Commit Graph

266 Commits

Author SHA1 Message Date
Chris Lattner e55d171ccd Tblgen doesn't like multiple SDNode<> definitions that map to the sameenum value. Split them into separate enums.
llvm-svn: 27201
2006-03-28 00:40:33 +00:00
Nate Begeman ed728c1291 SelectionDAGISel can now natively handle Switch instructions, in the same
manner that the LowerSwitch LLVM to LLVM pass does: emitting a binary
search tree of basic blocks.  The new approach has several advantages:
it is faster, it generates significantly smaller code in many cases, and
it paves the way for implementing dense switch tables as a jump table by
handling switches directly in the instruction selector.

This functionality is currently only enabled on x86, but should be safe for
every target.  In anticipation of making it the default, the cfg is now
properly updated in the x86, ppc, and sparc select lowering code.

llvm-svn: 27156
2006-03-27 01:32:24 +00:00
Chris Lattner 6961fc76bb Codegen vector predicate compares.
llvm-svn: 27151
2006-03-26 10:06:40 +00:00
Evan Cheng b1ddc988af Remove PPC:isZeroVector, use ISD::isBuildVectorAllZeros instead
llvm-svn: 27149
2006-03-26 09:52:32 +00:00
Chris Lattner 1cb91b3cd9 Add some basic patterns for other datatypes
llvm-svn: 27116
2006-03-25 07:39:07 +00:00
Chris Lattner 2771e2c960 Codegen things like:
<int -1, int -1, int -1, int -1>
and
 <int 65537, int 65537, int 65537, int 65537>

Using things like:
  vspltisb v0, -1
and:
  vspltish v0, 1

instead of using constant pool loads.

This implements CodeGen/PowerPC/vec_splat.ll:splat_imm_i{32|16}.

llvm-svn: 27106
2006-03-25 06:12:06 +00:00
Chris Lattner a90b7141ed Disable the i32->float G5 optimization. It is unsafe, as documented in the
comment.

This fixes 177.mesa, and McCat/09-vor with the td scheduler.

llvm-svn: 27060
2006-03-24 07:53:47 +00:00
Chris Lattner ab882abce8 add support for using vxor to build zero vectors. This implements
Regression/CodeGen/PowerPC/vec_zero.ll

llvm-svn: 27059
2006-03-24 07:48:08 +00:00
Chris Lattner 4a66d69433 When possible, custom lower 32-bit SINT_TO_FP to this:
_foo2:
        extsw r2, r3
        std r2, -8(r1)
        lfd f0, -8(r1)
        fcfid f0, f0
        frsp f1, f0
        blr

instead of this:

_foo2:
        lis r2, ha16(LCPI2_0)
        lis r4, 17200
        xoris r3, r3, 32768
        stw r3, -4(r1)
        stw r4, -8(r1)
        lfs f0, lo16(LCPI2_0)(r2)
        lfd f1, -8(r1)
        fsub f0, f1, f0
        frsp f1, f0
        blr

This speeds up Misc/pi from 2.44s->2.09s with LLC and from 3.01->2.18s
with llcbeta (16.7% and 38.1% respectively).

llvm-svn: 26943
2006-03-22 05:30:33 +00:00
Chris Lattner 00f4683bf6 These targets don't support EXTRACT_VECTOR_ELT, though, in time, X86 will.
llvm-svn: 26930
2006-03-21 20:51:05 +00:00
Chris Lattner 6d74b09da7 remove dead variable
llvm-svn: 26907
2006-03-20 22:37:23 +00:00
Chris Lattner a1bc294f0c Fix a couple of bugs in permute/splat generate, thanks to Nate for actually
figuring these out! :)

llvm-svn: 26904
2006-03-20 18:26:51 +00:00
Chris Lattner a9a1313386 Add support for generating vspltw, instead of a vperm instruction with a
constant pool load.  This generates significantly nicer code for splats.

