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2009-11-07Teach dead store elimination that certain intrinsics write to memory just likeNick Lewycky
a store. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86359 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-07reapply 86289, 86278, 86270, 86267, 86266 & 86264 plus a fixChris Lattner
(making pred factoring only happen if threading is guaranteed to be successful). This now survives an X86-64 bootstrap of llvm-gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86355 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-07Oops, FunctionContainsEscapingAllocas is really used to mean two differentNick Lewycky
things. Back out part of r86349 for a moment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86353 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-07Dust off tail recursion elimination. Fix a fixme by applying CaptureTrackingNick Lewycky
and add a .ll to demo the new capability. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86349 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-07Revert following patches to fix llvmgcc bootstrap.Devang Patel
86289, 86278, 86270, 86267, 86266 & 86264 Chris, please take a look. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86321 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-07- new SROA mallocs should have the mallocs running-or'ed, not the malloc's ↵Victor Hernandez
bitcast - fix ProcessInternalGlobal() debug output git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86317 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-07Avoid "ambiguous 'else'" warning from gcc.Jeffrey Yasskin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86314 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-07Re-commit r86077 now that r86290 fixes the 179.art and 175.vpr ARM regressions.Victor Hernandez
Here is the original commit message: This commit updates malloc optimizations to operate on malloc calls that have constant int size arguments. Update CreateMalloc so that its callers specify the size to allocate: MallocInst-autoupgrade users use non-TargetData-computed allocation sizes. Optimization uses use TargetData to compute the allocation size. Now that malloc calls can have constant sizes, update isArrayMallocHelper() to use TargetData to determine the size of the malloced type and the size of malloced arrays. Extend getMallocType() to support malloc calls that have non-bitcast uses. Update OptimizeGlobalAddressOfMalloc() to optimize malloc calls that have non-bitcast uses. The bitcast use of a malloc call has to be treated specially here because the uses of the bitcast need to be replaced and the bitcast needs to be erased (just like the malloc call) for OptimizeGlobalAddressOfMalloc() to work correctly. Update PerformHeapAllocSRoA() to optimize malloc calls that have non-bitcast uses. The bitcast use of the malloc is not handled specially here because ReplaceUsesOfMallocWithGlobal replaces through the bitcast use. Update OptimizeOnceStoredGlobal() to not care about the malloc calls' bitcast use. Update all globalopt malloc tests to not rely on autoupgraded-MallocInsts, but instead use explicit malloc calls with correct allocation sizes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86311 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06Fix a bug where we'd call SplitBlockPredecessors with a pred in the Chris Lattner
set only once even if it has multiple edges to BB. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86299 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06Remove function left over from other jump threading cleanup.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86289 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06Fix a problem discovered on self host.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86278 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06remove more code subsumed by r86264Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86270 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06eliminate some more code subsumed by r86264Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86267 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06remove now redundant code, r86264 handles this case.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86266 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06Extend jump threading to support much more general threadingChris Lattner
predicates. This allows us to jump thread things like: _ZN12StringSwitchI5ColorE4CaseILj7EEERS1_RAT__KcRKS0_.exit119: %tmp1.i24166 = phi i8 [ 1, %bb5.i117 ], [ %tmp1.i24165, %_Z....exit ], [ %tmp1.i24165, %bb4.i114 ] %toBoolnot.i87 = icmp eq i8 %tmp1.i24166, 0 ; <i1> [#uses=1] %tmp4.i90 = icmp eq i32 %tmp2.i, 6 ; <i1> [#uses=1] %or.cond173 = and i1 %toBoolnot.i87, %tmp4.i90 ; <i1> [#uses=1] br i1 %or.cond173, label %bb4.i96, label %_ZN12... Where it is "obvious" that when coming from %bb5.i117 that the 'and' is always false. This triggers a surprisingly high number of times in the testsuite, and gets us closer to generating good code for doug's strswitch testcase. This also make a bunch of other code in jump threading redundant, I'll rip out in the next patch. This survived an enable-checking llvm-gcc bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86264 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06remove some more Context arguments.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86235 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06remove a bunch of extraneous LLVMContext argumentsChris Lattner
from various APIs, addressing PR5325. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86231 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-06Revert r86077 because it caused crashes in 179.art and 175.vpr on ARMVictor Hernandez
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86213 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Teach LSR to avoid calling SplitCriticalEdge on edges with indirectbr.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86193 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Avoid calling getUniqueExitBlocks from within LoopSimplify, as it dependsDan Gohman
on loops having dedicated exits, which LoopSimplify can no longer always guarantee. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86181 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05LoopDeletion depends on loops having dedicated exits.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86180 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05The introduction of indirectbr meant the introduction ofDan Gohman
unsplittable critical edges, which means the introduction of loops which cannot be transformed to LoopSimplify form. Fix LoopSimplify to avoid transforming such loops into invalid code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86176 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Update various Loop optimization passes to cope with the possibility thatDan Gohman
LoopSimplify form may not be available. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86175 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Teach LoopUnroll how to bail if LoopSimplify can't give it what it needs.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86164 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Call getAnalysis<LoopInfo> the normal way, instead of asking passed-inDan Gohman
