Commit Graph

2196 Commits

Author SHA1 Message Date
Chris Lattner
308575be66 Legalize MERGE_VALUES, expand READCYCLECOUNTER correctly, so it doesn't
break control dependence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24437 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-20 22:56:56 +00:00
Andrew Lenharth
f70e30b41d The first patch of X86 support for read cycle counter
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24429 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-20 21:32:07 +00:00
Chris Lattner
6bf234c4a8 more progress towards bug 291 being finished. Patch by Owen Anderson,
HAVE_GV case fixed up by me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24428 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-20 03:45:52 +00:00
Chris Lattner
b67eb9131c Unbreak codegen of bools. This should fix the llc/jit/llc-beta failures
from last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24427 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-19 18:40:42 +00:00
Chris Lattner
3aa2c74e19 Improve Selection DAG printer portability. Patch by Owen Anderson!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24425 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-19 07:44:09 +00:00
Chris Lattner
44fa764355 Teach the graph viewer to handle register operands that are zero.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24421 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-19 06:58:46 +00:00
Chris Lattner
b89175feff Silence a bogus warning
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24420 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-19 05:51:46 +00:00
Chris Lattner
0fb094fd60 Add some method variants, patch by Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24418 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-19 01:44:53 +00:00
Nate Begeman
5fbb5d2459 Teach LLVM how to scalarize packed types. Currently, this only works on
packed types with an element count of 1, although more generic support is
coming.  This allows LLVM to turn the following code:

void %foo(<1 x float> * %a) {
entry:
  %tmp1 = load <1 x float> * %a;
  %tmp2 = add <1 x float> %tmp1, %tmp1
  store <1 x float> %tmp2, <1 x float> *%a
  ret void
}

Into:

_foo:
        lfs f0, 0(r3)
        fadds f0, f0, f0
        stfs f0, 0(r3)
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24416 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-19 00:36:38 +00:00
Nate Begeman
e21ea61588 Split out the shift code from visitBinary.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24412 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-18 07:42:56 +00:00
Chris Lattner
0c8fbe33a4 Allow targets to custom legalize leaf nodes like GlobalAddress.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24387 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-17 06:41:44 +00:00
Chris Lattner
b9debbf54c Teach legalize about targetglobaladdress
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24385 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-17 05:52:24 +00:00
Chris Lattner
b1a5a5c4c0 when debugging lower dbg intrinsics to calls
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24377 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-16 07:22:30 +00:00
Chris Lattner
27ecef510f Remove extraneous parents around constants when using a constant expr cast.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24357 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-15 00:03:16 +00:00
Chris Lattner
a1ab72daad Teach emitAlignment to handle explicit alignment requests by globals.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24354 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-14 19:00:06 +00:00
Jeff Cohen
06d9b4ab24 Fix operator precedence bug caught by VC++.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24318 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-12 00:59:01 +00:00
Andrew Lenharth
8b91c77385 added a chain output
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24306 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-11 22:48:54 +00:00
Andrew Lenharth
51b8d54922 continued readcyclecounter support
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24300 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-11 16:47:30 +00:00
Chris Lattner
ed0c4ecf05 nuke blank line
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24278 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-10 18:49:46 +00:00
Chris Lattner
450de393ac Get rid of casts by #including the right header
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24275 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-10 18:36:17 +00:00
Chris Lattner
2a21c6e861 Compile C strings to:
l1__2E_str_1:                           ; '.str_1'
        .asciz  "foo"

not:

        .align  0
l1__2E_str_1:                           ; '.str_1'
        .asciz  "foo"


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24273 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-10 18:09:27 +00:00
Chris Lattner
2980cefb80 add support for .asciz, and enable it by default. If your target assemblerdoesn't support .asciz, just set AscizDirective to null in your asmprinter.
This compiles C strings to:

l1__2E_str_1:                           ; '.str_1'
        .asciz  "foo"

instead of:

l1__2E_str_1:                           ; '.str_1'
        .ascii  "foo\000"


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24272 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-10 18:06:33 +00:00
Chris Lattner
de202b3cda Switch the allnodes list from a vector of pointers to an ilist of nodes.This eliminates the vector, allows constant time removal of a node froma graph, and makes iteration over the all nodes list stable when adding
nodes to the graph.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24263 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 23:47:37 +00:00
Chris Lattner
c9ea6fde30 Refactor intrinsic lowering stuff out of visitCall
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24261 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 19:44:01 +00:00
Chris Lattner
040c11c24e Handle the trivial (but common) two-op case more efficiently
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24259 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 18:48:57 +00:00
Chris Lattner
e6a88ac1b9 Nuke noop copies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24258 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 18:22:42 +00:00
Chris Lattner
6b2d69655a Fix CodeGen/X86/shift-folding.ll:test3 on X86
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24256 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 16:50:40 +00:00
Chris Lattner
9a5ef20f5e Disable some overly-aggressive checking code. This speeds up the local
allocator from 23s to 11s on kc++ in debug mode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24255 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 05:28:45 +00:00
Chris Lattner
7436b57de3 Avoid creating a token factor node in trivially redundant cases. This
eliminates almost one node per block in common cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24254 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 05:03:03 +00:00
Chris Lattner
7c0104b525 Handle GEP's a bit more intelligently. Fold constant indices early and
turn power-of-two multiplies into shifts early to improve compile time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24253 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-09 04:45:33 +00:00
Chris Lattner
0d902a9c74 Allocate the right amount of memory for this vector up front.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24252 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-08 23:32:44 +00:00
Chris Lattner
a32551197a Change the ValueList array for each node to be shared instead of individuallyallocated. Further, in the common case where a node has a single value, justreference an element from a small array. This is a small compile-time win.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24251 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-08 23:30:28 +00:00
Chris Lattner
65113b2f86 Switch the operandlist/valuelist from being vectors to being just an array.This saves 12 bytes from SDNode, but doesn't speed things up substantially
(our graphs apparently already fit within the cache on my g5).  In any case
this reduces memory usage.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24249 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-08 22:07:03 +00:00
Chris Lattner
4012eb2137 Explicitly initialize some instance vars
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24247 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-08 21:54:57 +00:00
Chris Lattner
f469cb6546 Clean up RemoveDeadNodes significantly, by eliminating the need for a temporary
set and eliminating the need to iterate whenever something is removed (which
can be really slow in some cases).  Thx to Jim for pointing out something silly
I was getting stuck on. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24241 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-08 18:52:27 +00:00
Jim Laskey
26b91ebb63 Let's try ignoring resource utilization on the backward pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24231 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-07 19:08:53 +00:00
Chris Lattner
cbef8ba5f9 Always compute max align.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24227 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-06 17:43:20 +00:00
Nate Begeman
ae232e7a10 Add the necessary support to the ISel to allow targets to codegen the new
alignment information appropriately.  Includes code for PowerPC to support
fixed-size allocas with alignment larger than the stack.  Support for
arbitrarily aligned dynamic allocas coming soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24224 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-06 09:00:38 +00:00
Jim Laskey
a5e5bff8b8 Fix logic bug in finding retry slot in tally.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24188 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-05 00:01:25 +00:00
Jim Laskey
54f997d23f Fix a warning
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24187 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-04 18:26:02 +00:00
Jim Laskey
7d090f3485 Scheduling now uses itinerary data.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24180 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-04 04:05:35 +00:00
Nate Begeman
5dc7e861f8 Fix a crash that Andrew noticed, and add a pair of braces to unfconfuse
XCode's indenting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24159 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-02 18:42:59 +00:00
Chris Lattner
7c22575e32 Fix a source of undefined behavior when dealing with 64-bit types. This
may fix PR652.  Thanks to Andrew for tracking down the problem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24145 91177308-0d34-0410-b5e6-96231b3b80d8
2005-11-02 01:47:04 +00:00
Jim Laskey
5a608ddada 1. Embed and not inherit vector for NodeGroup.
2. Iterate operands and not uses (performance.)

3. Some long pending comment changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24119 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-31 12:49:09 +00:00
Chris Lattner
bf209489ad Significantly simplify this code and make it more aggressive. Instead of having
a special case hack for X86, make the hack more general: if an incoming argument
register is not used in any block other than the entry block, don't copy it to
a vreg.  This helps us compile code like this:

%struct.foo = type { int, int, [0 x ubyte] }
int %test(%struct.foo* %X) {
        %tmp1 = getelementptr %struct.foo* %X, int 0, uint 2, int 100
        %tmp = load ubyte* %tmp1                ; <ubyte> [#uses=1]
        %tmp2 = cast ubyte %tmp to int          ; <int> [#uses=1]
        ret int %tmp2
}

to:

_test:
        lbz r3, 108(r3)
        blr

instead of:

_test:
        lbz r2, 108(r3)
        or r3, r2, r2
        blr

The (dead) copy emitted to copy r3 into a vreg for extra-block uses was
increasing the live range of r3 past the load, preventing the coallescing.

