Commit Graph

599 Commits

Author SHA1 Message Date
Dan Gohman
67780f108c Use isa instead of dyn_cast.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50181 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-23 20:25:16 +00:00
Dan Gohman
3dc34f682d Add support to codegen for getresult instructions with undef operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50180 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-23 20:21:29 +00:00
Nicolas Geoffray
6ccbbd8990 Change Divided flag to Split, as suggested by Evan
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49715 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-15 08:08:50 +00:00
Nicolas Geoffray
9701c8a18f Fix /test/CodeGen/PowerPC/big-endian-actual-args.ll for linux/ppc32
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49652 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-14 17:17:14 +00:00
Nicolas Geoffray
c0cb28fd3a Add a divided flag for the first piece of an argument divided into mulitple parts. Fixes PR1643
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49611 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-13 13:40:22 +00:00
Dan Gohman
707e018423 Drop ISD::MEMSET, ISD::MEMMOVE, and ISD::MEMCPY, which are not Legal
on any current target and aren't optimized in DAGCombiner. Instead
of using intermediate nodes, expand the operations, choosing between
simple loads/stores, target-specific code, and library calls,
immediately.

Previously, the code to emit optimized code for these operations
was only used at initial SelectionDAG construction time; now it is
used at all times. This fixes some cases where rep;movs was being
used for small copies where simple loads/stores would be better.

This also cleans up code that checks for alignments less than 4;
let the targets make that decision instead of doing it in
target-independent code. This allows x86 to use rep;movs in
low-alignment cases.

Also, this fixes a bug that resulted in the use of rep;stos for
memsets of 0 with non-constant memory size when the alignment was
at least 4. It's better to use the library in this case, which
can be significantly faster when the size is large.

This also preserves more SourceValue information when memory
intrinsics are lowered into simple loads/stores.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49572 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-12 04:36:06 +00:00
Dale Johannesen
a4091d34f3 Make sure both PendingLoads and PendingExports are flushed
before an invoke.  Failure to do this causes references in
the landing pad to variables that were not set.  Fixes
g++.dg/eh/delayslot1.C
g++.dg/eh/fp-regs.C
g++.old-deja/g++.brendan/eh1.C



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49243 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-04 23:48:31 +00:00
Dale Johannesen
1532f3ddd7 Recommitting EH patch; this should answer most of the
review feedback.
-enable-eh is still accepted but doesn't do anything.
EH intrinsics use Dwarf EH if the target supports that,
and are handled by LowerInvoke otherwise.
The separation of the EH table and frame move data is,
I think, logically figured out, but either one still
causes full EH info to be generated (not sure how to
split the metadata correctly).
MachineModuleInfo::needsFrameInfo is no longer used and
is removed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49064 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-02 00:25:04 +00:00
Dale Johannesen
b6d5b14390 Revert 49006 for the moment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49046 91177308-0d34-0410-b5e6-96231b3b80d8
2008-04-01 20:00:57 +00:00
Dale Johannesen
1544e4713b Emit exception handling info for functions which are
not marked nounwind, or for all functions when -enable-eh
is set, provided the target supports Dwarf EH.

