zdoom/gzdoom
0
0
Fork 0
mirror of https://github.com/ZDoom/gzdoom.git synced 2024-11-26 22:11:43 +00:00
Code Issues Projects Releases Packages Wiki Activity

Fix label bug

Browse source
This commit is contained in:
Magnus Norddahl 2020-05-15 02:05:34 +02:00
parent c670e0b016
commit 81c31bebe9
3 changed files with 32 additions and 55 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

80
src/common/scripting/jit/jit.cpp
View file

@ -102,17 +102,15 @@ IRFunction* JitCompiler::Codegen()
cc.CreateBr(labels[i].block);
cc.SetInsertPoint(labels[i].block);
}
else
else // Save start location in case GetLabel gets called later
{
if (!cc.GetInsertBlock())
cc.SetInsertPoint(irfunc->createBasicBlock({}));
// Save start location in case GetLabel gets called later
labels[i].block = cc.GetInsertBlock();
if (!labels[i].block->code.empty())
labels[i].instbefore = labels[i].block->code.back();
}
labels[i].index = labels[i].block->code.size();
int curLine = sfunc->PCToLine(pc);
if (curLine != lastLine)
{
@ -144,8 +142,6 @@ IRFunction* JitCompiler::Codegen()
pc++;
}
BindLabels();
/*
auto code = cc.getCode ();
for (unsigned int j = 0; j < LineInfo.Size (); j++)
@ -182,24 +178,6 @@ void JitCompiler::EmitOpcode()
}
}
void JitCompiler::BindLabels()
{
#if 0
asmjit::CBNode *cursor = cc.getCursor();
unsigned int size = labels.Size();
for (unsigned int i = 0; i < size; i++)
{
const OpcodeLabel &label = labels[i];
if (label.inUse)
{
cc.setCursor(label.cursor);
cc.bind(label.label);
}
}
cc.setCursor(cursor);
#endif
}
void JitCompiler::CheckVMFrame()
{
if (!vmframe)
@ -219,37 +197,37 @@ IRValue* JitCompiler::GetCallReturns()
IRBasicBlock* JitCompiler::GetLabel(size_t pos)
{
if (labels[pos].instbefore)
if (labels[pos].index != 0) // Jump targets can only point at the start of a basic block
{
IRValue* instbefore = labels[pos].instbefore;
IRBasicBlock* block = labels[pos].block;
IRBasicBlock* curbb = labels[pos].block;
size_t splitpos = labels[pos].index;
// If inst isn't the first then we need to split the basicblock. Jump targets can only be the start of a basicblock.
if (instbefore)
// Split basic block
IRBasicBlock* newlabelbb = irfunc->createBasicBlock({});
auto itbegin = curbb->code.begin() + splitpos;
auto itend = curbb->code.end();
newlabelbb->code.insert(newlabelbb->code.begin(), itbegin, itend);
curbb->code.erase(itbegin, itend);
// Jump from prev block to next
IRBasicBlock* old = cc.GetInsertBlock();
cc.SetInsertPoint(curbb);
cc.CreateBr(newlabelbb);
cc.SetInsertPoint(old);
// Update label
labels[pos].block = newlabelbb;
labels[pos].index = 0;
// Update other label references
for (size_t i = 0; i < labels.Size(); i++)
{
auto it = block->code.end();
for (size_t i = 0; i < block->code.size(); i++)
if (labels[i].block == curbb && labels[i].index >= splitpos)
{
if (block->code[i] == instbefore)
{
it = block->code.begin() + (i + 1);
break;
}
labels[i].block = newlabelbb;
labels[i].index -= splitpos;
}
// Split basic block into two
IRBasicBlock* newlabelbb = irfunc->createBasicBlock({});
newlabelbb->code.insert(newlabelbb->code.begin(), it, block->code.end());
block->code.erase(it, block->code.end());
// Jump from prev block to next
IRBasicBlock* old = cc.GetInsertBlock();
cc.SetInsertPoint(block);
cc.CreateBr(newlabelbb);
cc.SetInsertPoint(old);
}
labels[pos].instbefore = nullptr;
}
else if (!labels[pos].block)
{
@ -389,7 +367,7 @@ void JitCompiler::SetupFullVMFrame()
StoreF(Load(ToDoublePtr(vmframe, offsetF + i * sizeof(double))), i);
for (int i = 0; i < sfunc->NumRegS; i++)
StoreS(Load(ToInt8PtrPtr(vmframe, offsetS + i * sizeof(FString))), i);
StoreS(OffsetPtr(vmframe, offsetS + i * sizeof(FString)), i);
for (int i = 0; i < sfunc->NumRegA; i++)
StoreA(Load(ToInt8PtrPtr(vmframe, offsetA + i * sizeof(void*))), i);

4
src/common/scripting/jit/jit_flow.cpp
View file

@ -87,7 +87,7 @@ void JitCompiler::EmitRET()
cc.CreateCondBr(cc.CreateICmpSLE(ConstValueD(retnum), numret), ifbb, endifbb);
cc.SetInsertPoint(ifbb);
IRValue* location = Load(ToInt8PtrPtr(ret, retnum * sizeof(VMReturn)));
IRValue* location = OffsetPtr(ret, retnum * sizeof(VMReturn));
int regtype = B;
int regnum = C;
@ -185,7 +185,7 @@ void JitCompiler::EmitRETI()
cc.CreateCondBr(cc.CreateICmpSLE(ConstValueD(retnum), numret), ifbb, endifbb);
cc.SetInsertPoint(ifbb);
IRValue* location = Load(ToInt8PtrPtr(ret, retnum * sizeof(VMReturn)));
IRValue* location = OffsetPtr(ret, retnum * sizeof(VMReturn));
Store(ConstValueD(BCs), ToInt32Ptr(location));
if (a & RET_FINAL)

3
src/common/scripting/jit/jitintern.h
View file

@ -33,7 +33,7 @@ struct JitLineInfo
struct JitLabel
{
IRBasicBlock* block = nullptr;
IRValue* instbefore = nullptr;
size_t index = 0;
};
class JitCompiler
@ -78,7 +78,6 @@ private:
void SetupFrame();
void SetupSimpleFrame();
void SetupFullVMFrame();
void BindLabels();
void EmitOpcode();
void EmitPopFrame();