When tblgen gets bugfixed, we can remove the custom selection code.

llvm-svn: 26898
2006-03-20 06:51:10 +00:00
Chris Lattner a8fbb6dd3d Implement PPC::isSplatShuffleMask and PPC::getVSPLTImmediate.
llvm-svn: 26897
2006-03-20 06:37:44 +00:00
Chris Lattner ffc475689b fix duplicate definition errors
llvm-svn: 26896
2006-03-20 06:33:01 +00:00
Chris Lattner a8713b1ee6 Custom lower arbitrary VECTOR_SHUFFLE's to VPERM.
TODO: leave specific ones as VECTOR_SHUFFLE's and turn them into specialized
operations like vsplt*

llvm-svn: 26887
2006-03-20 01:53:53 +00:00
Chris Lattner 7e9440a4fc Custom lower SCALAR_TO_VECTOR into lve*x.
llvm-svn: 26868
2006-03-19 06:55:52 +00:00
Chris Lattner b1ee9c7e24 PPC doesn't have SCALAR_TO_VECTOR
llvm-svn: 26865
2006-03-19 06:17:19 +00:00
Chris Lattner f7b6e7212f rename these nodes
llvm-svn: 26848
2006-03-19 01:13:28 +00:00
Nate Begeman bb01d4f272 Remove BRTWOWAY*
Make the PPC backend not dependent on BRTWOWAY_CC and make the branch
selector smarter about the code it generates, fixing a case in the
readme.

llvm-svn: 26814
2006-03-17 01:40:33 +00:00
Evan Cheng 2dd2c652b2 Added getTargetLowering() to TargetMachine. Refactored targets to support this.
llvm-svn: 26742
2006-03-13 23:20:37 +00:00
Chris Lattner 9c7f50376a Copysign needs to be expanded everywhere. Note that Alpha and IA64 should
implement copysign as a native op if they have it.

llvm-svn: 26541
2006-03-05 05:08:37 +00:00
Chris Lattner 27f5345b1f Compile this:
void foo(float a, int *b) { *b = a; }

to this:

_foo:
        fctiwz f0, f1
        stfiwx f0, 0, r4
        blr

instead of this:

_foo:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lwz r2, -4(r1)
        stw r2, 0(r4)
        blr

This implements CodeGen/PowerPC/stfiwx.ll, and also incidentally does the
right thing for GCC bugzilla 26505.

llvm-svn: 26447
2006-03-01 05:50:56 +00:00
Chris Lattner f418435819 Use a target-specific dag-combine to implement CodeGen/PowerPC/fp-int-fp.ll.
llvm-svn: 26445
2006-03-01 04:57:39 +00:00
Evan Cheng 1926427351 Vector op lowering.
llvm-svn: 26438
2006-03-01 01:11:20 +00:00
Evan Cheng 73136dfecc - Added option -relocation-model to set relocation model. Valid values include static, pic,
dynamic-no-pic, and default.
PPC and x86 default is dynamic-no-pic for Darwin, pic for others.
- Removed options -enable-pic and -ppc-static.

llvm-svn: 26315
2006-02-22 20:19:42 +00:00
Chris Lattner 7ad77dfc2a split register class handling from explicit physreg handling.
llvm-svn: 26308
2006-02-22 00:56:39 +00:00
Chris Lattner 7bb4696dc3 Updates to match change of getRegForInlineAsmConstraint prototype
llvm-svn: 26305
2006-02-21 23:11:00 +00:00
Evan Cheng 5f99760ae7 Moved PICEnabled to include/llvm/Target/TargetOptions.h
llvm-svn: 26272
2006-02-18 00:08:58 +00:00
Chris Lattner 3a0ad47b39 Switch to using getCALLSEQ_START instead of using our own creation calls
llvm-svn: 26142
2006-02-13 08:55:29 +00:00
Chris Lattner 203b2f1288 Implement getConstraintType for PPC.
llvm-svn: 26042
2006-02-07 20:16:30 +00:00
Chris Lattner 15a6c4c444 Add the simple PPC integer constraints
llvm-svn: 26027
2006-02-07 00:47:13 +00:00
Nate Begeman 7e7f439f85 Fix some of the stuff in the PPC README file, and clean up legalization
of the SELECT_CC, BR_CC, and BRTWOWAY_CC nodes.

