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llvm-6502/test/Transforms/SimplifyCFG
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Chris Lattner 7312a22ed6 enhance the "change or icmp's into switch" xform to handle one value in an 
'or sequence' that it doesn't understand.  This allows us to optimize
something insane like this:

int crud (unsigned char c, unsigned x)
 {
   if(((((((((( (int) c <= 32 ||
                    (int) c == 46) || (int) c == 44)
                  || (int) c == 58) || (int) c == 59) || (int) c == 60)
               || (int) c == 62) || (int) c == 34) || (int) c == 92)
            || (int) c == 39) != 0)
     foo();
 }

into:

define i32 @crud(i8 zeroext %c, i32 %x) nounwind ssp noredzone {
entry:
  %cmp = icmp ult i8 %c, 33
  br i1 %cmp, label %if.then, label %switch.early.test

switch.early.test:                                ; preds = %entry
  switch i8 %c, label %if.end [
    i8 39, label %if.then
    i8 44, label %if.then
    i8 58, label %if.then
    i8 59, label %if.then
    i8 60, label %if.then
    i8 62, label %if.then
    i8 46, label %if.then
    i8 92, label %if.then
    i8 34, label %if.then
  ]

by pulling the < comparison out ahead of the newly formed switch.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121680 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-13 04:50:38 +00:00
..
2002-05-05-EmptyBlockMerge.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2002-05-21-PHIElimination.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2002-06-24-PHINode.ll fix a bunch of spurious failures for people whose home directory 2009-09-11 17:02:12 +00:00
2002-09-24-PHIAssertion.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2003-03-07-DominateProblem.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2003-08-05-InvokeCrash.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2003-08-05-MishandleInvoke.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2003-08-17-BranchFold.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2003-08-17-BranchFoldOrdering.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2003-08-17-FoldSwitch-dbg.ll Delete useless trailing semicolons. 2010-01-05 17:55:26 +00:00
2003-08-17-FoldSwitch.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2004-12-10-SimplifyCFGCrash.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2005-06-16-PHICrash.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2005-08-01-PHIUpdateFail.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2005-08-03-PHIFactorCrash.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2005-10-02-InvokeSimplify.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2005-12-03-IncorrectPHIFold.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2006-02-17-InfiniteUnroll.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2006-06-12-InfLoop.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2006-08-03-Crash.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2006-10-19-UncondDiv.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2006-10-29-InvokeCrash.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2006-12-08-Ptr-ICmp-Branch.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2007-11-22-InvokeNoUnwind.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2007-12-21-Crash.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-01-02-hoist-fp-add.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-04-23-MergeMultipleResultRet.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-04-27-MultipleReturnCrash.ll Correct bogus module triple specifications. 2010-08-30 10:48:29 +00:00
2008-05-16-PHIBlockMerge.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-07-13-InfLoopMiscompile.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-09-08-MultiplePred.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-09-17-SpeculativeHoist.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-10-03-SpeculativelyExecuteBeforePHI.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-12-06-SingleEntryPhi.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2008-12-16-DCECond.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2009-01-18-PHIPropCrash.ll Optimize test more. 2009-11-10 21:02:18 +00:00
2009-01-19-UnconditionalTrappingConstantExpr.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2009-03-05-Speculative-Hoist-Dbg.ll Delete useless trailing semicolons. 2010-01-05 17:55:26 +00:00
2009-05-12-externweak.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
2009-06-15-InvokeCrash.ll Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul, 2010-03-02 01:11:08 +00:00
2010-03-30-InvokeCrash.ll testcase for r99914, provided by baldrick! 2010-03-31 20:37:13 +00:00
2010-10-24-OnlyUnwindInEntry.ll Fix PR8445: a block with no predecessors may be the entry block, in which case 2010-10-24 12:23:30 +00:00
basictest.ll Teach SimplifyCFG how to simplify indirectbr instructions. 2010-08-14 00:29:42 +00:00
branch_fold_dbg.ll Delete useless trailing semicolons. 2010-01-05 17:55:26 +00:00
branch-branch-dbginfo.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
branch-cond-merge.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
branch-cond-prop.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
branch-fold-test.ll Use opt -S instead of piping bitcode output through llvm-dis. 2009-09-08 22:34:10 +00:00
branch-fold.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
branch-phi-thread.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
BrUnwind.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
dbginfo.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
DeadSetCC.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
dg.exp sabre brings to my attention that the 'tr' suffix is also obsolete 2008-05-20 21:00:03 +00:00
duplicate-phis.ll fix two bogus tests that the asmparser now rejects. 2009-12-30 05:54:51 +00:00
EqualPHIEdgeBlockMerge.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
hoist-common-code.dbg.ll Delete useless trailing semicolons. 2010-01-05 17:55:26 +00:00
hoist-common-code.ll fix a bunch of spurious failures for people whose home directory 2009-09-11 17:02:12 +00:00
HoistCode.ll fix a bunch of spurious failures for people whose home directory 2009-09-11 17:02:12 +00:00
indirectbr.ll Teach SimplifyCFG to turn 2010-12-05 18:29:03 +00:00
invoke_unwind.ll change simplifycfg to not duplicate 'unwind' instructions. Hopefully 2009-10-13 18:13:05 +00:00
iterative-simplify.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
MagicPointer.ll Teach SimplifyCFG about magic pointer constants. 2010-02-05 22:03:18 +00:00
noreturn-call.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
PhiBlockMerge2.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
PhiBlockMerge.ll Revert r85667. LoopUnroll currently can't call utility functions which 2009-10-31 17:33:01 +00:00
PhiEliminate2.ll fix a bunch of spurious failures for people whose home directory 2009-09-11 17:02:12 +00:00
PhiEliminate.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
PhiNoEliminate.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
return-merge.ll fix a bunch of spurious failures for people whose home directory 2009-09-11 17:02:12 +00:00
speculate-with-offset.ll Factor out Instruction::isSafeToSpeculativelyExecute's code for 2010-11-11 21:23:25 +00:00
SpeculativeExec.ll fix a bunch of spurious failures for people whose home directory 2009-09-11 17:02:12 +00:00
switch_create.ll enhance the "change or icmp's into switch" xform to handle one value in an 2010-12-13 04:50:38 +00:00
switch_formation.dbg.ll Delete useless trailing semicolons. 2010-01-05 17:55:26 +00:00
switch_switch_fold_dbginfo.ll Use opt -S instead of piping bitcode output through llvm-dis. 2009-09-08 22:34:10 +00:00
switch_switch_fold.ll Use opt -S instead of piping bitcode output through llvm-dis. 2009-09-08 22:34:10 +00:00
switch_thread.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
switch-simplify-crash.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
trapping-load-unreachable.ll Test case for r105914. 2010-06-13 16:16:54 +00:00
two-entry-phi-return.dbg.ll Delete useless trailing semicolons. 2010-01-05 17:55:26 +00:00
two-entry-phi-return.ll fix a bunch of spurious failures for people whose home directory 2009-09-11 17:02:12 +00:00
UncondBranchToReturn.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00
UnreachableEliminate.ll Change tests from "opt %s" to "opt < %s" so that opt doesn't see the 2009-09-11 18:01:28 +00:00