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Author SHA1 Message Date
Artem Dergachev 85f7294e5a [analyzer] CastValueChecker: Correctly model results of based-to-derived casts. 
Our SVal hierarchy doesn't allow modeling pointer casts as no-op. The
pointer type is instead encoded into the pointer object. Defer to our
usual pointer casting facility, SValBuilder::evalBinOp().

Fixes a crash.

llvm-svn: 369729
 2019-08-23 03:24:04 +00:00
Artem Dergachev 62a76d0ae3 [analyzer] CastValueChecker: Provide DynamicTypeMap with pointer types only. 
The idea to drop this requirement is good, but for now every other user
of DynamicTypeInfo expects pointer types.

Fixes a crash.

llvm-svn: 369728
 2019-08-23 03:24:01 +00:00
Artem Dergachev af992e6d01 [analyzer] CastValueChecker: Avoid modeling casts between objects. 
Our method only works correctly when casting a pointer to a pointer
or a reference to a reference.

Fixes a crash.

llvm-svn: 369727
 2019-08-23 03:23:58 +00:00
Haojian Wu fcedc6a61b Remove an unused function, suppress -Wunused-function warning. 
llvm-svn: 369629
 2019-08-22 08:49:41 +00:00
Csaba Dabis 4d71600c11 [analyzer] CastValueChecker: Model isa(), isa_and_nonnull() 
Summary: -

Reviewed By: NoQ

Differential Revision: https://reviews.llvm.org/D66423

llvm-svn: 369615
 2019-08-22 02:57:59 +00:00
Csaba Dabis 22dc44ff89 [analyzer] CastValueChecker: Try to fix the buildbots 
llvm-svn: 369609
 2019-08-22 01:41:06 +00:00
Csaba Dabis 0202c3596c [analyzer] CastValueChecker: Store the dynamic types and casts 
Summary:
This patch introduces `DynamicCastInfo` similar to `DynamicTypeInfo` which
is stored in `CastSets` which are storing the dynamic cast informations of
objects based on memory regions. It could be used to store and check the
casts and prevent infeasible paths.

Reviewed By: NoQ

Differential Revision: https://reviews.llvm.org/D66325

llvm-svn: 369605
 2019-08-22 00:20:36 +00:00
Csaba Dabis cf229d5752 [analyzer] CastValueChecker: Model castAs(), getAs() 
Summary: Thanks to Kristóf Umann for the great idea!

Reviewed By: NoQ

Differential Revision: https://reviews.llvm.org/D65889

llvm-svn: 368383
 2019-08-09 02:24:42 +00:00
Csaba Dabis e856c0465d [analyzer] CastValueChecker: Remove a dump() 
Summary: Fix a nit.
llvm-svn: 365590
 2019-07-10 00:50:01 +00:00
Csaba Dabis 693936ab8f [analyzer] CastValueChecker: Model casts 
Summary:
It models the LLVM casts:
- `cast<>`
- `dyn_cast<>`
- `cast_or_null<>`
- `dyn_cast_or_null<>`

It has a very basic support without checking the `classof()` function.

(It reapplies the reverted 'llvm-svn: 365582' patch with proper test file.)

Reviewed By: NoQ

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64374

llvm-svn: 365585
 2019-07-10 00:20:03 +00:00
Csaba Dabis 6a29680efb Revert "[analyzer] CastValueChecker: Model casts" 
This reverts commit 27cf666443.

llvm-svn: 365584
 2019-07-09 23:47:09 +00:00
Csaba Dabis 27cf666443 [analyzer] CastValueChecker: Model casts 
Summary:
It models the LLVM casts:
- `cast<>`
- `dyn_cast<>`
- `cast_or_null<>`
- `dyn_cast_or_null<>`

It has a very basic support without checking the `classof()` function.

Reviewed By: NoQ

Tags: #clang

Differential Revision: https://reviews.llvm.org/D64374

llvm-svn: 365582
 2019-07-09 23:33:23 +00:00