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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
2009-09-03In 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
2009-09-02Fix month.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80769 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-02fix PR4815: some cases where DeleteDeadInstruction can deleteChris Lattner
the instruction BBI points to. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80768 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-02fix PR4848 an infinite loop when indexing down through a recursive gepChris Lattner
and we get the original pointer type. This doesn't mean that we're at the first pointer being indexed. Correct the predicate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80762 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-02fix PR4837, some bugs folding vector compares. TheseChris Lattner
return a vector of i1, not i1 itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80761 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-01enhance memcpy opt to turn memmoves into memcpy when the src/destChris Lattner
don't alias. Remove an old and poorly reduced testcase that fails with this transform for reasons unrelated to the original test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80693 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-01testcase for PR3601Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80664 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-01Change CallGraphNode to maintain it's Function as an AssertingVHChris Lattner
for sanity. This didn't turn up any bugs. Change CallGraphNode to maintain its "callsite" information in the call edges list as a WeakVH instead of as an instruction*. This fixes a broad class of dangling pointer bugs, and makes CallGraph have a number of useful invariants again. This fixes the class of problem indicated by PR4029 and PR3601. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80663 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-31fix a crash building SPASS by tolerating a callsite that doesn't existChris Lattner
in the callgraph, see the big comment at the top of the testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80541 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-31fix a bug I introduced with my 'instcombine builder' refactoring Chris Lattner
changes: SimplifyDemandedBits can't use the builder yet because it has the wrong insertion point. This fixes a crash building MultiSource/Benchmarks/PAQ8p git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80537 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-31Fix PR4834, a tricky case where the inliner would resolve anChris Lattner
indirect function pointer, inline it, then go to delete the body. The problem is that the callgraph had other references to the function, though the inliner had no way to know it, so we got a dangling pointer and an invalid iterator out of the deal. The fix to this is pretty simple: stop the inliner from deleting the function by knowing that there are references to it. Do this by making CallGraphNodes contain a refcount. This requires moving deletion of available_externally functions to the module-level cleanup sweep where it belongs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80533 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30rename testChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80523 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30merge all sinking tests into one and convert them to filecheck.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80522 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30convert scalar_promote to filecheck style and merge ↵Chris Lattner
2003-12-13-VolatilePromote.ll into it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80521 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30suck a bunch more gep tests into getelementptr.ll and filecheckize them all.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80517 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30consolodate various GEP tests into getelementptr.ll using filecheck.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80514 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30another huge testcase, this time from 'gs' in llvm-test.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80513 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30remove another poorly-reduced testcase which came from ldecod in llvm-test.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80512 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30this testcase is 500 lines long and is distilled from bzip2, justChris Lattner
remove it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80511 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30convert to filecheckChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80510 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-30Fix PR4748: don't fold gep(bitcast(x)) into bitcast(gep) when x Chris Lattner
is itself a bitcast. Since we have gep(bitcast(bitcast(y))) in this case, just wait for the two bitcasts to get zapped. This prevents instcombine from confusing some aliasing stuff, and allows it to directly eliminate the load in the testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80508 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-28Reapply 79977.Devang Patel
Use MDNodes to encode debug info in llvm IR. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80406 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-28Fix PR3913, patch by Jakub Staszak!Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80327 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-27Implement a new optimization in the inliner: if inlining multipleChris Lattner
calls into a function and if the calls bring in arrays, try to merge them together to reduce stack size. For example, in the testcase we'd previously end up with 4 allocas, now we end up with 2 allocas. As described in the comments, this is not really the ideal solution to this problem, but it is surprisingly effective. For example, on 176.gcc, we end up eliminating 67 arrays at "gccas" time and another 24 at "llvm-ld" time. One piece of concern that I didn't look into: at -O0 -g with forced inlining this will almost certainly result in worse debug info. I think this is acceptable though given that this is a case of "debugging optimized code", and we don't want debug info to prevent the optimizer from doing things anyway. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80215 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-27the inliner shouldn't crash on this.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80214 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-26Revert 79977. It causes llvm-gcc bootstrap failures on some platforms.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80073 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-25Special-case static allocas in IndVarSimplify's loop invariantDan Gohman
