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path: root/lib/Target/X86/X86FrameLowering.cpp
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* Re-apply r211399, "Generate native unwind info on Win64" with a fix to ↵NAKAMURA Takumi2014-06-25
| | | | | | | | | | | | | | | | | | | | | | | ignore SEH pseudo ops in X86 JIT emitter. -- This patch enables LLVM to emit Win64-native unwind info rather than DWARF CFI. It handles all corner cases (I hope), including stack realignment. Because the unwind info is not flexible enough to describe stack frames with a gap of unknown size in the middle, such as the one caused by stack realignment, I modified register spilling code to place all spills into the fixed frame slots, so that they can be accessed relative to the frame pointer. Patch by Vadim Chugunov! Reviewed By: rnk Differential Revision: http://reviews.llvm.org/D4081 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211691 91177308-0d34-0410-b5e6-96231b3b80d8
* Reformat.NAKAMURA Takumi2014-06-25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211689 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r211399, "Generate native unwind info on Win64"NAKAMURA Takumi2014-06-22
| | | | | | It broke Legacy JIT Tests on x86_64-{mingw32|msvc}, aka Windows x64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211480 91177308-0d34-0410-b5e6-96231b3b80d8
* Generate native unwind info on Win64Reid Kleckner2014-06-20
| | | | | | | | | | | | | | | | | | | | This patch enables LLVM to emit Win64-native unwind info rather than DWARF CFI. It handles all corner cases (I hope), including stack realignment. Because the unwind info is not flexible enough to describe stack frames with a gap of unknown size in the middle, such as the one caused by stack realignment, I modified register spilling code to place all spills into the fixed frame slots, so that they can be accessed relative to the frame pointer. Patch by Vadim Chugunov! Reviewed By: rnk Differential Revision: http://reviews.llvm.org/D4081 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211399 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove caching of the subtarget for X86FrameLowering.Eric Christopher2014-06-05
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210290 91177308-0d34-0410-b5e6-96231b3b80d8
* We've got a getSlotSize call already that we use everywhere else,Eric Christopher2014-06-05
| | | | | | use it here too. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210227 91177308-0d34-0410-b5e6-96231b3b80d8
* 80-columns.Eric Christopher2014-06-05
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210224 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove uses of the TargetMachine from X86FrameLowering.Eric Christopher2014-06-05
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210223 91177308-0d34-0410-b5e6-96231b3b80d8
* Segmented stacks: omit __morestack call when there's no frame.Tim Northover2014-05-22
| | | | | | Patch by Florian Zeitz git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209436 91177308-0d34-0410-b5e6-96231b3b80d8
* None of these targets actually define their own CFI_INSTRUCTIONEric Christopher2014-04-29
| | | | | | | opcode so there's no reason to use the target namespace for it rather than TargetOpcode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207475 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix 80-columns, tab characters, and comments.Eric Christopher2014-04-29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207472 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++] Use 'nullptr'. Target edition.Craig Topper2014-04-25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207197 91177308-0d34-0410-b5e6-96231b3b80d8
* Move the segmented stack switch to a function attributeReid Kleckner2014-04-10
| | | | | | | | | This removes the -segmented-stacks command line flag in favor of a per-function "split-stack" attribute. Patch by Luqman Aden and Alex Crichton! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205997 91177308-0d34-0410-b5e6-96231b3b80d8
* Support segmented stacks on Win64Reid Kleckner2014-04-01
| | | | | | | Identical to Win32 method except the GS segment register is used for TLS instead of FS and pvArbitrary is at TEB offset 0x28 instead of 0x14. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205342 91177308-0d34-0410-b5e6-96231b3b80d8
* Phase 2 of the great MachineRegisterInfo cleanup. This time, we're changingOwen Anderson2014-03-13
