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path: root/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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2008-03-27Avoid creating chain dependencies from CopyToReg nodes to load and storeDan Gohman
nodes. This doesn't currently have much impact the generated code, but it does produce simpler-looking SelectionDAGs, and consequently simpler-looking ScheduleDAGs, because there are fewer spurious dependencies. In particular, CopyValueToVirtualRegister now uses the entry node as the input chain dependency for new CopyToReg nodes instead of calling getRoot and depending on the most recent memory reference. Also, rename UnorderedChains to PendingExports and pull it up from being a local variable in SelectionDAGISel::BuildSelectionDAG to being a member variable of SelectionDAGISel, so that it doesn't have to be passed around to all the places that need it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48893 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21Introduce a new node for holding call argumentDuncan Sands
flags. This is needed by the new legalize types infrastructure which wants to expand the 64 bit constants previously used to hold the flags on 32 bit machines. There are two functional changes: (1) in LowerArguments, if a parameter has the zext attribute set then that is marked in the flags; before it was being ignored; (2) PPC had some bogus code for handling two word arguments when using the ELF 32 ABI, which was hard to convert because of the bogusness. As suggested by the original author (Nicolas Geoffray), I've disabled it for the moment. Tested with "make check" and the Ada ACATS testsuite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48640 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-14Do not generate special entries in the dwarf ehDuncan Sands
table for nounwind calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48373 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-12Don't try to extract an i32 from an f64. ThisDuncan Sands
getCopyToParts problem was noticed by the new LegalizeTypes infrastructure. In order to avoid this kind of thing in the future I've added a check that EXTRACT_ELEMENT is only used with integers. Once LegalizeTypes is up and running most likely BUILD_PAIR and EXTRACT_ELEMENT can be removed, in favour of using apints instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48294 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11Initial codegen support for functions and calls with multiple return values.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48244 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-10Give TargetLowering::getSetCCResultType() a parameter so that ISD::SETCC'sScott Michel
return ValueType can depend its operands' ValueType. This is a cosmetic change, no functionality impacted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48145 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-10Increase ISD::ParamFlags to 64 bits. Increase the ByValSizeDale Johannesen
field to 32 bits, thus enabling correct handling of ByVal structs bigger than 0x1ffff. Abstract interface a bit. Fixes gcc.c-torture/execute/pr23135.c and gcc.c-torture/execute/pr28982b.c in gcc testsuite (were ICE'ing on ppc32, quietly producing wrong code on x86-32.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48122 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09remove an extraneous (and ugly) default argument, thanks Duncan.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48117 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09fp_round's produced by getCopyFromParts should always be exact, becauseChris Lattner
they are produced by calls (which are known exact) and by cross block copies which are known to be produced by extends. This improves: define double @test2() { %tmp85 = call double asm sideeffect "fld0", "={st(0)}"() ret double %tmp85 } from: _test2: subl $20, %esp # InlineAsm Start fld0 # InlineAsm End fstpl 8(%esp) movsd 8(%esp), %xmm0 movsd %xmm0, (%esp) fldl (%esp) addl $20, %esp #FP_REG_KILL ret to: _test2: # InlineAsm Start fld0 # InlineAsm End #FP_REG_KILL ret by avoiding a f64 <-> f80 trip git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48108 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09extend fp values with FP_EXTEND not FP_ROUND.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48097 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-08Implement x86 support for @llvm.prefetch. It corresponds to prefetcht{0|1|2} ↵Evan Cheng
and prefetchnta instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48042 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-29Use the new APInt-enabled form of getConstant instead of convertingDan Gohman
an APInt into a uint64_t to call getConstant. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47742 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26Refactor inline asm constraint matching code out of SDIsel into TargetLowering.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47587 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-25Convert MaskedValueIsZero and all its users to use APInt. Also addDan Gohman
a SignBitIsZero function to simplify a common use case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47561 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-22Pass alignment on ByVal parameters, from FE, allDale Johannesen
the way through. It is now used for codegen. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47484 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-21Make the clobber analysis a bit more smart: we only are careful about Chris Lattner
early clobbers if the clobber list contains a *register* not some thing like {memory}, {dirflag} etc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47457 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-21Treat clobber operands like early clobbers: if we haveChris Lattner
