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Jia Chen a6757be036 Force emitting prune node for C++ comparison expressions ... Summary: This diff tries to achieve the followings: if we have the following C++ codes: ``` bool foo(int x, int y) { return &x == &y; } ``` We want the C++ frontend to emit Sil as if the input is written as ``` bool foo(int x, int y) { if (&x == &y) return 1; else return 0; } ``` This matches the behavior of our Java frontend. The reason why we prefer an explicit branch is that it will force the backend to eagerly produce two different specs for `foo`. Without the explicit branch, for the above example the backend would produce one spec with `return = (&x == &y)` as the post condition, which is not ideal because (1) we don't want local variables to escape to the function summary, and (2) with the knowledge that no two local variables may alias each other, the backend could actually determines that `&x == &y` is always false, emitting a more precise postcondition `return = 0`. This is not possible if we do not eagerly resolve the comparison expression. Reviewed By: akotulski Differential Revision: D5260745 fbshipit-source-id: 6bbbf99		8 years ago
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annotations	[make] print @ commands when passed VERBOSE=1	8 years ago
bin	[make] make infer/src/Makefile less phony	8 years ago
etc	[clang] replace yojson frontend with biniou frontend	9 years ago
lib	[report] restore "no issues found" output	8 years ago
models	Teach the frontend to recognize STL throw wrappers	8 years ago
src	Force emitting prune node for C++ comparison expressions	8 years ago
tests	Force emitting prune node for C++ comparison expressions	8 years ago
.merlin	Add unit folder to merlin	8 years ago
.ocp-indent	add ocp-indent configuration and eclipse launcher	9 years ago