llvm-svn: 25875
2006-02-01 07:19:44 +00:00
Evan Cheng 32be2dc0af Allow the specification of explicit alignments for constant pool entries.
llvm-svn: 25855
2006-01-31 22:23:14 +00:00
Chris Lattner 0151361d21 add info about the inline asm register constraints for PPC
llvm-svn: 25853
2006-01-31 19:20:21 +00:00
Nate Begeman a162f208ee Codegen
bool %test(int %X) {
  %Y = seteq int %X, 13
  ret bool %Y
}

as

_test:
        addi r2, r3, -13
        cntlzw r2, r2
        srwi r3, r2, 5
        blr

rather than

_test:
        cmpwi cr7, r3, 13
        mfcr r2
        rlwinm r3, r2, 31, 31, 31
        blr

This has very little effect on most code, but speeds up analyzer 23% and
mason 11%

llvm-svn: 25848
2006-01-31 08:17:29 +00:00
Chris Lattner 32058cfb7b Functions that are lazily streamed in from the .bc file are *not* external.
This fixes llvm-test/SingleSource/UnitTests/2006-01-29-SimpleIndirectCall.c
and PR704

llvm-svn: 25793
2006-01-29 20:49:17 +00:00
Chris Lattner 3072af4d4f Now that OpActions is big enough, we can specify actions for vector types
llvm-svn: 25784
2006-01-29 08:41:37 +00:00
Chris Lattner d7738e6b32 disable this for now
llvm-svn: 25778
2006-01-29 07:31:33 +00:00
Chris Lattner d33c60b52b Request expansion of ConstantVec nodes.
llvm-svn: 25773
2006-01-29 06:32:58 +00:00
Chris Lattner 61c9a8e942 Targets all now request ConstantFP to be legalized into TargetConstantFP.
'fpimm' in .td files is now TargetConstantFP.

llvm-svn: 25771
2006-01-29 06:26:08 +00:00
Chris Lattner 30432e07f0 Fix a bug in my elimination of ISD::CALL this morning. PPC now has to
provide the expansion for i64 calls itself

llvm-svn: 25735
2006-01-28 07:33:03 +00:00
Chris Lattner f424a66524 Use PPCISD::CALL instead of ISD::CALL
llvm-svn: 25717
2006-01-27 23:34:02 +00:00
Chris Lattner 4d967a4cbb Make llvm.frame/returnaddr not crash on ppc
llvm-svn: 25710
2006-01-27 22:25:06 +00:00
Nate Begeman 8c47c3a3b1 Remove TLI.LowerReturnTo, and just let targets custom lower ISD::RET for
the same functionality.  This addresses another piece of bug 680.  Next,
on to fixing Alpha VAARG, which I broke last time.

llvm-svn: 25696
2006-01-27 21:09:22 +00:00
Evan Cheng 030e002fb9 Set SchedulingForLatency to be the default scheduling preference for all.
llvm-svn: 25607
2006-01-25 18:52:42 +00:00
Nate Begeman e74795cd70 First part of bug 680:
Remove TLI.LowerVA* and replace it with SDNodes that are lowered the same
way as everything else.

llvm-svn: 25606
2006-01-25 18:21:52 +00:00
Evan Cheng 1092a02619 Default scheduling preference is SchedulingForLatency.
llvm-svn: 25603
2006-01-25 09:15:54 +00:00
Chris Lattner ce5066c863 Don't assert on 'select_cc SETUO'
llvm-svn: 25423
2006-01-18 19:42:35 +00:00
Chris Lattner 5bd514d7b0 Use the default impl of DYNAMIC_STACKALLOC, allowing us to delete some code.
llvm-svn: 25334
2006-01-15 09:02:48 +00:00
Nate Begeman 2fba8a3aaa bswap implementation
llvm-svn: 25312
2006-01-14 03:14:10 +00:00
Chris Lattner 776c326c96 implement stacksave/stackrestore on PPC
llvm-svn: 25277
2006-01-13 17:52:03 +00:00
Chris Lattner 8e2f52e645 expand unsupported stacksave/stackrestore nodes
llvm-svn: 25272
2006-01-13 02:42:53 +00:00
Nate Begeman 1b8121b227 Add bswap, rotl, and rotr nodes
Add dag combiner code to recognize rotl, rotr
Add ppc code to match rotl

