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769f3ebc15
In general ValueHandleBase::ValueIsRAUWd shouldn't be called when not all uses of the value were actually replaced, though, currently formLCSSAForInstructions calls it when it inserts LCSSA-phis. Calls of ValueHandleBase::ValueIsRAUWd were added to LCSSA specifically to update/invalidate SCEV. In the best case these calls duplicate some of the work already done by SE->forgetValue, though in case when SCEV of the value is SCEVUnknown, SCEV replaces the underlying value of SCEVUnknown with the new value (i.e. acts like LCSSA-phi actually fully replaces the value it is created for), which leads to SCEV being corrupted because LCSSA-phi rarely dominates all uses of its inputs. Fixes bug https://bugs.llvm.org/show_bug.cgi?id=44058. Reviewers: fhahn, efriedma, reames, sanjoy.google Reviewed By: fhahn Subscribers: hiraditya, javed.absar, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D70593 |
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| AggressiveInstCombine | ||
| CFGuard | ||
| Coroutines | ||
| Hello | ||
| InstCombine | ||
| Instrumentation | ||
| IPO | ||
| ObjCARC | ||
| Scalar | ||
| Utils | ||
| Vectorize | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||