6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

Down-scale slot index distance to save bits.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187438 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2013-07-30 19:59:19 +00:00
parent c0c9205811
commit c0173e6f9f
2 changed files with 8 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
include/llvm/CodeGen/SlotIndexes.h
View File

@@ -218,6 +218,13 @@ namespace llvm {
return other.getIndex() - getIndex(); return other.getIndex() - getIndex();
} }
/// Return the scaled distance from this index to the given one, where all
/// slots on the same instruction have zero distance.
int getInstrDistance(SlotIndex other) const {
return (other.listEntry()->getIndex() - listEntry()->getIndex())
/ Slot_Count;
}
/// isBlock - Returns true if this is a block boundary slot. /// isBlock - Returns true if this is a block boundary slot.
bool isBlock() const { return getSlot() == Slot_Block; } bool isBlock() const { return getSlot() == Slot_Block; }

2
lib/CodeGen/RegAllocGreedy.cpp
View File

@@ -419,7 +419,7 @@ void RAGreedy::enqueue(LiveInterval *LI) {
// Allocate original local ranges in linear instruction order. Since they // Allocate original local ranges in linear instruction order. Since they
// are singly defined, this produces optimal coloring in the absence of // are singly defined, this produces optimal coloring in the absence of
// global interference and other constraints. // global interference and other constraints.
Prio = LI->beginIndex().distance(Indexes->getLastIndex()); Prio = LI->beginIndex().getInstrDistance(Indexes->getLastIndex());
} }
else { else {
// Allocate global and split ranges in long->short order. Long ranges that // Allocate global and split ranges in long->short order. Long ranges that