Targets should add rotl/rotr patterns if they have them

llvm-svn: 25222
2006-01-11 21:21:00 +00:00
Chris Lattner 602dfea79c Fix calls that need to store values in stack slots, to not copy the stack
pointer.  This allows us to emit stuff like this:

        li r10, 0
        stw r10, 56(r1)
        or r3, r10, r10
        or r4, r10, r10
        or r5, r10, r10
        or r6, r10, r10
        or r7, r10, r10
        or r8, r10, r10
        or r9, r10, r10
        bl L_bar$stub

instead of this:

        or r2, r1, r1     ;; Extraneous copy.
        li r10, 0
        stw r10, 56(r2)
        or r3, r10, r10
        or r4, r10, r10
        or r5, r10, r10
        or r6, r10, r10
        or r7, r10, r10
        or r8, r10, r10
        or r9, r10, r10
        bl L_bar$stub

wowness.

llvm-svn: 25221
2006-01-11 19:55:07 +00:00
Chris Lattner 66f63f72f3 Dead FP arguments still use an incoming FP reg. This fixes
Regression/CodeGen/PowerPC/2006-01-11-darwin-fp-argument.ll, which was
distilled from a miscompilation in 252.eon.

llvm-svn: 25217
2006-01-11 18:21:25 +00:00
Chris Lattner 347ed8a581 Give PPCISD:: nodes legible names in dumps.
llvm-svn: 25166
2006-01-09 23:52:17 +00:00
Chris Lattner b87030358d linkonce symbols have an extra indirection, just like weak ones do. This fixes
Prolangs-C++/family and Prolangs-C++/primes.

llvm-svn: 25119
2006-01-06 01:04:03 +00:00
Jim Laskey deeafa0f00 Had expand logic backward.
llvm-svn: 25105
2006-01-05 01:47:43 +00:00
Jim Laskey 762e9ec06c Added initial support for DEBUG_LABEL allowing debug specific labels to be
inserted in the code.

llvm-svn: 25104
2006-01-05 01:25:28 +00:00
Nate Begeman c2c8a6202f Remove a fixme
llvm-svn: 25045
2005-12-30 00:11:07 +00:00
Nate Begeman 9aea6e4691 Fix one of the things in the todo file, and get a bit closer to folding
constant offsets from statics into the address arithmetic.

llvm-svn: 24999
2005-12-24 01:00:15 +00:00
Chris Lattner c46fc2482c make sure bit_converts are expanded
llvm-svn: 24978
2005-12-23 05:13:35 +00:00
Chris Lattner f474034432 Simplify some code by using BIT_CONVERT
llvm-svn: 24974
2005-12-23 00:59:59 +00:00
Nate Begeman b11b8e44fa Pattern-match return. Includes gross hack!
llvm-svn: 24874
2005-12-20 00:26:01 +00:00
Nate Begeman 8e6a8af205 Convert load/store over to being pattern matched
llvm-svn: 24871
2005-12-19 23:25:09 +00:00
Nate Begeman 4e56db674c Add support for TargetConstantPool nodes to the dag isel emitter, and use
them in the PPC backend, to simplify some logic out of Select and
SelectAddr.

llvm-svn: 24657
2005-12-10 02:36:00 +00:00
Chris Lattner fea33f7e64 Use new PPC-specific nodes to represent shifts which require the 6-bit
amount handling that PPC provides.  These are generated by the lowering code
and prevents the dag combiner from assuming (rightfully) that the shifts
don't only look at 5 bits.  This fixes a miscompilation of crafty with
the new front-end.

