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* This patch makes medium code model the default for 64-bit PowerPC ELF.Bill Schmidt2012-11-27
| | | | | | | | | | | When the CodeGenInfo is to be created for the PPC64 target machine, a default code-model selection is converted to CodeModel::Medium provided we are not targeting the Darwin OS. Defaults for Darwin are unaffected. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168747 91177308-0d34-0410-b5e6-96231b3b80d8
* Attempt to make the comments for dwarf debug look more likeEric Christopher2012-11-27
| | | | | | the coding standard would like. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168737 91177308-0d34-0410-b5e6-96231b3b80d8
* Reapply section moving, make sure string section is output last.Eric Christopher2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168736 91177308-0d34-0410-b5e6-96231b3b80d8
* [arm fast-isel] Appease the machine verifier by using the proper registerChad Rosier2012-11-27
| | | | | | | | | | classes. The vast majority of the remaining issues are due to uses of invalid registers, which are defined by getRegForValue(). Those will be a little more challenging to cleanup. rdar://12719844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168735 91177308-0d34-0410-b5e6-96231b3b80d8
* [arm fast-isel] Appease the machine verifier by using the proper registerChad Rosier2012-11-27
| | | | | | | | classes. rdar://12719844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168733 91177308-0d34-0410-b5e6-96231b3b80d8
* [arm fast-isel] Appease the machine verifier by using the proper registerChad Rosier2012-11-27
| | | | | | | | classes. Also a bit of cleanup. rdar://12719844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168728 91177308-0d34-0410-b5e6-96231b3b80d8
* Moving SectionMemoryManager into RuntimeDyld and adding unit tests for it.Andrew Kaylor2012-11-27
| | | | | | | | The SectionMemoryManager now supports (and requires) applying section-specific page permissions. Clients using this memory manager must call either MCJIT::finalizeObject() or SectionMemoryManager::applyPermissions() before executing JITed code. See r168718 for changes from the previous implementation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168721 91177308-0d34-0410-b5e6-96231b3b80d8
* Modified depends() to recognize that when all levels are "=" andPreston Briggs2012-11-27
| | | | | | | | | | there's no possible loo-independent dependence, then there's no dependence. Updated all test result appropriately. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168719 91177308-0d34-0410-b5e6-96231b3b80d8
* CSE: allow PerformTrivialCoalescing to check copies across basic blockManman Ren2012-11-27
| | | | | | | | | | | | | | | | | boundaries. Given the following case: BB0 %vreg1<def> = SUBrr %vreg0, %vreg7 %vreg2<def> = COPY %vreg7 BB1 %vreg10<def> = SUBrr %vreg0, %vreg2 We should be able to CSE between SUBrr in BB0 and SUBrr in BB1. rdar://12462006 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168717 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Don't replace all uses for instructions with no usesMeador Inge2012-11-27
| | | | | | | | | | | | | | | | | | | | | | | | | | My commit to migrate the printf simplifiers from the simplify-libcalls in r168604 introduced a regression reported by Duncan [1]. The problem is that in some cases the library call simplifier can return a new value that has no uses and the new value's type is different than the old value's type (which is fine because there are no uses). The specific case that triggered the bug looked something like: declare void @printf(i8*, ...) ... call void (i8*, ...)* @printf(i8* %fmt) Which we want to optimized into: call i32 @putchar(i32 104) However, the code was attempting to replace all uses of the printf with the putchar and the types differ, hence a crash. This is fixed by *just* deleting the original instruction when there are no uses. The old simplify-libcalls pass is already doing something similar. [1] http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-November/056338.html git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168716 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove duplicated #includes.Jakub Staszak2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168712 91177308-0d34-0410-b5e6-96231b3b80d8
* SCEV: Even if the latch terminator is foldable we can't deduce the result of ↵Benjamin Kramer2012-11-27
| | | | | | | | an unrelated condition with it. Fixes PR14432. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168711 91177308-0d34-0410-b5e6-96231b3b80d8
* X86: do not fold load instructions such as [V]MOVS[S|D] to other instructionsManman Ren2012-11-27
| | | | | | | | | | | | when the destination register is wider than the memory load. These load instructions load from m32 or m64 and set the upper bits to zero, while the folded instructions may accept m128. rdar://12721174 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168710 91177308-0d34-0410-b5e6-96231b3b80d8