LoopPassManager for it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86163 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Delete an unused member variable.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86160 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Add an assertion to catch indirectbr in SplitBlockPredecessors. ThisDan Gohman
makes several optimization passes abort in cases where they're currently silently miscompiling code. Remove the indirectbr assertion from SplitEdge. Indirectbr is only a problem for critical edges, and SplitEdge defers to SplitCriticalEdge to handle those, and SplitCriticalEdge has its own assertion for indirectbr. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86147 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Teach SimplifyLibCalls to fold memcmp calls with constant arguments.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86141 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Do map insert+find in one step. TODO -= 2.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86133 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-05Update CreateMalloc so that its callers specify the size to allocate:Victor Hernandez
MallocInst-autoupgrade users use non-TargetData-computed allocation sizes. Optimization uses use TargetData to compute the allocation size. Now that malloc calls can have constant sizes, update isArrayMallocHelper() to use TargetData to determine the size of the malloced type and the size of malloced arrays. Extend getMallocType() to support malloc calls that have non-bitcast uses. Update OptimizeGlobalAddressOfMalloc() to optimize malloc calls that have non-bitcast uses. The bitcast use of a malloc call has to be treated specially here because the uses of the bitcast need to be replaced and the bitcast needs to be erased (just like the malloc call) for OptimizeGlobalAddressOfMalloc() to work correctly. Update PerformHeapAllocSRoA() to optimize malloc calls that have non-bitcast uses. The bitcast use of the malloc is not handled specially here because ReplaceUsesOfMallocWithGlobal replaces through the bitcast use. Update OptimizeOnceStoredGlobal() to not care about the malloc calls' bitcast use. Update all globalopt malloc tests to not rely on autoupgraded-MallocInsts, but instead use explicit malloc calls with correct allocation sizes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86077 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-04improve DSE when TargetData is not around, based on work byChris Lattner
Hans Wennborg! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86067 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-04Fix an iterator invalidation bug that happens when a hashtableChris Lattner
resizes in IPSCCP. This fixes PR5394. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86036 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-04move two functions up higher in the file. Delete a useless argumentChris Lattner
to EmitGEPOffset. Implement some new transforms for optimizing subtracts of two pointer to ints into the same vector. This happens for C++ iterator idioms for example, stringmap takes a const char* that points to the start and end of a string. Once inlined, we want the pointer difference to turn back into a length. This is rdar://7362831. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86021 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03reimplement multiple return value handling in IPSCCP, making it Chris Lattner
more aggressive an correct. This survives building llvm in 64-bit mode with optimizations and the built llvm passes make check. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85973 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03finish half thunk thoughtChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85937 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03fix an IPSCCP bug I introduced when I changed IPSCCP to start working on Chris Lattner
functions that don't have local linkage. Basically, we need to be more careful about propagating argument information to functions whose results we aren't tracking. This fixes a miscompilation of LLVMCConfigurationEmitter.cpp when built with an llvm-gcc that has ipsccp enabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85923 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03fix a subtle bug I introduced when refactoring SCCP. TestcaseChris Lattner
to follow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85903 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03Eliminate some temporaries.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85896 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03remove a isFreeCall check: it is a callinst that can write to memory already.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85863 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03Alphabetize.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85859 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-03turn IPSCCP back on now that the iterator invalidation bug is fixed.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85858 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02fix a nasty iterator invalidation bug from my conversion fromChris Lattner
std::map to DenseMap, exposed on release llvm-gcc bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85840 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02revert r8579[56], which are causing unhappiness in buildbot land.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85818 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02disable IPSCCP support for multiple return values, it is buggy, so justChris Lattner
disable it until I can fix it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85810 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02improve IPSCCP to be able to propagate the result of "!mayBeOverridden"Chris Lattner
function to calls of that function, regardless of whether it has local linkage or has its address taken. Not escaping should only affect whether we make an aggressive assumption about the arguments to a function, not whether we can track the result of it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85795 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02don't mark the arguments of prototype overdefined, they will never be queried.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85793 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02restore some code I removed in r85788, refactor it intoChris Lattner
a shared place instead of duplicating it 4 times. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85792 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02remove some confused code that dates from when we hadChris Lattner
"multiple return values" but not "first class aggregates" git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85791 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02avoid redundant lookups in BBExecutable, and make it a SmallPtrSet.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85790 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-02Use the libanalysis 'ConstantFoldLoadFromConstPtr' functionChris Lattner
instead of reinventing SCCP-specific logic. This gives us new powers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85789 91177308-0d34-0410-b5e6-96231b3b80d8
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