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path: root/lib/Analysis/ValueTracking.cpp
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2009-02-24Fix a ValueTracking rule: RHS means operand 1, not 0. Add a simpleDan Gohman
ashr instcombine to help expose this code. And apply the fix to SelectionDAG's copy of this code too. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65364 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-20Eliminate use of uint32_t to improve compatibility with cygwinChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62590 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-12Rename getABITypeSize to getTypePaddedSize, asDuncan Sands
suggested by Chris. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62099 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-08ValueTracker can't assume that an alloca with no specified alignment Chris Lattner
will get its preferred alignment. It has to be careful and cautiously assume it will just get the ABI alignment. This prevents instcombine from rounding up the alignment of a load/store without adjusting the alignment of the alloca. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61934 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-27Re-apply 55137 with fixes.David Greene
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58296 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-21Temporarily reverting r55137. This was causing the bootstrap to go into anBill Wendling
infinite loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55149 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-21Fix ComputeMaskedBits to handle phis correctly. We need to take theDavid Greene
minimum of the known zeros. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55137 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-13Fix a bogus srem rule - a negative value srem'd by a power-of-2Dan Gohman
can have a non-negative result; for example, -16%16 is 0. Also, clarify the related comments. This fixes PR2670. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54767 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-16Don't use ++idx_begin when I actually mean idx_begin + 1, especially since weMatthijs Kooijman
also use *idx_begin in the same expression, giving unpredictable results. This fixes this bug: http://lists.cs.uiuc.edu/pipermail/llvmdev/2008-July/015877.html git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53670 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-30- Re-apply 52748 and friends with fix. GetConstantStringInfo() returns an ↵Evan Cheng
empty string for ConstantAggregateZero case which surprises selectiondag. - Correctly handle memcpy from constant string which is zero-initialized. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52891 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-29Revert (52748 and friends):Anton Korobeynikov
Move GetConstantStringInfo to lib/Analysis. Remove string output routine from Constant. Update all callers. Change debug intrinsic api slightly to accomodate move of routine, these now return values instead of strings. This unbreaks llvm-gcc bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52884 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-28Add back the capability to include nul characters in strings with Chris Lattner
GetConstantStringInfo. This will hopefully restore llvm-gcc to happy bootstrap land. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52851 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-28Tighten up checking.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52850 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-27fix the regressions from Eric's patch by making GetConstantStringInfoChris Lattner
tolerate a non-nul-terminated string, and handling a direct global reference. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52813 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-26Reserve the size we'll need in advance.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52763 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-26Move GetConstantStringInfo to lib/Analysis. RemoveEric Christopher
string output routine from Constant. Update all callers. Change debug intrinsic api slightly to accomodate move of routine, these now return values instead of strings. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52748 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-19Fix some warnings reported by gcc-4.3. HopefullyDuncan Sands
this still compiles on windows - I can't test! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52488 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-17Use a SmallVector instead of an array, since auto_ptr doesn't handle arraysMatthijs Kooijman
properly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52390 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16Make BuildSubAggregate use FindInsertedElement again to prevent it fromMatthijs Kooijman
inserting extractvalues. In particular, this prevents the insertion of extractvalues that can't be folded away later. Also add an example of when this stuff is needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52328 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16Make the InsertBefore argument to FindInsertedValue optional, so you can ↵Matthijs Kooijman
find an inserted value without modifying the code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52319 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16Pass around Instruction* instead of Instruction& in FindInsertedValue and ↵Matthijs Kooijman
friends. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52318 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-1680 column fixes.Matthijs Kooijman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52316 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-16Move FindScalarValue from InstructionCombining.cpp to ValueTracking.cpp. WhileMatthijs Kooijman
I'm at it, rename it to FindInsertedValue. The only functional change is that newly created instructions are no longer added to instcombine's worklist, but that is not really necessary anyway (and I'll commit some improvements next that will completely remove the need). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52315 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-04Add #includes required by GCC 4.3, thanks for Zhongxing XuChris Lattner
for reporting this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51926 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-02Remove unneeded code I added.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51878 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-02move CannotBeNegativeZero to ValueTracking. Simplify some signbit comparisons.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51864 91177308-0d34-0410-b5e6-96231b3b80d8
2008-06-02move ComputeMaskedBits, MaskedValueIsZero, and ComputeNumSignBitsChris Lattner
out of instcombine into a new file in libanalysis. This also teaches ComputeNumSignBits about the number of sign bits in a constantint. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51863 91177308-0d34-0410-b5e6-96231b3b80d8
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