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Reuse live interval union between functions. This saves a bit of compile time

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when compiling many small functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129321 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-04-11 23:57:14 +00:00
parent de16508955
commit 560ab9ebf7
2 changed files with 11 additions and 4 deletions
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lib/CodeGen/RegAllocBasic.cpp
+8 -4
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@@ -235,9 +235,12 @@ void RegAllocBase::init(VirtRegMap &vrm, LiveIntervals &lis) {
MRI = &vrm.getRegInfo();
VRM = &vrm;
LIS = &lis;
PhysReg2LiveUnion.init(UnionAllocator, TRI->getNumRegs());
// Cache an interferece query for each physical reg
Queries.reset(new LiveIntervalUnion::Query[PhysReg2LiveUnion.numRegs()]);
const unsigned NumRegs = TRI->getNumRegs();
if (NumRegs != PhysReg2LiveUnion.numRegs()) {
PhysReg2LiveUnion.init(UnionAllocator, NumRegs);
// Cache an interferece query for each physical reg
Queries.reset(new LiveIntervalUnion::Query[PhysReg2LiveUnion.numRegs()]);
}
}
void RegAllocBase::LiveUnionArray::clear() {
@@ -251,7 +254,8 @@ void RegAllocBase::LiveUnionArray::clear() {
}
void RegAllocBase::releaseMemory() {
PhysReg2LiveUnion.clear();
for (unsigned r = 0, e = PhysReg2LiveUnion.numRegs(); r != e; ++r)
PhysReg2LiveUnion[r].clear();
}
// Visit all the live registers. If they are already assigned to a physical