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llvm-6502/test/Transforms/SimplifyCFG
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Evan Cheng 4d09efd7b8 Speculatively execute a block when the the block is the then part of a triangle shape and it contains a single, side effect free, cheap instruction. The branch is eliminated by adding a select instruction. i.e. 
Turn                                                                                                                                                                                                       
BB:                                                                                                                                                                                                        
    %t1 = icmp                                                                                                                                                                                             
    br i1 %t1, label %BB1, label %BB2                                                                                                                                                                      
BB1:                                                                                                                                                                                                       
    %t3 = add %t2, c                                                                                                                                                                                       
    br label BB2                                                                                                                                                                                           
BB2:                                                                                                                                                                                                       
=>                                                                                                                                                                                                         
BB:                                                                                                                                                                                                        
    %t1 = icmp                                                                                                                                                                                             
    %t4 = add %t2, c                                                                                                                                                                                       
    %t3 = select i1 %t1, %t2, %t3


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52073 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-07 08:52:29 +00:00
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2002-05-05-EmptyBlockMerge.ll
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2002-05-21-PHIElimination.ll
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2002-06-24-PHINode.ll
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2002-09-24-PHIAssertion.ll
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2003-03-07-DominateProblem.ll
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2003-08-05-InvokeCrash.ll
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2003-08-05-MishandleInvoke.ll
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2003-08-17-BranchFold.ll
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2003-08-17-BranchFoldOrdering.ll
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2003-08-17-FoldSwitch.ll
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2004-12-10-SimplifyCFGCrash.ll
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2005-06-16-PHICrash.ll
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2005-08-01-PHIUpdateFail.ll
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2005-08-03-PHIFactorCrash.ll
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2005-10-02-InvokeSimplify.ll
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2005-12-03-IncorrectPHIFold.ll
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2006-02-17-InfiniteUnroll.ll
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2006-06-12-InfLoop.ll
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2006-08-03-Crash.ll
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2006-10-19-UncondDiv.ll
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2006-10-29-InvokeCrash.ll
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2006-12-08-Ptr-ICmp-Branch.ll
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2007-11-22-InvokeNoUnwind.ll
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2007-12-21-Crash.ll
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2008-01-02-hoist-fp-add.ll
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2008-04-23-MergeMultipleResultRet.ll
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2008-04-27-MultipleReturnCrash.ll
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2008-05-16-PHIBlockMerge.ll
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basictest.ll
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branch-cond-merge.ll
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branch-cond-prop.ll
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branch-fold-test.ll
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branch-fold.ll
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branch-phi-thread.ll
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BrUnwind.ll
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DeadSetCC.ll
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dg.exp
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EqualPHIEdgeBlockMerge.ll
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hoist-common-code.ll
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HoistCode.ll
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InvokeEliminate.ll
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iterative-simplify.ll
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noreturn-call.ll
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PhiBlockMerge2.ll
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PhiBlockMerge.ll
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PhiEliminate2.ll
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PhiEliminate.ll
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PhiNoEliminate.ll
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return-merge.ll
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SpeculativeExec.ll
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switch_create.ll
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switch_formation.ll
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switch_switch_fold.ll
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switch_thread.ll
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switch-simplify-crash.ll
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two-entry-phi-return.ll
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UncondBranchToReturn.ll
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UnreachableEliminate.ll
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