llvm-gcc generates nounwind in the right places; other FEs
will need to do so also.  Given such a FE, -enable-eh should
no longer be needed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49006 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-31 23:40:23 +00:00
Chris Lattner
d27c991ceb Fix "Control reaches the end of non-void function" warnings,
patch by David Chisnall.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48963 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-30 18:22:13 +00:00
Dan Gohman
86e1ebf9bb Avoid creating chain dependencies from CopyToReg nodes to load and store
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
2008-03-27 19:56:19 +00:00
Duncan Sands
276dcbdc8d Introduce a new node for holding call argument
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
2008-03-21 09:14:45 +00:00
Duncan Sands
23a1d0c161 Do not generate special entries in the dwarf eh
table for nounwind calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48373 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-14 21:36:24 +00:00
Duncan Sands
25eb043759 Don't try to extract an i32 from an f64. This
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
2008-03-12 20:30:08 +00:00
Dan Gohman
ef5d194aaa Initial codegen support for functions and calls with multiple return values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48244 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11 21:11:25 +00:00
Scott Michel
5b8f82e35b Give TargetLowering::getSetCCResultType() a parameter so that ISD::SETCC's
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
2008-03-10 15:42:14 +00:00
Dale Johannesen
b8cafe3427 Increase ISD::ParamFlags to 64 bits. Increase the ByValSize
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
2008-03-10 02:17:22 +00:00
Chris Lattner
4c55c633d9 remove an extraneous (and ugly) default argument, thanks Duncan.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48117 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09 20:04:36 +00:00
Chris Lattner
4468c1fd1c fp_round's produced by getCopyFromParts should always be exact, because
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
2008-03-09 09:38:46 +00:00
Chris Lattner
d43d85ccc9 extend fp values with FP_EXTEND not FP_ROUND.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48097 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09 07:47:22 +00:00
Evan Cheng
27b7db549e Implement x86 support for @llvm.prefetch. It corresponds to prefetcht{0|1|2} and prefetchnta instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48042 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-08 00:58:38 +00:00
Dan Gohman
c6f9a06238 Use the new APInt-enabled form of getConstant instead of converting
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
2008-02-29 01:41:59 +00:00
Evan Cheng
5c80760fdf Refactor inline asm constraint matching code out of SDIsel into TargetLowering.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47587 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26 02:33:44 +00:00
Dan Gohman
2e68b6f52d Convert MaskedValueIsZero and all its users to use APInt. Also add
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
2008-02-25 21:11:39 +00:00
Dale Johannesen
08e78b18b8 Pass alignment on ByVal parameters, from FE, all
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
2008-02-22 17:49:45 +00:00
Chris Lattner
69e6a8d5a8 Make the clobber analysis a bit more smart: we only are careful about
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
2008-02-21 20:54:31 +00:00
Chris Lattner
0fe71e9bb1 Treat clobber operands like early clobbers: if we have
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
2008-02-21 19:43:13 +00:00
Andrew Lenharth
ab0b949e0e Atomic op support. If any gcc test uses __sync builtins, it might start 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
2008-02-21 06:45:13 +00:00
Chris Lattner
f9853bc0d4 Add support for matching mem operands. This fixes PR1133, patch by
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
2008-02-21 05:27:19 +00:00
Chris Lattner
7cbeb2431c Fix a (harmless) but where vregs were added to the used reg lists for
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
2008-02-21 04:55:52 +00:00
Devang Patel
c40a84a877 assert is more effective reminder then FIXME tag for unimplemented features.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47388 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-20 18:37:40 +00:00
Anton Korobeynikov
4c71dfe356 Update gcc 4.3 warnings fix patch with recent head changes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47368 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-20 11:10:28 +00:00
Devang Patel
40a04216da Add GetResultInst. First step for multiple return value support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47348 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-19 22:15:16 +00:00
Andrew Lenharth
22c5c1b2df llvm.memory.barrier, and impl for x86 and alpha
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47204 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-16 01:24:58 +00:00
Duncan Sands
00fee65fd2 In TargetLowering::LowerCallTo, don't assert that
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
2008-02-14 17:28:50 +00:00
Chris Lattner
86ca3cacc5 In SDISel, for targets that support FORMAL_ARGUMENTS nodes, lower this
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
2008-02-13 07:39:09 +00:00
Duncan Sands
014e04a5da Generalize getCopyFromParts and getCopyToParts to
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
2008-02-12 20:46:31 +00:00
Duncan Sands
b988baccc2 Generalize the handling of call and return arguments,
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
2008-02-11 20:58:28 +00:00
Dan Gohman
6f0d024a53 Rename MRegisterInfo to TargetRegisterInfo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46930 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-10 18:45:23 +00:00
Evan Cheng
a844bdeab3 SDIsel processes llvm.dbg.declare by recording the variable debug 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
2008-02-02 04:07:54 +00:00
Evan Cheng
1b08bbca55 Remove the nasty LABEL hack with a much less evil one. Now 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
2008-02-01 09:10:45 +00:00
Evan Cheng
bb81d97feb Add an extra operand to LABEL nodes which distinguishes between debug, EH, 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
2008-01-31 09:59:15 +00:00
Dan Gohman
1a0248690a Rename ISD::FLT_ROUNDS to ISD::FLT_ROUNDS_ to avoid conflicting
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
2008-01-31 00:41:03 +00:00
Evan Cheng
ff9b373e8f Even though InsertAtEndOfBasicBlock is an ugly hack it still deserves a 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
2008-01-30 18:18:23 +00:00
Dale Johannesen
ba2a0b960e Handle 'X' constraint in asm's better.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46485 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-29 02:21:21 +00:00
Chris Lattner
5bab78527a fix long lines.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46355 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-25 17:24:52 +00:00
Evan Cheng
3ae054385c Forgot these.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46292 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-24 00:22:01 +00:00
Chris Lattner
0bd4893a07 * Introduce a new SelectionDAG::getIntPtrConstant method
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
2008-01-17 07:00:52 +00:00
Anton Korobeynikov
66fac79b89 For PR1839: add initial support for __builtin_trap. llvm-gcc part is missed
as well as PPC codegen


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46001 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-15 07:02:33 +00:00