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Revert r135121 which broke a gcc-4.2 builder.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135122 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-07-14 00:58:38 +00:00
parent 6a9feaac93
commit 4fcfcf4984
3 changed files with 11 additions and 70 deletions
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17
lib/CodeGen/InterferenceCache.cpp
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@@ -14,7 +14,6 @@
#define DEBUG_TYPE "regalloc"
#include "InterferenceCache.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
@@ -41,18 +40,9 @@ InterferenceCache::Entry *InterferenceCache::get(unsigned PhysReg) {
E = RoundRobin;
if (++RoundRobin == CacheEntries)
RoundRobin = 0;
for (unsigned i = 0; i != CacheEntries; ++i) {
// Skip entries that are in use.
if (Entries[E].hasRefs()) {
if (++E == CacheEntries)
E = 0;
continue;
}
Entries[E].reset(PhysReg, LIUArray, TRI, MF);
PhysRegEntries[PhysReg] = E;
return &Entries[E];
}
llvm_unreachable("Ran out of interference cache entries.");
Entries[E].reset(PhysReg, LIUArray, TRI, MF);
PhysRegEntries[PhysReg] = E;
return &Entries[E];
}
/// revalidate - LIU contents have changed, update tags.
@@ -69,7 +59,6 @@ void InterferenceCache::Entry::reset(unsigned physReg,
LiveIntervalUnion *LIUArray,
const TargetRegisterInfo *TRI,
const MachineFunction *MF) {
assert(!hasRefs() && "Cannot reset cache entry with references");
// LIU's changed, invalidate cache.
++Tag;
PhysReg = physReg;