llvm-svn: 24615
2005-12-06 02:10:38 +00:00
Chris Lattner 3713e6b49c Fix Regression/CodeGen/PowerPC/2005-11-30-vastart-crash.ll
llvm-svn: 24547
2005-11-30 20:40:54 +00:00
Nate Begeman 3e7db9c6d5 Hook up one type, v4f32, to the VR RegisterClass for now.
llvm-svn: 24517
2005-11-29 08:17:20 +00:00
Chris Lattner 9c415364cf No targets support line number info yet.
llvm-svn: 24513
2005-11-29 06:16:21 +00:00
Chris Lattner 3570cf456b add an option to generate completely non-pic code, corresponding to what
gcc -static produces on PPC.  This is used for building kexts and other things.

With this, materializing the address of a global looks like:

        lis r2, ha16(L_H$non_lazy_ptr)
        la r3, lo16(L_H$non_lazy_ptr)(r2)

we're still emitting stubs for functions, which is wrong.  That is next.

llvm-svn: 24399
2005-11-17 18:55:48 +00:00
Chris Lattner 8f8ed28a64 Fix a bug that resistor on IRC hit where we tried to create token factor
nodes of load results, not of their chain results.

llvm-svn: 24398
2005-11-17 18:30:17 +00:00
Chris Lattner 5aba6ae3b3 Enable global address legalization, fixing a todo and allowing the removal
of some code.  This exposes the implicit load from the stubs to the DAG, allowing
them to be optimized by the dag combiner.  It also moves darwin specific stuff
out of the isel into the legalizer, and allows more to be moved to the .td file.

llvm-svn: 24397
2005-11-17 18:26:56 +00:00
Chris Lattner 3648c20472 Use the right accessor to create this node
llvm-svn: 24394
2005-11-17 17:51:38 +00:00
Chris Lattner 595088aa0f Add an initial hack at legalizing GlobalAddress into the appropriate nodes
on Darwin to remove smarts from the isel.  This is currently disabled by
default (uncomment setOperationAction(ISD::GlobalAddress to enable it).
tblgen needs to become smarter about tglobaladdr nodes and bigger patterns
needed to be added to the .td file.  However, we can currently emit stuff like
this:  :)

        li r2, lo16(L_x$non_lazy_ptr)
        lis r3, ha16(L_x$non_lazy_ptr)
        lwzx r2, r3, r2

The obvious improvements will follow.

llvm-svn: 24390
2005-11-17 07:30:41 +00:00
Chris Lattner b7025749e1 When lowering direct calls, lower them to use a targetglobaladress directly
instead of a globaladdress.  This has no effect on the generated code at all.

llvm-svn: 24386
2005-11-17 05:56:14 +00:00
Chris Lattner f718a9e17b Fix an assert compiling MallocBench/gs
llvm-svn: 24017
2005-10-26 18:01:11 +00:00
Nate Begeman 762bf809b5 Correctly Expand or Promote FP_TO_UINT based on the capabilities of the
machine.  This allows us to generate great code for i32 FP_TO_UINT now on
targets with 64 bit extensions.

llvm-svn: 23993
2005-10-25 23:48:36 +00:00
Chris Lattner 65845a2f7c Expose the fextend on the DAG instead of doing it in the matcher
llvm-svn: 23986
2005-10-25 20:54:57 +00:00
Nate Begeman 4dd383120f Invert the TargetLowering flag that controls divide by consant expansion.
Add a new flag to TargetLowering indicating if the target has really cheap
  signed division by powers of two, make ppc use it.  This will probably go
  away in the future.
Implement some more ISD::SDIV folds in the dag combiner
Remove now dead code in the x86 backend.

llvm-svn: 23853
2005-10-21 00:02:42 +00:00
Nate Begeman c6f067a8c4 Move the target constant divide optimization up into the dag combiner, so
that the nodes can be folded with other nodes, and we can not duplicate
code in every backend.  Alpha will probably want this too.

