diff options
author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-08-05 23:50:31 +0000 |
---|---|---|
committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-08-05 23:50:31 +0000 |
commit | a9c41d39d1adc92107e095aca6f851aed71b6a5f (patch) | |
tree | 6d509a95a8057901280d067ba8cf03a47056405a /lib/CodeGen | |
parent | 1f8804263ffc5e6843d81f5c7bd9c739aa90fde5 (diff) | |
download | external_llvm-a9c41d39d1adc92107e095aca6f851aed71b6a5f.zip external_llvm-a9c41d39d1adc92107e095aca6f851aed71b6a5f.tar.gz external_llvm-a9c41d39d1adc92107e095aca6f851aed71b6a5f.tar.bz2 |
Only mark remainder intervals as RS_Spill after per-block splitting.
The local ranges created get to stay in the RS_New stage, just like for
local and region splitting.
This gives tryLocalSplit a bit more freedom the first time it sees one
of these new local ranges.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137001 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
-rw-r--r-- | lib/CodeGen/RegAllocGreedy.cpp | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lib/CodeGen/RegAllocGreedy.cpp b/lib/CodeGen/RegAllocGreedy.cpp index 291db7b..450f008 100644 --- a/lib/CodeGen/RegAllocGreedy.cpp +++ b/lib/CodeGen/RegAllocGreedy.cpp @@ -1227,12 +1227,22 @@ unsigned RAGreedy::tryBlockSplit(LiveInterval &VirtReg, AllocationOrder &Order, return 0; // We did split for some blocks. - SE->finish(); + SmallVector<unsigned, 8> IntvMap; + SE->finish(&IntvMap); // Tell LiveDebugVariables about the new ranges. DebugVars->splitRegister(Reg, LREdit.regs()); - setStage(NewVRegs.begin(), NewVRegs.end(), RS_Spill); + ExtraRegInfo.resize(MRI->getNumVirtRegs()); + + // Sort out the new intervals created by splitting. The remainder interval + // goes straight to spilling, the new local ranges get to stay RS_New. + for (unsigned i = 0, e = LREdit.size(); i != e; ++i) { + LiveInterval &LI = *LREdit.get(i); + if (getStage(LI) == RS_New && IntvMap[i] == 0) + setStage(LI, RS_Spill); + } + if (VerifyEnabled) MF->verify(this, "After splitting live range around basic blocks"); return 0; |