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nv50/ir: Add support code for calculating the clobber set of a BB or function.

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This commit is contained in:
Francisco Jerez 2012-03-21 21:43:26 +01:00 • committed by Christoph Bumiller
parent d6d1f0e4a2
commit 3e9150cd96
3 changed files with 34 additions and 0 deletions
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3
src/gallium/drivers/nv50/codegen/nv50_ir.h
View file

@ -887,6 +887,7 @@ public:
Graph::Node dom;
BitSet liveSet;
BitSet defSet;
uint32_t binPos;
uint32_t binSize;
@ -937,6 +938,7 @@ public:
inline LValue *getLValue(int id);
void buildDefSets();
bool convertToSSA();
public:
@ -960,6 +962,7 @@ public:
private:
void buildLiveSetsPreSSA(BasicBlock *, const int sequence);
void buildDefSetsPreSSA(BasicBlock *bb, const int seq);
private:
int id;

10
src/gallium/drivers/nv50/codegen/nv50_ir_bb.cpp
View file

@ -415,6 +415,16 @@ Function::orderInstructions(ArrayList &result)
return result.getSize();
}
void
Function::buildDefSets()
{
for (unsigned i = 0; i <= loopNestingBound; ++i)
buildDefSetsPreSSA(BasicBlock::get(cfgExit), cfg.nextSequence());
for (ArrayList::Iterator bi = allBBlocks.iterator(); !bi.end(); bi.next())
BasicBlock::get(bi)->liveSet.marker = false;
}
bool
Pass::run(Program *prog, bool ordered, bool skipPhi)
{

21
src/gallium/drivers/nv50/codegen/nv50_ir_ssa.cpp
View file

@ -256,6 +256,27 @@ Function::buildLiveSetsPreSSA(BasicBlock *bb, const int seq)
bb->liveSet |= usedBeforeAssigned;
}
void
Function::buildDefSetsPreSSA(BasicBlock *bb, const int seq)
{
bb->defSet.allocate(allLValues.getSize(), !bb->liveSet.marker);
bb->liveSet.marker = true;
for (Graph::EdgeIterator ei = bb->cfg.incident(); !ei.end(); ei.next()) {
BasicBlock *in = BasicBlock::get(ei.getNode());
if (in->cfg.visit(seq))
buildDefSetsPreSSA(in, seq);
bb->defSet |= in->defSet;
}
for (Instruction *i = bb->getEntry(); i; i = i->next) {
for (int d = 0; i->defExists(d); ++d)
bb->defSet.set(i->getDef(d)->id);
}
}
class RenamePass
{
public: