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path: root/llvm/lib/CodeGen/TargetFrameLoweringImpl.cpp
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* HHVM calling conventions.Maksim Panchenko2015-09-291-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | HHVM calling convention, hhvmcc, is used by HHVM JIT for functions in translated cache. We currently support LLVM back end to generate code for X86-64 and may support other architectures in the future. In HHVM calling convention any GP register could be used to pass and return values, with the exception of R12 which is reserved for thread-local area and is callee-saved. Other than R12, we always pass RBX and RBP as args, which are our virtual machine's stack pointer and frame pointer respectively. When we enter translation cache via hhvmcc function, we expect the stack to be aligned at 16 bytes, i.e. skewed by 8 bytes as opposed to standard ABI alignment. This affects stack object alignment and stack adjustments for function calls. One extra calling convention, hhvm_ccc, is used to call C++ helpers from HHVM's translation cache. It is almost identical to standard C calling convention with an exception of first argument which is passed in RBP (before we use RDI, RSI, etc.) Differential Revision: http://reviews.llvm.org/D12681 llvm-svn: 248832
* Remove redundant TargetFrameLowering::getFrameIndexOffset virtualJames Y Knight2015-08-151-11/+8
| | | | | | | | | | | function. This was the same as getFrameIndexReference, but without the FrameReg output. Differential Revision: http://reviews.llvm.org/D12042 llvm-svn: 245148
* PrologEpilogInserter: Rewrite API to determine callee save regsiters.Matthias Braun2015-07-141-0/+30
| | | | | | | | | | | | | | | | This changes TargetFrameLowering::processFunctionBeforeCalleeSavedScan(): - Rename the function to determineCalleeSaves() - Pass a bitset of callee saved registers by reference, thus avoiding the function-global PhysRegUsed bitset in MachineRegisterInfo. - Without PhysRegUsed the implementation is fine tuned to not save physcial registers which are only read but never modified. Related to rdar://21539507 Differential Revision: http://reviews.llvm.org/D10909 llvm-svn: 242165
* Stop resetting NoFramePointerElim in TargetMachine::resetTargetOptions.Akira Hatanaka2015-05-231-0/+7
| | | | | | | | | | | | | | This is part of the work to remove TargetMachine::resetTargetOptions. In this patch, instead of updating global variable NoFramePointerElim in resetTargetOptions, its use in DisableFramePointerElim is replaced with a call to TargetFrameLowering::noFramePointerElim. This function determines on a per-function basis if frame pointer elimination should be disabled. There is no change in functionality except that cl:opt option "disable-fp-elim" can now override function attribute "no-frame-pointer-elim". llvm-svn: 238080
* [X86] Convert esp-relative movs of function arguments to pushes, step 2Michael Kuperstein2015-02-011-0/+5
| | | | | | | | | | | | | | This moves the transformation introduced in r223757 into a separate MI pass. This allows it to cover many more cases (not only cases where there must be a reserved call frame), and perform rudimentary call folding. It still doesn't have a heuristic, so it is enabled only for optsize/minsize, with stack alignment <= 8, where it ought to be a fairly clear win. (Re-commit of r227728) Differential Revision: http://reviews.llvm.org/D6789 llvm-svn: 227752
* Revert r227728 due to bad line endings.Michael Kuperstein2015-02-011-5/+0
| | | | llvm-svn: 227746
* [X86] Convert esp-relative movs of function arguments to pushes, step 2Michael Kuperstein2015-02-011-0/+5
| | | | | | | | | | | | This moves the transformation introduced in r223757 into a separate MI pass. This allows it to cover many more cases (not only cases where there must be a reserved call frame), and perform rudimentary call folding. It still doesn't have a heuristic, so it is enabled only for optsize/minsize, with stack alignment <= 8, where it ought to be a fairly clear win. Differential Revision: http://reviews.llvm.org/D6789 llvm-svn: 227728
* Remove unnecessary TargetMachine.h includes.Eric Christopher2014-10-141-2/+1
| | | | llvm-svn: 219672
* Have MachineFunction cache a pointer to the subtarget to make lookupsEric Christopher2014-08-051-2/+1
| | | | | | | | | | | shorter/easier and have the DAG use that to do the same lookup. This can be used in the future for TargetMachine based caching lookups from the MachineFunction easily. Update the MIPS subtarget switching machinery to update this pointer at the same time it runs. llvm-svn: 214838
* Remove the TargetMachine forwards for TargetSubtargetInfo basedEric Christopher2014-08-041-1/+3
| | | | | | information and update all callers. No functional change. llvm-svn: 214781
* Use the new script to sort the includes of every file under lib.Chandler Carruth2012-12-031-2/+1
| | | | | | | | | | | | | | | | | 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. =] llvm-svn: 169131
* Move parts of lib/Target that use CodeGen into lib/CodeGen.Nick Lewycky2011-12-151-0/+45
llvm-svn: 146702
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