any, we force sdisel to do all regalloc for an asm. This leads to gross but correct codegen. This fixes the rest of PR2078. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47454 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-21Atomic op support. If any gcc test uses __sync builtins, it might start ↵Andrew Lenharth
failing on archs that haven't implemented them yet git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47430 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-21Add support for matching mem operands. This fixes PR1133, patch byChris Lattner
Eli Friedman. This implements CodeGen/Generic/2008-02-20-MatchingMem.ll. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47428 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-21Fix a (harmless) but where vregs were added to the used reg lists for Chris Lattner
inline asms. Fix PR2078 by marking aliases of registers used when a register is marked used. This prevents EAX from being allocated when AX is listed in the clobber set for the asm. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47426 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-20assert is more effective reminder then FIXME tag for unimplemented features.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47388 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-20Update gcc 4.3 warnings fix patch with recent head changesAnton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47368 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-19Add GetResultInst. First step for multiple return value support.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47348 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-16llvm.memory.barrier, and impl for x86 and alphaAndrew Lenharth
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47204 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-14In TargetLowering::LowerCallTo, don't assert thatDuncan Sands
the return value is zero-extended if it isn't sign-extended. It may also be any-extended. Also, if a floating point value was returned in a larger floating point type, pass 1 as the second operand to FP_ROUND, which tells it that all the precision is in the original type. I think this is right but I could be wrong. Finally, when doing libcalls, set isZExt on a parameter if it is "unsigned". Currently isSExt is set when signed, and nothing is set otherwise. This should be right for all calls to standard library routines. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47122 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-13In SDISel, for targets that support FORMAL_ARGUMENTS nodes, lower thisChris Lattner
node as soon as we create it in SDISel. Previously we would lower it in legalize. The problem with this is that it only exposes the argument loads implied by FORMAL_ARGUMENTs after legalize, so that only dag combine 2 can hack on them. This causes us to miss some optimizations because datatype expansion also happens here. Exposing the loads early allows us to do optimizations on them. For example we now compile arg-cast.ll to: _foo: movl $2147483647, %eax andl 8(%esp), %eax ret where we previously produced: _foo: subl $12, %esp movsd 16(%esp), %xmm0 movsd %xmm0, (%esp) movl $2147483647, %eax andl 4(%esp), %eax addl $12, %esp ret It might also make sense to do this for ISD::CALL nodes, which have implicit stores on many targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47054 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-12Generalize getCopyFromParts and getCopyToParts toDuncan Sands
handle arbitrary precision integers and any number of parts. For example, on a 32 bit machine an i50 corresponds to two i32 parts. getCopyToParts will extend the i50 to an i64 then write half of the i64 to each part; getCopyFromParts will combine the two i32 parts into an i64 then truncate the result to i50. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47024 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-11Generalize the handling of call and return arguments,Duncan Sands
in preparation for apint support. These changes are intended to have no functional effect. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46967 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-10Rename MRegisterInfo to TargetRegisterInfo.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46930 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-02SDIsel processes llvm.dbg.declare by recording the variable debug ↵Evan Cheng
information descriptor and its corresponding stack frame index in MachineModuleInfo. This only works if the local variable is "homed" in the stack frame. It does not work for byval parameter, etc. Added ISD::DECLARE node type to represent llvm.dbg.declare intrinsic. Now the intrinsic calls are lowered into a SDNode and lives on through out the codegen passes. For now, since all the debugging information recording is done at isel time, when a ISD::DECLARE node is selected, it has the side effect of also recording the variable. This is a short term solution that should be fixed in time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46659 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-01Remove the nasty LABEL hack with a much less evil one. Now ↵Evan Cheng
llvm.dbg.func.start implies a stoppoint is set. SelectionDAGISel records a new source line but does not create a ISD::LABEL node for this special stoppoint. Asm printer will magically print this label. This ensures nothing is emitted before. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46635 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-31Add an extra operand to LABEL nodes which distinguishes between debug, EH, ↵Evan Cheng
