Jakob Stoklund Olesen 58e9ee85fd Teach SimplifyCFG about magic pointer constants. ... Weird code sometimes uses pointer constants other than null. This patch teaches SimplifyCFG to build switch instructions in those cases. Code like this: void f(const char *x) { if (!x) puts("null"); else if ((uintptr_t)x == 1) puts("one"); else if (x == (char*)2 || x == (char*)3) puts("two"); else if ((intptr_t)x == 4) puts("four"); else puts(x); } Now becomes a switch: define void @f(i8* %x) nounwind ssp { entry: %magicptr23 = ptrtoint i8* %x to i64 ; <i64> [#uses=1] switch i64 %magicptr23, label %if.else16 [ i64 0, label %if.then i64 1, label %if.then2 i64 2, label %if.then9 i64 3, label %if.then9 i64 4, label %if.then14 ] Note that LLVM's own DenseMap uses magic pointers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95439 91177308-0d34-0410-b5e6-96231b3b80d8		2010-02-05 22:03:18 +00:00
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AddrModeMatcher.cpp	Change errs() to dbgs().	2010-01-05 01:26:54 +00:00
BasicBlockUtils.cpp	No need to look through bitcasts for DbgInfoIntrinsic	2010-01-21 23:09:12 +00:00
BasicInliner.cpp	Change errs() to dbgs().	2010-01-05 01:26:39 +00:00
BreakCriticalEdges.cpp	Add Loop contains utility methods for testing whether a loop	2009-12-18 01:24:09 +00:00
CloneFunction.cpp	Don't bother with sprintf, just pass the Twine through.	2010-01-27 19:58:47 +00:00
CloneLoop.cpp	Use do+while instead of while for loops which obviously have a	2010-01-05 16:27:25 +00:00
CloneModule.cpp	MapValue doesn't needs its LLVMContext argument.	2009-10-24 23:37:16 +00:00
CMakeLists.txt	Alphabetize.	2009-11-03 04:01:53 +00:00
CodeExtractor.cpp	Fix nondeterministic behavior.	2010-01-10 01:07:22 +00:00
DemoteRegToStack.cpp	Revert yesterday's change by removing the LLVMContext parameter to AllocaInst and MallocInst.	2009-07-15 23:53:25 +00:00
InlineFunction.cpp	Remove dead debug info intrinsics.	2010-01-05 01:10:40 +00:00
InstructionNamer.cpp	Avoid going through the LLVMContext for type equality where it's safe to dereference the type pointer.	2010-01-05 13:12:22 +00:00
LCSSA.cpp	Fix a comment in a typo that Duncan noticed.	2009-11-09 18:59:22 +00:00
Local.cpp	Fix pr6198 by moving the isSized() check to an outer conditional.	2010-02-01 17:41:44 +00:00
LoopSimplify.cpp	Use a SmallSetVector instead of a SetVector; this code showed up as a	2010-02-05 19:20:15 +00:00
LoopUnroll.cpp	Don't bother with sprintf, just pass the Twine through.	2010-01-27 19:58:47 +00:00
LowerInvoke.cpp	Avoid going through the LLVMContext for type equality where it's safe to dereference the type pointer.	2010-01-05 13:12:22 +00:00
LowerSwitch.cpp	Change errs() to dbgs().	2010-01-05 01:26:45 +00:00
Makefile	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00
Mem2Reg.cpp	Pull LLVMContext out of PromoteMemToReg.	2009-11-23 03:50:44 +00:00
PromoteMemoryToRegister.cpp	mem2reg erases the dbg.declare intrinsics that it converts to dbg.val intrinsics	2010-01-29 00:01:35 +00:00
SimplifyCFG.cpp	Teach SimplifyCFG about magic pointer constants.	2010-02-05 22:03:18 +00:00
SSAUpdater.cpp	Avoid creating redundant PHIs in SSAUpdater::GetValueInMiddleOfBlock.	2010-01-27 22:01:02 +00:00
SSI.cpp	Avoid going through the LLVMContext for type equality where it's safe to dereference the type pointer.	2010-01-05 13:12:22 +00:00
UnifyFunctionExitNodes.cpp	Avoid going through the LLVMContext for type equality where it's safe to dereference the type pointer.	2010-01-05 13:12:22 +00:00
ValueMapper.cpp	Avoid extra calls to MD->getNumOperands()	2010-01-26 23:29:09 +00:00