| | | | | | | | | | | operator* on the by-operand iterators to return a MachineOperand& rather than a MachineInstr&. At this point they almost behave like normal iterators! Again, this requires making some existing loops more verbose, but should pave the way for the big range-based for-loop cleanups in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203865 91177308-0d34-0410-b5e6-96231b3b80d8
* Replace PROLOG_LABEL with a new CFI_INSTRUCTION.Rafael Espindola2014-03-07
| | | | | | | | | | | | | | | | | | | | | | | The old system was fairly convoluted: * A temporary label was created. * A single PROLOG_LABEL was created with it. * A few MCCFIInstructions were created with the same label. The semantics were that the cfi instructions were mapped to the PROLOG_LABEL via the temporary label. The output position was that of the PROLOG_LABEL. The temporary label itself was used only for doing the mapping. The new CFI_INSTRUCTION has a 1:1 mapping to MCCFIInstructions and points to one by holding an index into the CFI instructions of this function. I did consider removing MMI.getFrameInstructions completelly and having CFI_INSTRUCTION own a MCCFIInstruction, but MCCFIInstructions have non trivial constructors and destructors and are somewhat big, so the this setup is probably better. The net result is that we don't create temporary labels that are never used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203204 91177308-0d34-0410-b5e6-96231b3b80d8
* [C++11] Replace llvm::next and llvm::prior with std::next and std::prev.Benjamin Kramer2014-03-02
| | | | | | Remove the old functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202636 91177308-0d34-0410-b5e6-96231b3b80d8
* [x86] Fix retq/retl handling in 64-bit modeDavid Woodhouse2014-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | This finishes the job started in r198756, and creates separate opcodes for 64-bit vs. 32-bit versions of the rest of the RET instructions too. LRETL/LRETQ are interesting... I can't see any justification for their existence in the SDM. There should be no 'LRETL' in 64-bit mode, and no need for a REX.W prefix for LRETQ. But this is what GAS does, and my Sandybridge CPU and an Opteron 6376 concur when tested as follows: asm __volatile__("pushq $0x1234\nmovq $0x33,%rax\nsalq $32,%rax\norq $1f,%rax\npushq %rax\nlretl $8\n1:"); asm __volatile__("pushq $1234\npushq $0x33\npushq $1f\nlretq $8\n1:"); asm __volatile__("pushq $0x33\npushq $1f\nlretq\n1:"); asm __volatile__("pushq $0x1234\npushq $0x33\npushq $1f\nlretq $8\n1:"); cf. PR8592 and commit r118903, which added LRETQ. I only added LRETIQ to match it. I don't quite understand how the Intel syntax parsing for ret instructions is working, despite r154468 allegedly fixing it. Aren't the explicitly sized 'retw', 'retd' and 'retq' supposed to work? I have at least made the 'lretq' work with (and indeed *require*) the 'q'. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199106 91177308-0d34-0410-b5e6-96231b3b80d8
* [x86] Disambiguate RET[QL] and fix aliases for 16-bit modeDavid Woodhouse2014-01-08
| | | | | | | | | | I couldn't see how to do this sanely without splitting RETQ from RETL. Eric says: "sad about the inability to roundtrip them now, but...". I have no idea what that means, but perhaps it wants preserving in the commit comment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198756 91177308-0d34-0410-b5e6-96231b3b80d8
* Change stack probing code for MingW.Kai Nacke2013-12-13
| | | | | | | | | Since gcc 4.6 the compiler uses ___chkstk_ms which has the same semantics as the MS CRT function __chkstk. This simplifies the prologue generation a bit. Reviewed by Rafael Espíndola. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197205 91177308-0d34-0410-b5e6-96231b3b80d8
* Reland "Fix miscompile of MS inline assembly with stack realignment"Reid Kleckner2013-12-10
| | | | | | | | | | | This re-lands commit r196876, which was reverted in r196879. The tests have been fixed to pass on platforms with a stack alignment larger than 4. Update to clang side tests will land shortly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196939 91177308-0d34-0410-b5e6-96231b3b80d8
* Make Triple's isOSBinFormatXXX functions partition triple-space.Tim Northover2013-12-10
| | | | | | | | | | | Most users would be surprised if "isCOFF" and "isMachO" were simultaneously true, unless they'd put the compiler in a box with a gun attached to a photon detector. This makes sure precisely one of the three formats is true for any triple and simplifies some target logic based on that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196934 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Fix miscompile of MS inline assembly with stack realignment"Reid Kleckner2013-12-10
