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Summary: This is a follow-up to r334830 and r335031. In the valueCoversEntireFragment check we now also handle the situation when there is a variable length array (VLA) involved, and the length of the array has been reduced to a constant. The ConvertDebugDeclareToDebugValue functions that are related to PHI nodes and load instructions now avoid inserting dbg.value intrinsics when the value does not, for certain, cover the variable/fragment that should be described. In r334830 we assumed that the value always covered the entire var/fragment and we had assertions in the code to show that assumption. However, those asserts failed when compiling code with VLAs, so we removed the asserts in r335031. Now when we know that the valueCoversEntireFragment check can fail also for PHI/Load instructions we avoid to insert the faulty dbg.value intrinsic in such situations. Compared to the Store instruction scenario we simply drop the dbg.value here (as the variable does not change its value due to PHI/Load, so an earlier dbg.value describing the variable should still be valid). Reviewers: aprantl, vsk, efriedma Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D48547 llvm-svn: 335580 |
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| .. | ||
| 2002-03-28-UninitializedVal.ll | ||
| 2002-05-01-ShouldNotPromoteThisAlloca.ll | ||
| 2003-04-10-DFNotFound.ll | ||
| 2003-04-18-DeadBlockProblem.ll | ||
| 2003-04-24-MultipleIdenticalSuccessors.ll | ||
| 2003-06-26-IterativePromote.ll | ||
| 2003-10-05-DeadPHIInsertion.ll | ||
| 2005-06-30-ReadBeforeWrite.ll | ||
| 2005-11-28-Crash.ll | ||
| 2007-08-27-VolatileLoadsStores.ll | ||
| atomic.ll | ||
| ConvertDebugInfo2.ll | ||
| ConvertDebugInfo.ll | ||
| crash.ll | ||
| dbg-addr-inline-dse.ll | ||
| dbg-addr.ll | ||
| dbg-inline-scope-for-phi.ll | ||
| debug-alloca-phi-2.ll | ||
| debug-alloca-phi.ll | ||
| debug-alloca-vla-1.ll | ||
| debug-alloca-vla-2.ll | ||
| ignore-lifetime.ll | ||
| optnone.ll | ||
| pr24179.ll | ||
| pr37632-unreachable-list-of-stores.ll | ||
| preserve-nonnull-load-metadata.ll | ||
| PromoteMemToRegister.ll | ||
| UndefValuesMerge.ll | ||