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path: root/lib/Transforms/Scalar/LoopStrengthReduce.cpp
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* Do not use typeinfo to identify pass in pass manager.Devang Patel2007-05-01
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36632 91177308-0d34-0410-b5e6-96231b3b80d8
* FixDevang Patel2007-04-23
| | | | | | | http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070423/048333.html git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36380 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove ImmediateDominator analysis. The same information can be obtained ↵Owen Anderson2007-04-15
| | | | | | | | | | | from DomTree. A lot of code for constructing ImmediateDominator is now folded into DomTree construction. This is part of the ongoing work for PR217. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36063 91177308-0d34-0410-b5e6-96231b3b80d8
* Now that codegen prepare isn't defeating me, I can finally fix what I setChris Lattner2007-04-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | out to do! :) This fixes a problem where LSR would insert a bunch of code into each MBB that uses a particular subexpression (e.g. IV+base+C). The problem is that this code cannot be CSE'd back together if inserted into different blocks. This patch changes LSR to attempt to insert a single copy of this code and share it, allowing codegenprepare to duplicate the code if it can be sunk into various addressing modes. On CodeGen/ARM/lsr-code-insertion.ll, for example, this gives us code like: add r8, r0, r5 str r6, [r8, #+4] .. ble LBB1_4 @cond_next LBB1_3: @cond_true str r10, [r8, #+4] LBB1_4: @cond_next ... LBB1_5: @cond_true55 ldr r6, LCPI1_1 str r6, [r8, #+4] instead of: add r10, r0, r6 str r8, [r10, #+4] ... ble LBB1_4 @cond_next LBB1_3: @cond_true add r8, r0, r6 str r10, [r8, #+4] LBB1_4: @cond_next ... LBB1_5: @cond_true55 add r8, r0, r6 ldr r10, LCPI1_1 str r10, [r8, #+4] Besides being smaller and more efficient, this makes it immediately obvious that it is profitable to predicate LBB1_3 now :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35972 91177308-0d34-0410-b5e6-96231b3b80d8
* switch LSR to use isLegalAddressingMode instead of other simpler hooksChris Lattner2007-04-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35837 91177308-0d34-0410-b5e6-96231b3b80d8
* Completely purge DomSet. This is the (hopefully) final patch for PR1171.Owen Anderson2007-04-07
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35731 91177308-0d34-0410-b5e6-96231b3b80d8
* split some code out into a helper functionChris Lattner2007-04-03
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35615 91177308-0d34-0410-b5e6-96231b3b80d8
* allow -1 strides to reuse "1" strides.Chris Lattner2007-04-02
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35607 91177308-0d34-0410-b5e6-96231b3b80d8
* Pass the type of the store access, not the type of the store, into theChris Lattner2007-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | target hook. This allows us to codegen a loop as: LBB1_1: @cond_next mov r2, #0 str r2, [r0, +r3, lsl #2] add r3, r3, #1 cmn r3, #1 bne LBB1_1 @cond_next instead of: LBB1_1: @cond_next mov r2, #0 str r2, [r0], #+4 add r3, r3, #1 cmn r3, #1 bne LBB1_1 @cond_next This looks the same, but has one fewer induction variable (and therefore, one fewer register) live in the loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35592 91177308-0d34-0410-b5e6-96231b3b80d8
* print the type of an inserted IV in -debug mode.Chris Lattner2007-04-01
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35563 91177308-0d34-0410-b5e6-96231b3b80d8
* Look through bitcast when finding IVs. (Chris' patch really.)Dale Johannesen2007-03-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35347 91177308-0d34-0410-b5e6-96231b3b80d8
* do not share old induction variables when this would result in invalidDale Johannesen2007-03-20
| | | | | | | instructions (that would have to be split later) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35227 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix some VC++ warnings.Jeff Cohen2007-03-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35224 91177308-0d34-0410-b5e6-96231b3b80d8
* use types of loads and stores, not address, in CheckForIVReuseDale Johannesen2007-03-20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35197 91177308-0d34-0410-b5e6-96231b3b80d8
* Correct type info for isLegalAddressImmediate() check.Evan Cheng2007-03-13
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35086 91177308-0d34-0410-b5e6-96231b3b80d8
* Use new TargetLowering addressing modes hooks.Evan Cheng2007-03-12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35072 91177308-0d34-0410-b5e6-96231b3b80d8
* Increment iterator now because IVUseShouldUsePostIncValue may removeDevang Patel2007-03-09
| | | | | | | User from the list of I users. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35051 91177308-0d34-0410-b5e6-96231b3b80d8
