18f67e669f
Uncomment unfinished work bailout in IdempotentOperationsChecker.
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llvm-svn: 109893
2010-07-30 21:14:15 +00:00
76bdd685c2
Extracted out some useful common functions in IdempotentOperationChecker to their own CheckerHelpers file.
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llvm-svn: 109560
2010-07-27 23:26:07 +00:00
83b598c14f
Finesse 'idempotent operations' analyzer issues to include the opcode of the binary operator for clearer error reporting. Also remove the 'Idempotent operation' prefix in messages; it's redundant since the bug type is the same.
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llvm-svn: 109527
2010-07-27 18:49:08 +00:00
e5cc6a858a
Put 'Idempotent operations' static analyzer issues in the 'Dead code' category.
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llvm-svn: 109517
2010-07-27 17:52:52 +00:00
8b9fd890e3
Fix APFloat assertion failure in IdempotentOperationChecker resulting in having
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an APFloat with different "float semantics" than the compared float literal.
llvm-svn: 108590
2010-07-17 00:40:32 +00:00
826e6b4023
Improved false positive rate for the idempotent operations checker and moved it into the default path-sensitive analysis options.
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- Added checks for static local variables, self assigned parameters, and truncating/extending self assignments
- Removed command line option (now default with --analyze)
- Updated test cases to pass with idempotent operation warnings
llvm-svn: 108550
2010-07-16 20:41:41 +00:00
ca1f871ff8
Change explicit handling of impossible condition to call llvm_unreachable in IdempotentOperationChecker::PreVisitBinaryOperator.
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llvm-svn: 107748
2010-07-07 01:27:17 +00:00
509a9ce9da
Silence an annoying GCC warning about use of an uninitialized variable. Even
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making the other switch case unreachable, or sinking the 'continue' into it
doesn't silence this.
llvm-svn: 107745
2010-07-07 00:36:56 +00:00
dce439d11d
Use 'llvm_unreachable' to mark impossible code paths so that GCC doesn't
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consider them for warnings.
llvm-svn: 107741
2010-07-07 00:07:37 +00:00
3ff08a8e76
Added a path-sensitive idempotent operation checker (-analyzer-idempotent-operation). Finds idempotent and/or tautological operations in a path sensitive context, flagging operations that have no effect or a predictable effect.
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Example:
{
int a = 1;
int b = 5;
int c = b / a; // a is 1 on all paths
}
- New IdempotentOperationChecker class
- Moved recursive Stmt functions in r107675 to IdempotentOperationChecker
- Minor refactoring of SVal to allow checking for any integer
- Added command line option for check
- Added basic test cases
llvm-svn: 107706
2010-07-06 21:43:29 +00:00
Tom Care