This implements CodeGen/PowerPC/reg-coallesce-simple.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24115 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-30 19:42:35 +00:00
Chris Lattner
a4176525cc Reduce the number of copies emitted as machine instructions by
generating results in vregs that will need them.  In the case of something
like this:  CopyToReg((add X, Y), reg1024), we no longer emit code like
this:

   reg1025 = add X, Y
   reg1024 = reg 1025

Instead, we emit:

   reg1024 = add X, Y

Whoa! :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24111 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-30 18:54:27 +00:00
Chris Lattner
3e6099b05f Codegen mul by negative power of two with a shift and negate.
This implements test/Regression/CodeGen/PowerPC/mul-neg-power-2.ll,
producing:

_foo:
        slwi r2, r3, 1
        subfic r3, r2, 63
        blr

instead of:

_foo:
        mulli r2, r3, -2
        addi r3, r2, 63
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24106 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-30 06:41:49 +00:00
Chris Lattner
fe7f046de8 Fix DSE to not nuke dead stores unless they redundant store is the same
VT as the killing one.  Fix fixes PR491


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24034 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-27 07:10:34 +00:00
Chris Lattner
731d348166 Add a simple xform that is useful for bitfield operations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24029 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-27 05:06:38 +00:00
Chris Lattner
c60e6020c0 Fix some spello's pointed out by Gabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24019 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-26 18:41:41 +00:00
Nate Begeman
b7f6ef12f6 Allow custom lowered FP_TO_SINT ops in the check for whether a larger
FP_TO_SINT is preferred to a larger FP_TO_UINT.  This seems to be begging
for a TLI.isOperationCustom() helper function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23992 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-25 23:47:25 +00:00
Chris Lattner
a158eee313 Clear a bit in this file that was causing a miscompilation of 178.galgel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23980 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-25 18:57:30 +00:00
Chris Lattner
8a6cd98e96 Alkis agrees that that iterative scan allocator isn't going to be worked on
in the future, remove it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23952 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-24 04:14:30 +00:00
Jeff Cohen
66c5fd6c53 When a function takes a variable number of pointer arguments, with a zero
pointer marking the end of the list, the zero *must* be cast to the pointer
type.  An un-cast zero is a 32-bit int, and at least on x86_64, gcc will
not extend the zero to 64 bits, thus allowing the upper 32 bits to be
random junk.

The new END_WITH_NULL macro may be used to annotate a such a function
so that GCC (version 4 or newer) will detect the use of un-casted zero
at compile time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23888 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-23 04:37:20 +00:00
Andrew Lenharth
2a2de66db2 add TargetExternalSymbol
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23886 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-23 03:40:17 +00:00
Chris Lattner
e9936d14b8 BuildSDIV and BuildUDIV only work for i32/i64, but they don't check that
the input is that type, this caused a failure on gs on X86 last night.
Move the hard checks into Build[US]Div since that is where decisions like
this should be made.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23881 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-22 18:50:15 +00:00
Chris Lattner
c8597ca698 add a case missing from the dag combiner that exposed the failure on
2005-10-21-longlonggtu.ll.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23875 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-21 21:23:25 +00:00
Chris Lattner
aa51a484e1 Make the coallescer a bit smarter, allowing it to join more live ranges.
For example, we can now join things like [0-30:0)[31-40:1)[52-59:2)
with [40:60:0) if the 52-59 range is defined by a copy from the 40-60 range.
The resultant range ends up being [0-30:0)[31-60:1).

This fires a lot through-out the test suite (e.g. shrinking bc from
19492 -> 18509 machineinstrs) though most gains are smaller (e.g. about
50 copies eliminated from crafty).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23866 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-21 06:49:50 +00:00
Chris Lattner
9e20d352c2 Fix LiveInterval::getOverlapingRanges to take things in the right order
(an unused method).

Fix the merger so that it can merge ranges like this  [10:12)[16:40) with
[12:38) into [10:40) instead of bogus ranges.  This sort of input will be
possible for the merger coming shortly


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23865 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-21 06:41:30 +00:00
Nate Begeman
4d38567689 Fix a typo in the dag combiner, so that this can work on i64 targets
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23856 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-21 01:51:45 +00:00
Nate Begeman
405e3ecb56 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23853 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-21 00:02:42 +00:00
Chris Lattner
cef6010c64 Fix a conditional so we don't access past the end of the range. Thanks to
Andrew for bringing this to my attn.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23850 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-20 22:50:10 +00:00
Nate Begeman
c6a454e8d5 Fix a couple bugs in the const div stuff where we'd generate MULHS/MULHU
for types that aren't legal, and fail a divisor is less than zero
comparison, which would cause us to drop a subtract.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23846 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-20 17:45:03 +00:00
Chris Lattner
f75f2a0a02 don't use llabs with apparently VC++ doesn't have
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23845 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-20 17:01:00 +00:00
Chris Lattner
8317e12cef Fix order of eval problem from when I refactored this into a function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23844 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-20 16:56:40 +00:00
Chris Lattner
b0fa11ca41 add a new method, play around with some code.
Fix a *bug* in the extendIntervalEndTo method.  In particular, if adding
[2:10) to an interval containing [0:2),[10:30), we produced [0:10),[10,30).
Which is not the most smart thing to do.  Now produce [0:30).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23841 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-20 07:39:25 +00:00
Chris Lattner
f5ce2678f6 Refactor some code, pulling it out into a function. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23839 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-20 06:06:30 +00:00
Nate Begeman
6957523b9d 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23835 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-20 02:15:44 +00:00
Nate Begeman
5dc897b0e4 Teach Legalize how to do something with EXTRACT_ELEMENT when the type of
the pair of elements is a legal type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23804 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-19 00:06:56 +00:00
Nate Begeman
4a95945fa5 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).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23802 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-18 23:23:37 +00:00
Chris Lattner
d222f6ab67 Fix Generic/2005-10-18-ZeroSizeStackObject.ll by not requesting a zero
sized stack object if either the array size or the type size is zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23801 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-18 22:14:06 +00:00
Chris Lattner
2dfa8192ab remove hack
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23797 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-18 22:11:42 +00:00
Chris Lattner
40c62d5069 Fold (select C, load A, load B) -> load (select C, A, B). This happens quite
a lot throughout many programs.  In particular, specfp triggers it a bunch for
constant FP nodes when you have code like  cond ? 1.0 : -1.0.

If the PPC ISel exposed the loads implicit in pic references to external globals,
we would be able to eliminate a load in cases like this as well:

%X = external global int
%Y = external global int
int* %test4(bool %C) {
        %G = select bool %C, int* %X, int* %Y
        ret int* %G
}

Note that this breaks things that use SrcValue's (see the fixme), but since nothing
uses them yet, this is ok.

Also, simplify some code to use hasOneUse() on an SDOperand instead of hasNUsesOfValue directly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23781 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-18 06:04:22 +00:00
Nate Begeman
a0e221dc75 Implement some feedback from Chris re: constant canonicalization
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23777 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-18 00:28:13 +00:00
Nate Begeman
419f8b62f7 Legalize BUILD_PAIR appropriately for upcoming 64 bit PowerPC work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23776 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-18 00:27:41 +00:00
Nate Begeman
11af4eaa6d fold fmul X, +2.0 -> fadd X, X;
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23774 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-17 20:40:11 +00:00
Chris Lattner
854077d3a5 add a trivial fold
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23764 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-17 01:07:11 +00:00
Chris Lattner
750dbd5950 Fix this logic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23756 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-15 22:35:40 +00:00
Chris Lattner
85d63bbff7 Add a case we were missing that was causing us to fail CodeGen/PowerPC/rlwinm.ll:test3
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23755 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-15 22:18:08 +00:00
Chris Lattner
8136cdae60 Use getExtLoad here instead of getNode, as extloads produce two values. This
fixes a legalize failure on SPASS for itanium.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23747 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-15 20:24:07 +00:00
Nate Begeman
216def8ecf fold sext_in_reg, sext_in_reg where both have the same VT. This was
popping up in Fourinarow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23722 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-14 01:29:07 +00:00
Nate Begeman
5054f16212 Relax the checking on zextload generation a bit, since as sabre pointed out
you could be AND'ing with the result of a shift that shifts out all the
bits you care about, in addition to a constant.

