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Track reference count independently from clear().

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This allows clear() to be called on a DomainValue with references.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144147 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-11-08 23:26:00 +00:00
parent ce1a538ab5
commit 737e9a2db2
1 changed files with 4 additions and 4 deletions
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8
lib/CodeGen/ExecutionDepsFix.cpp
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@ -92,10 +92,10 @@ struct DomainValue {
return CountTrailingZeros_32(AvailableDomains); return CountTrailingZeros_32(AvailableDomains);
} }
DomainValue() { clear(); } DomainValue() : Refs(0) { clear(); }
void clear() { void clear() {
Refs = AvailableDomains = Dist = 0; AvailableDomains = Dist = 0;
Instrs.clear(); Instrs.clear();
} }
}; };
@ -173,6 +173,7 @@ DomainValue *ExeDepsFix::alloc(int domain) {
dv->Dist = Distance; dv->Dist = Distance;
if (domain >= 0) if (domain >= 0)
dv->addDomain(domain); dv->addDomain(domain);
assert(dv->Refs == 0 && "Reference count wasn't cleared");
return dv; return dv;
} }
@ -271,8 +272,7 @@ bool ExeDepsFix::merge(DomainValue *A, DomainValue *B) {
A->Instrs.append(B->Instrs.begin(), B->Instrs.end()); A->Instrs.append(B->Instrs.begin(), B->Instrs.end());
// Clear the old DomainValue so we won't try to swizzle instructions twice. // Clear the old DomainValue so we won't try to swizzle instructions twice.
B->Instrs.clear(); B->clear();
B->AvailableDomains = 0;
for (unsigned rx = 0; rx != NumRegs; ++rx) for (unsigned rx = 0; rx != NumRegs; ++rx)
if (LiveRegs[rx] == B) if (LiveRegs[rx] == B)