Chris Lattner c7d7e0cbe0 make simplifycfg insert an llvm.trap before the 'unreachable' it introduces ... when it detects undefined behavior. llvm.trap generally codegens into some thing really small (e.g. a 2 byte ud2 instruction on x86) and debugging this sort of thing is "nontrivial". For example, we now compile: void foo() { *(int*)0 = 42; } into: _foo: pushl %ebp movl %esp, %ebp ud2 Some may even claim that this is a security hole, though that seems dubious to me. This addresses rdar://7958343 - Optimizing away null dereference potentially allows arbitrary code execution git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103356 91177308-0d34-0410-b5e6-96231b3b80d8		2010-05-08 22:15:59 +00:00
..
2002-05-05-EmptyBlockMerge.ll
2002-05-21-PHIElimination.ll
2002-06-24-PHINode.ll
2002-09-24-PHIAssertion.ll
2003-03-07-DominateProblem.ll
2003-08-05-InvokeCrash.ll
2003-08-05-MishandleInvoke.ll
2003-08-17-BranchFold.ll
2003-08-17-BranchFoldOrdering.ll
2003-08-17-FoldSwitch-dbg.ll	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
2003-08-17-FoldSwitch.ll
2004-12-10-SimplifyCFGCrash.ll
2005-06-16-PHICrash.ll
2005-08-01-PHIUpdateFail.ll
2005-08-03-PHIFactorCrash.ll
2005-10-02-InvokeSimplify.ll
2005-12-03-IncorrectPHIFold.ll
2006-02-17-InfiniteUnroll.ll
2006-06-12-InfLoop.ll
2006-08-03-Crash.ll
2006-10-19-UncondDiv.ll
2006-10-29-InvokeCrash.ll
2006-12-08-Ptr-ICmp-Branch.ll
2007-11-22-InvokeNoUnwind.ll
2007-12-21-Crash.ll
2008-01-02-hoist-fp-add.ll
2008-04-23-MergeMultipleResultRet.ll
2008-04-27-MultipleReturnCrash.ll
2008-05-16-PHIBlockMerge.ll
2008-07-13-InfLoopMiscompile.ll
2008-09-08-MultiplePred.ll
2008-09-17-SpeculativeHoist.ll
2008-10-03-SpeculativelyExecuteBeforePHI.ll
2008-12-06-SingleEntryPhi.ll
2008-12-16-DCECond.ll
2009-01-18-PHIPropCrash.ll
2009-01-19-UnconditionalTrappingConstantExpr.ll
2009-03-05-Speculative-Hoist-Dbg.ll	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
2009-05-12-externweak.ll
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
basictest.ll	Implement PR5795 by merging duplicated return blocks. This could go further	2009-12-22 06:07:30 +00:00
branch_fold_dbg.ll	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
branch-branch-dbginfo.ll
branch-cond-merge.ll
branch-cond-prop.ll
branch-fold-test.ll
branch-fold.ll
branch-phi-thread.ll
BrUnwind.ll
dbginfo.ll
DeadSetCC.ll
dg.exp
duplicate-phis.ll	fix two bogus tests that the asmparser now rejects.	2009-12-30 05:54:51 +00:00
EqualPHIEdgeBlockMerge.ll
hoist-common-code.dbg.ll	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
hoist-common-code.ll
HoistCode.ll
invoke_unwind.ll
iterative-simplify.ll
MagicPointer.ll	Teach SimplifyCFG about magic pointer constants.	2010-02-05 22:03:18 +00:00
noreturn-call.ll
PhiBlockMerge2.ll
PhiBlockMerge.ll
PhiEliminate2.ll
PhiEliminate.ll
PhiNoEliminate.ll
return-merge.ll
SpeculativeExec.ll
switch_create.ll
switch_formation.dbg.ll	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
switch_formation.ll
switch_switch_fold_dbginfo.ll
switch_switch_fold.ll
switch_thread.ll
switch-simplify-crash.ll
trapping-load-unreachable.ll	make simplifycfg insert an llvm.trap before the 'unreachable' it introduces	2010-05-08 22:15:59 +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
UncondBranchToReturn.ll
UnreachableEliminate.ll