mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-23 12:40:17 +00:00
CodeGenPrepare: Move ret duplication out of the instruction iteration loop.
It can delete the block, and the loop continues on free'd memory. No change in output. Found by valgrind. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168525 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
5d1e089eaa
commit
4ccb49a838
@ -125,7 +125,7 @@ namespace {
|
|||||||
bool MoveExtToFormExtLoad(Instruction *I);
|
bool MoveExtToFormExtLoad(Instruction *I);
|
||||||
bool OptimizeExtUses(Instruction *I);
|
bool OptimizeExtUses(Instruction *I);
|
||||||
bool OptimizeSelectInst(SelectInst *SI);
|
bool OptimizeSelectInst(SelectInst *SI);
|
||||||
bool DupRetToEnableTailCallOpts(ReturnInst *RI);
|
bool DupRetToEnableTailCallOpts(BasicBlock *BB);
|
||||||
bool PlaceDbgValues(Function &F);
|
bool PlaceDbgValues(Function &F);
|
||||||
};
|
};
|
||||||
}
|
}
|
||||||
@ -689,10 +689,14 @@ bool CodeGenPrepare::OptimizeCallInst(CallInst *CI) {
|
|||||||
/// %tmp2 = tail call i32 @f2()
|
/// %tmp2 = tail call i32 @f2()
|
||||||
/// ret i32 %tmp2
|
/// ret i32 %tmp2
|
||||||
/// @endcode
|
/// @endcode
|
||||||
bool CodeGenPrepare::DupRetToEnableTailCallOpts(ReturnInst *RI) {
|
bool CodeGenPrepare::DupRetToEnableTailCallOpts(BasicBlock *BB) {
|
||||||
if (!TLI)
|
if (!TLI)
|
||||||
return false;
|
return false;
|
||||||
|
|
||||||
|
ReturnInst *RI = dyn_cast<ReturnInst>(BB->getTerminator());
|
||||||
|
if (!RI)
|
||||||
|
return false;
|
||||||
|
|
||||||
PHINode *PN = 0;
|
PHINode *PN = 0;
|
||||||
BitCastInst *BCI = 0;
|
BitCastInst *BCI = 0;
|
||||||
Value *V = RI->getReturnValue();
|
Value *V = RI->getReturnValue();
|
||||||
@ -706,7 +710,6 @@ bool CodeGenPrepare::DupRetToEnableTailCallOpts(ReturnInst *RI) {
|
|||||||
return false;
|
return false;
|
||||||
}
|
}
|
||||||
|
|
||||||
BasicBlock *BB = RI->getParent();
|
|
||||||
if (PN && PN->getParent() != BB)
|
if (PN && PN->getParent() != BB)
|
||||||
return false;
|
return false;
|
||||||
|
|
||||||
@ -1319,9 +1322,6 @@ bool CodeGenPrepare::OptimizeInst(Instruction *I) {
|
|||||||
if (CallInst *CI = dyn_cast<CallInst>(I))
|
if (CallInst *CI = dyn_cast<CallInst>(I))
|
||||||
return OptimizeCallInst(CI);
|
return OptimizeCallInst(CI);
|
||||||
|
|
||||||
if (ReturnInst *RI = dyn_cast<ReturnInst>(I))
|
|
||||||
return DupRetToEnableTailCallOpts(RI);
|
|
||||||
|
|
||||||
if (SelectInst *SI = dyn_cast<SelectInst>(I))
|
if (SelectInst *SI = dyn_cast<SelectInst>(I))
|
||||||
return OptimizeSelectInst(SI);
|
return OptimizeSelectInst(SI);
|
||||||
|
|
||||||
@ -1339,6 +1339,8 @@ bool CodeGenPrepare::OptimizeBlock(BasicBlock &BB) {
|
|||||||
while (CurInstIterator != BB.end())
|
while (CurInstIterator != BB.end())
|
||||||
MadeChange |= OptimizeInst(CurInstIterator++);
|
MadeChange |= OptimizeInst(CurInstIterator++);
|
||||||
|
|
||||||
|
MadeChange |= DupRetToEnableTailCallOpts(&BB);
|
||||||
|
|
||||||
return MadeChange;
|
return MadeChange;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
Loading…
Reference in New Issue
Block a user