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| author | Chris Lattner <sabre@nondot.org> | 2005-10-17 01:40:33 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-10-17 01:40:33 +0000 |
| commit | df921f070976e72563af475fae8c26ccd394908d (patch) | |
| tree | 5d19127fa0c033a2f6c61aeb440e3cf871e207ae /docs/CodeGenerator.html | |
| parent | f623a0844110f3d753296ec61f683349f05058ac (diff) | |
Document -view-isel-dags and -view-sched-dags
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23766 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/CodeGenerator.html')
| -rw-r--r-- | docs/CodeGenerator.html | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/CodeGenerator.html b/docs/CodeGenerator.html index bc99fb2492..7bbc7602a8 100644 --- a/docs/CodeGenerator.html +++ b/docs/CodeGenerator.html @@ -828,6 +828,15 @@ SelectionDAG-based instruction selection consists of the following steps: <p>After all of these steps are complete, the SelectionDAG is destroyed and the rest of the code generation passes are run.</p> +<p>One great way to visualize what is going on here is to take advantage of a +few LLC command line options. In particular, the <tt>-view-isel-dags</tt> +option pops up a window with the SelectionDAG input to the Select phase for all +of the code compiled (if you only get errors printed to the console while using +this, you probably <a href="ProgrammersManual.html#ViewGraph">need to configure +your system</a> to add support for it). The <tt>-view-sched-dags</tt> option +views the SelectionDAG output from the Select phase and input to the Scheduler +phase. +</p> </div> <!-- _______________________________________________________________________ --> |