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# b0914e72 19-Oct-2019 Artem Dergachev <[email protected]>

[analyzer] Specify the C++ standard in more tests.

Makes life easier for downstream developers with different default standard.

llvm-svn: 375308
Revision tags: llvmorg-9.0.0, llvmorg-9.0.0-rc6, llvmorg-9.0.0-rc5, llvmorg-9.0.0-rc4, llvmorg-9.0.0-rc3, llvmorg-9.0.0-rc2, llvmorg-9.0.0-rc1, llvmorg-10-init, llvmorg-8.0.1, llvmorg-8.0.1-rc4
# 5e17ee1e 05-Jul-2019 Kristof Umann <[email protected]>

[analyzer][IDF] Add a control dependency calculator + a new debug checker

I intend to improve the analyzer's bug reports by tracking condition
expressions.

01 bool b = messyComputation();
02 int i

[analyzer][IDF] Add a control dependency calculator + a new debug checker

I intend to improve the analyzer's bug reports by tracking condition
expressions.

01 bool b = messyComputation();
02 int i = 0;
03 if (b) // control dependency of the bug site, let's explain why we assume val
04 // to be true
05 10 / i; // warn: division by zero

I'll detail this heuristic in the followup patch, strictly related to this one
however:

* Create the new ControlDependencyCalculator class that uses llvm::IDFCalculator
to (lazily) calculate control dependencies for Clang's CFG.
* A new debug checker debug.DumpControlDependencies is added for lit tests
* Add unittests

Differential Revision: https://reviews.llvm.org/D62619

llvm-svn: 365197

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# 71a9dc39 03-Jul-2019 Kristof Umann <[email protected]>

[analyzer][Dominator] Add post dominators to CFG + a new debug checker

Transform clang::DominatorTree to be able to also calculate post dominators.

* Tidy up the documentation
* Make it clang::Domi

[analyzer][Dominator] Add post dominators to CFG + a new debug checker

Transform clang::DominatorTree to be able to also calculate post dominators.

* Tidy up the documentation
* Make it clang::DominatorTree template class (similarly to how
llvm::DominatorTreeBase works), rename it to clang::CFGDominatorTreeImpl
* Clang's dominator tree is now called clang::CFGDomTree
* Clang's brand new post dominator tree is called clang::CFGPostDomTree
* Add a lot of asserts to the dump() function
* Create a new checker to test the functionality

Differential Revision: https://reviews.llvm.org/D62551

llvm-svn: 365028

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# 85211c08 03-Jul-2019 Kristof Umann <[email protected]>

[Dominators] PR42041: Skip nullpointer successors

https://bugs.llvm.org/show_bug.cgi?id=42041

In Clang's CFG, we use nullpointers to represent unreachable nodes, for
example, in the included testfi

[Dominators] PR42041: Skip nullpointer successors

https://bugs.llvm.org/show_bug.cgi?id=42041

In Clang's CFG, we use nullpointers to represent unreachable nodes, for
example, in the included testfile, block B0 is unreachable from block
B1, resulting in a nullpointer dereference somewhere in
llvm::DominatorTreeBase<clang::CFGBlock, false>::recalculate.

This patch fixes this issue by specializing
llvm::DomTreeBuilder::SemiNCAInfo::ChildrenGetter::Get for
clang::CFG to not contain nullpointer successors.

Differential Revision: https://reviews.llvm.org/D62507

llvm-svn: 365026

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