Also, move over an add/sub_parts fold from legalize to the dag combiner,
where it works for things other than constants.  Woot!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23720 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-14 01:12:21 +00:00
Chris Lattner
24edbb7a6c Fix the trunc(load) case, finally allowing crafty and povray to pass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23718 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 22:10:05 +00:00
Chris Lattner
f98840531a Fix some bugs in (sext (load x))
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23717 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 21:52:31 +00:00
Chris Lattner
9ad8481cfb When ExpandOp'ing a [SZ]EXTLOAD, make sure to remember that the chain
is also legal.  Add support for ExpandOp'ing raw EXTLOADs too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23716 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 21:44:47 +00:00
Chris Lattner
4c8f8f0481 Implement PromoteOp for *EXTLOAD, allowing MallocBench/gs to Legalize
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23715 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 20:07:41 +00:00
Nate Begeman
bfd65a05c9 Fix the remaining DAGCombiner issues pointed out by sabre. This should fix
the remainder of the failures introduced by my patch last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23714 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 18:34:58 +00:00
Chris Lattner
67a44cd3aa Fix a minor bug in the dag combiner that broke pcompress2 and some other
tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23713 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 18:16:34 +00:00
Nate Begeman
144ff660e6 Add support to Legalize for expanding i64 sextload/zextload into hi and lo
parts. This should fix the crafty and signed long long unit test failure
on x86 last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23711 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 17:15:37 +00:00
Jim Laskey
53c523c00e Inhibit instructions from being pushed before function calls. This will
minimize unnecessary spilling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23710 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 16:44:00 +00:00
Nate Begeman
ded4963ab9 Move some Legalize functionality over to the DAGCombiner where it belongs.
Kill some dead code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23706 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-13 03:11:28 +00:00
Nate Begeman
765784ad76 Fix a potential bug with two combine-to's back to back that chris pointed
out, where after the first CombineTo() call, the node the second CombineTo
wishes to replace may no longer exist.

Fix a very real bug with the truncated load optimization on little endian
targets, which do not need a byte offset added to the load.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23704 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-12 23:18:53 +00:00
Nate Begeman
3df4d525c5 More cool stuff for the dag combiner. We can now finally handle things
like turning:

_foo:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lwz r2, -4(r1)
        rlwinm r3, r2, 0, 16, 31
        blr

into
_foo:
        fctiwz f0,f1
        stfd f0,-8(r1)
        lhz r3,-2(r1)
        blr

Also removed an unncessary constraint from sra -> srl conversion, which
should take care of hte only reason we would ever need to handle sra in
MaskedValueIsZero, AFAIK.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23703 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-12 20:40:40 +00:00
Jim Laskey
fab66f6900 Finally committing to the new scheduler. Still -sched=none by default.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23702 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-12 18:29:35 +00:00
Jim Laskey
851a22db2b Added graphviz/gv support for MF.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23700 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-12 12:09:05 +00:00
Chris Lattner
a179ab3016 Fix a powerpc crash on CodeGen/Generic/llvm-ct-intrinsics.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23694 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-11 17:56:34 +00:00
Chris Lattner
05b57433e6 Add a canonicalization that got lost, fixing PowerPC/fold-li.ll:SUB
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23693 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-11 06:07:15 +00:00
Chris Lattner
04ecf6d65f clean up some corner cases
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23692 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-10 23:00:08 +00:00
Chris Lattner
87514ca04c Implement trivial DSE. If two stores are neighbors and store to the same
location, replace them with a new store of the last value.  This occurs
in the same neighborhood in 197.parser, speeding it up about 1.5%


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23691 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-10 22:31:19 +00:00
Chris Lattner
01a2202138 Add support for CombineTo, allowing the dag combiner to replace nodes with
multiple results.

Use this support to implement trivial store->load forwarding, implementing
CodeGen/PowerPC/store-load-fwd.ll.  Though this is the most simple case and
can be extended in the future, it is still useful.  For example, it speeds
up 197.parser by 6.2% by avoiding an LSU reject in xalloc:

        stw r6, lo16(l5_end_of_array)(r2)
        addi r2, r5, -4
        stwx r5, r4, r2
-       lwzx r5, r4, r2
-       rlwinm r5, r5, 0, 0, 30
        stwx r5, r4, r2
        lwz r2, -4(r4)
        ori r2, r2, 1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23690 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-10 22:04:48 +00:00
Nate Begeman
07ed417df2 Teach the DAGCombiner several new tricks, teaching it how to turn
sext_inreg into zext_inreg based on the signbit (fires a lot), srem into
urem, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23688 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-10 21:26:48 +00:00
Chris Lattner
d739075cbb Fix comment
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23686 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-10 16:52:03 +00:00
Chris Lattner
bba9aa3475 Add ISD::ADD to MaskedValueIsZero
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23685 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-10 16:51:40 +00:00
Chris Lattner
3892560680 This function is now dead
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23684 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-10 16:49:22 +00:00
Chris Lattner
af21d55aee Enable Nate's excellent DAG combiner work by default. This allows the
removal of a bunch of ad-hoc and crufty code from SelectionDAG.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23682 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-10 16:47:10 +00:00
Chris Lattner
a19cea061e add a todo for something I noticed
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23679 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-09 22:59:08 +00:00
Chris Lattner
ee899e6bfc (X & Y) & C == 0 if either X&C or Y&C are zero
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23678 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-09 22:12:36 +00:00
Chris Lattner
089c25ccb3 When emiting a CopyFromReg and the source is already a vreg, do not bother
creating a new vreg and inserting a copy: just use the input vreg directly.

This speeds up the compile (e.g. about 5% on mesa with a debug build of llc)
by not adding a bunch of copies and vregs to be coallesced away.  On mesa,
for example, this reduces the number of intervals from 168601 to 129040
going into the coallescer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23671 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-09 05:58:56 +00:00
Nate Begeman
f845b4563a Lo and behold, the last bits of SelectionDAG.cpp have been moved over.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23665 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-08 00:29:44 +00:00
Chris Lattner
9a9719eea1 remove debugging code
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23663 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-07 15:31:26 +00:00
Chris Lattner
c4ced268d8 implement CodeGen/PowerPC/div-2.ll:test2-4 by propagating zero bits through
C-X's


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23662 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-07 15:30:32 +00:00
Chris Lattner
6c4dad0b8b fix indentation
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23660 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-07 06:37:02 +00:00
Chris Lattner
094c8fcd14 Turn sdivs into udivs when we can prove the sign bits are clear. This
implements CodeGen/PowerPC/div-2.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23659 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-07 06:10:46 +00:00
Chris Lattner
cf5c79b34f silence a bogus GCC warning
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23646 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-06 17:39:10 +00:00
Chris Lattner
8a61a7524a Fix the LLC regressions on X86 last night. In particular, when undoing
previous copy elisions and we discover we need to reload a register, make
sure to use the regclass of the original register for the reload, not the
class of the current register.  This avoid using 16-bit loads to reload 32-bit
values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23645 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-06 17:19:06 +00:00
Chris Lattner
32fca00a23 Make the legalizer completely non-recursive
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23642 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-06 01:20:27 +00:00
Nate Begeman
0558f61b0c Let the combiner handle more cases
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23641 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 21:44:43 +00:00
Nate Begeman
829cb81806 Remove some bad code from Legalize
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23640 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 21:44:10 +00:00
Nate Begeman
e17daebb30 Check in some more DAGCombiner pieces
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23639 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 21:43:42 +00:00
Chris Lattner
22480c4350 Fix a bug in the local spiller, where we could take code like this:
store r12 -> [ss#2]
  R3 = load [ss#1]
  use R3
  R3 = load [ss#2]
  R4 = load [ss#1]

and turn it into this code:

  store R12 -> [ss#2]
  R3 = load [ss#1]
  use R3
  R3 = R12
  R4 = R3    <- oops!

The problem was that promoting R3 = load[ss#2] to a copy missed the fact that
the instruction invalidated R3 at that point.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23638 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 18:30:19 +00:00
Chris Lattner
3ea0b47f81 implement visitBR_CC so that PowerPC/inverted-bool-compares.ll passes
with the dag combiner.  This speeds up espresso by 8%, reaching performance
parity with the dag-combiner-disabled llc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23636 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 06:47:48 +00:00
Chris Lattner
ad13715ed4 fix some pastos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23635 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 06:37:22 +00:00
Chris Lattner
9503859c54 Add a new HandleNode class, which is used to handle (haha) cases in the
dead node elim and dag combiner passes where the root is potentially updated.
This fixes a fixme in the dag combiner.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23634 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 06:35:28 +00:00
Chris Lattner
5c46f74ec7 Implement the code for PowerPC/inverted-bool-compares.ll, even though it
that testcase still does not pass with the dag combiner.  This is because
not all forms of br* are folded yet.

Also, when we combine a node into another one, delete the node immediately
instead of waiting for the node to potentially come up in the future.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23632 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 06:11:08 +00:00
Chris Lattner
d48050aa15 make sure that -view-isel-dags is the input to the isel, not the input to
the second phase of dag combining


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23631 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 06:09:10 +00:00
Chris Lattner
91559026d3 Fix a crash compiling Olden/tsp
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23630 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-05 04:45:43 +00:00
Jim Laskey
9d528dc2b4 Reverting to version - until problem isolated.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23622 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-04 16:41:51 +00:00
Nate Begeman
1aa1972c63 Fix some faulty logic in the libcall inserter.
Since calls return more than one value, don't bail if one of their uses
happens to be a node that's not an MVT::Other when following the chain
from CALLSEQ_START to CALLSEQ_END.

Once we've found a CALLSEQ_START, we can just return; there's no need to
tail-recurse further up the graph.