* This patch implements medium code model support for 64-bit PowerPC.Bill Schmidt2012-11-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The default for 64-bit PowerPC is small code model, in which TOC entries must be addressable using a 16-bit offset from the TOC pointer. Additionally, only TOC entries are addressed via the TOC pointer. With medium code model, TOC entries and data sections can all be addressed via the TOC pointer using a 32-bit offset. Cooperation with the linker allows 16-bit offsets to be used when these are sufficient, reducing the number of extra instructions that need to be executed. Medium code model also does not generate explicit TOC entries in ".section toc" for variables that are wholly internal to the compilation unit. Consider a load of an external 4-byte integer. With small code model, the compiler generates: ld 3, .LC1@toc(2) lwz 4, 0(3) .section .toc,"aw",@progbits .LC1: .tc ei[TC],ei With medium model, it instead generates: addis 3, 2, .LC1@toc@ha ld 3, .LC1@toc@l(3) lwz 4, 0(3) .section .toc,"aw",@progbits .LC1: .tc ei[TC],ei Here .LC1@toc@ha is a relocation requesting the upper 16 bits of the 32-bit offset of ei's TOC entry from the TOC base pointer. Similarly, .LC1@toc@l is a relocation requesting the lower 16 bits. Note that if the linker determines that ei's TOC entry is within a 16-bit offset of the TOC base pointer, it will replace the "addis" with a "nop", and replace the "ld" with the identical "ld" instruction from the small code model example. Consider next a load of a function-scope static integer. For small code model, the compiler generates: ld 3, .LC1@toc(2) lwz 4, 0(3) .section .toc,"aw",@progbits .LC1: .tc test_fn_static.si[TC],test_fn_static.si .type test_fn_static.si,@object .local test_fn_static.si .comm test_fn_static.si,4,4 For medium code model, the compiler generates: addis 3, 2, test_fn_static.si@toc@ha addi 3, 3, test_fn_static.si@toc@l lwz 4, 0(3) .type test_fn_static.si,@object .local test_fn_static.si .comm test_fn_static.si,4,4 Again, the linker may replace the "addis" with a "nop", calculating only a 16-bit offset when this is sufficient. Note that it would be more efficient for the compiler to generate: addis 3, 2, test_fn_static.si@toc@ha lwz 4, test_fn_static.si@toc@l(3) The current patch does not perform this optimization yet. This will be addressed as a peephole optimization in a later patch. For the moment, the default code model for 64-bit PowerPC will remain the small code model. We plan to eventually change the default to medium code model, which matches current upstream GCC behavior. Note that the different code models are ABI-compatible, so code compiled with different models will be linked and execute correctly. I've tested the regression suite and the application/benchmark test suite in two ways: Once with the patch as submitted here, and once with additional logic to force medium code model as the default. The tests all compile cleanly, with one exception. The mandel-2 application test fails due to an unrelated ABI compatibility with passing complex numbers. It just so happens that small code model was incredibly lucky, in that temporary values in floating-point registers held the expected values needed by the external library routine that was called incorrectly. My current thought is to correct the ABI problems with _Complex before making medium code model the default, to avoid introducing this "regression." Here are a few comments on how the patch works, since the selection code can be difficult to follow: The existing logic for small code model defines three pseudo-instructions: LDtoc for most uses, LDtocJTI for jump table addresses, and LDtocCPT for constant pool addresses. These are expanded by SelectCodeCommon(). The pseudo-instruction approach doesn't work for medium code model, because we need to generate two instructions when we match the same pattern. Instead, new logic in PPCDAGToDAGISel::Select() intercepts the TOC_ENTRY node for medium code model, and generates an ADDIStocHA followed by either a LDtocL or an ADDItocL. These new node types correspond naturally to the sequences described above. The addis/ld sequence is generated for the following cases: * Jump table addresses * Function addresses * External global variables * Tentative definitions of global variables (common linkage) The addis/addi sequence is generated for the following cases: * Constant pool entries * File-scope static global variables * Function-scope static variables Expanding to the two-instruction sequences at select time exposes the instructions to subsequent optimization, particularly scheduling. The rest of the processing occurs at assembly time, in PPCAsmPrinter::EmitInstruction. Each of the instructions is converted to a "real" PowerPC instruction. When a TOC entry needs to be created, this is done here in the same manner as for the existing LDtoc, LDtocJTI, and LDtocCPT pseudo-instructions (I factored out a new routine to handle this). I had originally thought that if a TOC entry was needed for LDtocL or ADDItocL, it would already have been generated for the previous ADDIStocHA. However, at higher optimization levels, the ADDIStocHA may appear in a different block, which may be assembled textually following the block containing the LDtocL or ADDItocL. So it is necessary to include the possibility of creating a new TOC entry for those two instructions. Note that for LDtocL, we generate a new form of LD called LDrs. This allows specifying the @toc@l relocation for the offset field of the LD instruction (i.e., the offset is replaced by a SymbolLo relocation). When the peephole optimization described above is added, we will need to do similar things for all immediate-form load and store operations. The seven "mcm-n.ll" test cases are kept separate because otherwise the intermingling of various TOC entries and so forth makes the tests fragile and hard to understand. The above assumes use of an external assembler. For use of the integrated assembler, new relocations are added and used by PPCELFObjectWriter. Testing is done with "mcm-obj.ll", which tests for proper generation of the various relocations for the same sequences tested with the external assembler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168708 91177308-0d34-0410-b5e6-96231b3b80d8
