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llvm-project/clang/test/Analysis/traversal-path-unification.c

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Reland 4: [analyzer] NFC: Update test infrastructure to support multiple constraint managers Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952. Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits Differential Revision: https://reviews.llvm.org/D30373 llvm-svn: 296895
2017-03-04 02:02:02 +08:00
// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.DumpTraversal %s | FileCheck %s
// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.DumpTraversal -DUSE_EXPR %s | FileCheck %s
Reapply "[analyzer] Remove constraints on dead symbols as part of removeDeadBindings." Previously, we'd just keep constraints around forever, which means we'd never be able to merge paths that differed only in constraints on dead symbols. Because we now allow constraints on symbolic expressions, not just single symbols, this requires changing SymExpr::symbol_iterator to include intermediate symbol nodes in its traversal, not just the SymbolData leaf nodes. This depends on the previous commit to be correct. Originally applied in r163444, reverted in r164275, now being re-applied. llvm-svn: 164622
2012-09-26 03:03:06 +08:00
int a();
int b();
int c();
[analyzer] Add tests for symbolic expression liveness. There are very few tests here because SValBuilder is fairly aggressive about not building SymExprs that we can't evaluate, which saves memory and CPU but also makes it very much tied to the current constraint manager. We should probably scale back here and let things decay to UnknownVal later on. bitwise-ops.c tests that for the SymExprs we do create, we persist our assumptions about them. traversal-path-unification.c tests that we do clean out constraints on arbitrary SymExprs once they have actually died. llvm-svn: 164623
2012-09-26 03:03:09 +08:00
#ifdef USE_EXPR
#define CHECK(x) ((x) & 1)
#else
#define CHECK(x) (x)
#endif
[analyzer] Add checker callback for beginning of function. Add a checker callback that is called when the analyzer starts analyzing a function either at the top level or when inlined. This will be used by a follow-on patch making the DeallocChecker path sensitive. Differential Revision: http://reviews.llvm.org/D17418 llvm-svn: 261293
2016-02-19 09:35:10 +08:00
// CHECK: --BEGIN FUNCTION--
Reapply "[analyzer] Remove constraints on dead symbols as part of removeDeadBindings." Previously, we'd just keep constraints around forever, which means we'd never be able to merge paths that differed only in constraints on dead symbols. Because we now allow constraints on symbolic expressions, not just single symbols, this requires changing SymExpr::symbol_iterator to include intermediate symbol nodes in its traversal, not just the SymbolData leaf nodes. This depends on the previous commit to be correct. Originally applied in r163444, reverted in r164275, now being re-applied. llvm-svn: 164622
2012-09-26 03:03:06 +08:00
void testRemoveDeadBindings() {
int i = a();
[analyzer] Add tests for symbolic expression liveness. There are very few tests here because SValBuilder is fairly aggressive about not building SymExprs that we can't evaluate, which saves memory and CPU but also makes it very much tied to the current constraint manager. We should probably scale back here and let things decay to UnknownVal later on. bitwise-ops.c tests that for the SymExprs we do create, we persist our assumptions about them. traversal-path-unification.c tests that we do clean out constraints on arbitrary SymExprs once they have actually died. llvm-svn: 164623
2012-09-26 03:03:09 +08:00
if (CHECK(i))
Reapply "[analyzer] Remove constraints on dead symbols as part of removeDeadBindings." Previously, we'd just keep constraints around forever, which means we'd never be able to merge paths that differed only in constraints on dead symbols. Because we now allow constraints on symbolic expressions, not just single symbols, this requires changing SymExpr::symbol_iterator to include intermediate symbol nodes in its traversal, not just the SymbolData leaf nodes. This depends on the previous commit to be correct. Originally applied in r163444, reverted in r164275, now being re-applied. llvm-svn: 164622
2012-09-26 03:03:06 +08:00
a();
else
b();
// At this point the symbol bound to 'i' is dead.
// The effects of a() and b() are identical (they both invalidate globals).
// We should unify the two paths here and only get one end-of-path node.
c();
}
[analyzer] Rename callback EndPath -> EndFunction This better reflects when callback is called and what the checkers are relying on. (Both names meant the same pre-IPA.) llvm-svn: 171432
2013-01-03 08:25:29 +08:00
// CHECK: --END FUNCTION--
// CHECK-NOT: --END FUNCTION--