[llvm-bugs] [Bug 48689] Commit 21f7cf4057b7 causing huge regression in compile time

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Jan 8 10:55:21 PST 2021


Reid Kleckner <rnk at google.com> changed:

           What    |Removed                     |Added
         Resolution|FIXED                       |---
             Status|RESOLVED                    |REOPENED
                 CC|                            |rnk at google.com

--- Comment #5 from Reid Kleckner <rnk at google.com> ---
I don't think LLVM_DEBUG does what you want it to. I think you should consider

LLVM_DEBUG is defined here, conditional on NDEBUG, which is what controls
assertions, so LLVM_DEBUG will run in Release+Asserts builds:

If I'm reading it correctly, LLVM_DEBUG only runs when the `-debug` LLVM option
is set, and debug output from the relevant pass is enabled. This option is
almost never enabled in the regular test suite, so with LLVM_DEBUG, this
verification function is almost never called.

See also the bug I filed about verifyFunction being too slow:

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