Ted Kremenek 82f7f9c080 Introduce caching of diagnostics in BugReporter. This provides extra ... pruning of diagnostics that may be emitted multiple times. This is accomplished by adding FoldingSet profiling support to PathDiagnostic, and then having BugReporter record what diagnostics have been issued. This was motived to a serious bug introduced by moving the 'divide-by-zero' checking outside of GRExprEngine into a separate 'Checker' class. When analyzing code using the '-fobjc-gc' option, a given function would be analyzed twice, but the second time various "internal checks" would be disabled to avoid emitting multiple diagnostics (e.g., "null dereference") for the same issue. The problem is that such checks also effect path pruning and don't just emit diagnostics. This resulted in an assertion failure involving a real divide-by-zero in some analyzed code where we would get an assertion failure in APInt because the 'DivZero' check was disabled and didn't prune the logic that resulted in the divide-by-zero in the analyzer. The implemented solution is somewhat of a hack, and may not perform extremely well. This will need to be cleaned up over time. As a regression test, 'misc-ps.m' has been modified so that its tests are run using -fobjc-gc to test this diagnostic pruning behavior. llvm-svn: 82198		2009-09-18 05:37:41 +00:00
clang	Introduce caching of diagnostics in BugReporter. This provides extra	2009-09-18 05:37:41 +00:00
compiler-rt	update make rules so libcompiler-rt can be built for armv6 the Apple way	2009-09-18 00:09:05 +00:00
llvm	make this testcase check darwin32 also	2009-09-17 23:56:41 +00:00