DebugInfo: Assert dbg.declare/value insts are valid

Remove early returns for when `getVariable()` is null, and just assert
that it never happens.  The Verifier already confirms that there's a
valid variable on these intrinsics, so we should assume the debug info
isn't broken.  I also updated a check for a `!dbg` attachment, which the
Verifier similarly guarantees.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235400 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 5ffb826956e83394c26035bce1dbfaca687ecdb9..dafbc63dbd03192c4d55446c34e044bae4f017d8 100644 (file)
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -1088,8 +1088,8 @@ bool FastISel::selectIntrinsicCall(const IntrinsicInst *II) {
   }
   case Intrinsic::dbg_declare: {
     const DbgDeclareInst *DI = cast<DbgDeclareInst>(II);
-    DIVariable DIVar = DI->getVariable();
-    if (!DIVar || !FuncInfo.MF->getMMI().hasDebugInfo()) {
+    assert(DI->getVariable() && "Missing variable");
+    if (!FuncInfo.MF->getMMI().hasDebugInfo()) {
       DEBUG(dbgs() << "Dropping debug info for " << *DI << "\n");
       return true;
     }

diff --git a/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp b/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
index bb40326ba2d16308178755602ff925599b33feaa..b788232995594ce587ca1aeff141dc8126f92e47 100644 (file)
--- a/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
+++ b/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
@@ -202,8 +202,9 @@ void FunctionLoweringInfo::set(const Function &fn, MachineFunction &mf,
       // during the initial isel pass through the IR so that it is done
       // in a predictable order.
       if (const DbgDeclareInst *DI = dyn_cast<DbgDeclareInst>(I)) {
-        DIVariable DIVar = DI->getVariable();
-        if (MMI.hasDebugInfo() && DIVar && DI->getDebugLoc()) {
+        assert(DI->getVariable() && "Missing variable");
+        assert(DI->getDebugLoc() && "Missing location");
+        if (MMI.hasDebugInfo()) {
           // Don't handle byval struct arguments or VLAs, for example.
           // Non-byval arguments are handled here (they refer to the stack
           // temporary alloca at this point).

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 32d2aae488e56a7dcc9250b974149b8dac0a3ad3..49ea4b4b5a363335329050b7a6c8e5f998d356ad 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4650,8 +4650,8 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
     MDLocalVariable *Variable = DI.getVariable();
     MDExpression *Expression = DI.getExpression();
     const Value *Address = DI.getAddress();
-    DIVariable DIVar = Variable;
-    if (!Address || !DIVar) {
+    assert(Variable && "Missing variable");
+    if (!Address) {
       DEBUG(dbgs() << "Dropping debug info for " << DI << "\n");
       return nullptr;
     }
@@ -4728,9 +4728,7 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
   }
   case Intrinsic::dbg_value: {
     const DbgValueInst &DI = cast<DbgValueInst>(I);
-    DIVariable DIVar = DI.getVariable();
-    if (!DIVar)
-      return nullptr;
+    assert(DI.getVariable() && "Missing variable");
 
     MDLocalVariable *Variable = DI.getVariable();
     MDExpression *Expression = DI.getExpression();

diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp
index 1c9760e0ff90c73dbe5d6e074238d63217986365..5672a36a45838a665e702c81f359f65b0b02db63 100644 (file)
--- a/lib/Transforms/Utils/Local.cpp
+++ b/lib/Transforms/Utils/Local.cpp
@@ -1000,8 +1000,7 @@ bool llvm::ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
                                            StoreInst *SI, DIBuilder &Builder) {
   DIVariable DIVar = DDI->getVariable();
   DIExpression DIExpr = DDI->getExpression();
-  if (!DIVar)
-    return false;
+  assert(DIVar && "Missing variable");
 
   if (LdStHasDebugValue(DIVar, SI))
     return true;
@@ -1028,8 +1027,7 @@ bool llvm::ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
                                            LoadInst *LI, DIBuilder &Builder) {
   DIVariable DIVar = DDI->getVariable();
   DIExpression DIExpr = DDI->getExpression();
-  if (!DIVar)
-    return false;
+  assert(DIVar && "Missing variable");
 
   if (LdStHasDebugValue(DIVar, LI))
     return true;
@@ -1107,8 +1105,7 @@ bool llvm::replaceDbgDeclareForAlloca(AllocaInst *AI, Value *NewAllocaAddress,
   DebugLoc Loc = DDI->getDebugLoc();
   DIVariable DIVar = DDI->getVariable();
   DIExpression DIExpr = DDI->getExpression();
-  if (!DIVar)
-    return false;
+  assert(DIVar && "Missing variable");
 
   if (Deref) {
     // Create a copy of the original DIDescriptor for user variable, prepending