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path: root/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
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* Move optimization of some cases of (A & C1)|(B & C2) from instcombine to ↵Nick Lewycky2014-06-19
| | | | | | instsimplify. Patch by Rahul Jain, plus some last minute changes by me -- you can blame me for any bugs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211252 91177308-0d34-0410-b5e6-96231b3b80d8
* Reorder shuffle and binary operation.Serge Pavlov2014-05-11
| | | | | | | | | | | | | | This patch enables transformations: BinOp(shuffle(v1), shuffle(v2)) -> shuffle(BinOp(v1, v2)) BinOp(shuffle(v1), const1) -> shuffle(BinOp, const2) They allow to eliminate extra shuffles in some cases. Differential Revision: http://reviews.llvm.org/D3525 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208488 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++] Use 'nullptr'. Transforms edition.Craig Topper2014-04-25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207196 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Fix potential ODR violations by sinking the DEBUG_TYPEChandler Carruth2014-04-22
| | | | | | | | | | | | | | | | | definition below all of the header #include lines, lib/Transforms/... edition. This one is tricky for two reasons. We again have a couple of passes that define something else before the includes as well. I've sunk their name macros with the DEBUG_TYPE. Also, InstCombine contains headers that need DEBUG_TYPE, so now those headers #define and #undef DEBUG_TYPE around their code, leaving them well formed modular headers. Fixing these headers was a large motivation for all of these changes, as "leaky" macros of this form are hard on the modules implementation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206844 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Sink all the DEBUG_TYPE defines for InstCombine out of theChandler Carruth2014-04-21
| | | | | | | | | | | header files and into the cpp files. These files will require more touches as the header files actually use DEBUG(). Eventually, I'll have to introduce a matched #define and #undef of DEBUG_TYPE for the header files, but that comes as step N of many to clean all of this up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206777 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Move the ConstantRange class into the IR library. This isChandler Carruth2014-03-04
| | | | | | | | | | a bit surprising, as the class is almost entirely abstracted away from any particular IR, however it encodes the comparsion predicates which mutate ranges as ICmp predicate codes. This is reasonable as they're used for both instructions and constants. Thus, it belongs in the IR library with instructions and constants. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202838 91177308-0d34-0410-b5e6-96231b3b80d8
* [Modules] Move the LLVM IR pattern match header into the IR library, itChandler Carruth2014-03-04
| | | | | | obviously is coupled to the IR. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202818 91177308-0d34-0410-b5e6-96231b3b80d8
* Rename many DataLayout variables from TD to DL.Rafael Espindola2014-02-21
| | | | | | | | | I am really sorry for the noise, but the current state where some parts of the code use TD (from the old name: TargetData) and other parts use DL makes it hard to write a patch that changes where those variables come from and how they are passed along. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201827 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: Teach icmp merging about the equivalence of bit tests and ↵Benjamin Kramer2014-02-11
| | | | | | | | | UGE/ULT with a power of 2. This happens in bitfield code. While there reorganize the existing code a bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201176 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: Hoist 3 copies of AddOne/SubOne into a header.Benjamin Kramer2014-01-19
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199605 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: Replace a hand-rolled version of isKnownToBeAPowerOfTwo with ↵Benjamin Kramer2014-01-19
| | | | | | the real thing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199604 91177308-0d34-0410-b5e6-96231b3b80d8
* Update the docs to match the function name.Nadav Rotem2013-11-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194537 91177308-0d34-0410-b5e6-96231b3b80d8
* Fold (iszero(A&K1) | iszero(A&K2)) -> (A&(K1|K2)) != (K1|K2) if we know ↵Nadav Rotem2013-11-12
| | | | | | that K1 and K2 are 'one-hot' (only one bit is on). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194525 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: allow unmasked icmps to be combined with logical opsTim Northover2013-09-04
| | | | | | | | | | "(icmp op i8 A, B)" is equivalent to "(icmp op i8 (A & 0xff), B)" as a degenerate case. Allowing this as a "masked" comparison when analysing "(icmp) &/| (icmp)" allows us to combine them in more cases. rdar://problem/7625728 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189931 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: look for masked compares with subset relationTim Northover2013-09-04
