зеркало из https://github.com/microsoft/clang-1.git
Fixed bug in CFG construction where we failed to handle loop bodies with
no statements (or just full of ';' statements). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41620 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Родитель
16e4dc8073
Коммит
af603f7424
27
AST/CFG.cpp
27
AST/CFG.cpp
|
@ -213,7 +213,7 @@ void CFGBuilder::FinishBlock(CFGBlock* B) {
|
|||
/// of the created blocks, or the original value of "Block" when this method
|
||||
/// was called if no additional blocks are created.
|
||||
CFGBlock* CFGBuilder::addStmt(Stmt* S) {
|
||||
assert (Block);
|
||||
if (!Block) Block = createBlock();
|
||||
return WalkAST(S,true);
|
||||
}
|
||||
|
||||
|
@ -555,8 +555,8 @@ CFGBlock* CFGBuilder::VisitForStmt(ForStmt* F) {
|
|||
// All breaks should go to the code following the loop.
|
||||
BreakTargetBlock = LoopSuccessor;
|
||||
|
||||
// Create a new block to contain the (bottom) of the loop body.
|
||||
Block = createBlock();
|
||||
// Create a new block to contain the (bottom) of the loop body.
|
||||
Block = NULL;
|
||||
|
||||
// If we have increment code, insert it at the end of the body block.
|
||||
if (Stmt* I = F->getInc()) Block = addStmt(I);
|
||||
|
@ -564,8 +564,11 @@ CFGBlock* CFGBuilder::VisitForStmt(ForStmt* F) {
|
|||
// Now populate the body block, and in the process create new blocks
|
||||
// as we walk the body of the loop.
|
||||
CFGBlock* BodyBlock = Visit(F->getBody());
|
||||
assert (BodyBlock);
|
||||
if (Block) FinishBlock(BodyBlock);
|
||||
|
||||
if (!BodyBlock)
|
||||
BodyBlock = ExitConditionBlock; // can happen for "for (...;...; ) ;"
|
||||
else if (Block)
|
||||
FinishBlock(BodyBlock);
|
||||
|
||||
// This new body block is a successor to our "exit" condition block.
|
||||
ExitConditionBlock->addSuccessor(BodyBlock);
|
||||
|
@ -644,8 +647,11 @@ CFGBlock* CFGBuilder::VisitWhileStmt(WhileStmt* W) {
|
|||
|
||||
// Create the body. The returned block is the entry to the loop body.
|
||||
CFGBlock* BodyBlock = Visit(W->getBody());
|
||||
assert (BodyBlock);
|
||||
if (Block) FinishBlock(BodyBlock);
|
||||
|
||||
if (!BodyBlock)
|
||||
BodyBlock = ExitConditionBlock; // can happen for "while(...) ;"
|
||||
else if (Block)
|
||||
FinishBlock(BodyBlock);
|
||||
|
||||
// Add the loop body entry as a successor to the condition.
|
||||
ExitConditionBlock->addSuccessor(BodyBlock);
|
||||
|
@ -719,9 +725,12 @@ CFGBlock* CFGBuilder::VisitDoStmt(DoStmt* D) {
|
|||
|
||||
// Create the body. The returned block is the entry to the loop body.
|
||||
BodyBlock = Visit(D->getBody());
|
||||
assert (BodyBlock);
|
||||
if (Block) FinishBlock(BodyBlock);
|
||||
|
||||
if (!BodyBlock)
|
||||
BodyBlock = ExitConditionBlock; // can happen for "do ; while(...)"
|
||||
else if (Block)
|
||||
FinishBlock(BodyBlock);
|
||||
|
||||
// Add the loop body entry as a successor to the condition.
|
||||
ExitConditionBlock->addSuccessor(BodyBlock);
|
||||
}
|
||||
|
|
Загрузка…
Ссылка в новой задаче