[Lldb-commits] [PATCH] D91734: [FastISel] Flush local value map on every instruction

[Paul Robinson via Phabricator via lldb-commits]

probinson added a comment.

In D91734#2480930 <https://reviews.llvm.org/D91734#2480930>, @dblaikie wrote:

> I haven't looked closely, but I take it this one test modification seems reasonable to you? I guess we're stepping into some subexpressions on a function call that we previously didn't? (they didn't have any instructions attributed to them until now, but it's not unreasonable that they have them attributed - for materializing constants to pass to a function call when the function call/constants are split over multiple lines, etc)

Exactly.  In each case, the test is trying to "next" over a function call; gcc attributes all parameter evaluation to the function name, while clang will attribute each parameter to its own location.  And when the parameters span multiple source lines, the is_stmt heuristic kicks in, so we stop on each line with actual parameters.

This is not ideal IMO; I'd rather be more principled about (a) stop at every parameter, or (b) stop at no parameters.  But without reworking how we do is_stmt, I think fiddling the test to do enough single-steps to actually get past the function call is okay.


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https://reviews.llvm.org/D91734