or misc labels. This fixes the EH breakage. However I am not convinced this is *the* solution. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46609 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-31Rename ISD::FLT_ROUNDS to ISD::FLT_ROUNDS_ to avoid conflictingDan Gohman
with the real FLT_ROUNDS (defined in <float.h>). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46587 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-30Even though InsertAtEndOfBasicBlock is an ugly hack it still deserves a ↵Evan Cheng
proper name. Rename it to EmitInstrWithCustomInserter since it does not necessarily insert instruction at the end. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46562 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-29Handle 'X' constraint in asm's better.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46485 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-25fix long lines.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46355 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-24Forgot these.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46292 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-17* Introduce a new SelectionDAG::getIntPtrConstant methodChris Lattner
and switch various codegen pieces and the X86 backend over to using it. * Add some comments to SelectionDAGNodes.h * Introduce a second argument to FP_ROUND, which indicates whether the FP_ROUND changes the value of its input. If not it is safe to xform things like fp_extend(fp_round(x)) -> x. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46125 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-15For PR1839: add initial support for __builtin_trap. llvm-gcc part is missedAnton Korobeynikov
as well as PPC codegen git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46001 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-13Remove the assumption that byval has been applied toDuncan Sands
a pointer to a struct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45939 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-07Enabling the target-independent garbage collection infrastructure by hooking itGordon Henriksen
up to the various compiler pipelines. This doesn't actually add support for any GC algorithms, which means it temporarily breaks a few tests. To be fixed shortly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45669 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-31Rename SSARegMap -> MachineRegisterInfo in keeping with the idea Chris Lattner
that "machine" classes are used to represent the current state of the code being compiled. Given this expanded name, we can start moving other stuff into it. For now, move the UsedPhysRegs and LiveIn/LoveOuts vectors from MachineFunction into it. Update all the clients to match. This also reduces some needless #includes, such as MachineModuleInfo from MachineFunction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45467 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-30use simplified operand addition methods.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45436 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29Remove attribution from file headers, per discussion on llvmdev.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-19Simplify LowerCallTo by using a callsite.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45198 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-19The C++ exception handling personality function wantsDuncan Sands
to know about calls that cannot throw ('nounwind'): if such a call does throw for some reason then the personality will terminate the program. The distinction between an ordinary call and a nounwind call is that an ordinary call gets an entry in the exception table but a nounwind call does not. This patch sets up the exception table appropriately. One oddity is that I've chosen to bracket nounwind calls with labels (like invokes) - the other choice would have been to bracket ordinary calls with labels. While bracketing ordinary calls is more natural (because bracketing by labels would then correspond exactly to getting an entry in the exception table), I didn't do it because introducing labels impedes some optimizations and I'm guessing that ordinary calls occur more often than nounwind calls. This fixes the gcc filter2 eh test, at least at -O0 (the inliner needs some tweaking at higher optimization levels). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45197 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-17Make invokes of inline asm legal. Teach codegenDuncan Sands
how to lower them (with no attempt made to be efficient, since they should only occur for unoptimized code). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45108 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-03Rather than having special rules like "intrinsics cannotDuncan Sands
throw exceptions", just mark intrinsics with the nounwind attribute. Likewise, mark intrinsics as readnone/readonly and get rid of special aliasing logic (which didn't use anything more than this anyway). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44544 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-28Add some convenience methods for querying attributes, andDuncan Sands
use them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44403 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-27Fix PR1146: parameter attributes are longer part ofDuncan Sands
the function type, instead they belong to functions and function calls. This is an updated and slightly corrected version of Reid Spencer's original patch. The only known problem is that auto-upgrading of bitcode files doesn't seem to work properly (see test/Bitcode/AutoUpgradeIntrinsics.ll). Hopefully a bitcode guru (who might that be? :) ) will fix it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44359 91177308-0d34-0410-b5e6-96231b3b80d8
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