Most importantly, just because something only has one use doesn't mean we
should use it's one use to follow from start to end.  This faulty logic
caused us to follow a chain of one-use FP operations back to a much earlier
call, putting a cycle in the graph from a later start to an earlier end.

This is a better fix that reverting to the workaround committed earlier
today.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23620 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-04 02:10:55 +00:00
Nate Begeman
27d404ccd1 Add back a workaround that fixes some breakages from chris's last change.
Neither of us have yet figured out why this code is necessary, but stuff
breaks if its not there.  Still tracking this down...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23617 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-04 00:37:37 +00:00
Jim Laskey
8ba732bb1c Refactor gathering node info and emission.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23610 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-03 12:30:32 +00:00
Chris Lattner
6db0756f02 clean up this code a bit, no functionality change
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23609 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-03 07:22:07 +00:00
Chris Lattner
53a79aaae9 Break the body of the loop out into a new method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23606 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-03 04:47:08 +00:00
Chris Lattner
ab510a76d6 Fix a problem where the legalizer would run out of stack space on extremely
large basic blocks because it was purely recursive.  This switches it to an
iterative/recursive hybrid.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23596 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-02 17:49:46 +00:00
Chris Lattner
dcd5abc70c silence a bogus warning
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23595 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-02 16:30:51 +00:00
Chris Lattner
a3638c0f1f Add assertions to the trivial scheduler to check that the value types match
up between defs and uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23590 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-02 07:10:55 +00:00
Chris Lattner
14765be0bc Codegen CopyFromReg using the regclass that matches the valuetype of the
destination vreg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23586 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-02 06:34:16 +00:00
Chris Lattner
505277a7f5 Add some very paranoid checking for operand/result reg class matchup
For instructions that define multiple results, use the right regclass
to define the result, not always the rc of result #0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23580 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-01 07:45:09 +00:00
Jeff Cohen
2aeaf4e839 Fix VC++ warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23579 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-01 03:57:14 +00:00
Chris Lattner
37345fe3cd add a method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23575 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-01 00:17:07 +00:00
Jim Laskey
22f6212e9f typo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23574 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-01 00:08:23 +00:00
Jim Laskey
41755e2c7e 1. Simplify the gathering of node groups.
2. Printing node groups when displaying nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23573 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-01 00:03:07 +00:00
Jim Laskey
b6d4c2cf2d 1. Made things node-centric (from operand).
2. Added node groups to handle flagged nodes.

3. Started weaning simple scheduling off existing emitter.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23566 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-30 19:15:27 +00:00
Chris Lattner
8fb040e584 now that we have a reg class to spill with, get this info from the regclass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23559 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-30 17:19:22 +00:00
Chris Lattner
80a4f169b4 Now that we have getCalleeSaveRegClasses() info, use it to pass the register
class into the spill/reload methods.  Targets can now rely on that argument.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23556 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-30 16:59:07 +00:00
Chris Lattner
bf9716b9c4 Change this code ot pass register classes into the stack slot spiller/reloader
code.  PrologEpilogInserter hasn't been updated yet though, so targets cannot
use this info.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23536 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-30 01:29:00 +00:00
Chris Lattner
473a99073c Fix two bugs in my patch earlier today that broke int->fp conversion on X86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23522 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-29 06:44:39 +00:00
Jeff Cohen
fef80f43e0 Silence VC++ redeclaration warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23516 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-29 01:59:49 +00:00
Chris Lattner
01b3d73c20 Add FP versions of the binary operators, keeping the int and fp worlds seperate.
Though I have done extensive testing, it is possible that this will break
things in configs I can't test.  Please let me know if this causes a problem
and I'll fix it ASAP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23504 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-28 22:28:18 +00:00
Chris Lattner
6c38b33613 If the target prefers it, use _setjmp/_longjmp should be used instead of setjmp/longjmp for llvm.setjmp/llvm.longjmp.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23481 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-27 22:15:53 +00:00
Chris Lattner
8e6be8b921 initialize new flag
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23480 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-27 22:13:56 +00:00
Jim Laskey
5324fec644 Remove some redundancies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23469 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-27 17:32:45 +00:00
Jim Laskey
e6b90fba4a Addition of a simple two pass scheduler. This version is currently hacked up
for testing and will require target machine info to do a proper scheduling.
The simple scheduler can be turned on using -sched=simple (defaults
to -sched=none)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23455 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-26 21:57:04 +00:00
Chris Lattner
5ae7911b24 Turn (X^C1) == C2 into X == C1^C2 iff X&~C1 = 0 (and move a function)
This happens all the time on PPC for bool values, e.g. eliminating a xori
in inverted-bool-compares.ll.

This should be added to the dag combiner as well.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23403 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-23 00:55:52 +00:00
Chris Lattner
3c3fe462f7 Expose the LiveInterval interfaces as public headers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23400 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-21 04:19:09 +00:00
Nate Begeman
44728a7bb6 Stub out the rest of the DAG Combiner. Just need to fill in the
select_cc bits and then wrap it in a convenience function for  use with
regular select.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23389 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 22:34:01 +00:00
Chris Lattner
cea8688ee4 Teach the local spiller to turn stack slot loads into register-register copies
when possible, avoiding the load (and avoiding the copy if the value is already
in the right register).

This patch came about when I noticed code like the following being generated:

  store R17 -> [SS1]
  ...blah...
  R4 = load [SS1]

This was causing an LSU reject on the G5.  This problem was due to the register
allocator folding spill code into a reg-reg copy (producing the load), which
prevented the spiller from being able to rewrite the load into a copy, despite
the fact that the value was already available in a register.  In the case
above, we now rip out the R4 load and replace it with a R4 = R17 copy.

This speeds up several programs on X86 (which spills a lot :) ), e.g.
smg2k from 22.39->20.60s, povray from 12.93->12.66s, 168.wupwise from
68.54->53.83s (!), 197.parser from 7.33->6.62s (!), etc.  This may have a larger
impact in some cases on the G5 (by avoiding LSU rejects), though it probably
won't trigger as often (less spilling in general).

Targets that implement folding of loads/stores into copies should implement
the isLoadFromStackSlot hook to get this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23388 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-19 06:56:21 +00:00
Nate Begeman
452d7bebaa More DAG combining. Still need the branch instructions, and select_cc
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23371 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-16 00:54:12 +00:00
Chris Lattner
fa57702388 If a function has liveins, and if the target requested that they be plopped
into particular vregs, emit copies into the entry MBB.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23331 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-13 19:30:54 +00:00
Chris Lattner
13d58e71b7 Allow targets to say they don't support truncstore i1 (which includes a mask
when storing to an 8-bit memory location), as most don't.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23303 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-10 00:20:18 +00:00
Chris Lattner
a500fc681d Add a missing #include, patch courtesy of Baptiste Lepilleur.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23302 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-09 23:53:39 +00:00
Chris Lattner
3ec5d74fc5 Fix a problem duraid encountered on itanium where this folding:
select (x < y), 1, 0 -> (x < y) incorrectly: the setcc returns i1 but the
select returned i32.  Add the zero extend as needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23301 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-09 23:00:07 +00:00
Chris Lattner
08addbd477 Fix a crash viewing dags that have target nodes in them
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23300 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-09 22:35:03 +00:00
Chris Lattner
50ea01ed5b Use continue in the use-processing loop to make it clear what the early exits
are, simplify logic, and cause things to not be nested as deeply.  This also
uses MRI->areAliases instead of an explicit loop.

No functionality change, just code cleanup.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23296 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-09 20:29:51 +00:00
Nate Begeman
39ee1ac7e5 Last round of 2-node folds from SD.cpp. Will move on to 3 node ops such
as setcc and select next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23295 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-09 19:49:52 +00:00
Chris Lattner
ceb0a52231 remove debugging code *slaps head*
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23294 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-09 19:19:20 +00:00
Chris Lattner
b11443dc84 When spilling a live range that is used multiple times by one instruction,
only add a reload live range once for the instruction.  This is one step
towards fixing a regalloc pessimization that Nate notice, but is later undone
by the spiller (so no code is changed).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23293 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-09 19:17:47 +00:00
Nate Begeman
223df2269d Move yet more folds over to the dag combiner from sd.cpp
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23278 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-08 20:18:10 +00:00
Nate Begeman
9980119270 Another round of dag combiner changes. This fixes some missing XOR folds
as well as fixing how we replace old values with new values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23260 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-07 23:25:52 +00:00
Chris Lattner
dc6e2e0a5f Fix a bug that Tzu-Chien Chiu noticed: live interval analysis does NOT
preserve livevar


