From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- clang/test/Analysis/idempotent-operations.cpp | 34 +++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 clang/test/Analysis/idempotent-operations.cpp (limited to 'clang/test/Analysis/idempotent-operations.cpp') diff --git a/clang/test/Analysis/idempotent-operations.cpp b/clang/test/Analysis/idempotent-operations.cpp new file mode 100644 index 0000000..51b5905 --- /dev/null +++ b/clang/test/Analysis/idempotent-operations.cpp @@ -0,0 +1,34 @@ +// RUN: %clang_cc1 -analyze -analyzer-store=region -analyzer-constraints=range -fblocks -analyzer-opt-analyze-nested-blocks -analyzer-checker=experimental.deadcode.IdempotentOperations -verify %s + +// C++ specific false positives + +extern void test(int i); +extern void test_ref(int &i); + +// Test references affecting pseudoconstants +void false1() { + int a = 0; + int five = 5; + int &b = a; + test(five * a); // expected-warning {{The right operand to '*' is always 0}} + b = 4; +} + +// Test not flagging idempotent operations because we aborted the analysis +// of a path because of an unsupported construct. +struct RDar9219143_Foo { + ~RDar9219143_Foo(); + operator bool() const; +}; + +RDar9219143_Foo foo(); +unsigned RDar9219143_bar(); +void RDar9219143_test() { + unsigned i, e; + for (i = 0, e = RDar9219143_bar(); i != e; ++i) + if (foo()) + break; + if (i == e) // no-warning + return; +} + -- cgit v1.2.3