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path: root/lib/Target/ARM/ARMBaseRegisterInfo.cpp
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2010-08-10Re-apply r110655 with fixes. Epilogue must restore sp from fp if the ↵Evan Cheng
function stack frame has a var-sized object. Also added a test case to check for the added benefit of this patch: it's optimizing away the unnecessary restore of sp from fp for some non-leaf functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110707 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Revert r110655, "Fix ARM hasFP() semantics. It should return true whenever FPDaniel Dunbar
register is", it breaks a couple test-suite tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110701 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-10Fix ARM hasFP() semantics. It should return true whenever FP register isEvan Cheng
reserved, not available for general allocation. This eliminates all the extra checks for Darwin. This change also fixes the use of FP to access frame indices in leaf functions and cleaned up some confusing code in epilogue emission. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110655 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-09ARMBaseRegisterInfo::hasFP() has been broken for a while now. :-(Evan Cheng
This will always be false before PEI: (DisableFramePointerElim(MF) && MFI->adjustsStack()) Which means it's going to make r11 available as a general purpose register even if -disable-fp-elim is specified. It's working on Darwin only because r7 is always reserved. But it's obviously broken for other targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110614 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05For local variables in functions with a frame pointer, use FP as a baseJim Grosbach
register for local access when it's closer to the stack slot being refererenced than the stack pointer. Make sure to take into account any argument frame SP adjustments that are in affect at the time. rdar://8256090 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110366 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05Silence a GCC warning about && and || without explicit parentheses. ThisChandler Carruth
preserves the existing behavior, as it seems a concious choice to allow RS to be null and BigStack marked true. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110307 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04and back in. false alarm on the tests from another unrelated local change.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110269 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04oops. revert for a moment to clean up tests first.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110259 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-04Reserve a stack slot if the function adjusts the stack but doesn'tJim Grosbach
simplify the call frame pseudo instructions. In that situation, the calculations for estimating the stack size will be way off, leading to not having an emergency spill slot when we need one. It should be possible to be more precise about tracking the adjustment values, but not really necessary for correctness. Upcoming cleanups for PEI in general will render that moot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110258 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03Add support for getting & setting the FPSCR application register on ARM when ↵Nate Begeman
VFP is enabled. Add support for using the FPSCR in conjunction with the vcvtr instruction, for controlling fp to int rounding. Add support for the FLT_ROUNDS_ node now that the FPSCR is exposed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110152 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-22switch a private implementation of GetFunctionSizeInBytes.Chris Lattner
This is probably not the best way to implement "Force LR to be spilled if the Thumb function size is > 2048." do this, it should use the branch shortening infrastructure, but I'm just preserving functionality here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109165 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-20Constify some arguments.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108812 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-17Remove unnecessary check that was subsumed into canRealignStack.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108588 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-17Make more explicit and add some currently disabled error messages forEric Christopher
stack realignment on ARM. Also check for function attributes as we do on X86 as well as make explicit that we're checking can as well as needs in this function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108582 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-10Add parentheses yet again to satisfy GCC's warnings.Chandler Carruth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108043 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-09In the presence of variable sized objects, allocate an emergency spill slot.Jim Grosbach
rdar://8131327 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108008 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-08Changes to ARM tail calls, mostly cosmetic.Dale Johannesen
Add explicit testcases for tail calls within the same module. Duplicate some code to humor those who think .w doesn't apply on ARM. Leave this disabled on Thumb1, and add some comments explaining why it's hard and won't gain much. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107851 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-18When using ADDri to get the address of a stack object, 255 is a conservativeJakob Stoklund Olesen
limit on the offset that can be materialized without using the register scavenger. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106312 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-18An attempt to fix the problem Anton reported withDale Johannesen
ARM tail calls. Don't know if it works, but it doesn't break Darwin. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106309 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-15Next round of tail call changes. Register used in a tailDale Johannesen
call must not be callee-saved; following x86, add a new regclass to represent this. Also fixes a couple of bugs. Still disabled by default; Thumb doesn't work yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106053 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-03Early implementation of tail call for ARM.Dale Johannesen
A temporary flag -arm-tail-calls defaults to off, so there is no functional change by default. Intrepid users may try this; simple cases work but there are bugs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105413 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-02Rename canCombinedSubRegIndex method to something more grammatically correctBob Wilson
and tidy up the comment describing it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105339 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-02Replace ARM's getCalleeSavedRegClasses with a simpler solutionRafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105335 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-25Use enums instead of literals in the ARM backend.Jakob Stoklund Olesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104573 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-24Switch ARMRegisterInfo.td to use SubRegIndex and eliminate the parallel enumsJakob Stoklund Olesen