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23259 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-07 17:34:39 +00:00
Nate Begeman
f89d78d7c7 Implement a common missing fold, (add (add x, c1), c2) -> (add x, c1+c2).
This restores all of stanford to being identical with and without the dag
combiner with the add folding turned off in sd.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23258 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-07 16:09:19 +00:00
Chris Lattner
1e111c7bbb Fix a bug nate ran into with replacealluseswith. In the recursive cse case,
we were losing a node, causing an assertion to fail.  Now we eagerly delete
discovered CSE's, and provide an optional vector to keep track of these
discovered equivalences.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23255 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-07 05:37:01 +00:00
Nate Begeman
2300f55046 Add an option to the DAG Combiner to enable it for beta runs, and turn on
that option for PowerPC's beta.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23253 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-07 00:15:36 +00:00
Nate Begeman
83e75ecd27 Next round of DAGCombiner changes. This version now passes all the tests
I have run so far when run before Legalize.  It still needs to pick up the
SetCC folds, and nodes that use SetCC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23243 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-06 04:43:02 +00:00
Chris Lattner
6a8a21ced4 Fix a checking failure in gs
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23235 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-03 01:04:40 +00:00
Nate Begeman
646d7e2727 Next round of DAG Combiner changes. Just need to support multiple return
values, and then we should be able to hook it up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23231 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 21:18:40 +00:00
Chris Lattner
6fdcb250d5 Clean up some code from the last checkin
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23229 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 20:32:45 +00:00
Chris Lattner
99c25b86aa Fix a bug in legalize where it would emit two calls to libcalls that return
i64 values on targets that need that expanded to 32-bit registers.  This fixes
PowerPC/2005-09-02-LegalizeDuplicatesCalls.ll and speeds up 189.lucas from
taking 122.72s to 81.96s on my desktop.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23228 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 20:26:58 +00:00
Chris Lattner
70b9b1098a Make sure to auto-cse nullary ops
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23224 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 19:36:17 +00:00
Chris Lattner
6621e3b963 Fix some buggy logic where we would try to remove nodes with two operands
from the binary ops map, even if they had multiple results.  This latent bug
caused a few failures with the dag isel last night.

To prevent stuff like this from happening in the future, add some really
strict checking to make sure that the CSE maps always match up with reality!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23221 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 19:15:44 +00:00
Chris Lattner
fd88f64934 Don't create zero sized stack objects even for array allocas with a zero
number of elements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23219 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 18:41:28 +00:00
Chris Lattner
a639a43602 Fix the release build, noticed by Eric van Riet Paap
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23215 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 07:09:28 +00:00
Chris Lattner
08951a32fb Make sure to legalize assert[zs]ext's operand correctly
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23208 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 01:15:01 +00:00
Chris Lattner
5ab6f5fe66 Teach live intervals to not crash on dead livein regs
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23206 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 00:20:32 +00:00
Chris Lattner
fab08875b7 For values that are live across basic blocks and need promotion, use ANY_EXTEND
instead of ZERO_EXTEND to eliminate extraneous extensions.  This eliminates
dead zero extensions on formal arguments and other cases on PPC, implementing
the newly tightened up test/Regression/CodeGen/PowerPC/small-arguments.ll test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23205 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 00:19:37 +00:00
Chris Lattner
13c78e2e5f legalize ANY_EXTEND appropriately
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23204 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 00:18:10 +00:00
Chris Lattner
4ed11b4b79 Add support for ANY_EXTEND and add a few minor folds for it
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23203 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-02 00:17:32 +00:00
Nate Begeman
39f60a2302 Fix some code in the current node combining code, spotted when it was moved
over to DAGCombiner.cpp

1. Don't assume that SetCC returns i1 when folding (xor (setcc) constant)
2. Don't duplicate code in folding AND with AssertZext that is handled by
   MaskedValueIsZero


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23196 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01 23:25:49 +00:00
Nate Begeman
4ebd805c6a Implement first round of feedback from chris (there's still a couple things
left to do).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23195 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01 23:24:04 +00:00
Chris Lattner
da8abb0239 It is NDEBUG not _NDEBUG
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23186 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01 18:44:10 +00:00
Nate Begeman
4942a9687d Add the rest of the currently implemented visit routines to the switch
statement in visit().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23185 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01 00:33:32 +00:00
Nate Begeman
1d4d414111 First pass at the DAG Combiner. It isn't used anywhere yet, but it should
be mostly functional.  It currently has all folds from SelectionDAG.cpp
that do not involve a condition code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23184 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-01 00:19:25 +00:00
Chris Lattner
a1f68ca94e If a function has live ins/outs, print them
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23181 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 22:34:59 +00:00
Chris Lattner
50ec897904 Allow targets to custom expand shifts that are too large for their registers
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23173 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 19:01:53 +00:00
Jeff Cohen
7383ce4127 Fix VC++ precedence warnings
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23169 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 02:47:06 +00:00
Nate Begeman
fe75a2836a Sigh, not my day. Fix typo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23166 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 00:43:49 +00:00
Nate Begeman
9f52f2838d Fix a mistake in my previous patch pointed out by sabre; the AssertZext
case in MaskedValueIsZero was wrong.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23165 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 00:43:08 +00:00
Nate Begeman
b85dfab889 Remove some unnecessary casts, and add the AssertZext case to
MaskedValueIsZero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23164 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-31 00:27:53 +00:00
Chris Lattner
0fdd768094 Allow physregs to occur in the dag with multiple types. Though I don't likethis, it is a requirement on PPC, which can have an f32 value in r3 at onepoint in a function and a f64 value in r3 at another point. :(
This fixes compilation of mesa


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23161 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 22:38:38 +00:00
Chris Lattner
e836ad6736 When checking the fixed intervals, don't forget to check for register aliases.
This fixes PR621 and Regression/CodeGen/X86/2005-08-30-RegAllocAliasProblem.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23158 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 21:03:36 +00:00
Chris Lattner
cc0675a4be Fix FreeBench/fourinarow with the dag isel, by not adding a bogus result
to SHIFT_PARTS nodes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23151 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 17:21:17 +00:00
Chris Lattner
ec176e30d6 Fix a miscompile of PtrDist/bc. Sign extending bools is not the right thing,
at least tends to expose problems elsewhere.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23149 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 16:56:19 +00:00
Nate Begeman
5ffcd9b56c Remove a bogus piece of my AssertSext/AssertZext patch. oops.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23148 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 02:54:28 +00:00
Nate Begeman
56eb86806d Add support for AssertSext and AssertZext, folding other extensions with
them.  This allows for elminination of redundant extends in the entry
blocks of functions on PowerPC.

Add support for i32 x i32 -> i64 multiplies, by recognizing when the inputs
to ISD::MUL in ExpandOp are actually just extended i32 values and not real
i64 values.  this allows us to codegen

int mulhs(int a, int b) { return ((long long)a * b) >> 32; }
as:
_mulhs:
        mulhw r3, r4, r3
        blr

instead of:
_mulhs:
        mulhwu r2, r4, r3
        srawi r5, r3, 31
        mullw r5, r4, r5
        add r2, r2, r5
        srawi r4, r4, 31
        mullw r3, r4, r3
        add r3, r2, r3
        blr

with a similar improvement on x86.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23147 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 02:44:00 +00:00
Chris Lattner
f155635b53 Name this variable to be what it really is!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23145 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 01:58:51 +00:00
Chris Lattner
55334fc45c Handle CopyToReg nodes with flag operands correctly
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23144 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-30 01:57:23 +00:00
Chris Lattner
82e14db9a9 Add a hack to avoid some horrible code in some cases by always emitting
token chains first.  For this C function:

int test() {
  int i;
  for (i = 0; i < 100000; ++i)
    foo();
}

Instead of emitting this (condition before call)

.LBB_test_1:    ; no_exit
        addi r30, r30, 1
        lis r2, 1
        ori r2, r2, 34464
        cmpw cr2, r30, r2
        bl L_foo$stub
        bne cr2, .LBB_test_1    ; no_exit

Emit this:

.LBB_test_1:    ; no_exit
        bl L_foo$stub
        addi r30, r30, 1
        lis r2, 1
        ori r2, r2, 34464
        cmpw cr0, r30, r2
        bne cr0, .LBB_test_1    ; no_exit

Which makes it so we don't have to save/restore cr2 in the prolog/epilog of
the function.

