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* Revert "[analyzer] Toning down invalidation a bit".Artem Dergachev2019-04-031-4/+1
| | | | | | | | | | | | | | | This reverts commit r352473. The overall idea is great, but it seems to cause unintented consequences when not only Region Store invalidation but also pointer escape mechanism was accidentally affected. Based on discussions in https://reviews.llvm.org/D58121#1452483 and https://reviews.llvm.org/D57230#1434161 Differential Revision: https://reviews.llvm.org/D57230 llvm-svn: 357620
* [analyzer] Toning down invalidation a bitGabor Horvath2019-01-291-1/+4
| | | | | | | | | When a function takes the address of a field the analyzer will no longer assume that the function will change other fields of the enclosing structs. Differential Revision: https://reviews.llvm.org/D57230 llvm-svn: 352473
* [analyzer] Move analyzer-eagerly-assume to AnalyzerOptions, enable by defaultGeorge Karpenkov2018-08-291-1/+1
| | | | | | Differential Revision: https://reviews.llvm.org/D51251 llvm-svn: 340963
* Reland 4: [analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-03-031-1/+1
| | | | | | | | | | | | | | 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
* Revert "Reland 3: [analyzer] NFC: Update test infrastructure to support ↵Dominic Chen2017-03-021-1/+1
| | | | | | | | multiple constraint managers" This reverts commit ea36f1406e1f36bf456c3f3929839b024128e468. llvm-svn: 296841
* Reland 3: [analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-03-021-1/+1
| | | | | | | | | | | | | | 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: 296837
* Revert "Reland 2: [analyzer] NFC: Update test infrastructure to support ↵Dominic Chen2017-03-021-1/+1
| | | | | | | | multiple constraint managers" This reverts commit f93343c099fff646a2314cc7f4925833708298b1. llvm-svn: 296836
* Reland 2: [analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-03-021-1/+1
| | | | | | | | | | | | | | 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: 296835
* Revert "Reland: [analyzer] NFC: Update test infrastructure to support ↵Dominic Chen2017-02-281-1/+1
| | | | | | | | multiple constraint managers" This reverts commit 1b28d0b10e1c8feccb971abb6ef7a18bee589830. llvm-svn: 296422
* Reland: [analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-02-281-1/+1
| | | | | | | | | | | | | | 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: 296414
* Revert "[analyzer] NFC: Update test infrastructure to support multiple ↵Dominic Chen2017-02-271-1/+1
| | | | | | | | constraint managers" This reverts commit 8e7780b9e59ddaad1800baf533058d2c064d4787. llvm-svn: 296317
* [analyzer] NFC: Update test infrastructure to support multiple constraint ↵Dominic Chen2017-02-271-1/+1
| | | | | | | | | | | | | | 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: 296312
* [analyzer] Let TK_PreserveContents span across the whole base region.Artem Dergachev2016-04-251-0/+47
| | | | | | | | | | | | If an address of a field is passed through a const pointer, the whole structure's base region should receive the TK_PreserveContents trait and avoid invalidation. Additionally, include a few FIXME tests shown up during testing. Differential Revision: http://reviews.llvm.org/D19057 llvm-svn: 267413
* [analyzer] Functions marked __attribute__((const)) don't modify any memory.Jordan Rose2014-05-071-0/+29
| | | | | | | | | This applies to __attribute__((pure)) as well, but 'const' is more interesting because many of our builtins are marked 'const'. PR19661 llvm-svn: 208154
* [analyzer] Invalidate regions indirectly accessible through const pointers.Jordan Rose2013-03-201-0/+91
In this case, the value of 'x' may be changed after the call to indirectAccess: struct Wrapper { int *ptr; }; void indirectAccess(const Wrapper &w); void test() { int x = 42; Wrapper w = { x }; clang_analyzer_eval(x == 42); // TRUE indirectAccess(w); clang_analyzer_eval(x == 42); // UNKNOWN } This is important for modelling return-by-value objects in C++, to show that the contents of the struct are escaping in the return copy-constructor. <rdar://problem/13239826> llvm-svn: 177570
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