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path: root/lib/CodeGen/PrologEpilogInserter.cpp
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2012-02-21Clear virtual registers after they are no longer referenced.Andrew Trick
Passes after RegAlloc should be able to rely on MRI->getNumVirtRegs() == 0. This makes sharing code for pre/postRA passes more robust. Now, to check if a pass is running before the RA pipeline begins, use MRI->isSSA(). To check if a pass is running after the RA pipeline ends, use !MRI->getNumVirtRegs(). PEI resets virtual regs when it's done scavenging. PTX will either have to provide its own PEI pass or assign physregs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151032 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-08Codegen pass definition cleanup. No functionality.Andrew Trick
Moving toward a uniform style of pass definition to allow easier target configuration. Globally declare Pass ID. Globally declare pass initializer. Use INITIALIZE_PASS consistently. Add a call to the initializer from CodeGen.cpp. Remove redundant "createPass" functions and "getPassName" methods. While cleaning up declarations, cleaned up comments (sorry for large diff). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150100 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-06Expose TargetPassConfig to PEI PassAndrew Trick
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149927 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-21Move common code into an MRI function.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147071 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-07Add bundle aware API for querying instruction properties and switch the codeEvan Cheng
generator to it. For non-bundle instructions, these behave exactly the same as the MC layer API. For properties like mayLoad / mayStore, look into the bundle and if any of the bundled instructions has the property it would return true. For properties like isPredicable, only return true if *all* of the bundled instructions have the property. For properties like canFoldAsLoad, isCompare, conservatively return false for bundles. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146026 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-02Move global variables in TargetMachine into new TargetOptions class. As an APINick Lewycky
change, now you need a TargetOptions object to create a TargetMachine. Clang patch to follow. One small functionality change in PTX. PTX had commented out the machine verifier parts in their copy of printAndVerify. That now calls the version in LLVMTargetMachine. Users of PTX who need verification disabled should rely on not passing the command-line flag to enable it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145714 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-14A few 80-col violations.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141988 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-31Spelling and grammar fixes to problems found by Duncan.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138858 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-30Emit segmented-stack specific code into function prologues forRafael Espindola
X86. Modify the pass added in the previous patch to call this new code. This new prologues generated will call a libgcc routine (__morestack) to allocate more stack space from the heap when required Patch by Sanjoy Das. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138812 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-04Count the total amount of stack space used in compiled functions.Jakob Stoklund Olesen
Patch by Ivan Krasin! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136921 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-28Move CallFrameSetupOpcode and CallFrameDestroyOpcode to TargetInstrInfo.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134030 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-15Fix a ton of comment typos found by codespell. Patch byChris Lattner
Luis Felipe Strano Moraes! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129558 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-03Allow a target to choose whether to prefer the scavenger emergency spill slotJim Grosbach
be next to the frame pointer or the stack pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126956 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-10Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs ↵Anton Korobeynikov
and fixes here and there. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123170 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-07Do not model all INLINEASM instructions as having unmodelled side effects.Evan Cheng
Instead encode llvm IR level property "HasSideEffects" in an operand (shared with IsAlignStack). Added MachineInstrs::hasUnmodeledSideEffects() to check the operand when the instruction is an INLINEASM. This allows memory instructions to be moved around INLINEASM instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123044 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-27Move more PEI-related hooks to TFIAnton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120229 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-27Move callee-saved regs spills / reloads to TFIAnton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120228 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-18Move hasFP() and few related hooks to TargetFrameInfo.Anton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119740 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-15First step of huge frame-related refactoring: move emit{Prologue,Epilogue} ↵Anton Korobeynikov
out of TargetRegisterInfo to TargetFrameInfo, which is definitely much better suitable place git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119097 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-27Formatting.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117453 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-18Trivial grammar tweak.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116710 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-12Begin adding static dependence information to passes, which will allow us toOwen Anderson
perform initialization without static constructors AND without explicit initialization by the client. For the moment, passes are required to initialize both their (potential) dependencies and any passes they preserve. I hope to be able to relax the latter requirement in the future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116334 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-07Now with fewer extraneous semicolons!Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115996 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26Simplify eliminateFrameIndex() interface back down now that PEI doesn't needJim Grosbach
to try to re-use scavenged frame index reference registers. rdar://8277890 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112241 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26Remove the now obsolete frame index virtual re-use algorithm from PEI. Pre-RAJim Grosbach
virtual base registers handle this function, and more. A bit more cleanup to do on the interface to eliminateFrameIndex() after this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112237 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-25Add some statistics for PEI register scavengingJim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112084 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-24Move enabling the local stack allocation pass into the target where it belongs.Jim Grosbach
For now it's still a command line option, but the interface to the generic code doesn't need to know that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111942 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-23Remove the MFI storage of the local allocation block size. It's not needed.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111847 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-23Better handling of local offsets for downwards growing stacks. This correctsJim Grosbach