This also makes the code much more similar to what the pattern isel produces.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23135 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 23:21:29 +00:00
Chris Lattner
c26aefa15a Add a new API for Nate
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23131 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 21:59:31 +00:00
Andrew Lenharth
5e3efbc2ca Some of us cared about the the promote path
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23130 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 20:46:51 +00:00
Chris Lattner
507f752f6e Fix an infinite loop on x86
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23129 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 17:30:00 +00:00
Chris Lattner
dfd58709cc Fix a bug in my previous patch that was using the wrong iterator. This fixes
Olden/bisort among others.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23124 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-29 00:10:46 +00:00
Chris Lattner
ff01698ec0 Fix a bug in ReplaceAllUsesWith
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23122 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-28 23:59:36 +00:00
Reid Spencer
0f9beca707 Change the names of member variables per Chris' instructions, and document
them more clearly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23118 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-27 19:09:02 +00:00
Chris Lattner
88b9c15912 Disable this code, which broke many tests last night
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23114 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-27 16:16:51 +00:00
Chris Lattner
620c93cca1 fix PHI node emission for basic blocks that have select_cc's in them on ppc32
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23113 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-27 00:58:02 +00:00
Chris Lattner
eb150d7d1f Nate noticed that Andrew never did this. This fixes PR600
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23110 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 22:50:40 +00:00
Chris Lattner
9d3a483a38 Don't copy regs that are only used in the entry block into a vreg. This
changes the code generated for:

short %test(short %A) {
  %B = xor short %A, -32768
  ret short %B
}

to:

_test:
        xori r2, r3, 32768
        xoris r2, r2, 65535
        extsh r3, r2
        blr

instead of:

_test:
        rlwinm r2, r3, 0, 16, 31
        xori r2, r3, 32768
        xoris r2, r2, 65535
        extsh r3, r2
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23109 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 22:49:59 +00:00
Chris Lattner
ed461e0faf Make this code safe for when loadRegFromStackSlot inserts multiple instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23108 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 22:18:32 +00:00
Chris Lattner
579cfabdad Checking types here is not safe, because multiple types can map to the same
register class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23103 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 21:39:15 +00:00
Chris Lattner
025c39bf36 Call the InsertAtEndOfBasicBlock hook if the usesCustomDAGSchedInserter
flag is set on an instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23098 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 20:54:47 +00:00
Chris Lattner
8b52f21f10 Revampt ReplaceAllUsesWith to be more efficient and easier to use.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23087 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 18:36:28 +00:00
Chris Lattner
5839bf2b3b Change ConstantPoolSDNode to actually hold the Constant itself instead of
putting it into the constant pool.  This allows the isel machinery to
create constants that it will end up deciding are not needed, without them
ending up in the resultant function constant pool.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23081 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 17:15:30 +00:00
Chris Lattner
2bb06cdf27 Fix a huge annoyance: SelectNodeTo took types before the opcode unlike
every other SD API.  Fix it to take the opcode before the types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23079 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 16:36:26 +00:00
Chris Lattner
d7050a9c50 the 5th operand is the 4th number
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23074 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 00:43:46 +00:00
Chris Lattner
23004e5f21 Add support for targets that want to custom expand select_cc in some cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23071 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 00:23:59 +00:00
Chris Lattner
07dffd6af6 Allow LowerOperation to return a null SDOperand in case it wants to lower
some things given to it, but not all.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23070 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 00:14:16 +00:00
Chris Lattner
f07d023dd9 Fix a nasty bug from a previous patch of mine
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23069 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-26 00:13:12 +00:00
Nate Begeman
1999b4b974 New fold for SELECT_CC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23058 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 20:04:38 +00:00
Chris Lattner
43247a157b Don't auto-cse nodes that return flags
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23055 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 19:12:10 +00:00
Chris Lattner
9d338cf3a3 simplify the code a bit using isOperationLegal
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23053 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 17:54:58 +00:00
Chris Lattner
376d54f9b6 Add support for flag operands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23050 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 17:48:54 +00:00
Chris Lattner
4025a9c2cc ADd support for TargetConstantPool nodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23041 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 05:03:06 +00:00
Chris Lattner
afb2dd43de add a new TargetFrameIndex node
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23035 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-25 00:43:01 +00:00
Chris Lattner
7651fa4a7e add a method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23027 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 23:00:29 +00:00
Chris Lattner
7b2880c4cd Add ReplaceAllUsesWith that can take a vector of replacement values.
Add some foldings to hopefully help the illegal setcc issue, and move some code around.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23025 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 22:44:39 +00:00
Chris Lattner
14b392af1d Add support for external symbols, and support for variable arity instructions
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23022 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 22:02:41 +00:00
Chris Lattner
e39db07713 Fix pasto that prevented VT ndoes from showing up in -view-isel-dags correctly
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23021 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 18:30:00 +00:00
Chris Lattner
1d6373c1af teach selection dag mask tracking about the fact that select_cc operates like
select.  Also teach it that the bit count instructions can only set the low bits
of the result, depending on the size of the input.

This allows us to compile this:

int %eq0(int %a) {
        %tmp.1 = seteq int %a, 0                ; <bool> [#uses=1]
        %tmp.2 = cast bool %tmp.1 to int                ; <int> [#uses=1]
        ret int %tmp.2
}

To this:

_eq0:
        cntlzw r2, r3
        srwi r3, r2, 5
        blr

instead of this:

_eq0:
        cntlzw r2, r3
        rlwinm r3, r2, 27, 31, 31
        blr

when setcc is marked illegal on ppc (which restores parity to non-illegal
setcc).  Thanks to Nate for pointing this out.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23013 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 16:46:55 +00:00
Chris Lattner
c9c60f6429 Start using isOperationLegal and isTypeLegal to simplify the code
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23012 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 16:35:28 +00:00
Chris Lattner
9ed62c16f2 Adjust to new interface
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23010 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 16:34:12 +00:00
Nate Begeman
cebd433d8d Teach SelectionDAG how to simplify a few more setcc-equivalent select_cc
nodes so that backends don't have to.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22999 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 04:57:57 +00:00
Chris Lattner
82cfa5d616 Make -view-isel-dags show the dag before instruction selecting, in case
the target isel crashes due to unimplemented features like calls :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22997 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 00:34:29 +00:00
Nate Begeman
0750a40a4f Fix optimization of select_cc seteq X, 0, 1, 0 -> srl (ctlz X), log2 X size
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22995 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 00:21:28 +00:00
Chris Lattner
657b4d1ac6 Implement LiveVariables.h change
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22994 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-24 00:09:33 +00:00
Chris Lattner
44b94c2185 adjust to new live variables interface
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22992 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 23:42:17 +00:00
Chris Lattner
ab4b66d4c2 Simplify this code by using higher-level LiveVariables methods
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22989 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 22:51:41 +00:00
Chris Lattner
b980578b41 Keep track of which registers are related to which other registers.
Use this information to avoid doing expensive interval intersections for
registers that could not possible be interesting.  This speeds up linscan
on ia64 compiling kc++ in release mode from taking 7.82s to 4.8s(!), total
itanium llc time on this program is 27.3s now.  This marginally speeds up
PPC and X86, but they appear to be limited by other parts of linscan, not
this code.

On this program, on itanium, live intervals now takes 41% of llc time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22986 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 22:27:31 +00:00
Nate Begeman
7042f15bde Teach the SelectionDAG how to transform select_cc eq, X, 0, 1, 0 into
either seteq X, 0 or srl (ctlz X), size(X-1), depending on what's legal
for the target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22978 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 05:41:12 +00:00
Nate Begeman
b942a3dd5f Teach Legalize how to turn setcc into select_cc
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22977 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-23 04:29:48 +00:00
Chris Lattner
a411cbca5c Try to avoid scanning the fixed list. On architectures with a non-stupid
number of regs (e.g. most riscs), many functions won't need to use callee
clobbered registers.  Do a speculative check to see if we can get a free
register without processing the fixed list (which has all of these).  This
saves a lot of time on machines with lots of callee clobbered regs (e.g.
ppc and itanium, also x86).

This reduces ppc llc compile time from 184s -> 172s on kc++.  This is probably
worth FAR FAR more on itanium though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22972 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 20:59:30 +00:00
Chris Lattner
a6c1750362 Move some code in the register assignment case that only needs to happen if
we spill out of the fast path.  The scan of active_ and the calls to
updateSpillWeights don't need to happen unless a spill occurs.  This reduces
debug llc time of kc++ with ppc from 187.3s to 183.2s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22971 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 20:20:42 +00:00
Chris Lattner
8f03405ee5 Fix a problem where constant expr shifts would not have their shift amount
promoted to the right type.  This fixes: IA64/2005-08-22-LegalizerCrash.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22969 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 17:28:31 +00:00
Chris Lattner
f8355d9846 Speed up this loop a bit, based on some observations that Nate made, and
add some comments.  This loop really needs to be reevaluated!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22966 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 16:55:22 +00:00
Chris Lattner
23553cfb4a Add a fast-path for register values. Add support for constant pool entries,
allowing us to compile this:

float %test2(float* %P) {
        %Q = load float* %P
        %R = add float %Q, 10.1
        ret float %R
}

to this:

_test2:
        lfs r2, 0(r3)
        lis r3, ha16(.CPI_test2_0)
        lfs r3, lo16(.CPI_test2_0)(r3)
        fadds f1, r2, r3
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22962 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-22 01:04:32 +00:00
Chris Lattner
c975e1dedc add anew method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22957 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-21 22:30:30 +00:00
Chris Lattner
81e72b13d7 Add support for frame index nodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22956 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-21 19:56:04 +00:00
Chris Lattner
99baddaf57 add a method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22955 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-21 19:48:59 +00:00
Chris Lattner
6b09a29604 add a method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22949 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-21 18:49:33 +00:00
Chris Lattner
f85ab15acf Add support for basic blocks, fix a bug in result # computation
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22948 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-21 18:49:29 +00:00
Chris Lattner
550b1e59c4 When legalizing brcond ->brcc or select -> selectcc, make sure to truncate
the old condition to a one bit value.  The incoming value must have been
promoted, and the top bits are undefined.  This causes us to generate:

