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mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-20 14:29:27 +00:00
Andrea Di Biagio 888cbad774 Fix edge condition in DAGCombiner to improve codegen of shift sequences.
When canonicalizing dags according to the rule
(shl (zext (shr X, c1) ), c1) ==> (zext (shl (shr X, c1), c1))

remember to add the new shl dag to the DAGCombiner worklist of nodes.
If we don't explicitly add it to the worklist of nodes to visit, we
may not trigger later on the rule that folds the shift left + logical
shift right into a AND instruction with bitmask.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192883 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-17 11:02:58 +00:00
2013-10-16 18:37:51 +00:00
2013-10-16 12:47:04 +00:00
2013-10-14 16:48:32 +00:00

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for the Low Level
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LLVM backend for 6502
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