llvm/test/Transforms/CodeGenPrepare, branch stable

Tests: rewrite 'opt ... %s' to 'opt ... < %s' so that opt does not emit a ModuleID

2012-12-30T01:28:40Z

This is done to avoid odd test failures, like the one fixed in r171243. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171246 91177308-0d34-0410-b5e6-96231b3b80d8

Move load_to_switch.ll to test/CodeGen/SPARC/

2012-09-19T09:25:03Z

Because the test invokes llc -march=sparc, it needs to be in a directory which is only run when the sparc target is built. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164211 91177308-0d34-0410-b5e6-96231b3b80d8

CodeGenPrep: turn lookup tables into switches for some targets.

2012-09-19T07:48:16Z

This is a follow-up from r163302, which added a transformation to SimplifyCFG that turns some switches into loads from lookup tables. It was pointed out that some targets, such as GPUs and deeply embedded targets, might not find this appropriate, but SimplifyCFG doesn't have enough information about the target to decide this. This patch adds the reverse transformation to CodeGenPrep: it turns loads from lookup tables back into switches for targets where we do not build jump tables (assuming these are also the targets where lookup tables are inappropriate). Hopefully we will eventually get to have target information in SimplifyCFG, and then this CodeGenPrep transformation can be removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164206 91177308-0d34-0410-b5e6-96231b3b80d8

During the CodeGenPrepare we often lower intrinsics (such as objsize)

2012-08-14T05:19:07Z

and allow some optimizations to turn conditional branches into unconditional. This commit adds a simple control-flow optimization which merges two consecutive basic blocks which are connected by a single edge. This allows the codegen to operate on larger basic blocks. rdar://11973998 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161852 91177308-0d34-0410-b5e6-96231b3b80d8

Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.

2012-02-16T06:28:33Z

Patch reviewed by Daniel Dunbar. It will be followed by additional cleanup patches. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150664 91177308-0d34-0410-b5e6-96231b3b80d8

Roll r127459 back in:

2011-03-11T21:52:04Z

Optimize trivial branches in CodeGenPrepare, which often get created from the lowering of objectsize intrinsics. Unfortunately, a number of tests were relying on llc not optimizing trivial branches, so I had to add an option to allow them to continue to test what they originally tested. This fixes and . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127498 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r127459, "Optimize trivial branches in CodeGenPrepare, which often get

2011-03-11T19:30:30Z

created from the", it broke some GCC test suite tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127477 91177308-0d34-0410-b5e6-96231b3b80d8

Optimize trivial branches in CodeGenPrepare, which often get created from the

2011-03-11T04:54:27Z

lowering of objectsize intrinsics. Unfortunately, a number of tests were relying on llc not optimizing trivial branches, so I had to add an option to allow them to continue to test what they originally tested. This fixes and . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127459 91177308-0d34-0410-b5e6-96231b3b80d8

temporarily revert r123526. While working on a follow-on patch I

2011-01-15T07:51:19Z

realize that ConstantFoldTerminator doesn't preserve dominfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123527 91177308-0d34-0410-b5e6-96231b3b80d8

fix rdar://8785296 - -fcatch-undefined-behavior generates inefficient code

2011-01-15T07:36:13Z

The basic issue is that isel (very reasonably!) expects conditional branches to be folded, so CGP leaving around a bunch dead computation feeding conditional branches isn't such a good idea. Just fold branches on constants into unconditional branches. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123526 91177308-0d34-0410-b5e6-96231b3b80d8