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LiveInterval: Fix SubRange memory leak.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228405 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun
2015-02-06 17:28:47 +00:00
parent 1e022d0859
commit e81cc348ac
2 changed files with 24 additions and 4 deletions
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17
lib/CodeGen/LiveInterval.cpp
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@ -598,6 +598,11 @@ VNInfo *LiveRange::MergeValueNumberInto(VNInfo *V1, VNInfo *V2) {
return V2;
}
void LiveInterval::freeSubRange(SubRange *S) {
S->~SubRange();
// Memory was allocated with BumpPtr allocator and is not freed here.
}
void LiveInterval::removeEmptySubRanges() {
SubRange **NextPtr = &SubRanges;
SubRange *I = *NextPtr;
@ -609,12 +614,22 @@ void LiveInterval::removeEmptySubRanges() {
}
// Skip empty subranges until we find the first nonempty one.
do {
I = I->Next;
SubRange *Next = I->Next;
freeSubRange(I);
I = Next;
} while (I != nullptr && I->empty());
*NextPtr = I;
}
}
void LiveInterval::clearSubRanges() {
for (SubRange *I = SubRanges, *Next; I != nullptr; I = Next) {
Next = I->Next;
freeSubRange(I);
}
SubRanges = nullptr;
}
/// Helper function for constructMainRangeFromSubranges(): Search the CFG
/// backwards until we find a place covered by a LiveRange segment that actually
/// has a valno set.