* Now LoopStrengthReduce is a LoopPass.Devang Patel2007-03-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34984 91177308-0d34-0410-b5e6-96231b3b80d8
* Finally get this patch right :)Reid Spencer2007-03-02
| | | | | | | Replace expensive getZExtValue() == 0 calls with isZero() calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34861 91177308-0d34-0410-b5e6-96231b3b80d8
* Dang, I've done that twice now! Undo previous commit.Reid Spencer2007-03-02
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* Use more efficient test for one value in a ConstantInt.Reid Spencer2007-03-02
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34859 91177308-0d34-0410-b5e6-96231b3b80d8
* Reverse a premature commital.Reid Spencer2007-03-02
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34822 91177308-0d34-0410-b5e6-96231b3b80d8
* Prefer non-virtual calls to ConstantInt::isZero over virtual calls toReid Spencer2007-03-02
| | | | | | | Constant::isNullValue() in situations where it is possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34821 91177308-0d34-0410-b5e6-96231b3b80d8
* Privatize StructLayout::MemberOffsets, adding an accessorChris Lattner2007-02-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34156 91177308-0d34-0410-b5e6-96231b3b80d8
* Apply the VISIBILITY_HIDDEN field to the remaining anonymous classes inReid Spencer2007-02-05
| | | | | | | | the Transforms library. This reduces debug library size by 132 KB, debug binary size by 376 KB, and reduces link time for llvm tools slightly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33939 91177308-0d34-0410-b5e6-96231b3b80d8
* rename Type::isIntegral to Type::isInteger, eliminating the old Type::isInteger.Chris Lattner2007-01-15
| | | | | | | | | | rename Type::getIntegralTypeMask to Type::getIntegerTypeMask. This makes naming much more consistent. For example, there are now no longer any instances of IntegerType that are not considered isInteger! :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33225 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate calls to isInteger, generalizing code and tightening checks as needed.Chris Lattner2007-01-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33218 91177308-0d34-0410-b5e6-96231b3b80d8
* For PR1097:Reid Spencer2007-01-08
| | | | | | | | | Enable complex addressing modes on 64-bit platforms involving two induction variables by keeping a size and scale in 64-bits not 32. Patch by Dan Gohman. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33011 91177308-0d34-0410-b5e6-96231b3b80d8
* no need to worry about int vs uint any more.Chris Lattner2007-01-06
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32946 91177308-0d34-0410-b5e6-96231b3b80d8
* For PR950:Reid Spencer2006-12-31
| | | | | | | | | | | | | | This patch replaces signed integer types with signless ones: 1. [US]Byte -> Int8 2. [U]Short -> Int16 3. [U]Int -> Int32 4. [U]Long -> Int64. 5. Removal of isSigned, isUnsigned, getSignedVersion, getUnsignedVersion and other methods related to signedness. In a few places this warranted identifying the signedness information from other sources. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32785 91177308-0d34-0410-b5e6-96231b3b80d8
* For PR950:Reid Spencer2006-12-23
| | | | | | | | | This patch removes the SetCC instructions and replaces them with the ICmp and FCmp instructions. The SetCondInst instruction has been removed and been replaced with ICmpInst and FCmpInst. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32751 91177308-0d34-0410-b5e6-96231b3b80d8
* Switch over Transforms/Scalar to use the STATISTIC macro. For each statisticChris Lattner2006-12-19
| | | | | | | | converted, we lose a static initializer. This also allows GCC to emit warnings about unused statistics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32690 91177308-0d34-0410-b5e6-96231b3b80d8
* Change the interface to SCEVExpander::InsertCastOfTo to take a cast opcodeReid Spencer2006-12-13
| | | | | | | | so the decision of which opcode to use is pushed upward to the caller. Adjust the callers to pass the expected opcode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32535 91177308-0d34-0410-b5e6-96231b3b80d8
* Change inferred getCast into specific getCast. Passes all tests.Reid Spencer2006-12-12
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* Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, areBill Wendling2006-12-07
| | | | | | | now cerr, cout, and NullStream resp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32298 91177308-0d34-0410-b5e6-96231b3b80d8
* Detemplatize the Statistic class. The only type it is instantiated withChris Lattner2006-12-06
| | | | | | | is 'unsigned'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32279 91177308-0d34-0410-b5e6-96231b3b80d8
* For PR950:Reid Spencer2006-11-27
| | | | | | | | | | | The long awaited CAST patch. This introduces 12 new instructions into LLVM to replace the cast instruction. Corresponding changes throughout LLVM are provided. This passes llvm-test, llvm/test, and SPEC CPUINT2000 with the exception of 175.vpr which fails only on a slight floating point output difference. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31931 91177308-0d34-0410-b5e6-96231b3b80d8