| | | | | | | | | | | Even in cases which aren't universally optimisable like "(A & B) != 0 && (A & C) != 0", the masks can make one of the comparisons completely redundant. In this case, since we've gone to the effort of spotting masked comparisons we should combine them. rdar://problem/7625728 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189930 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: Use isAllOnesValue() instead of explicit -1.Jim Grosbach2013-08-16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188563 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: Simplify if(x!=0 && x!=-1).Jim Grosbach2013-08-16
| | | | | | | | | | | When both constants are positive or both constants are negative, InstCombine already simplifies comparisons like this, but when it's exactly zero and -1, the operand sorting ends up reversed and the pattern fails to match. Handle that special case. Follow up for rdar://14689217 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188512 91177308-0d34-0410-b5e6-96231b3b80d8
* Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector ↵Craig Topper2013-07-14
| | | | | | size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186274 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: (icmp eq B, 0) | (icmp ult A, B) -> (icmp ule A, B-1)David Majnemer2013-07-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This transform allows us to turn IR that looks like: %1 = icmp eq i64 %b, 0 %2 = icmp ult i64 %a, %b %3 = or i1 %1, %2 ret i1 %3 into: %0 = add i64 %b, -1 %1 = icmp uge i64 %0, %a ret i1 %1 which means we go from lowering: cmpq %rsi, %rdi setb %cl testq %rsi, %rsi sete %al orb %cl, %al ret to lowering: decq %rsi cmpq %rdi, %rsi setae %al ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185677 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unneeded cast<>.Jakub Staszak2013-06-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183363 91177308-0d34-0410-b5e6-96231b3b80d8
* Use IRBuilder instead of ConstantInt methods.Jakub Staszak2013-06-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183360 91177308-0d34-0410-b5e6-96231b3b80d8
* Replace Count{Leading,Trailing}Zeros_{32,64} with count{Leading,Trailing}Zeros.Michael J. Spencer2013-05-24
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182680 91177308-0d34-0410-b5e6-96231b3b80d8
* Reorders two transforms that collide with each otherDavid Majnemer2013-04-14
| | | | | | | | | | | | | | | | | | | | | | | One performs: (X == 13 | X == 14) -> X-13 <u 2 The other: (A == C1 || A == C2) -> (A & ~(C1 ^ C2)) == C1 The problem is that there are certain values of C1 and C2 that trigger both transforms but the first one blocks out the second, this generates suboptimal code. Reordering the transforms should be better in every case and allows us to do interesting stuff like turn: %shr = lshr i32 %X, 4 %and = and i32 %shr, 15 %add = add i32 %and, -14 %tobool = icmp ne i32 %add, 0 into: %and = and i32 %X, 240 %tobool = icmp ne i32 %and, 224 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179493 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: Check the operand types before merging fcmp ord & fcmp ord.Benjamin Kramer2013-04-12
| | | | | | Fixes PR15737. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179417 91177308-0d34-0410-b5e6-96231b3b80d8
* Tidy up a bit. No functional change.Jim Grosbach2013-04-05
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178915 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify code. No functionality change.Jakub Staszak2013-03-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176765 91177308-0d34-0410-b5e6-96231b3b80d8
* The transform is:Bill Wendling2013-02-16
| | | | | | | | | | | | | | | | (or (bool?A:B),(bool?C:D)) --> (bool?(or A,C):(or B,D)) By the time the OR is visited, both the SELECTs have been visited and not optimized and the OR itself hasn't been transformed so we do this transform in the hopes that the new ORs will be optimized. The transform is explicitly disabled for vector-selects until "codegen matures to handle them better". Patch by Muhammad Tauqir! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175380 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: canonicalize sext-and --> selectNadav Rotem2013-01-30
| | | | | | | | | | sext-not-and --> select. Patch by Muhammad Tauqir Ahmad. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173901 91177308-0d34-0410-b5e6-96231b3b80d8
* Move all of the header files which are involved in modelling the LLVM IRChandler Carruth2013-01-02
| | | | | | | | | | | | | | | | | | | | | into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
* Add extra CHECK to make sure that 'or' instruction was replaced.Jakub Staszak2012-12-31
| | | | | | | Also add an assert to avoid confusion in the code where is known that C1 <= C2. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171310 91177308-0d34-0410-b5e6-96231b3b80d8
* Grammo.Jakub Staszak2012-12-31