from ARMRegisterInfo.h git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104508 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-17ARMBaseRegisterInfo::estimateRSStackSizeLimit() could return prematurely with aJakob Stoklund Olesen
too large limit. The function would return immediately when finding an addrmode 3/5 instruction. It needs to keep scanning in case there is an addrmode 6 instruction which drops the limit to 0. A test case is very difficult to produce because it will only fail when the scavenger is used. rdar://problem/7894847 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103995 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-14Teach two-address pass to do some coalescing while eliminating REG_SEQUENCEEvan Cheng
instructions. e.g. %reg1026<def> = VLDMQ %reg1025<kill>, 260, pred:14, pred:%reg0 %reg1027<def> = EXTRACT_SUBREG %reg1026, 6 %reg1028<def> = EXTRACT_SUBREG %reg1026<kill>, 5 ... %reg1029<def> = REG_SEQUENCE %reg1028<kill>, 5, %reg1027<kill>, 6, %reg1028, 7, %reg1027, 8, %reg1028, 9, %reg1027, 10, %reg1030<kill>, 11, %reg1032<kill>, 12 After REG_SEQUENCE is eliminated, we are left with: %reg1026<def> = VLDMQ %reg1025<kill>, 260, pred:14, pred:%reg0 %reg1029:6<def> = EXTRACT_SUBREG %reg1026, 6 %reg1029:5<def> = EXTRACT_SUBREG %reg1026<kill>, 5 The regular coalescer will not be able to coalesce reg1026 and reg1029 because it doesn't know how to combine sub-register indices 5 and 6. Now 2-address pass will consult the target whether sub-registers 5 and 6 of reg1026 can be combined to into a larger sub-register (or combined to be reg1026 itself as is the case here). If it is possible, it will be able to replace references of reg1026 with reg1029 + the larger sub-register index. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103835 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
2010-05-14Added a QQQQ register file to model 4-consecutive Q registers.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103760 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-13Fix pr7110: For non-Darwin targets UnspilledCS1GPRs may include high registers.Bob Wilson
Do not use those for Thumb1 functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103730 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-06Re-apply 103156 and 103157. 103156 didn't break anything. 10315 exposed a ↵Evan Cheng
coalescer bug that's fixed by 103170. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103172 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-06Revert r103156 since it was breaking the build bots.Eric Christopher
Reverse-merging r103156 into '.': U lib/Target/ARM/ARMInstrNEON.td U lib/Target/ARM/ARMRegisterInfo.h U lib/Target/ARM/ARMBaseRegisterInfo.cpp U lib/Target/ARM/ARMBaseInstrInfo.cpp U lib/Target/ARM/ARMRegisterInfo.td git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103159 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-06Adding pseudo 256-bit registers QQ0 . . . QQ7 to represent pairs of Q ↵Evan Cheng
registers. These will be used to model VLD2 / VST2 instructions in order to get substantially better codegen for them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103156 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26Add ARM specific emitFrameIndexDebugValue.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102324 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-21Implement -disable-non-leaf-fp-elim which disable frame pointer eliminationEvan Cheng
optimization for non-leaf functions. This will be hooked up to gcc's -momit-leaf-frame-pointer option. rdar://7886181 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101984 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15ReuseFrameIndexVals is used in multiple files, so it can't be static.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101379 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15Fix a bunch of namespace polution.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101376 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15Add const qualifiers to CodeGen's use of LLVM IR constructs.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101334 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-02use DebugLoc default ctor instead of DebugLoc::getUnknownLoc()Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100214 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-20Fix a very bad typo. Since the register number was off by one, the ARMBob Wilson
load/store optimizer would incorrectly think that registers D26 and D28 were consecutive and would generate a VLDM instruction to load them. The assembler was not convinced. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99043 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-10Make sure the LR gets pushed in functions that use vaargs. This fixesJim Grosbach
400.perlbench for the nightly tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98183 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-09Change the Value argument to eliminateFrameIndex to a type-tagged value. ThisJim Grosbach
is preparatory to having PEI's scavenged frame index value reuse logic properly distinguish types of frame values (e.g., whether the value is stack-pointer relative or frame-pointer relative). No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98086 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-09scavenged frame index value re-use gets confused when more than one baseJim Grosbach
register is involved for thumb1. Work around this for the moment by only re-using SP-relative offsets. This is temporary 'til the code can distinguish multiple base registers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98071 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-04pr6478: The frame pointer spill frame index is only defined when there is aBob Wilson
frame pointer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97755 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-24Create a stack frame on ARM whenJakob Stoklund Olesen
- Function uses all scratch registers AND - Function does not use any callee saved registers AND - Stack size is too big to address with immediate offsets. In this case a register must be scavenged to calculate the address of a stack object, and the scavenger needs a spare register or emergency spill slot. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97071 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-24Remove an unused variable. Was this intentional?Chandler Carruth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97022 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-24handle very large call frames when require SPAdj != 0 for Thumb1Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97013 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-23Spelling. s/suppor /support /Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96954 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-22Updated version of r96634 (which was reverted due to failing 176.gcc andJim Grosbach
126.gcc nightly tests. These failures uncovered latent bugs that machine DCE could remove one half of a stack adjust down/up pair, causing PEI to assert. This update fixes that, and the tests now pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96822 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-22Clean up a bit and fix for when SPAdj != 0Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96818 91177308-0d34-0410-b5e6-96231b3b80d8
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