llvm/test/Transforms/LoopStrengthReduce, branch release_31

Merging r155809:

2012-04-30T17:12:42Z

------------------------------------------------------------------------ r155809 | rafael | 2012-04-29 20:53:06 -0700 (Sun, 29 Apr 2012) | 2 lines Make sure HoistInsertPosition finds a position that is dominated by all inputs. ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_31@155828 91177308-0d34-0410-b5e6-96231b3b80d8

Flip the new block-placement pass to be on by default.

2012-04-16T13:49:17Z

This is mostly to test the waters. I'd like to get results from FNT build bots and other bots running on non-x86 platforms. This feature has been pretty heavily tested over the last few months by me, and it fixes several of the execution time regressions caused by the inlining work by preventing inlining decisions from radically impacting block layout. I've seen very large improvements in yacr2 and ackermann benchmarks, along with the expected noise across all of the benchmark suite whenever code layout changes. I've analyzed all of the regressions and fixed them, or found them to be impossible to fix. See my email to llvmdev for more details. I'd like for this to be in 3.1 as it complements the inliner changes, but if any failures are showing up or anyone has concerns, it is just a flag flip and so can be easily turned off. I'm switching it on tonight to try and get at least one run through various folks' performance suites in case SPEC or something else has serious issues with it. I'll watch bots and revert if anything shows up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154816 91177308-0d34-0410-b5e6-96231b3b80d8

Unit test for PR11950: LSR crash.

2012-03-26T21:45:37Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153472 91177308-0d34-0410-b5e6-96231b3b80d8

Continue cleanup of LIT, getting rid of the remaining artifacts from dejagnu

2012-03-25T09:02:19Z

* Removed test/lib/llvm.exp - it is no longer needed * Deleted the dg.exp reading code from test/lit.cfg. There are no dg.exp files left in the test suite so this code is no longer required. test/lit.cfg is now much shorter and clearer * Removed a lot of duplicate code in lit.local.cfg files that need access to the root configuration, by adding a "root" attribute to the TestingConfig object. This attribute is dynamically computed to provide the same information as was previously provided by the custom getRoot functions. * Documented the config.root attribute in docs/CommandGuide/lit.pod git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153408 91177308-0d34-0410-b5e6-96231b3b80d8

Convert -indvars tests that rely on SCEV expansion to -loop-reduce tests.

2012-03-22T17:10:07Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153259 91177308-0d34-0410-b5e6-96231b3b80d8

LSR: teach isSimplifiedLoopNest to handle PHI IVUsers.

2012-03-20T21:24:44Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153132 91177308-0d34-0410-b5e6-96231b3b80d8

LSR: fix IVUsers isSimplifiedLoopNest to perform a full domtree walk

2012-03-20T21:24:40Z

instead of skipping the current loop. My prior fix was incomplete because of an overzealous compile-time optimization: Better fix for: Segmentation fault: 11 in LoopStrengthReduce git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153131 91177308-0d34-0410-b5e6-96231b3b80d8

LSR fix: Add isSimplifiedLoopNest to IVUsers analysis.

2012-03-16T03:16:56Z

Only record IVUsers that are dominated by simplified loop headers. Otherwise SCEVExpander will crash while looking for a preheader. I previously tried to work around this in LSR itself, but that was insufficient. This way, LSR can continue to run if some uses are not in simple loops, as long as we don't attempt to analyze those users. Fixes Segmentation fault: 11 in LoopStrengthReduce git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152892 91177308-0d34-0410-b5e6-96231b3b80d8

Move llc + target triple tests into X86

2012-03-10T19:03:51Z

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152502 91177308-0d34-0410-b5e6-96231b3b80d8

Fix this assert. IP can point to an instruction with strange dominance

2012-02-27T02:13:03Z

properties (invoke). Just assert that the instruction we return dominates the insertion point. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151511 91177308-0d34-0410-b5e6-96231b3b80d8