Commit Graph

65 Commits

Author SHA1 Message Date
Chris Lattner
18a4c16726 move dwarf debug info section selection stuff from TAI to
TLOF, unifying all the dwarf targets at the same time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77889 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-02 07:24:22 +00:00
Chris Lattner
21e1e81aa6 I need Triple information, 10.6 shouldn't set this, it bloats
object files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77887 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-02 06:51:58 +00:00
Chris Lattner
8d4a0a328a remove TargetAsmInfo::TM, which is now dead. The basic TAI class now
no longer depends on TM!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77863 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-02 04:27:24 +00:00
Chris Lattner
80ec2792b2 convert ctors/dtors section to be in TLOF instead of
TAI.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77842 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-02 00:34:36 +00:00
Chris Lattner
83d77faf6e Remove "JumpTableDataSection" from TAI, instead, have AsmPrinter
compute it based on what it knows.  As part of this, rename getSectionForMergeableConstant
to getSectionForConstant because it works for non-mergable constants also.

The only functionality change from this is that Xcore will start dropping
its jump tables into readonly section instead of data section in -static mode.
This should be fine as the linker resolves the relocations.  If this is a
problem, let me know and we'll come up with another solution.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77833 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-01 23:46:12 +00:00
Chris Lattner
b80610cd13 REmove dead fields of TAI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77820 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-01 22:40:22 +00:00
Chris Lattner
26630c1180 move emitUsedDirectiveFor to TargetLoweringObjectFile and rename it to
indicate that it is a predicate, not an emitter.  This eliminates TAI
dependencies on Mangler and GlobalValue.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77726 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-31 20:52:39 +00:00
Chris Lattner
f0144127b9 Rip all of the global variable lowering logic out of TargetAsmInfo. Since
it is highly specific to the object file that will be generated in the end,
this introduces a new TargetLoweringObjectFile interface that is implemented
for each of ELF/MachO/COFF/Alpha/PIC16 and XCore.

Though still is still a brutal and ugly refactoring, this is a major step
towards goodness.

This patch also:
1. fixes a bunch of dangling pointer problems in the PIC16 backend.
2. disables the TargetLowering copy ctor which PIC16 was accidentally using.
3. gets us closer to xcore having its own crazy target section flags and
   pic16 not having to shadow sections with its own objects.
4. fixes wierdness where ELF targets would set CStringSection but not
   CStringSection_.  Factor the code better.
5. fixes some bugs in string lowering on ELF targets.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77294 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-28 03:13:23 +00:00
Chris Lattner
92ef3f66c1 sink text/data section creation down into the target-specific places that
should know about them.  PECoff doesn't share these, and I want all sections
to be created by object-file-specific code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77196 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-27 16:20:58 +00:00
Chris Lattner
de3a1078ab 32-bit darwin targets support .literal16 too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77191 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-27 15:44:04 +00:00
Chris Lattner
e346694a81 Eliminate getNamed/getUnnamedSection, adding a new and unified getOrCreateSection
instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77186 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-27 06:17:14 +00:00
Chris Lattner
5fe575ff4f Eliminate SectionFlags, just embed a SectionKind into Section
instead and drive things based off of that.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77184 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-27 05:32:16 +00:00
Chris Lattner
2b421dad78 simplify this code now that SectionKind knows if a global is weak or not.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77141 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-26 07:07:01 +00:00
Chris Lattner
2ceb60a677 rename Mergable -> Mergeable and Writable -> Writeable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77138 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-26 06:48:26 +00:00
Chris Lattner
5c2f789952 simplify getSectionForMergableConstant to take a SectionKind.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77134 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-26 06:26:55 +00:00
Chris Lattner
8ca520944e introduce specialized mergable const sectionkinds for elements of size 4/8/16 to
simplify targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77132 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-26 06:11:33 +00:00
Chris Lattner
e346e180f3 Rearrange all the SectionKinds and structure them into a hierarchical
group instead of a bunch of random unrelated ideas.  Provide predicates
to categorize a SectionKind into a group, and use them instead of 
getKind() throughout the code.