relative offsets when there are offsets encoded in the instructions and simplifies final allocation in PEI. rdar://8277890 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111836 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-19Update local stack block allocation to let PEI do the allocs if no additionalJim Grosbach
base registers were required. This will allow for slightly better packing of the locals when alignment padding is necessary after callee saved registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111508 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-17Add materialization of virtual base registers for frame indices allocated intoJim Grosbach
the local block. Resolve references to those indices to a new base register. For simplification and testing purposes, a new virtual base register is allocated for each frame index being resolved. The result is truly horrible, but correct, code that's good for exercising the new code paths. Next up is adding thumb1 support, which should be very simple. Following that will be adding base register re-use and implementing a reasonable ARM heuristic for when a virtual base register should be generated at all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111315 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-16tidy up. remove unused local.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111206 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-16Better handle alignment requirements for local objects in pre-regalloc frameJim Grosbach
mapping. Have the local block track its alignment requirement, and then apply that when the block itself is allocated. Previously, offsets could get adjusted in PEI to be different, relative to one another, than the block allocation thought they would be, which defeats the point of doing the allocation this way. Continuing rdar://8277890 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111197 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-14Add a local stack object block allocation pass. This is still anJim Grosbach
experimental pass that allocates locals relative to one another before register allocation and then assigns them to actual stack slots as a block later in PEI. This will eventually allow targets with limited index offset range to allocate additional base registers (not just FP and SP) to more efficiently reference locals, as well as handle situations where locals cannot be referenced via SP or FP at all (dynamic stack realignment together with variable sized objects, for example). It's currently incomplete and almost certainly buggy. Work in progress. Disabled by default and gated via the -enable-local-stack-alloc command line option. rdar://8277890 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111059 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06Cleanup comment wordingJim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110466 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-27It's better to have the arrays, which would trigger the creation of stackBill Wendling
protectors, to be near the stack protectors on the stack. Accomplish this by tagging the stack object with a predicate that indicates that it would trigger this. In the prolog-epilog inserter, assign these objects to the stack after the stack protector but before the other objects. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109481 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-21Fix batch of converting RegisterPass<> to INTIALIZE_PASS().Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109045 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-08Clean up scavengeRegister() a bit to prefer available regs, which allowsJim Grosbach
the simplification of frame index register scavenging to not have to check for available registers directly and instead just let scavengeRegister() handle it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107880 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-08When processing frame index virtual registers, consider all available registersJim Grosbach
(if there are any) and use the one which remains available for the longest rather than just using the first one. This should help enable better re-use of the loaded frame index values. rdar://7318760 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107847 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-03Remove isSS argument from CreateFixedObject. Fixed objects cannot be spill ↵Evan Cheng
slots so it's always false. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107550 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-02Custom inserters (e.g., conditional moves in Thumb1 can introduceJim Grosbach
new basic blocks, and if used as a function argument, that can cause call frame setup / destroy pairs to be split across a basic block boundary. That prevents us from doing a simple assertion to check that the pairs match and alloc/ dealloc the same amount of space. Modify the assertion to only check the amount allocated when there are matching pairs in the same basic block. rdar://8022442 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107517 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-02Propagate the AlignStack bit in InlineAsm's to the Dale Johannesen
PrologEpilog code, and use it to determine whether the asm forces stack alignment or not. gcc consistently does not do this for GCC-style asms; Apple gcc inconsistently sometimes does it for asm blocks. There is no convenient place to put a bit in either the SDNode or the MachineInstr form, so I've added an extra operand to each; unlovely, but it does allow for expansion for more bits, should we need it. PR 5125. Some existing testcases are affected. The operand lists of the SDNode and MachineInstr forms are indexed with awesome mnemonics, like "2"; I may fix this someday, but not now. I'm not making it any worse. If anyone is inspired I think you can find all the right places from this patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107506 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-02Remove the TargetRegisterClass member from CalleeSavedInfoRafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105344 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-02Remove uses of getCalleeSavedRegClasses from outside theRafael Espindola
backends and removes the virtual declaration. With that out of the way I should be able to cleanup one backend at a time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105321 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-22Implement @llvm.returnaddress. rdar://8015977.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104421 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-14Rename "HasCalls" in MachineFrameInfo to "AdjustsStack" to better describe whatBill Wendling
the variable actually tracks. N.B., several back-ends are using "HasCalls" as being synonymous for something that adjusts the stack. This isn't 100% correct and should be looked into. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103802 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-06Add argument TargetRegisterInfo to loadRegFromStackSlot and storeRegToStackSlot.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103193 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-03Reword a comment slightly.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102966 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-29Make naked functions work on PPC.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102657 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13Rename MachineFrameInfo variables to MFI, for consistency withDan Gohman
the rest of CodeGen. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101146 91177308-0d34-0410-b5e6-96231b3b80d8
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