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Handle the [nonatomic] attribute in IRGen and LLVM passes.

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Properly lower reference counting SIL instructions with nonatomic attribute as invocations of corresponding non-atomic reference counting runtime functions.
This commit is contained in:
Roman Levenstein
2016-04-05 12:57:50 -07:00
parent 2e77b3990b
commit d8e28bb690
20 changed files with 677 additions and 272 deletions
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54
lib/LLVMPasses/LLVMARCContract.cpp
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@@ -100,7 +100,14 @@ performRRNOptimization(DenseMap<Value *, LocalState> &PtrToLocalStateMap) {
// Create the retainN call right by the first retain.
B.setInsertPoint(RetainList[0]);
O = RetainList[0]->getArgOperand(0);
B.createRetainN(RC->getSwiftRCIdentityRoot(O), RetainList.size());
auto *RI = RetainList[0];
for (auto R : RetainList) {
if (B.isAtomic(R)) {
RI = R;
break;
}
}
B.createRetainN(RC->getSwiftRCIdentityRoot(O), RetainList.size(), RI);
// Replace all uses of the retain instructions with our new retainN and
// then delete them.
@@ -119,7 +126,14 @@ performRRNOptimization(DenseMap<Value *, LocalState> &PtrToLocalStateMap) {
auto *OldCI = ReleaseList[ReleaseList.size() - 1];
B.setInsertPoint(OldCI);
O = OldCI->getArgOperand(0);
B.createReleaseN(RC->getSwiftRCIdentityRoot(O), ReleaseList.size());
auto *RI = OldCI;
for (auto R : ReleaseList) {
if (B.isAtomic(R)) {
RI = R;
break;
}
}
B.createReleaseN(RC->getSwiftRCIdentityRoot(O), ReleaseList.size(), RI);
// Remove all old release instructions.
for (auto *Inst : ReleaseList) {
@@ -136,8 +150,15 @@ performRRNOptimization(DenseMap<Value *, LocalState> &PtrToLocalStateMap) {
// Create the retainN call right by the first retain.
B.setInsertPoint(UnknownRetainList[0]);
O = UnknownRetainList[0]->getArgOperand(0);
auto *RI = UnknownRetainList[0];
for (auto R : UnknownRetainList) {
if (B.isAtomic(R)) {
RI = R;
break;
}
}
B.createUnknownRetainN(RC->getSwiftRCIdentityRoot(O),
UnknownRetainList.size());
UnknownRetainList.size(), RI);
// Replace all uses of the retain instructions with our new retainN and
// then delete them.
@@ -156,8 +177,15 @@ performRRNOptimization(DenseMap<Value *, LocalState> &PtrToLocalStateMap) {
auto *OldCI = UnknownReleaseList[UnknownReleaseList.size() - 1];
B.setInsertPoint(OldCI);
O = OldCI->getArgOperand(0);
auto *RI = OldCI;
for (auto R : UnknownReleaseList) {
if (B.isAtomic(R)) {
RI = R;
break;
}
}
B.createUnknownReleaseN(RC->getSwiftRCIdentityRoot(O),
UnknownReleaseList.size());
UnknownReleaseList.size(), RI);
// Remove all old release instructions.
for (auto *Inst : UnknownReleaseList) {
@@ -175,9 +203,16 @@ performRRNOptimization(DenseMap<Value *, LocalState> &PtrToLocalStateMap) {
auto *OldCI = BridgeRetainList[0];
B.setInsertPoint(OldCI);
O = OldCI->getArgOperand(0);
auto *RI = OldCI;
for (auto R : BridgeRetainList) {
if (B.isAtomic(R)) {
RI = R;
break;
}
}
// Bridge retain may modify the input reference before forwarding it.
auto *I = B.createBridgeRetainN(RC->getSwiftRCIdentityRoot(O),
BridgeRetainList.size());
BridgeRetainList.size(), RI);
// Remove all old retain instructions.
for (auto *Inst : BridgeRetainList) {
@@ -196,8 +231,15 @@ performRRNOptimization(DenseMap<Value *, LocalState> &PtrToLocalStateMap) {
auto *OldCI = BridgeReleaseList[BridgeReleaseList.size() - 1];
B.setInsertPoint(OldCI);
O = OldCI->getArgOperand(0);
auto *RI = OldCI;
for (auto R : BridgeReleaseList) {
if (B.isAtomic(R)) {
RI = R;
break;
}
}
B.createBridgeReleaseN(RC->getSwiftRCIdentityRoot(O),
BridgeReleaseList.size());
BridgeReleaseList.size(), RI);
// Remove all old release instructions.
for (auto *Inst : BridgeReleaseList) {