* Never use .lcomm on platforms where it does not accept an alignmentUlrich Weigand2012-11-27
| | | | | | | | | | | | argument. Instead, use a pair of .local and .comm directives. This avoids spurious differences between binaries built by the integrated assembler vs. those built by the external assembler, since the external assembler may impose alignment requirements on .lcomm symbols where the integrated assembler does not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168704 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the dependent libraries feature.Bill Wendling2012-11-27
| | | | | | | The dependent libraries feature was never used and has bit-rotted. Remove it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168694 91177308-0d34-0410-b5e6-96231b3b80d8
* tsan: instrument atomic nand operationDmitry Vyukov2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168684 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert rearrangement of debug info sections to unblock the botsEric Christopher2012-11-27
| | | | | | and O0 + debug codegen. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168680 91177308-0d34-0410-b5e6-96231b3b80d8
* Modify depends(Src, Dst, PossiblyLoopIndependent).Preston Briggs2012-11-27
| | | | | | | | | | | If the Src and Dst are the same instruction, no loop-independent dependence is possible, so we force the PossiblyLoopIndependent flag to false. The test case results are updated appropriately. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168678 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Migrate sprintf optimizationsMeador Inge2012-11-27
| | | | | | | This patch migrates the sprintf optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168677 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unneeded #include.Jakub Staszak2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168670 91177308-0d34-0410-b5e6-96231b3b80d8
* The section is .debug_line.Eric Christopher2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168666 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unneeded #include.Jakub Staszak2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168664 91177308-0d34-0410-b5e6-96231b3b80d8
* llvm/CodeGen: Remove empty files in r168659.NAKAMURA Takumi2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168663 91177308-0d34-0410-b5e6-96231b3b80d8
* Code pretificationJoe Abbey2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168661 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused forward declaration.Jakub Staszak2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168660 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unused MachineLoopRanges analysis.Jakub Staszak2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168659 91177308-0d34-0410-b5e6-96231b3b80d8
* [arm fast-isel] Appease the machine verifier by using the proper registerChad Rosier2012-11-27
| | | | | | | | classes. The associated test case still doesn't pass, but it does have far fewer issues. rdar://12719844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168657 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r168635 "Step towards implementation of pass manager with ↵Owen Anderson2012-11-27
| | | | | | | | | doInitialization and doFinalization per module detangled from runOn?? calls, still has temporary code not to break ASAN to be removed when that pass conforms to the proposed model". It appears to have broken at least one buildbot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168654 91177308-0d34-0410-b5e6-96231b3b80d8
* Fast-math optimization: fold multiply by zeroMichael Ilseman2012-11-27
| | | | | | | | Added in first optimization using fast-math flags to serve as an example for following optimizations. SimplifyInstruction will now try to optimize an fmul observing its FastMathFlags to see if it can fold multiply by zero when 'nnan' and 'nsz' flags are set. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168648 91177308-0d34-0410-b5e6-96231b3b80d8
* Fast-math flags for the bitcodeMichael Ilseman2012-11-27
| | | | | | | | Added in bitcode enum for the serializing of fast-math flags. Added in the reading/writing of fast-math flags from the OptimizationFlags record for BinaryOps. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168646 91177308-0d34-0410-b5e6-96231b3b80d8
* Fast-math flags for LLVM IR parsing and printingMichael Ilseman2012-11-27
