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This is a bugfix in the transformation phase. If the original outer loop header branches to both the inner loop (header) and the outer loop latch, and if there is an lcssa PHI node outside the loop nest, then after interchange the new outer latch will have an lcssa PHI node inserted which has two predecessors, i.e., the original outer header and the original outer latch. Currently the transformation assumes it has only one predecessor (the original outer latch) and crashes, since the inserted lcssa PHI node does not take both predecessors as incoming BBs. Reviewed By: Whitney Differential Revision: https://reviews.llvm.org/D100792 |
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| .. | ||
| call-instructions.ll | ||
| currentLimitation.ll | ||
| debuginfo.ll | ||
| inner-indvar-depend-on-outer-indvar.ll | ||
| inner-only-reductions.ll | ||
| interchange-flow-dep-outer.ll | ||
| interchange-insts-between-indvar.ll | ||
| interchange-no-deps.ll | ||
| interchangeable.ll | ||
| interchanged-loop-nest-3.ll | ||
| lcssa-preheader.ll | ||
| lcssa.ll | ||
| loop-interchange-optimization-remarks.ll | ||
| not-interchanged-dependencies-1.ll | ||
| not-interchanged-loop-nest-3.ll | ||
| not-interchanged-tightly-nested.ll | ||
| outer-header-jump-to-inner-latch.ll | ||
| outer-only-reductions.ll | ||
| perserve-lcssa.ll | ||
| phi-ordering.ll | ||
| pr43176-move-to-new-latch.ll | ||
| pr43473-invalid-lcssa-phis-in-inner-exit.ll | ||
| pr43797-lcssa-for-multiple-outer-loop-blocks.ll | ||
| pr45743-move-from-inner-preheader.ll | ||
| profitability.ll | ||
| reductions-across-inner-and-outer-loop.ll | ||
| update-condbranch-duplicate-successors.ll | ||
| vector-gep-operand.ll | ||