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171272 91177308-0d34-0410-b5e6-96231b3b80d8
* Transform (A == C1 || A == C2) into (A & ~(C1 ^ C2)) == C1Jakub Staszak2012-12-31
| | | | | | | | if C1 and C2 differ only with one bit. Fixes PR14708. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171270 91177308-0d34-0410-b5e6-96231b3b80d8
* Formatting fixes. Remove some unnecessary 'else' after 'return'. No ↵Craig Topper2012-12-20
| | | | | | functional change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170676 91177308-0d34-0410-b5e6-96231b3b80d8
* Removing trailing whitespaceCraig Topper2012-12-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170675 91177308-0d34-0410-b5e6-96231b3b80d8
* Use the new script to sort the includes of every file under lib.Chandler Carruth2012-12-03
| | | | | | | | | | | | | | | | | Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
* rdar://12329730 (defect 2)Shuxin Yang2012-11-26
| | | | | | | | | | | | | | | Enhancement to InstCombine. Try to catch this opportunity: --------------------------------------------------------------- ((X^C1) >> C2) ^ C3 => (X>>C2) ^ ((C1>>C2)^C3) where the subexpression "X ^ C1" has more than one uses, and "(X^C1) >> C2" has single use. ---------------------------------------------------------------- Reviewed by Nadav (with minor change per his request). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168615 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombineAndOrXor.cpp: Escape bracket in doxygen description. ↵NAKAMURA Takumi2012-11-15
| | | | | | [-Wdocumentation] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168013 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert 'Fix a typo 'iff' => 'if''. iff is an abreviation of if and only if. ↵Sylvestre Ledru2012-09-27
| | | | | | See: http://en.wikipedia.org/wiki/If_and_only_if Commit 164767 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164768 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a typo 'iff' => 'if'Sylvestre Ledru2012-09-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164767 91177308-0d34-0410-b5e6-96231b3b80d8
* InstCombine: fix a bug when combining (fcmp cc0 x, y) && (fcmp cc1 x, y).Manman Ren2012-06-14
| | | | | | | uno && ueq was converted to ueq, it should be converted to uno. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158441 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix combine of uno && ord -> false so that the ordering of the fcmps doesn'tChad Rosier2012-06-06
| | | | | | | | matter. rdar://11579835 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158084 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix suspicous hasOneUse() check, found by PVS Studio (PR12357).Benjamin Kramer2012-05-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157592 91177308-0d34-0410-b5e6-96231b3b80d8
* Add instcombine patterns for the following transformations:Chad Rosier2012-04-26
| | | | | | | | | | | (x & y) | (x ^ y) -> x | y (x & y) + (x ^ y) -> x | y Patch by Manman Ren. rdar://10770603 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155674 91177308-0d34-0410-b5e6-96231b3b80d8
* eliminate an unneeded branch, part of PR12357Chris Lattner2012-03-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153458 91177308-0d34-0410-b5e6-96231b3b80d8
* In InstCombiner::visitOr, make sure we reverse the operand swap used for ↵Eli Friedman2012-03-16
| | | | | | checking for or-of-xor operations after those checks; a later check expects that any constant will be in Op1. PR12234. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152884 91177308-0d34-0410-b5e6-96231b3b80d8
* Restrict this transformation to equality conditions.Bill Wendling2012-02-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This transformation is not correct for not-equal conditions: (trunc x) != C1 & (and x, CA) != C2 -> (and x, CA|CMAX) != C1|C2 Let C1 == 0 C2 == 0 CA == 0xFF0000 CMAX == 0xFF and truncating to i8. The original truth table: x | A: trunc x != 0 | B: x & 0xFF0000 != 0 | A & B != 0 -------------------------------------------------------------- 0x00000 | 0 | 0 | 0 0x00001 | 1 | 0 | 0 0x10000 | 0 | 1 | 0 0x10001 | 1 | 1 | 1 The truth table of the replacement: x | x & 0xFF00FF != 0 ---------------------------- 0x00000 | 0 0x00001 | 1 0x10000 | 1 0x10001 | 1 So they are different. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151691 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert assert(0) to llvm_unreachableCraig Topper2012-02-07
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149967 91177308-0d34-0410-b5e6-96231b3b80d8
* Make helper static.Benjamin Kramer2012-02-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149865 91177308-0d34-0410-b5e6-96231b3b80d8
* More dead code removal (using -Wunreachable-code)David Blaikie2012-01-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148578 91177308-0d34-0410-b5e6-96231b3b80d8
* Move assert to the right place.Benjamin Kramer2012-01-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147779 91177308-0d34-0410-b5e6-96231b3b80d8
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