* Removed #include <iostream> and replaced with llvm_* streams.Bill Wendling2006-11-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31923 91177308-0d34-0410-b5e6-96231b3b80d8
* If an indvar with a variable stride is used by the exit condition, go aheadChris Lattner2006-11-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | and handle it like constant stride vars. This fixes some bad codegen in variable stride cases. For example, it compiles this: void foo(int k, int i) { for (k=i+i; k <= 8192; k+=i) flags2[k] = 0; } to: LBB1_1: #bb.preheader movl %eax, %ecx addl %ecx, %ecx movl L_flags2$non_lazy_ptr, %edx LBB1_2: #bb movb $0, (%edx,%ecx) addl %eax, %ecx cmpl $8192, %ecx jle LBB1_2 #bb LBB1_5: #return ret or (if the array is local and we are in dynamic-nonpic or static mode): LBB3_2: #bb movb $0, _flags2(%ecx) addl %eax, %ecx cmpl $8192, %ecx jle LBB3_2 #bb and: lis r2, ha16(L_flags2$non_lazy_ptr) lwz r2, lo16(L_flags2$non_lazy_ptr)(r2) slwi r3, r4, 1 LBB1_2: ;bb li r5, 0 add r6, r4, r3 stbx r5, r2, r3 cmpwi cr0, r6, 8192 bgt cr0, LBB1_5 ;return instead of: leal (%eax,%eax,2), %ecx movl %eax, %edx addl %edx, %edx addl L_flags2$non_lazy_ptr, %edx xorl %esi, %esi LBB1_2: #bb movb $0, (%edx,%esi) movl %eax, %edi addl %esi, %edi addl %ecx, %esi cmpl $8192, %esi jg LBB1_5 #return and: lis r2, ha16(L_flags2$non_lazy_ptr) lwz r2, lo16(L_flags2$non_lazy_ptr)(r2) mulli r3, r4, 3 slwi r5, r4, 1 li r6, 0 add r2, r2, r5 LBB1_2: ;bb li r5, 0 add r7, r3, r6 stbx r5, r2, r6 add r6, r4, r6 cmpwi cr0, r7, 8192 ble cr0, LBB1_2 ;bb This speeds up Benchmarks/Shootout/sieve from 8.533s to 6.464s and implements LoopStrengthReduce/var_stride_used_by_compare.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31809 91177308-0d34-0410-b5e6-96231b3b80d8
* For PR786:Reid Spencer2006-11-02
| | | | | | | | | | | Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting fall out by removing unused variables. Remaining warnings have to do with unused functions (I didn't want to delete code without review) and unused variables in generated code. Maintainers should clean up the remaining issues when they see them. All changes pass DejaGnu tests and Olden. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31380 91177308-0d34-0410-b5e6-96231b3b80d8
* break edges more intelligentlyChris Lattner2006-10-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31257 91177308-0d34-0410-b5e6-96231b3b80d8
* prepare for a change I'm about to makeChris Lattner2006-10-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31248 91177308-0d34-0410-b5e6-96231b3b80d8
* For PR950:Reid Spencer2006-10-20
| | | | | | | | | This patch implements the first increment for the Signless Types feature. All changes pertain to removing the ConstantSInt and ConstantUInt classes in favor of just using ConstantInt. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31063 91177308-0d34-0410-b5e6-96231b3b80d8
* eliminate RegisterOpt. It does the same thing as RegisterPass.Chris Lattner2006-08-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29925 91177308-0d34-0410-b5e6-96231b3b80d8
* s|llvm/Support/Visibility.h|llvm/Support/Compiler.h|Chris Lattner2006-08-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29911 91177308-0d34-0410-b5e6-96231b3b80d8
* Changes:Chris Lattner2006-08-03
| | | | | | | | | | | | | | | | 1. Update an obsolete comment. 2. Make the sorting by base an explicit (though still N^2) step, so that the code is more clear on what it is doing. 3. Partition uses so that uses inside the loop are handled before uses outside the loop. Note that none of these changes currently changes the code inserted by LSR, but they are a stepping stone to getting there. This code is the result of some crazy pair programming with Nate. :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29493 91177308-0d34-0410-b5e6-96231b3b80d8
* Only reuse a previous IV if it would not require a type conversion.Evan Cheng2006-07-18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29186 91177308-0d34-0410-b5e6-96231b3b80d8
* Use hidden visibility to make symbols in an anonymous namespace getChris Lattner2006-06-28
| | | | | | | dropped. This shrinks libllvmgcc.dylib another 67K git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28975 91177308-0d34-0410-b5e6-96231b3b80d8
* RewriteExpr, either the new PHI node of induction variable or theEvan Cheng2006-06-09
| | | | | | | | | post-increment value, should be first cast to the appropriated type (to the type of the common expr). Otherwise, the rewrite of a use based on (common + iv) may end up with an incorrect type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28735 91177308-0d34-0410-b5e6-96231b3b80d8
* Get rid of a signed/unsigned compare warning.Reid Spencer2006-04-12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27625 91177308-0d34-0410-b5e6-96231b3b80d8
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