_test:
        rlwinm r2, r3, 0, 31, 31
        li r3, 17
        cmpwi cr0, r2, 0
        bne .LBB_test_2 ;
.LBB_test_1:    ;
        li r3, 1
.LBB_test_2:    ;
        blr

instead of:

_test:
        rlwinm r2, r3, 0, 31, 31
        li r2, 17
        cmpwi cr0, r3, 0
        bne .LBB_test_2 ;
.LBB_test_1:    ;
        li r2, 1
.LBB_test_2:    ;
        or r3, r2, r2
        blr

for:

int %test(bool %c) {
        %retval = select bool %c, int 17, int 1
        ret int %retval
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22947 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-21 18:03:09 +00:00
Chris Lattner
fe0c2c8721 fix bogus warning
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22943 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-20 18:07:27 +00:00
Chris Lattner
9b78db7f16 Add support for global address nodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22940 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 22:38:24 +00:00
Chris Lattner
aaaa0b67dd Add support for TargetGlobalAddress nodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22938 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 22:31:04 +00:00
Chris Lattner
7ef330478f Implement CopyFromReg, TokenFactor, and fix a bug in CopyToReg. This allows
us to compile stuff like this:

double %test(double %A, double %B, double %C, double %E) {
        %F = mul double %A, %A
        %G = add double %F, %B
        %H = sub double -0.0, %G
        %I = mul double %H, %C
        %J = add double %I, %E
        ret double %J
}

to:

_test:
        fnmadd f0, f1, f1, f2
        fmadd f1, f0, f3, f4
        blr

woot!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22937 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 21:43:53 +00:00
Chris Lattner
fa164b61d1 Fix a bug in previous commit
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22936 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 21:34:13 +00:00
Chris Lattner
7228aa7868 Print physreg register nodes with target names (e.g. F1) instead of numbers
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22934 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 21:21:16 +00:00
Chris Lattner
0189197608 Before implementing copyfromreg, we'll implement copytoreg correctly.
This gets us this for the previous testcase:

_test:
        lis r2, 0
        ori r3, r2, 65535
        blr

Note that we actually write to r3 (the return reg) correctly now :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22933 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 20:50:53 +00:00
Chris Lattner
4ccd406317 Now that we have operand info for machine instructions, use it to create
temporary registers for things that define a register.  This allows dag->dag
isel to compile this:

int %test() { ret int 65535 }

into:

_test:
        lis r2, 0
        ori r2, r2, 65535
        blr

Next up, getting CopyFromReg to work, allowing arguments and cross-bb values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22932 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 20:45:43 +00:00
Jeff Cohen
23c73a1823 Fix VC++ constant truncation warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22907 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 16:19:21 +00:00
Jeff Cohen
a92b7c36e9 Fix VC++ precedence warning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22902 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 04:39:48 +00:00
Chris Lattner
ca6aa2f70c Fix computation of # operands, add a temporary hack for CopyToReg
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22896 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-19 01:01:34 +00:00
Chris Lattner
068ca15d5e add a new -view-sched-dags option to view dags as they are sent to the scheduler.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22878 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-18 20:11:49 +00:00
Chris Lattner
2d973e45b8 Implement the first chunk of a code emitter. This is sophisticated enough to
codegen:

_empty:
.LBB_empty_0:   ;
        blr

but can't do anything more (yet). :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22876 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-18 20:07:59 +00:00
Chris Lattner
d32b23690d new file, obviously just a stub
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22868 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-18 18:45:24 +00:00
Chris Lattner
36b708f057 Enable critical edge splitting by default
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22863 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-18 17:35:14 +00:00
Nate Begeman
294a0a103d Add support for target DAG nodes that take 4 operands, such as PowerPC's
rlwinm.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22856 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-18 07:30:15 +00:00
Chris Lattner
a23e8154dc Fix printing of VTSDNodes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22853 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-18 03:31:02 +00:00
Jim Laskey
58b968be85 Move the code dependency for MathExtras.h from SelectionDAGNodes.h.
Added some class dividers in SelectionDAG.cpp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22841 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 20:08:02 +00:00
Jim Laskey
cb6682fa44 Culling out use of unions for converting FP to bits and vice versa.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22838 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 19:34:49 +00:00
Chris Lattner
8b8749f367 Fix a bug in RemoveDeadNodes where it would crash when its "optional"
argument is not specified.

Implement ReplaceAllUsesWith.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22834 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 19:00:20 +00:00
Jim Laskey
02659d2363 Switched to using BitsToDouble for int_to_float to avoid aliasing problem.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22831 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 17:42:52 +00:00
Jim Laskey
491dfa88e4 Change hex float constants for the sake of VC++.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22828 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 09:44:59 +00:00
Chris Lattner
495a0b5191 Add a new beta option for critical edge splitting, to avoid a problem that
Nate noticed in yacr2 (and I know occurs in other places as well).

This is still rough, as the critical edge blocks are not intelligently placed
but is added to get some idea to see if this improves performance.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22825 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 06:37:43 +00:00
Chris Lattner
fae59b99b8 Fix a regression on X86, where FP values can be promoted too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22822 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 06:06:25 +00:00
Jim Laskey
6269ed125f Added generic code expansion for [signed|unsigned] i32 to [f32|f64] casts in the
legalizer.  PowerPC now uses this expansion instead of ISel version.

Example:

// signed integer to double conversion
double f1(signed x) {
  return (double)x;
}

// unsigned integer to double conversion
double f2(unsigned x) {
  return (double)x;
}

// signed integer to float conversion
float f3(signed x) {
  return (float)x;
}

// unsigned integer to float conversion
float f4(unsigned x) {
  return (float)x;
}


Byte Code:

internal fastcc double %_Z2f1i(int %x) {
entry:
        %tmp.1 = cast int %x to double          ; <double> [#uses=1]
        ret double %tmp.1
}

internal fastcc double %_Z2f2j(uint %x) {
entry:
        %tmp.1 = cast uint %x to double         ; <double> [#uses=1]
        ret double %tmp.1
}

internal fastcc float %_Z2f3i(int %x) {
entry:
        %tmp.1 = cast int %x to float           ; <float> [#uses=1]
        ret float %tmp.1
}

internal fastcc float %_Z2f4j(uint %x) {
entry:
        %tmp.1 = cast uint %x to float          ; <float> [#uses=1]
        ret float %tmp.1
}

internal fastcc double %_Z2g1i(int %x) {
entry:
        %buffer = alloca [2 x uint]             ; <[2 x uint]*> [#uses=3]
        %tmp.0 = getelementptr [2 x uint]* %buffer, int 0, int 0                ; <uint*> [#uses=1]
        store uint 1127219200, uint* %tmp.0
        %tmp.2 = cast int %x to uint            ; <uint> [#uses=1]
        %tmp.3 = xor uint %tmp.2, 2147483648            ; <uint> [#uses=1]
        %tmp.5 = getelementptr [2 x uint]* %buffer, int 0, int 1                ; <uint*> [#uses=1]
        store uint %tmp.3, uint* %tmp.5
        %tmp.9 = cast [2 x uint]* %buffer to double*            ; <double*> [#uses=1]
        %tmp.10 = load double* %tmp.9           ; <double> [#uses=1]
        %tmp.13 = load double* cast (long* %signed_bias to double*)             ; <double> [#uses=1]
        %tmp.14 = sub double %tmp.10, %tmp.13           ; <double> [#uses=1]
        ret double %tmp.14
}

internal fastcc double %_Z2g2j(uint %x) {
entry:
        %buffer = alloca [2 x uint]             ; <[2 x uint]*> [#uses=3]
        %tmp.0 = getelementptr [2 x uint]* %buffer, int 0, int 0                ; <uint*> [#uses=1]
        store uint 1127219200, uint* %tmp.0
        %tmp.1 = getelementptr [2 x uint]* %buffer, int 0, int 1                ; <uint*> [#uses=1]
        store uint %x, uint* %tmp.1
        %tmp.4 = cast [2 x uint]* %buffer to double*            ; <double*> [#uses=1]
        %tmp.5 = load double* %tmp.4            ; <double> [#uses=1]
        %tmp.8 = load double* cast (long* %unsigned_bias to double*)            ; <double> [#uses=1]
        %tmp.9 = sub double %tmp.5, %tmp.8              ; <double> [#uses=1]
        ret double %tmp.9
}