| | | | | | | This reverts commit r196876. Its tests failed on the bots, so I'll figure it out tomorrow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196879 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix miscompile of MS inline assembly with stack realignmentReid Kleckner2013-12-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | For stack frames requiring realignment, three pointers may be needed: - ebp to address incoming arguments - esi (could be any callee-saved register) to address locals - esp to address outgoing arguments We would use esi unconditionally without verifying that it did not conflict with inline assembly. This change doesn't do the verification, it simply emits a fatal error on functions that use stack realignment, dynamic SP adjustments, and inline assembly. Because stack realignment is common on Windows, we also no longer assume that MS inline assembly clobbers esp. Instead, we analyze the inline instructions for implicit definitions and check if esp is there. If so, we require the use of a base pointer and consider it in the condition above. Mostly fixes PR16830, but we could try harder to find a non-conflicting base pointer. Reviewers: sunfish Differential Revision: http://llvm-reviews.chandlerc.com/D1317 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196876 91177308-0d34-0410-b5e6-96231b3b80d8
* (this is a corrected patch)Yaron Keren2013-10-23
| | | | | | | | | | | | | | | | Calling _chkstk is required on ELF as well as COFF on Windows. Without _chkstk, functions requiring large stack crash in initialization code. Previous code tested for COFF format but not Mach-O and this patch modifies the code to test for Windows OS (both Windows target and MingW target) but not Mach-O object format: Looks like macho environment was used to build some EFI code. Credits to Andrew MacPherson. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193289 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Calling _chkstk is required on ELF as well as COFF on Windows. ↵Rafael Espindola2013-10-23
| | | | | | | | | | Without _chkstk functions requiring large stack crash in initialization code. Previous code tested for COFF format but not Mach-O and this patch modifies the code to test for Windows." This reverts commit r193263. It is causing CodeGen/X86/mingw-alloca.ll to fail. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193275 91177308-0d34-0410-b5e6-96231b3b80d8
* Calling _chkstk is required on ELF as well as COFF on Windows. Yaron Keren2013-10-23
| | | | | | | | | | | | Without _chkstk functions requiring large stack crash in initialization code. Previous code tested for COFF format but not Mach-O and this patch modifies the code to test for Windows. Credits to Andrew MacPherson. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193263 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r190366. It was breaking build bots.Bill Wendling2013-09-10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190373 91177308-0d34-0410-b5e6-96231b3b80d8
* Use a default value for the prologue's debug location.Bill Wendling2013-09-09
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190366 91177308-0d34-0410-b5e6-96231b3b80d8
* Generate compact unwind encoding from CFI directives.Bill Wendling2013-09-09
| | | | | | | | | | | | | | | | We used to generate the compact unwind encoding from the machine instructions. However, this had the problem that if the user used `-save-temps' or compiled their hand-written `.s' file (with CFI directives), we wouldn't generate the compact unwind encoding. Move the algorithm that generates the compact unwind encoding into the MCAsmBackend. This way we can generate the encoding whether the code is from a `.ll' or `.s' file. <rdar://problem/13623355> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190290 91177308-0d34-0410-b5e6-96231b3b80d8
* WIP: Refactor some code so that it can be called by more than just one ↵Bill Wendling2013-09-03
| | | | | | method. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189849 91177308-0d34-0410-b5e6-96231b3b80d8
* Constify the function parameters.Bill Wendling2013-08-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188469 91177308-0d34-0410-b5e6-96231b3b80d8
* X86: correct tail return address calculationTim Northover2013-08-04
| | | | | | | | | | | Due to the weird and wondeful usual arithmetic conversions, some calculations involving negative values were getting performed in uint32_t and then promoted to int64_t, which is really not a good idea. Patch by Katsuhiro Ueno. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187703 91177308-0d34-0410-b5e6-96231b3b80d8