sinking code, since they are special. If the loop preheader happens to be the entry block of a function, don't sink static allocas out of it. This fixes PR4775. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80010 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-25Remove obsolete -f flags.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79992 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-25Update DebugInfo interface to use metadata, instead of special named ↵Devang Patel
llvm.dbg.... global variables, to encode debugging information in llvm IR. This is mostly a mechanical change that tests metadata support very well. This change speeds up llvm-gcc by more then 6% at "-O0 -g" (measured by compiling InstructionCombining.cpp!) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79977 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-21Change getelementptr folding to use APInt instead of uint64_t forDan Gohman
offset computations. This fixes a truncation bug on targets that don't have 64-bit pointers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79639 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-19Add targetdata strings to these tests, since SimplifyLibCalls usesDan Gohman
TargetData to find the pointer size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79490 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-19Fix a bug in the over-index constant folding. When over-indexing anDan Gohman
array member of a struct, it's possible to land in an arbitrary position inside that struct, such that attempting to find further getelementptr indices will fail. In such cases, folding cannot be done. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79485 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-19Canonicalize indices in a constantexpr GEP. If Indices exceed theDan Gohman
static extents of the static array type, it causes GlobalOpt and other passes to be more conservative. This canonicalization also allows the constant folder to add "inbounds" to GEPs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79440 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-19Fix up PHI nodes correctly in the presence of unreachable BBs, part two. AlsoNick Lewycky
delete a newed pointer, and improve readability a little bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79411 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-19Fix SimplifyLibcalls and ValueTracking to check mayBeOverriddenDan Gohman
before performing optimizations based on constant string values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79384 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-18Generalize ScalarEvolution to be able to analyze GEPs whenDan Gohman
TargetData is not present. It still uses TargetData when available. This generalization also fixed some limitations in the TargetData case; the attached testcase covers this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79344 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-18Fix a bug that caused globalopt to miscompile tramp3d: don't missDan Gohman
unruly indices for arrays that are members of structs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79337 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17Test the pass the test is actually for, instead of one that doesn't exist.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79257 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17Don't crash on critical edge. Patch by Andre Tavares.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79252 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17Add a test that shows that SSI is working correctly.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79230 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-17Don't crash trying to promote VLAs.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79226 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-16Fix for PR3016: detect the tricky case, where there are Eli Friedman
unfoldable references to a PHI node in the block being folded, and disable the transformation in that case. The correct transformation of such PHI nodes depends on whether BB dominates Succ, and dominance is expensive to compute here. (Alternatively, it's possible to check whether any uses are live, but that's also essentially a dominance calculation. Another alternative is to use reg2mem, but it probably isn't a good idea to use that in simplifycfg.) Also, remove some incorrect code from CanPropagatePredecessorsForPHIs which is made unnecessary with this patch: it didn't consider the case where a PHI node in BB has multiple uses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79174 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-15SSI construction should just go ahead and ignore instructions in unreachableNick Lewycky
blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79132 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-13When InstCombine simplifies a load -> extract element to gep -> load, placeMon P Wang
the new load by the old load instead of by the extract element because a store could have occurred between the load and extract element. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78891 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-12Make LLVM Assembly dramatically easier to read by aligning the comments,Dan Gohman
using formatted_raw_ostream's PadToColumn. Before: bb1: ; preds = %bb %2 = sext i32 %i.01 to i64 ; <i64> [#uses=1] %3 = getelementptr double* %p, i64 %2 ; <double*> [#uses=1] %4 = load double* %3, align 8 ; <double> [#uses=1] %5 = fmul double %4, 1.100000e+00 ; <double> [#uses=1] %6 = sext i32 %i.01 to i64 ; <i64> [#uses=1] %7 = getelementptr double* %p, i64 %6 ; <double*> [#uses=1] After: bb1: ; preds = %bb %2 = sext i32 %i.01 to i64 ; <i64> [#uses=1] %3 = getelementptr double* %p, i64 %2 ; <double*> [#uses=1] %4 = load double* %3, align 8 ; <double> [#uses=1] %5 = fmul double %4, 1.100000e+00 ; <double> [#uses=1] %6 = sext i32 %i.01 to i64 ; <i64> [#uses=1] %7 = getelementptr double* %p, i64 %6 ; <double*> [#uses=1] Several tests required whitespace adjustments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78816 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-12Transform -X/C to X/-C, implementing a README.txt entry.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78812 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-12Optimize (x/C)*C to x if the division is exact.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78811 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-11Optimize exact sdiv by a constant power of 2 to ashr.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78714 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-11Don't assume that external global variables are aligned at their preferredDan Gohman
alignment. Only the minimum alignment guaranteed by the ABI may be assumed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78668 91177308-0d34-0410-b5e6-96231b3b80d8
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