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nv50/ir: fix insertHead and remove for BBs with PHI ops only

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This commit is contained in:
Christoph Bumiller 2011-11-16 00:39:41 +01:00
parent 349cb60ed5
commit fc740e7924
1 changed files with 10 additions and 3 deletions
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13
src/gallium/drivers/nv50/codegen/nv50_ir_bb.cpp
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@ -104,7 +104,7 @@ BasicBlock::insertHead(Instruction *inst)
insertBefore(entry, inst);
} else {
if (phi) {
insertAfter(phi, inst);
insertAfter(exit, inst); // after last phi
} else {
assert(!exit);
entry = exit = inst;
@ -211,8 +211,15 @@ BasicBlock::remove(Instruction *insn)
else
exit = insn->prev;
if (insn == entry)
entry = insn->next ? insn->next : insn->prev;
if (insn == entry) {
if (insn->next)
entry = insn->next;
else
if (insn->prev && insn->prev->op != OP_PHI)
entry = insn->prev;
else
entry = NULL;
}
if (insn == phi)
phi = (insn->next && insn->next->op == OP_PHI) ? insn->next : 0;