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2009-09-27Grab an LLVM Context from an instruction that exists rather than oneDan Gohman
that is deleted in some situations. This fixes a use-after-free. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82903 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-27Tell ScalarEvolution to forget everything it knows about a loop beforeDan Gohman
rotating the loop, since loop rotation is a very significant change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82901 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-27Instruction::clone does not need to take an LLVMContext&. Remove that andNick Lewycky
update all the callers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82889 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-26Fix SimplifyLibCalls to transfer attributes from callees rather thanDan Gohman
calls, since direct calls don't always reflect the attributes of their callees. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82867 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-25Rename ConstantFP's getInf to getInfinity.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82823 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-25Transform pow(x, 0.5) to (x == -inf ? inf : fabs(sqrt(x))), which isDan Gohman
typically faster then doing a general pow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82819 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-24Constant propagating byval pointer is safe if function is readonly.Torok Edwin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82700 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-24Don't constant propagate byval pointers, since they are not really pointers, butTorok Edwin
rather structs passed by value. This fixes PR5038. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82689 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21big endian systems shift by bits too, hopefully this will fix the ppc Chris Lattner
bootstrap problems. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82464 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21Nick pointed out that DominanceFrontier and DominanceTree are preservedDan Gohman
by setPreservesCFG(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82463 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21Remove the special-case for constants in PHI nodes; it's not reallyDan Gohman
helpful, and it didn't correctly handle the case of constants input to PHIs for backedges. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82462 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21fix PR5016, a crash I introduced in GVN handing first classChris Lattner
arrays and structs, which cannot be bitcast to integers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82460 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21enable non-local analysis and PRE of large store -> little load.Chris Lattner
This doesn't kick in too much because of phi translation issues, but this can be resolved in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82447 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21convert an std::pair to an explicit struct.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82446 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21move some functions, add a comment.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82444 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21split HandleLoadFromClobberingStore in two pieces: one that does theChris Lattner
analysis, one that does the xform. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82443 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21Improve GVN to be able to forward substitute a small load Chris Lattner
from a piece of a large store when both are in the same block. This allows clang to compile the testcase in PR4216 to this code: _test_bitfield: movl 4(%esp), %eax movl %eax, %ecx andl $-65536, %ecx orl $32962, %eax andl $40186, %eax orl %ecx, %eax ret This is not ideal, but is a whole lot better than the code produced by llvm-gcc: _test_bitfield: movw $-32574, %ax orw 4(%esp), %ax andw $-25350, %ax movw %ax, 4(%esp) movw 7(%esp), %cx shlw $8, %cx movzbl 6(%esp), %edx orw %cx, %dx movzwl %dx, %ecx shll $16, %ecx movzwl %ax, %eax orl %ecx, %eax ret and dramatically better than that produced by gcc 4.2: _test_bitfield: pushl %ebx call L3 "L00000000001$pb": L3: popl %ebx movl 8(%esp), %eax leal 0(,%eax,4), %edx sarb $7, %dl movl %eax, %ecx andl $7168, %ecx andl $-7201, %ebx movzbl %dl, %edx andl $1, %edx sall $5, %edx orl %ecx, %ebx orl %edx, %ebx andl $24, %eax andl $-58336, %ebx orl %eax, %ebx orl $32962, %ebx movl %ebx, %eax popl %ebx ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82439 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-21formatting cleanups, no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82426 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-20Move CoerceAvailableValueToLoadType earlier in GVN.cpp. Hook it upChris Lattner
so that nonlocal and partially redundant loads can use it as well. The testcase shows examples of craziness this can handle. This triggers *many* times in 176.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82403 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-20change the interface to CoerceAvailableValueToLoadType to be Chris Lattner
more generic. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82402 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-20enhance GVN to forward substitute a stored value to a loadChris Lattner
(and load -> load) when the base pointers must alias but when they are different types. This occurs very very frequently in 176.gcc and other code that uses bitfields a lot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82399 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-20Tabs -> spaces, and remove trailing whitespace.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82355 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-18Enhance transform passes so that they apply the same tranforms to malloc ↵Victor Hernandez
calls as to MallocInst. Reviewed by Dan Gohman. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82300 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-17Update CMake.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82097 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-16Add a new pass for doing late hoisting of floating-point and vectorDan Gohman
constants out of loops. These aren't covered by the regular LICM pass, because in LLVM IR constants don't require separate instructions. They're not always covered by the MachineLICM pass either, because it doesn't know how to unfold folded constant-pool loads. This is somewhat experimental at this point, and off by default. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82076 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-16Change FoldPHIArgBinOpIntoPHI to decline folding if it would introduce twoDan Gohman
phis, similar to the FoldPHIArgGEPIntoPHI change. Also, delete some comments that don't reflect the code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82053 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-16Preserve ProfileInfo during CodeGenPrepare.Andreas Neustifter
