Simplify the input/output finder. All elements of a basic block are
instructions. Any used arguments are also inputs. An instruction can only
be used by another instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12405 91177308-0d34-0410-b5e6-96231b3b80d8
extracted, and a function that contained a single top-level loop never had
the loop extracted, regardless of how much non-loop code there was.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12403 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't insert a branch to the switch instruction after the call, just
make it a single block.
* Insert the new alloca instructions in the entry block of the original
function instead of having them execute dynamically
* Don't make the default edge of the switch instruction go back to the switch.
The loop extractor shouldn't create new loops!
* Give meaningful names to the alloca slots and the reload instructions
* Some minor code simplifications
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12402 91177308-0d34-0410-b5e6-96231b3b80d8
This also implements a two minor improvements:
* Don't insert live-out stores IN the region, insert them on the code path
that exits the region
* If the region is exited to the same block from multiple paths, share the
switch statement entry, live-out store code, and the basic block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12401 91177308-0d34-0410-b5e6-96231b3b80d8
a member of the class. While we're at it, turn the collection into a set
instead of a vector to improve efficiency and make queries simpler.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12400 91177308-0d34-0410-b5e6-96231b3b80d8
miscompiled, try to use the loop extractor to reduce the program down to a
loop nest that is being miscompiled. In practice, the loop extractor appears
to have too many bugs for this to be useful, but hopefully they will be fixed
soon...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12398 91177308-0d34-0410-b5e6-96231b3b80d8
* Make several methods of bugdriver global functions (ParseInputFile, PrintFunctionList)
* Make PrintFunctionList truncate the output after 10 entries, like the crash debugger
did. This allows code sharing.
* Add a couple of methods to BugDriver that allows us to eliminate some friends
* Improve comments in ExtractFunction.cpp
* Make classes that used to be friends up bugdriver now live in anon namespaces
* Rip a bunch of functionality in the miscompilation tester into a new
TestMergedProgram function for future code sharing.
* Fix a bug in the miscompilation tester induced in my last checkin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12393 91177308-0d34-0410-b5e6-96231b3b80d8
code duplication. Also, don't use ReduceMiscompilingFunctions::TestFuncs
to print out the final message.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12387 91177308-0d34-0410-b5e6-96231b3b80d8
Require 'simplified' loops, not just raw natural loops. This fixes
CodeExtractor/2004-03-13-LoopExtractorCrash.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12381 91177308-0d34-0410-b5e6-96231b3b80d8
loop information won't see it, and we could have unreachable blocks pointing to
the non-header node of blocks in a natural loop. This isn't tidy, so have the
loopsimplify pass clean it up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12380 91177308-0d34-0410-b5e6-96231b3b80d8
Fix InstCombine/2004-03-13-InstCombineInfLoop.ll which caused an infinite
loop compiling (I think) povray.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12365 91177308-0d34-0410-b5e6-96231b3b80d8
* Be a lot more accurate about what the effects will be when inlining a call
to a function when an argument is an alloca.
* Dramatically reduce the penalty for inlining a call in a large function.
This heuristic made it almost impossible to inline a function into a large
function, no matter how small the callee is.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12363 91177308-0d34-0410-b5e6-96231b3b80d8
On the testcase from GCC PR12440, which has a LOT of loops (1392 of which require
preheaders to be inserted), this speeds up the loopsimplify pass from 1.931s to
0.1875s. The loop in question goes from 1.65s -> 0.0097s, which isn't bad. All of
these times are a debug build.
This adds a dependency on DominatorTree analysis that was not there before, but
we always had dominatortree available anyway, because LICM requires both loop
simplify and DT, so this doesn't add any extra analysis in practice.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12362 91177308-0d34-0410-b5e6-96231b3b80d8