internal fastcc float %_Z2g3i(int %x) {
entry:
        %buffer = alloca [2 x uint]             ; <[2 x uint]*> [#uses=3]
        %tmp.0 = getelementptr [2 x uint]* %buffer, int 0, int 0                ; <uint*> [#uses=1]
        store uint 1127219200, uint* %tmp.0
        %tmp.2 = cast int %x to uint            ; <uint> [#uses=1]
        %tmp.3 = xor uint %tmp.2, 2147483648            ; <uint> [#uses=1]
        %tmp.5 = getelementptr [2 x uint]* %buffer, int 0, int 1                ; <uint*> [#uses=1]
        store uint %tmp.3, uint* %tmp.5
        %tmp.9 = cast [2 x uint]* %buffer to double*            ; <double*> [#uses=1]
        %tmp.10 = load double* %tmp.9           ; <double> [#uses=1]
        %tmp.13 = load double* cast (long* %signed_bias to double*)             ; <double> [#uses=1]
        %tmp.14 = sub double %tmp.10, %tmp.13           ; <double> [#uses=1]
        %tmp.16 = cast double %tmp.14 to float          ; <float> [#uses=1]
        ret float %tmp.16
}

internal fastcc float %_Z2g4j(uint %x) {
entry:
        %buffer = alloca [2 x uint]             ; <[2 x uint]*> [#uses=3]
        %tmp.0 = getelementptr [2 x uint]* %buffer, int 0, int 0                ; <uint*> [#uses=1]
        store uint 1127219200, uint* %tmp.0
        %tmp.1 = getelementptr [2 x uint]* %buffer, int 0, int 1                ; <uint*> [#uses=1]
        store uint %x, uint* %tmp.1
        %tmp.4 = cast [2 x uint]* %buffer to double*            ; <double*> [#uses=1]
        %tmp.5 = load double* %tmp.4            ; <double> [#uses=1]
        %tmp.8 = load double* cast (long* %unsigned_bias to double*)            ; <double> [#uses=1]
        %tmp.9 = sub double %tmp.5, %tmp.8              ; <double> [#uses=1]
        %tmp.11 = cast double %tmp.9 to float           ; <float> [#uses=1]
        ret float %tmp.11
}


PowerPC Code:

        .machine ppc970


        .const
        .align  2
.CPIl1__Z2f1i_0:                                        ; float 0x4330000080000000
        .long   1501560836      ; float 4.5036e+15
        .text
        .align  2
        .globl  l1__Z2f1i
l1__Z2f1i:
.LBBl1__Z2f1i_0:        ; entry
        xoris r2, r3, 32768
        stw r2, -4(r1)
        lis r2, 17200
        stw r2, -8(r1)
        lfd f0, -8(r1)
        lis r2, ha16(.CPIl1__Z2f1i_0)
        lfs f1, lo16(.CPIl1__Z2f1i_0)(r2)
        fsub f1, f0, f1
        blr


        .const
        .align  2
.CPIl2__Z2f2j_0:                                        ; float 0x4330000000000000
        .long   1501560832      ; float 4.5036e+15
        .text
        .align  2
        .globl  l2__Z2f2j
l2__Z2f2j:
.LBBl2__Z2f2j_0:        ; entry
        stw r3, -4(r1)
        lis r2, 17200
        stw r2, -8(r1)
        lfd f0, -8(r1)
        lis r2, ha16(.CPIl2__Z2f2j_0)
        lfs f1, lo16(.CPIl2__Z2f2j_0)(r2)
        fsub f1, f0, f1
        blr


        .const
        .align  2
.CPIl3__Z2f3i_0:                                        ; float 0x4330000080000000
        .long   1501560836      ; float 4.5036e+15
        .text
        .align  2
        .globl  l3__Z2f3i
l3__Z2f3i:
.LBBl3__Z2f3i_0:        ; entry
        xoris r2, r3, 32768
        stw r2, -4(r1)
        lis r2, 17200
        stw r2, -8(r1)
        lfd f0, -8(r1)
        lis r2, ha16(.CPIl3__Z2f3i_0)
        lfs f1, lo16(.CPIl3__Z2f3i_0)(r2)
        fsub f0, f0, f1
        frsp f1, f0
        blr


        .const
        .align  2
.CPIl4__Z2f4j_0:                                        ; float 0x4330000000000000
        .long   1501560832      ; float 4.5036e+15
        .text
        .align  2
        .globl  l4__Z2f4j
l4__Z2f4j:
.LBBl4__Z2f4j_0:        ; entry
        stw r3, -4(r1)
        lis r2, 17200
        stw r2, -8(r1)
        lfd f0, -8(r1)
        lis r2, ha16(.CPIl4__Z2f4j_0)
        lfs f1, lo16(.CPIl4__Z2f4j_0)(r2)
        fsub f0, f0, f1
        frsp f1, f0
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22814 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 00:39:29 +00:00
Chris Lattner
37bfbb47de add a new TargetConstant node
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22813 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-17 00:34:06 +00:00
Chris Lattner
d5d0f9bd20 Eliminate the RegSDNode class, which 3 nodes (CopyFromReg/CopyToReg/ImplicitDef)
used to tack a register number onto the node.

Instead of doing this, make a new node, RegisterSDNode, which is a leaf
containing a register number.  These three operations just become normal
DAG nodes now, instead of requiring special handling.

Note that with this change, it is no longer correct to make illegal
CopyFromReg/CopyToReg nodes.  The legalizer will not touch them, and this
is bad, so don't do it. :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22806 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-16 21:55:35 +00:00
Nate Begeman
7cbd525ba8 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22805 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-16 19:49:35 +00:00
Chris Lattner
f3e133a35f Allow passing a dag into dump and getOperationName. If one is available
when printing a node, use it to render target operations with their
target instruction name instead of "<<unknown>>".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22804 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-16 18:33:07 +00:00
Chris Lattner
ad95d6ab20 Use a extant helper to do this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22802 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-16 18:31:23 +00:00
Chris Lattner
149c58ce0b Add some methods for dag->dag isel.
Split RemoveNodeFromCSEMaps out of DeleteNodesIfDead to do it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22801 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-16 18:17:10 +00:00
Nate Begeman
2d56e72f09 Fix last night's PPC32 regressions by
1. Not selecting the false value of a select_cc in the false arm, which
   isn't legal for nested selects.
2. Actually returning the node we created and Legalized in the FP_TO_UINT
   Expander.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22789 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-14 18:38:32 +00:00
Nate Begeman
d2558e3e4a Teach the legalizer how to legalize FP_TO_UINT.
Teach the legalizer to promote FP_TO_UINT to FP_TO_SINT if the wider
  FP_TO_UINT is also illegal.  This allows us on PPC to codegen
  unsigned short foo(float a) { return a; }

as:
_foo:
.LBB_foo_0:     ; entry
        fctiwz f0, f1
        stfd f0, -8(r1)
        lwz r2, -4(r1)
        rlwinm r3, r2, 0, 16, 31
        blr

instead of:
_foo:
.LBB_foo_0:     ; entry
        fctiwz f0, f1
        stfd f0, -8(r1)
        lwz r2, -4(r1)
        lis r3, ha16(.CPI_foo_0)
        lfs f0, lo16(.CPI_foo_0)(r3)
        fcmpu cr0, f1, f0
        blt .LBB_foo_2  ; entry
.LBB_foo_1:     ; entry
        fsubs f0, f1, f0
        fctiwz f0, f0
        stfd f0, -16(r1)
        lwz r2, -12(r1)
        xoris r2, r2, 32768
.LBB_foo_2:     ; entry
        rlwinm r3, r2, 0, 16, 31
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22785 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-14 01:20:53 +00:00
Nate Begeman
ff66368a5f Remove an unncessary argument to SimplifySelectCC and add an additional
assert when creating a select_cc node.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22780 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-13 06:14:17 +00:00
Nate Begeman
32c392a3a5 Fix the fabs regression on x86 by abstracting the select_cc optimization
out into SimplifySelectCC.  This allows both ISD::SELECT and ISD::SELECT_CC
to use the same set of simplifying folds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22779 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-13 06:00:21 +00:00
Chris Lattner
3e27b1f5c4 implement a couple of simple shift foldings.
e.g.  (X & 7) >> 3   -> 0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22774 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-12 23:54:58 +00:00
Nate Begeman
e1fae4a3ae Add a select_cc optimization for recognizing abs(int). This speeds up an
integer MPEG encoding loop by a factor of two.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22758 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-11 02:18:13 +00:00
Nate Begeman
e5d63829fd Some SELECT_CC cleanups:
1. move assertions for node creation to getNode()
2. legalize the values returned in ExpandOp immediately
3. Move select_cc optimizations from SELECT's getNode() to SELECT_CC's,
   allowing them to be cleaned up significantly.

This paves the way to pick up additional optimizations on SELECT_CC, such
as sum-of-absolute-differences.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22757 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-11 01:12:20 +00:00
Nate Begeman
9373a81e53 Add new node, SELECT_CC. This node is for targets that don't natively
implement SELECT.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22755 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-10 20:51:12 +00:00
Chris Lattner
7c6e452d44 Fix an oversight that may be causing PR617.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22753 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-10 17:37:53 +00:00
Chris Lattner
bd8625b062 Fix spelling, fix some broken canonicalizations by my last patch
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22734 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-09 23:09:05 +00:00