llvm-svn: 23835
2005-10-20 02:15:44 +00:00
Nate Begeman 78afac2ddd Add the ability to lower return instructions to TargetLowering. This
allows us to lower legal return types to something else, to meet ABI
requirements (such as that i64 be returned in two i32 regs on Darwin/ppc).

llvm-svn: 23802
2005-10-18 23:23:37 +00:00
Nate Begeman e74dfbb9ce Do the right thing and enable 64 bit regs under the control of a subtarget
option.  Currently the only way to enable this is to specify the
64bitregs mattr flag.  It is never enabled by default on any config yet.

llvm-svn: 23779
2005-10-18 00:56:42 +00:00
Nate Begeman 0b71e007ef First bits of 64 bit PowerPC stuff, currently disabled. A lot of this is
purely mechanical.

llvm-svn: 23778
2005-10-18 00:28:58 +00:00
Nate Begeman 6cca84e43c More PPC32 -> PPC changes, as well as merging some classes that were
redundant after the change.

llvm-svn: 23759
2005-10-16 05:39:50 +00:00
Chris Lattner 6f3b954662 Rename PPC32*.h to PPC*.h
This completes the grand PPC file renaming

llvm-svn: 23745
2005-10-14 23:59:06 +00:00
Chris Lattner a17e6c486c fix an f32/f64 type mismatch
llvm-svn: 23587
2005-10-02 06:37:13 +00:00
Chris Lattner d3eee1a09b Modify the ppc backend to use two register classes for FP: F8RC and F4RC.
These are used to represent float and double values, and the two regclasses
contain the same physical registers.

llvm-svn: 23577
2005-10-01 01:35:02 +00:00
Chris Lattner d3ea19b51a Add FP versions of the binary operators, keeping the int and fp worlds seperate.
llvm-svn: 23506
2005-09-28 22:29:58 +00:00
Chris Lattner a028e7a39c Darwin, like many BSD systems, has a setjmp/longjmp which saves the signal mask
on setjmp calls and restores it on longjmp calls (both of which require syscalls).

This makes the calls REALLY slow.  Use _setjmp/_longjmp instead.  This speeds up
hexxagon from 120.31s to 15.68s: from 5.53x slower than GCC to 28% faster than GCC.

llvm-svn: 23482
2005-09-27 22:18:25 +00:00
Chris Lattner 0f965a615e Change the arg lowering code to use copyfromreg from vregs associated
with incoming arguments instead of the pregs themselves.  This fixes
the scheduler from causing problems by moving a copyfromreg for an argument
to after a select_cc node (now it can, and bad things won't happen).

llvm-svn: 23334
2005-09-13 19:33:40 +00:00
Chris Lattner aa6cbd90c5 Remove some dead vectors
llvm-svn: 23329
2005-09-13 18:47:49 +00:00
Chris Lattner 4309c3a785 PowerPC cannot truncstore i1 natively
llvm-svn: 23304
2005-09-10 00:21:06 +00:00
Nate Begeman 6095214bf0 Implement i64<->fp using the fctidz/fcfid instructions on PowerPC when we
are allowed to generate 64-bit-only PowerPC instructions for 32 bit hosts,
such as the PowerPC 970.

This speeds up 189.lucas from 81.99 to 32.64 seconds.

llvm-svn: 23250
2005-09-06 22:03:27 +00:00
Chris Lattner aa3b1fcc58 Decouple fsqrt from gpul optimizations, implementing fsqrt.ll.
Remove the -enable-gpopt option which is subsumed by feature flags.

llvm-svn: 23218
2005-09-02 18:33:05 +00:00
Chris Lattner 763a3a0fa7 Restore this patch now that the latent bug has been fixed
llvm-svn: 23209
2005-09-02 01:24:55 +00:00
Chris Lattner 06d440f2ee Revert the previous patch which causes a mysterious regression in toast.
llvm-svn: 23207
2005-09-02 00:47:05 +00:00
Chris Lattner 9ee867b93b Implement small-arguments.ll:test3 by teaching the DAG optimizer that
the results of calls to functions returning small values are properly
sign/zero extended.

