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[Debugify][Original DI] Test dbg var loc preservation
This is an improvement of [0]. This adds checking of
original llvm.dbg.values()/declares() instructions in
optimizations.
We have picked a real issue that has been found with
this (actually, picked one variable location missing
from [1] and resolved the issue), and the result is
the fix for that -- D100844.
Before applying the D100844, using the options from [0]
(but with this patch applied) on the compilation of GDB 7.11,
the final HTML report for the debug-info issues can be found
at [1] (please scroll down, and look for
"Summary of Variable Location Bugs"). After applying
the D100844, the numbers has improved a bit -- please take
a look into [2].
[0] https://llvm.org/docs/HowToUpdateDebugInfo.html#\
test-original-debug-info-preservation-in-optimizations
[1] https://djolertrk.github.io/di-check-before-adce-fix/
[2] https://djolertrk.github.io/di-check-after-adce-fix/
Differential Revision: https://reviews.llvm.org/D100845
The Unit test was failing because the pass from the test that
modifies the IR, in its runOnFunction() didn't return 'true',
so the expensive-check configuration triggered an assertion.
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| .. | ||
| ASanStackFrameLayoutTest.cpp | ||
| BasicBlockUtilsTest.cpp | ||
| CallPromotionUtilsTest.cpp | ||
| CloningTest.cpp | ||
| CMakeLists.txt | ||
| CodeExtractorTest.cpp | ||
| CodeMoverUtilsTest.cpp | ||
| DebugifyTest.cpp | ||
| FunctionComparatorTest.cpp | ||
| IntegerDivisionTest.cpp | ||
| LocalTest.cpp | ||
| LoopRotationUtilsTest.cpp | ||
| LoopUtilsTest.cpp | ||
| ModuleUtilsTest.cpp | ||
| ScalarEvolutionExpanderTest.cpp | ||
| SizeOptsTest.cpp | ||
| SSAUpdaterBulkTest.cpp | ||
| UnrollLoopTest.cpp | ||
| ValueMapperTest.cpp | ||
| VFABIUtils.cpp | ||