diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-02-04 05:20:49 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-02-04 05:20:49 +0000 |
| commit | 3b1088a2cc15a39c7a7b8dd95a56143f1dda6863 (patch) | |
| tree | ce23a7d61d6e930ded118c1537fa962ac6df2b09 /lib/CodeGen/SplitKit.cpp | |
| parent | edc8db87dc2ed4d2971e7f50464f5f4d0fead537 (diff) | |
Don't store COPY pointers in VNInfo.
If a value is defined by a COPY, that instuction can easily and cheaply
be found by getInstructionFromIndex(VNI->def).
This reduces the size of VNInfo from 24 to 16 bytes, and improves
llc compile time by 3%.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149763 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SplitKit.cpp')
| -rw-r--r-- | lib/CodeGen/SplitKit.cpp | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp index 66c8e84c13..ab9b524ecc 100644 --- a/lib/CodeGen/SplitKit.cpp +++ b/lib/CodeGen/SplitKit.cpp @@ -374,7 +374,7 @@ VNInfo *SplitEditor::defValue(unsigned RegIdx, LiveInterval *LI = Edit->get(RegIdx); // Create a new value. - VNInfo *VNI = LI->getNextValue(Idx, 0, LIS.getVNInfoAllocator()); + VNInfo *VNI = LI->getNextValue(Idx, LIS.getVNInfoAllocator()); // Use insert for lookup, so we can add missing values with a second lookup. std::pair<ValueMap::iterator, bool> InsP = @@ -449,9 +449,7 @@ VNInfo *SplitEditor::defFromParent(unsigned RegIdx, } // Define the value in Reg. - VNInfo *VNI = defValue(RegIdx, ParentVNI, Def); - VNI->setCopy(CopyMI); - return VNI; + return defValue(RegIdx, ParentVNI, Def); } /// Create a new virtual register and live interval. @@ -1053,7 +1051,6 @@ void SplitEditor::finish(SmallVectorImpl<unsigned> *LRMap) { unsigned RegIdx = RegAssign.lookup(ParentVNI->def); VNInfo *VNI = defValue(RegIdx, ParentVNI, ParentVNI->def); VNI->setIsPHIDef(ParentVNI->isPHIDef()); - VNI->setCopy(ParentVNI->getCopy()); // Force rematted values to be recomputed everywhere. // The new live ranges may be truncated. |