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Enable rematerialization of constants using AliasAnalysis::pointsToConstantMemory,

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and knowledge of PseudoSourceValues. This unfortunately isn't sufficient to allow
constants to be rematerialized in PIC mode -- the extra indirection is a
complication.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54000 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-07-25 00:02:30 +00:00
parent 3eee6542f5
commit 6d69ba8a69
6 changed files with 141 additions and 16 deletions
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8
include/llvm/CodeGen/MachineRegisterInfo.h
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@@ -206,6 +206,14 @@ public:
liveout_iterator liveout_begin() const { return LiveOuts.begin(); }
liveout_iterator liveout_end() const { return LiveOuts.end(); }
bool liveout_empty() const { return LiveOuts.empty(); }
bool isLiveIn(unsigned Reg) const {
for (livein_iterator I = livein_begin(), E = livein_end(); I != E; ++I)
if (I->first == Reg || I->second == Reg)
return true;
return false;
}
private:
void HandleVRegListReallocation();