* Reuse %rax after calling __chkstk on win64Nico Rieck2013-07-08
| | | | | | Reapply this as I reverted the wrong commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185807 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert "Reuse %rax after calling __chkstk on win64"Nico Rieck2013-07-08
| | | | | | This reverts commit 01f8d579f7672872324208ac5bc4ac311e81b22e. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185781 91177308-0d34-0410-b5e6-96231b3b80d8
* Reuse %rax after calling __chkstk on win64Nico Rieck2013-07-07
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185778 91177308-0d34-0410-b5e6-96231b3b80d8
* Use pointers to the MCAsmInfo and MCRegInfo.Bill Wendling2013-06-18
| | | | | | | | | | Someone may want to do something crazy, like replace these objects if they change or something. No functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184175 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove addFrameMove.Rafael Espindola2013-05-16
| | | | | | | Now that we have good testing, remove addFrameMove and create cfi instructions directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182052 91177308-0d34-0410-b5e6-96231b3b80d8
* Delete dead code.Rafael Espindola2013-05-16
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181982 91177308-0d34-0410-b5e6-96231b3b80d8
* Delete dead code.Rafael Espindola2013-05-15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181941 91177308-0d34-0410-b5e6-96231b3b80d8
* Change getFrameMoves to return a const reference.Rafael Espindola2013-05-11
| | | | | | | To add a frame now there is a dedicated addFrameMove which also takes care of constructing the move itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181657 91177308-0d34-0410-b5e6-96231b3b80d8
* Generate a compact unwind encoding in the face of a stack alignment push.Bill Wendling2013-05-09
| | | | | | | | | | | | | | We generate a `push' of a random register (%rax) if the stack needs to be aligned by the size of that register. However, this could mess up compact unwind generation. In particular, we want to still generate compact unwind in the presence of this monstrosity. Check if the push of of the %rax/%eax register. If it is and it's marked with the `FrameSetup' flag, then we can generate a compact unwind encoding for the function only if the push is the last FrameSetup instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181540 91177308-0d34-0410-b5e6-96231b3b80d8
* Simplify the code a bit.Bill Wendling2013-05-09
| | | | | | | | | | | The compact unwind registers were defined in two different places. It's better just to place them in the function that uses them and specify that this is a 64-bit or 32-bit machine. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181529 91177308-0d34-0410-b5e6-96231b3b80d8
* Use an enum instead of magic constants to improve readability.Bill Wendling2013-04-19
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179820 91177308-0d34-0410-b5e6-96231b3b80d8
* Set the compact unwind encoding to 'requires EH DWARF' if we cannot generate ↵Bill Wendling2013-04-18
| | | | | | a CU encoding. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179808 91177308-0d34-0410-b5e6-96231b3b80d8
* Re-format comments (and check commit access)Yiannis Tsiouris2013-02-28
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176270 91177308-0d34-0410-b5e6-96231b3b80d8
* Move the eliminateCallFramePseudoInstr method from TargetRegisterInfoEli Bendersky2013-02-21
| | | | | | | | | | | | | | | | | to TargetFrameLowering, where it belongs. Incidentally, this allows us to delete some duplicated (and slightly different!) code in TRI. There are potentially other layering problems that can be cleaned up as a result, or in a similar manner. The refactoring was OK'd by Anton Korobeynikov on llvmdev. Note: this touches the target interfaces, so out-of-tree targets may be affected. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175788 91177308-0d34-0410-b5e6-96231b3b80d8
* Clean up HiPE prologue emission a bit and avoid signed arithmetic tricks.Benjamin Kramer2013-02-19
| | | | | | No intended functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175536 91177308-0d34-0410-b5e6-96231b3b80d8
* X86FrameLowering.cpp: Fixup. Sorry for the breakage.NAKAMURA Takumi2013-02-18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175467 91177308-0d34-0410-b5e6-96231b3b80d8
* X86FrameLowering.cpp: Fix a warning in -Asserts. [-Wunused-variable]NAKAMURA Takumi2013-02-18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175464 91177308-0d34-0410-b5e6-96231b3b80d8
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