Changes in directory llvm/lib/CodeGen:
LiveIntervalAnalysis.cpp updated: 1.232 -> 1.233
---
Log message:
Trivially re-materializable instructions have spill weights that are half of
what it would be otherwise.
---
Diffs of the changes: (+6 -6)
LiveIntervalAnalysis.cpp | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
Index: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
diff -u llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.232
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.233
--- llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.232 Mon Apr 2 13:49:18 2007
+++ llvm/lib/CodeGen/LiveIntervalAnalysis.cpp Wed Apr 4 02:04:55 2007
@@ -164,13 +164,13 @@
unsigned reg = rep(mop.getReg());
mii->getOperand(i).setReg(reg);
- // If the definition instruction is re-materializable, its spill
- // weight is zero.
LiveInterval &RegInt = getInterval(reg);
- if (!RegInt.remat) {
- RegInt.weight +=
- (mop.isUse() + mop.isDef()) * pow(10.0F, (int)loopDepth);
- }
+ float w = (mop.isUse()+mop.isDef()) * powf(10.0F,
(float)loopDepth);
+ // If the definition instruction is re-materializable, its spill
+ // weight is half of what it would have been normally.
+ if (RegInt.remat)
+ w /= 2;
+ RegInt.weight += w;
}
}
++mii;
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