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Diffstat (limited to 'llvm/docs/CodeGenerator.rst')
| -rw-r--r-- | llvm/docs/CodeGenerator.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/docs/CodeGenerator.rst b/llvm/docs/CodeGenerator.rst index 5736e4378d7..facedc32a4f 100644 --- a/llvm/docs/CodeGenerator.rst +++ b/llvm/docs/CodeGenerator.rst @@ -769,7 +769,9 @@ provide an ordering between nodes that have side effects (such as loads, stores, calls, returns, etc). All nodes that have side effects should take a token chain as input and produce a new one as output. By convention, token chain inputs are always operand #0, and chain results are always the last value -produced by an operation. +produced by an operation. However, after instruction selection, the +machine nodes have their chain after the instruction's operands, and +may be followed by glue nodes. A SelectionDAG has designated "Entry" and "Root" nodes. The Entry node is always a marker node with an Opcode of ``ISD::EntryToken``. The Root node is |