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82034 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-16Don't sink gep operators through phi nodes if the result would requireDan Gohman
more than one phi, since that leads to higher register pressure on entry to the phi. This is especially problematic when the phi is in a loop header, as it increases register pressure throughout the loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81993 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-15Add more newlines to make up for the ones removed from the end of instructions.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81851 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-15add newline to debug dumpChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81840 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-14When extending a memset range past the front, set the alignment of theDan Gohman
memset region to the alignment of the new start address. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81810 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-09Fix SplitCriticalEdge to properly update LCSSA form when splitting aDan Gohman
loop exit edge -- new PHIs may be needed not only for the additional splits that are made to preserve LoopSimplify form, but also for the original split. Factor out the code that inserts new PHIs so that it can be used for both. Remove LoopRotation.cpp's code for manually updating LCSSA form, as it is now redundant. This fixes PR4934. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81363 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-09Reflow comment.Mike Stump
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81361 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-09Fix an 80-column violation.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81354 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-08remove an extremely dubious instcombine transformation ofChris Lattner
extractelement(load). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81239 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-08Re-apply r80926, with fixes: keep the domtree informed of new blocksDan Gohman
that get created during loop unswitching, and fix SplitBlockPredecessors' LCSSA updating code to create new PHIs instead of trying to just move existing ones. Also, optimize Loop::verifyLoop, since it gets called a lot. Use searches on a sorted list of blocks instead of calling the "contains" function, as is done in other places in the Loop class, since "contains" does a linear search. Also, don't call verifyLoop from LoopSimplify or LCSSA, as the PassManager is already calling verifyLoop as part of LoopInfo's verifyAnalysis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81221 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-08remove a turdChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81186 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-08instcombine transforms vector loads that are only used byChris Lattner
extractelement operations into a bitcast of the pointer, then a gep, then a scalar load. Disable this when the vector only has one element, because it leads to infinite loops in instcombine (PR4908). This transformation seems like a really bad idea to me, as it will likely disable CSE of vector load/stores etc and can be better done in the code generator when profitable. This goes all the way back to the first days of packed types, r25299 specifically. I'll let those people who care about the performance of vector code decide what to do with this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81185 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-08Fix PR4882, by making MemCpyOpt not dereference removed stores to get theChris Lattner
context for the newly created operations. Patch by Jakub Staszak! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81175 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-07Reappy r80998, now that the GlobalOpt bug that it exposed on MiniSAT is fixed.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81172 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-06Remove some not-really-used variables, as warnedDuncan Sands
about by icc (#593, partial). Patch by Erick Tryzelaar. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81115 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-06Fix a possible crash call setIsInBounds.Daniel Dunbar
- I think there are more instances of this, but I think they are fixed in Dan's incoming patch. This one was preventing me from doing a bugpoint reduction though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81103 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-06Revert r80926. It causes loop unswitch assertion and slow down some JIT ↵Evan Cheng
tests significantly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81101 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-06Revert "Include optional subclass flags, such as inbounds, nsw, etc., ...", thisDaniel Dunbar
breaks MiniSAT on x86_64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81098 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-04Include optional subclass flags, such as inbounds, nsw, etc., in theDan Gohman
Constant uniquing tables. This allows distinct ConstantExpr objects with the same operation and different flags. Even though a ConstantExpr "a + b" is either always overflowing or never overflowing (due to being a ConstantExpr), it's still necessary to be able to represent it both with and without overflow flags at the same time within the IR, because the safety of the flag may depend on the context of the use. If the constant really does overflow, it wouldn't ever be safe to use with the flag set, however the use may be in code that is never actually executed. This also makes it possible to merge all the flags tests into a single test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80998 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-03Add a verifyAnalysis to LoopInfo, LoopSimplify, and LCSSA form that verifyDan Gohman
that these passes are properly preserved. Fix several transformation passes that claimed to preserve LoopSimplify form but weren't. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80926 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-03Change PHINode::hasConstantValue to have a DominatorTree argumentDan Gohman
instead of a bool argument, and to do the dominator check itself. This makes it eaiser to use when DominatorTree information is available. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80920 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-03Keep track of how many memmove calls were turned intoDuncan Sands
memcpy calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80915 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-03In C++, code is not allowed to call main. In C it is, thisChris Lattner
simplifylibcalls optimization is thus valid for C++ but not C. It's not important enough to worry about for C++ apps, so just remove it. rdar://7191924 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80887 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-03back out my recent commit (r80858), it seems to break self-hosting ↵Gabor Greif
buildbot's stage 2 configure git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80871 91177308-0d34-0410-b5e6-96231b3b80d8
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