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path: root/lib/Module/IntrinsicCleaner.cpp
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2016-10-18Fix `-Wmisleading-indentation` warning and also correctly set theDan Liew
`dirty` flag if we remove `llvm.trap` from the module.
2015-12-19Implement support for lowering the ``llvm.objectsize`` intrinsicDan Liew
introduced in LLVM 2.7. Previously KLEE would emit the following error message when ``IntrinsicLowering::LowerIntrinsicCall()`` was called on the intrinsic ``` LLVM ERROR: Code generator does not support intrinsic function 'llvm.objectsize.i64.p0i8'! ``` The ``IntrinsicCleaner`` pass now lowers this intrinsic to a constant integer depending on the second argument to the intrinsic. This corresponds to the case where the size of the object pointed to by the first argument is unknown. An alternative design would be to handle this intrinsic in the Executor where is actually possible to know the size of objects during execution. However that would be much more complicated because if the pointer is symbolic we would have to fork for every object that could be pointed to. The implementation is similar to #260 but we handle the second argument to the intrinsic correctly and also have a simple test case. Unfortunately we have to have a different version of the test case for LLVM 2.9 because the expected suffix for the intrinsic is different in LLVM 2.9.
2015-02-13refactor integer overflow detection, add signed intLuca Dariz
Instead of checking for every possible casse which result in overflow, it is much simpler to perform the operation using integers with bigger dimension and check if the result overflow
2015-02-13Fix overflow detection in unsigned multiplicationLuca Dariz
Previously the check was done as unsigned int a, b, c; c = a * b; if (c < a) // error but it is wrong, since it catches only a subset of all the possible overflows. This patch improves the check as unsigned int a, b, c; if ((a > 1) && (b > 1){ if ((UINT_MAX/a) < b) // error } An additional case has been added to the tests, with two 32-bit values that cause overflow and are not detected by the old check. It is also necessary to break the lowering procedure in case the current BasicBlock is splitted; in this case it was necessary in order not to trigger the division by 0 error.
2015-02-13Detect overflow of unsigned add, sub and mul operationsLuca Dariz
This requires clang with -fsanitize=unsigned-integer-overflow tested with clang and llvm 3.4.2
2015-02-13Revert "Merged @luckyluke's change for detecting overflow of unsigned add, sub"Cristian Cadar
Will redo the merge to preserve original commits. This reverts commit a743d7072d9ccf11f96e3df45f25ad07da6ad9d6.
2015-02-10Merged @luckyluke's change for detecting overflow of unsigned add, subCristian Cadar
and mul operations. Refactored tests into two main cases, and disabled them on LLVM 2.9, which does not support -fsanitized=*signed-integer-overflow.
2013-12-06Deprecate LLVM 2.8 and lowerMartin Nowack
2013-10-08Remove llvm.trap declaration after cleaning all uses.Lei Zhang
2013-09-23Lower intrinsic instruction "llvm.trap" to a call of the abort() function.Lei Zhang
2013-08-27Port to LLVM 3.3Martin Nowack
Major changes are: - Switching to llvm-link to build archive files - Use GetMallocUsage instead of GetTotalMemoryUsage (be aware of bug in LLVM 3.3 http://llvm.org/bugs/show_bug.cgi?id=16847) - intrinsic library functions like memcpy/mov/set use weak linkage to be replaced by e.g. uclibc functions - rewrote linking with library - enhanced MemoryLimit test case to check if mallocs were successful
2013-08-15Implemented llvm.umul.with.overflowMartin Nowack
2013-04-04Patch by Michael Contreras and Jiri Slaby for compiling KLEE with LLVM 3.2Cristian Cadar
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@178759 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-08Make the changes in r165394 be conditional on post LLVM 3.1 changes.Micah Villmow
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@165405 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-08Move TargetData to DataLayout.Micah Villmow
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@165394 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-10Lowering support for the llvm.uadd.with.overflow intrinsic.Peter Collingbourne
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@154367 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-20Deprecate LLVM_VERSION_MAJOR and LLVM_VERSION_MINOR in favour ofPeter Collingbourne
version codes. This makes the preprocessor-based version tests more concise and less error prone. Also, fix the version tests in lib/Expr/Parser.cpp (immutable zext and trunc were introduced in LLVM 2.9); now 2.9 passes "make test". git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@135583 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15Update to match new 2.8 CallInst getOperand API.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@108406 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24Remove llvm.dbg.value intrinsic new to LLVM 2.7Peter Collingbourne
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@106802 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-02Add missing include of Config.h, which was causing LLVM version checks to beDaniel Dunbar
broken, and thus we were removing all dbg.stoppoint instructions from modules. This totally broke debug info with 2.6. git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@102873 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-14Update for 2.7.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@98467 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17Update for LLVM API change.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@79217 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-01Implement va_arg handling for x86_64.Daniel Dunbar
- Based on a patch by Vladimir Kuznetsov! - x86_64 has a complicated calling convention for va_args; instead of dealing with this, this patch uses a clever workaround by initializing the va_list structure so that the callee believes all arguments were passed in the stack save area. git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@77819 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-21Initial KLEE checkin.Daniel Dunbar
- Lots more tweaks, documentation, and web page content is needed, but this should compile & work on OS X & Linux. git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@72205 91177308-0d34-0410-b5e6-96231b3b80d8
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