[llvm-commits] CVS: llvm/lib/CodeGen/LiveVariables.cpp
Chris Lattner
lattner at cs.uiuc.edu
Sun Feb 8 19:44:02 PST 2004
Changes in directory llvm/lib/CodeGen:
LiveVariables.cpp updated: 1.18 -> 1.19
---
Log message:
Ugh, perform an optimization that GCC should be able to do itself. This
speeds up livevar from .48/.32s -> .45/.31s in LLC on perlbmk
---
Diffs of the changes: (+7 -6)
Index: llvm/lib/CodeGen/LiveVariables.cpp
diff -u llvm/lib/CodeGen/LiveVariables.cpp:1.18 llvm/lib/CodeGen/LiveVariables.cpp:1.19
--- llvm/lib/CodeGen/LiveVariables.cpp:1.18 Sun Feb 8 19:35:21 2004
+++ llvm/lib/CodeGen/LiveVariables.cpp Sun Feb 8 19:43:23 2004
@@ -146,14 +146,15 @@
for (const unsigned *AliasSet = RegInfo->getAliasSet(Reg);
*AliasSet; ++AliasSet) {
- if (MachineInstr *LastUse = PhysRegInfo[*AliasSet]) {
- if (PhysRegUsed[*AliasSet])
- RegistersKilled.insert(std::make_pair(LastUse, *AliasSet));
+ unsigned Alias = *AliasSet;
+ if (MachineInstr *LastUse = PhysRegInfo[Alias]) {
+ if (PhysRegUsed[Alias])
+ RegistersKilled.insert(std::make_pair(LastUse, Alias));
else
- RegistersDead.insert(std::make_pair(LastUse, *AliasSet));
+ RegistersDead.insert(std::make_pair(LastUse, Alias));
}
- PhysRegInfo[*AliasSet] = MI;
- PhysRegUsed[*AliasSet] = false;
+ PhysRegInfo[Alias] = MI;
+ PhysRegUsed[Alias] = false;
}
}
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