llvm-svn: 23198
2005-09-01 23:44:32 +00:00
Chris Lattner da2e04c69d Move FCTIWZ handling out of the instruction selectors and into legalization,
getting them out of the business of making stack slots.

llvm-svn: 23180
2005-08-31 21:09:52 +00:00
Chris Lattner e675a08e10 Move SHL,SHR i64 -> legalizer
llvm-svn: 23178
2005-08-31 20:23:54 +00:00
Chris Lattner 2f03896a0f lower sra_parts on the dag, implementing it for the dag isel, and exposing
the ops to dag optimization.

llvm-svn: 23176
2005-08-31 19:09:57 +00:00
Nate Begeman e3287b85b7 Enable generation of AssertSext and AssertZext in the PPC backend.
llvm-svn: 23168
2005-08-31 01:58:39 +00:00
Chris Lattner e75b5e63a7 Fix a bug in my patch for legalizing to fsel. It cannot handle seteq/setne,
which I failed to include when I moved the code over.  This fixes
MallocBench/gs.

llvm-svn: 23140
2005-08-30 00:45:18 +00:00
Chris Lattner 62b9a5d1f8 Fix some really strange indentation that xcode likes to use.
no xcode, this is not right:

   if (!foo) break;
     X;

llvm-svn: 23138
2005-08-30 00:19:00 +00:00
Chris Lattner 9b577f108a implement SELECT_CC fully for the DAG->DAG isel!
llvm-svn: 23101
2005-08-26 21:23:58 +00:00
Chris Lattner b2854fadda Make fsel emission work with both the pattern and dag-dag selectors, by
giving it a non-instruction opcode.  The dag->dag selector used to not
select the operands of the fsel, because it thought that whole tree was
already selected.

llvm-svn: 23091
2005-08-26 20:25:03 +00:00
Chris Lattner 7f1fa8eaef implement the other half of the select_cc -> fsel lowering, which handles
when the RHS of the comparison is 0.0.  Turn this on by default.

llvm-svn: 23083
2005-08-26 17:36:52 +00:00
Chris Lattner f3d06c6417 add initial support for converting select_cc -> fsel in the legalizer
instead of in the backend.  This currently handles fsel cases with registers,
but doesn't have the 0.0 and -0.0 optimization enabled yet.

Once this is finished, special hack for fp immediates can go away.

llvm-svn: 23075
2005-08-26 00:52:45 +00:00
Nate Begeman 65ffd8fbf4 Remove option to make SetCC illegal on PowerPC after long discussion with
Chris.  This will be accomplished through correctly modeling CR's and
subregs.

llvm-svn: 23056
2005-08-25 20:01:10 +00:00
Nate Begeman f3ce09b36e Ack, typo
llvm-svn: 22981
2005-08-23 05:45:10 +00:00
Nate Begeman 7216ad415b Add an option to make SetCC illegal as a beta option
llvm-svn: 22979
2005-08-23 05:42:36 +00:00
Jim Laskey 6267b2c97c Make UINT_TO_FP and SINT_TO_FP use generic expansion.
llvm-svn: 22815
2005-08-17 00:40:22 +00:00
Chris Lattner 79f5ebc7b9 updates for changes in nodes
llvm-svn: 22808
2005-08-16 21:58:15 +00:00
Nate Begeman 371e49515d Implement BR_CC and BRTWOWAY_CC. This allows the removal of a rather nasty
fixme from the PowerPC backend.  Emit slightly better code for legalizing
select_cc.

llvm-svn: 22805
2005-08-16 19:49:35 +00:00
Chris Lattner f22556d3ad Pull the LLVM -> DAG lowering code out of the pattern selector so that it
can be shared with the DAG->DAG selector.

llvm-svn: 22799
2005-08-16 17:14:42 +00:00