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| author | Andrew Trick <atrick@apple.com> | 2010-12-09 18:15:21 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2010-12-09 18:15:21 +0000 |
| commit | b853e6c3702149cdbbd6fa404334e3ba0055641a (patch) | |
| tree | 2daa08a7cd8703e8d397588a903545c4dfb965d9 /lib/CodeGen/LiveIntervalUnion.cpp | |
| parent | f2f516fc2680168caac9981a4dd17cc37c639c71 (diff) | |
| download | llvm-b853e6c3702149cdbbd6fa404334e3ba0055641a.tar.gz llvm-b853e6c3702149cdbbd6fa404334e3ba0055641a.tar.bz2 llvm-b853e6c3702149cdbbd6fa404334e3ba0055641a.tar.xz | |
Added register reassignment prototype to RAGreedy. It's a simple
heuristic to reshuffle register assignments when we can't find an
available reg.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121388 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveIntervalUnion.cpp')
| -rw-r--r-- | lib/CodeGen/LiveIntervalUnion.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/CodeGen/LiveIntervalUnion.cpp b/lib/CodeGen/LiveIntervalUnion.cpp index 1fca034fdc..d5c7bf08eb 100644 --- a/lib/CodeGen/LiveIntervalUnion.cpp +++ b/lib/CodeGen/LiveIntervalUnion.cpp @@ -247,10 +247,13 @@ collectInterferingVRegs(unsigned MaxInterferingRegs) { if (!IR.LiveUnionI.value()->isSpillable()) SeenUnspillableVReg = true; - InterferingVRegs.push_back(IR.LiveUnionI.value()); if (InterferingVRegs.size() == MaxInterferingRegs) + // Leave SeenAllInterferences set to false to indicate that at least one + // interference exists beyond those we collected. return MaxInterferingRegs; + InterferingVRegs.push_back(IR.LiveUnionI.value()); + // Cache the most recent interfering vreg to bypass isSeenInterference. RecentInterferingVReg = IR.LiveUnionI.value(); ++IR.LiveUnionI; |