This also renames a ton of SectionKinds to be more consistent and
evocative, and adds a huge number of comments on the enums so that
I will hopefully be able to remember how this stuff works long from
now.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77129 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-26 05:44:20 +00:00
Chris Lattner
30c4a3b9a8 finish simplifying DarwinTargetAsmInfo::SelectSectionForGlobal
for now.  Make the section switching directives more consistent
by not including \n and including \t for them all.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77107 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-26 01:24:18 +00:00
Chris Lattner
e3577da6d9 simplify DarwinTargetAsmInfo::SelectSectionForGlobal a bit
and make it more aggressive, we now put:

const int G2 __attribute__((weak)) = 42;

into the text (readonly) segment like gcc, previously we put
it into the data (readwrite) segment.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77104 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-26 00:51:36 +00:00
Chris Lattner
460d51e0c0 make SectionKind be a first-class pod struct instead of just
an enum.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77096 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-25 23:21:55 +00:00
Chris Lattner
b4fc419d83 this is (unfortunately) several changes mixed together:
1. Spell SectionFlags::Writeable as "Writable".
2. Add predicates for deriving SectionFlags from SectionKinds.
3. Sink ELF-specific getSectionPrefixForUniqueGlobal impl into
   ELFTargetAsmInfo.
4. Fix SectionFlagsForGlobal to know that BSS/ThreadBSS has the
   BSS bit set (the real fix for PR4619).
5. Fix isSuitableForBSS to not put globals with explicit sections
   set in BSS (which was the reason #4 wasn't fixed earlier).
6. Remove my previous hack for PR4619.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77085 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-25 18:57:34 +00:00
Chris Lattner
b303504a56 make SectionKindForGlobal target independent, and therefore non-virtual.
It's classifications now include elf-specific discriminators.  Targets
that don't have these features (like darwin and pecoff) simply treat
data.rel like data, etc.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76993 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-24 19:15:47 +00:00
Chris Lattner
f20f250b6f we already know the sectionkind when invoking SelectSectionForGlobal,
pass it in instead of recomputing it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76990 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-24 18:42:53 +00:00
Chris Lattner
eed05b8042 hoist section name uniquing logic up to the top-level SectionForGlobal
implementation, eliminating a dupe.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76953 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-24 05:10:25 +00:00
Chris Lattner
55acc6807f Replace UniqueSectionForGlobal with getSectionPrefixForUniqueGlobal.
The later doesn't depend on any crazy LLVM IR stuff, and this
pulls the concatenation of prefix with GV name (the root problem behind
PR4584) out one level.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76948 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-24 04:49:34 +00:00
Chris Lattner
f1581564b6 inline the two MergeableConstSection implementations into their
only caller.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76710 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-22 00:47:11 +00:00
Chris Lattner
298414ec18 remove the SelectSectionForMachineConst hook, replacing it with
a new getSectionForMergableConstant hook.  This removes one dependence
of TAI on Type, and provides the hook with enough info to make the 
right decision based on whether the global has relocations etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76705 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-22 00:28:43 +00:00
Chris Lattner
449e379bd7 simplify based on the fact that darwin always uses L/l.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76662 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-21 22:32:55 +00:00
Chris Lattner
939a8907ed make some stuff private.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76661 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-21 22:30:39 +00:00
Chris Lattner
90f8b7073d Rename LessPrivateGlobalPrefix -> LinkerPrivateGlobalPrefix to match the
LLVM IR concept.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76590 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-21 17:30:51 +00:00
Bill Wendling
ecc2da8efd Simplify the code in DarwinTargetAsmInfo::emitUsedDirectiveFor so that humans can understand it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76480 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-20 21:38:26 +00:00
Chris Lattner
e2cf37b88c Untangle a snarl that I discovered when updating the mangler,
starting in getCurrentFunctionEHName.  Among other problems,
we would try to privative a "foo.eh" label, but end up emitting
the label as _Lfoo.eh instead of L_foo.eh on darwin.  This is really
bad, and the linker has always tolerated these labels existing.
For now, just emit them as _foo.eh.

This patch also fixes problems with ".eh" labels on unnamed
functions and eliminates two strangely defined TargetAsmInfo
hooks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76231 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-17 20:46:40 +00:00
Duncan Sands
8cb6626df1 Remove StringConstantPrefix now that the only user
(llvm-gcc) has gone.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75781 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-15 12:39:48 +00:00
Chris Lattner
b8158acc23 Reapply my previous asmprinter changes now with more testing and two
additional bug fixes:

1. The bug that everyone hit was a problem in the asmprinter where it
   would remove $stub but keep the L prefix on a name when emitting the
   indirect symbol.  This is easy to fix by keeping the name of the stub
   and the name of the symbol in a StringMap instead of just keeping a
   StringSet and trying to reconstruct it late.

