Whitney Tsang 7242e653d2 [LoopFusion] Move instructions from FC1.GuardBlock to FC0.GuardBlock and ... from FC0.ExitBlock to FC1.ExitBlock when proven safe. Summary: Currently LoopFusion give up when the second loop nest guard block or the first loop nest exit block is not empty. For example: if (0 < N) { for (int i = 0; i < N; ++i) {} x+=1; } y+=1; if (0 < N) { for (int i = 0; i < N; ++i) {} } The above example should be safe to fuse. This PR moves instructions in FC1 guard block (e.g. y+=1;) to FC0 guard block, or instructions in FC0 exit block (e.g. x+=1;) to FC1 exit block, which then LoopFusion is able to fuse them. Reviewer: kbarton, jdoerfert, Meinersbur, dmgreen, fhahn, hfinkel, bmahjour, etiotto Reviewed By: jdoerfert Subscribers: hiraditya, llvm-commits Tag: LLVM Differential Revision: https://reviews.llvm.org/D73641		2020-01-30 18:02:22 +00:00
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cannot_fuse.ll
diagnostics_analysis.ll
diagnostics_missed.ll	[LoopFusion] Move instructions from FC1.GuardBlock to FC0.GuardBlock and	2020-01-30 18:02:22 +00:00
four_loops.ll
guarded.ll	[LoopFusion] Move instructions from FC1.GuardBlock to FC0.GuardBlock and	2020-01-30 18:02:22 +00:00
inner_loops.ll
loop_nest.ll
simple.ll