llvm-6502/lib/Transforms
Chandler Carruth f8c8a9cbb4 Teach the function cloner (and thus the inliner) to simplify PHINodes
aggressively. There are lots of dire warnings about this being expensive
that seem to predate switching to the TrackingVH-based value remapper
that is automatically updated on RAUW. This makes it easy to not just
prune single-entry PHIs, but to fully simplify PHIs, and to recursively
simplify the newly inlined code to propagate PHINode simplifications.

This introduces a bit of a thorny problem though. We may end up
simplifying a branch condition to a constant when we fold PHINodes, and
we would like to nuke any dead blocks resulting from this so that time
isn't wasted continually analyzing them, but this isn't easy. Deleting
basic blocks *after* they are fully cloned and mapped into the new
function currently requires manually updating the value map. The last
piece of the simplification-during-inlining puzzle will require either
switching to WeakVH mappings or some other piece of refactoring. I've
left a FIXME in the testcase about this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153410 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-25 10:34:54 +00:00
..
Hello Since the Hello pass is built as a loadable dynamic library, don't try to convert it to new-style registration yet. 2010-10-07 00:31:16 +00:00
InstCombine Revert r152907. 2012-03-16 18:20:54 +00:00
Instrumentation [asan] fix one more bug related to long double 2012-03-21 15:28:50 +00:00
IPO Move the instruction simplification of callsite arguments in the inliner 2012-03-25 04:03:40 +00:00
Scalar Refactor the interface to recursively simplifying instructions to be tad 2012-03-24 21:11:24 +00:00
Utils Teach the function cloner (and thus the inliner) to simplify PHINodes 2012-03-25 10:34:54 +00:00
Vectorize fix typos 2012-03-05 17:39:47 +00:00
CMakeLists.txt Add a basic-block autovectorization pass. 2012-02-01 03:51:43 +00:00
LLVMBuild.txt Add a basic-block autovectorization pass. 2012-02-01 03:51:43 +00:00
Makefile Add a basic-block autovectorization pass. 2012-02-01 03:51:43 +00:00