2. There was a problem printing the personality function.  The current
   logic to print out the personality function from the DWARF information
   is a bit of a cesspool right now that duplicates a bunch of other 
   logic in the asm printer.  The short version of it is that it depends
   on emitting both the L and _ prefix for symbols (at least on darwin)
   and until I can untangle it, it is best to switch the mangler back to
   emitting both prefixes.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75646 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-14 18:17:16 +00:00
Torok Edwin
c23197a26f llvm_unreachable->llvm_unreachable(0), LLVM_UNREACHABLE->llvm_unreachable.
This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75640 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-14 16:55:14 +00:00
Daniel Dunbar
1f316e321a Revert r7561{9,8,7,6}, which depend on r75610.
--- Reverse-merging r75619 into '.':
U    lib/Target/DarwinTargetAsmInfo.cpp
U    lib/CodeGen/AsmPrinter/AsmPrinter.cpp
--- Reverse-merging r75618 into '.':
U    lib/CodeGen/ELFWriter.cpp
U    lib/CodeGen/MachOCodeEmitter.cpp
U    lib/CodeGen/MachOWriter.cpp
--- Reverse-merging r75617 into '.':
U    lib/Target/CBackend/CBackend.cpp
--- Reverse-merging r75616 into '.':
U    tools/bugpoint/Miscompilation.cpp
U    tools/lto/LTOCodeGenerator.cpp
U    tools/lto/LTOModule.cpp


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75638 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-14 16:25:11 +00:00
Chris Lattner
5dc72d2c9f rename getValueName -> getMangledName. These two files have very
dubious looking things that I need to investigate in more detail.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75619 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-14 06:21:12 +00:00
Torok Edwin
c25e7581b9 assert(0) -> LLVM_UNREACHABLE.
Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75379 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-11 20:10:48 +00:00
Chris Lattner
4e0f25b603 merge the common darwin settings from the X86/PPC/ARM targets
into DarwinTargetAsmInfo.cpp.  The remaining differences should
be evaluated.  It seems strange that x86/arm has .zerofill but ppc
doesn't, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73742 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-19 00:08:39 +00:00
Duncan Sands
777d2306b3 Rename PaddedSize to AllocSize, in the hope that this
will make it more obvious what it represents, and stop
it being confused with the StoreSize.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71349 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-09 07:06:46 +00:00
Anton Korobeynikov
fca82deecb Do not propagate ELF-specific stuff (data.rel) into other targets. This simplifies code and also ensures correctness.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68032 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-30 15:27:43 +00:00
Anton Korobeynikov
71a7c6cde0 Add data.rel stuff
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68031 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-30 15:27:03 +00:00
Duncan Sands
667d4b8de6 Introduce new linkage types linkonce_odr, weak_odr, common_odr
and extern_weak_odr.  These are the same as the non-odr versions,
except that they indicate that the global will only be overridden
by an *equivalent* global.  In C, a function with weak linkage can
be overridden by a function which behaves completely differently.
This means that IP passes have to skip weak functions, since any
deductions made from the function definition might be wrong, since
the definition could be replaced by something completely different
at link time.   This is not allowed in C++, thanks to the ODR
(One-Definition-Rule): if a function is replaced by another at
link-time, then the new function must be the same as the original
function.  If a language knows that a function or other global can
only be overridden by an equivalent global, it can give it the
weak_odr linkage type, and the optimizers will understand that it
is alright to make deductions based on the function body.  The
code generators on the other hand map weak and weak_odr linkage
to the same thing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66339 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-07 15:45:40 +00:00
Anton Korobeynikov
72bb40229e Treat [1 x i8] zeroinitializer as a C string, placing such stuff into
mergeable string section. I don't see any bad impact of such decision
(rather then placing it into mergeable const section, as it was before),
but at least Darwin linker won't complain anymore.

The problem in LLVM is that we don't have special type for string constants
(like gcc does). Even more, we have two separate types: ConstatArray for non-null
strings and ConstantAggregateZero for null stuff.... It's a bit weird :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63142 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-27 22:29:24 +00:00
Rafael Espindola
bb46f52027 Add the private linkage.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62279 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-15 20:18:42 +00:00
Duncan Sands
ceb4d1aecb Rename getABITypeSize to getTypePaddedSize, as
suggested by Chris.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62099 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-12 20:38:59 +00:00
Devang Patel
8a84e4402a squash warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61707 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-05 17:31:22 +00:00
Dan Gohman
8f092252d3 Refactor various TargetAsmInfo subclasses' TargetMachine members away
adding a TargetMachine member to the base TargetAsmInfo class instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58624 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-03 18:22:42 +00:00
Dale Johannesen
585457e37e (re)Put const weak strings in appropriate section on Darwin.
g++dg/abi/key2.C



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57309 91177308-0d34-0410-b5e6-96231b3b80d8
2008-10-08 21:49:47 +00:00
Duncan Sands
5df3186f59 Rename isWeakForLinker to mayBeOverridden. Use it
instead of hasWeakLinkage in a bunch of optimization
passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56782 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-29 11:25:42 +00:00