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authorJosé Fonseca <jfonseca@vmware.com>2010-10-17 13:41:45 -0700
committerJosé Fonseca <jfonseca@vmware.com>2010-10-17 18:23:18 -0700
commit4dfb43c6a655574a9b59b552d05408c027d8cfaa (patch)
treeaab4daf94f44a17290a7c366dc851546d859447c /src
parent5b966f58e3d87fc271cc429be969cf98eec991ca (diff)
gallivm: Comment lp_build_insert_new_block().
Diffstat (limited to 'src')
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_flow.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_flow.c b/src/gallium/auxiliary/gallivm/lp_bld_flow.c
index f9d061fcb4..a2cee199a0 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_flow.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_flow.c
@@ -39,6 +39,14 @@
/**
+ * Insert a new block, right where builder is pointing to.
+ *
+ * This is useful important not only for aesthetic reasons, but also for
+ * performance reasons, as frequently run blocks should be laid out next to
+ * each other and fall-throughs maximized.
+ *
+ * See also llvm/lib/Transforms/Scalar/BasicBlockPlacement.cpp.
+ *
* Note: this function has no dependencies on the flow code and could
* be used elsewhere.
*/