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Jules Villard 55586b581b [preanalysis] do not delay killing variables taken by reference ... Summary: Before, the liveness pre-analysis would place extra instructions in the CFG for either: 1. marking an `Ident.t` as dead, or 2. marking a `Pvar.t` as `= 0` But we have no way of marking pvars dead without setting them to 0. This is bad because setting pvars to 0 is not possible everywhere they are dead. Indeed, we only do it when we haven't seen their address being taken anyway. This prevents the following situation, recorded in our tests: ``` int address_taken() { int** x; int* y; int i = 7; y = &i; x = &y; // if we don't reason about taken addresses while adding nullify instructions, // we'll add // `nullify(y)` here and report a false NPE on the next line return **x; } ``` So we want to mark pvars as dead without nullifying them. This diff extends the `Remove_temps` SIL instruction to accept pvars as well, and so renames it to `ExitScope`. Reviewed By: da319 Differential Revision: D13102953 fbshipit-source-id: aa7f03a52		6 years ago
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clang	[ocamlformat] upgrade to ocamlformat 0.7	7 years ago
clang_stubs	Change license to MIT	7 years ago
BoundedCallTreeTests.ml	[infer][scheduler] simplify the callbacks API	7 years ago
DifferentialFiltersTests.ml	[Perf] Perform comparisons of costs-reports by using costs-report.json files	7 years ago
DifferentialTests.ml	[Perf] Add hash to costs report	7 years ago
DifferentialTestsUtils.ml	[Perf] Add hash to costs report	7 years ago
FileDiffTests.ml	[ocamlformat] upgrade to ocamlformat 0.7	7 years ago
IListTests.ml	Fix IList.inter	7 years ago
JavaProfilerSamplesTest.ml	[ocamlformat] upgrade to ocamlformat 0.7	7 years ago
PerfProfilerATDParserTest.ml	Load data from performance profiler	6 years ago
SeverityTests.ml	QuandaryBO	7 years ago
TaintTests.ml	[quandary] Allow sinks to have multiple taints	6 years ago
TraceTests.ml	[ocamlformat] upgrade to ocamlformat 0.7	7 years ago
abstractInterpreterTests.ml	[AI] kill astate type	6 years ago
accessPathTestUtils.ml	[ocamlformat] upgrade to ocamlformat 0.7	7 years ago
accessPathTestUtils.mli	Change license to MIT	7 years ago
accessPathTests.ml	Change license to MIT	7 years ago
accessTreeTests.ml	[ocamlformat] upgrade to ocamlformat 0.7	7 years ago
addressTakenTests.ml	Change license to MIT	7 years ago
analyzerTester.ml	[debug] print full types in instructions on error	6 years ago
inferunit.ml	Weak Topological Order and Abstract Interpreter using it	6 years ago
inferunit.mli	Change license to MIT	7 years ago
livenessTests.ml	Change license to MIT	7 years ago
procCfgTests.ml	[preanalysis] do not delay killing variables taken by reference	6 years ago
schedulerTests.ml	Expose WTO in ProcCfg	6 years ago
stacktraceTests.ml	Change license to MIT	7 years ago
weakTopologicalOrderTests.ml	Expose WTO in ProcCfg	6 years ago