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Change:
[oota-llvm.git]
/
lib
/
CodeGen
/
UnreachableBlockElim.cpp
diff --git
a/lib/CodeGen/UnreachableBlockElim.cpp
b/lib/CodeGen/UnreachableBlockElim.cpp
index 4fdb22882471a67211e27a09f0df3ecf01e8ed91..52693f03e82822e6bb9e87b98ef324b3c717ed78 100644
(file)
--- a/
lib/CodeGen/UnreachableBlockElim.cpp
+++ b/
lib/CodeGen/UnreachableBlockElim.cpp
@@
-26,6
+26,7
@@
#include "llvm/Function.h"
#include "llvm/Pass.h"
#include "llvm/Type.h"
#include "llvm/Function.h"
#include "llvm/Pass.h"
#include "llvm/Type.h"
+#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/ProfileInfo.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Analysis/ProfileInfo.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
@@
-48,6
+49,7
@@
namespace {
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addPreserved<DominatorTree>();
AU.addPreserved<ProfileInfo>();
}
};
AU.addPreserved<ProfileInfo>();
}
};
@@
-194,8
+196,11
@@
bool UnreachableMachineBlockElim::runOnMachineFunction(MachineFunction &F) {
temp->eraseFromParent();
ModifiedPHI = true;
temp->eraseFromParent();
ModifiedPHI = true;
- if (Input != Output)
- F.getRegInfo().replaceRegWith(Output, Input);
+ if (Input != Output) {
+ MachineRegisterInfo &MRI = F.getRegInfo();
+ MRI.constrainRegClass(Input, MRI.getRegClass(Output));
+ MRI.replaceRegWith(Output, Input);
+ }
continue;
}
continue;
}