP.OutStreamer.EmitIntValue(Loc.Size, 1);
AP.OutStreamer.EmitIntValue(RegNo, 2);
AP.OutStreamer.EmitIntValue(Loc.Offset, 4);
AP.OutStreamer.EmitIntValue(Offset, 4);
}
}