| | | | | | | | Added in the ability to read LLVM IR text that contains fast-math flags as a sequence of capital letters separated by spaces in any order. Added in the printing of the fast-math flags in a canonical order, and don't print the other flags when 'fast' is specified, as 'fast' implies all the others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168645 91177308-0d34-0410-b5e6-96231b3b80d8
* Make comment names match function names.Eric Christopher2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168644 91177308-0d34-0410-b5e6-96231b3b80d8
* Add in sections for the fission case (no change so incorrect) andEric Christopher2012-11-27
| | | | | | add a TODO for starting. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168643 91177308-0d34-0410-b5e6-96231b3b80d8
* Fast-math interfaces for InstructionsMichael Ilseman2012-11-27
| | | | | | | | Add in getter/setter methods for Instructions, allowing them to be the interface to FPMathOperator similarly to now NUS/NSW is handled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168642 91177308-0d34-0410-b5e6-96231b3b80d8
* Reorder section output ordering.Eric Christopher2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168638 91177308-0d34-0410-b5e6-96231b3b80d8
* Whitespace cleanup.Eric Christopher2012-11-27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168637 91177308-0d34-0410-b5e6-96231b3b80d8
* Step towards implementation of pass manager with doInitialization and ↵Owen Anderson2012-11-26
| | | | | | | | | doFinalization per module detangled from runOn?? calls, still has temporary code not to break ASAN to be removed when that pass conforms to the proposed model Patch by Pedro Artigas, with feedback from by Chandler Carruth. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168635 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an assertion to ensure freezeReservedRegs() is only ever called once.Chad Rosier2012-11-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168633 91177308-0d34-0410-b5e6-96231b3b80d8
* Now that the X86 Maximal Stack Alignment Check pass has been removed (i.e.,Chad Rosier2012-11-26
| | | | | | | | | r168627), we no longer need to call the freezeReservedRegs() function a second time. Previously, this pass was conservatively adding the FP to the set of reserved registers, requiring the second update to the reserved registers. rdar://12719844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168631 91177308-0d34-0410-b5e6-96231b3b80d8
* Now that the X86 Maximal Stack Alignment Check pass has been removed (i.e.,Chad Rosier2012-11-26
| | | | | | | | | r168627), we no longer need to call the freezeReservedRegs() function a second time. Previously, this pass was conservatively adding the FP to the set of reserved registers, requiring the second update to the reserved registers. rdar://12719844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168630 91177308-0d34-0410-b5e6-96231b3b80d8
* Get rid of the getPointeeAlignment helper function fromEli Friedman2012-11-26
| | | | | | | | | | InstCombineLoadStoreAlloca.cpp, which had many issues. (At least two bugs were noted on llvm-commits, and it was overly conservative.) Instead, use getOrEnforceKnownAlignment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168629 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove the X86 Maximal Stack Alignment Check pass as it is no longer necessary.Chad Rosier2012-11-26
| | | | | | | | | | | | | | | This pass was conservative in that it always reserved the FP to enable dynamic stack realignment, which allowed the RA to use aligned spills for vector registers. This happens even when spills were not necessary. The RA has since been improved to use unaligned spills when necessary. The new behavior is to realign the stack if the frame pointer was already reserved for some other reason, but don't reserve the frame pointer just because a function contains vector virtual registers. Part of rdar://12719844 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168627 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't use iterator after being erased.Jakub Staszak2012-11-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168622 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix comments in HexagonOperands.td.Jyotsna Verma2012-11-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168617 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
* Remove unneeded #includes.Jakub Staszak2012-11-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168608 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix a comment bug in toascii simplifierMeador Inge2012-11-26
| | | | | | | When I migrated the toascii simplifier in r168580 Benjamin Kramer noticed a bug in one of the comments that I migrated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168605 91177308-0d34-0410-b5e6-96231b3b80d8
* instcombine: Migrate printf optimizationsMeador Inge2012-11-26
| | | | | | | This patch migrates the printf optimizations from the simplify-libcalls pass into the instcombine library call simplifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168604 91177308-0d34-0410-b5e6-96231b3b80d8
* Move the code that uses SCEVs prior to creating the new loops. Nadav Rotem2012-11-26
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168601 91177308-0d34-0410-b5e6-96231b3b80d8
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