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Author SHA1 Message Date
Nate Begeman
8ca5693c51 Ack, typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22981 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-23 05:45:10 +00:00
Nate Begeman
a50d53e5ef Add an option to make SetCC illegal as a beta option 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22979 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-23 05:42:36 +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
Nate Begeman
354df0ae6d Remove some instructions we no longer generate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22976 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-23 01:16:46 +00:00
Chris Lattner
1f24df6324 Remove some regs that are not used. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22975 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-22 22:32:13 +00:00
Chris Lattner
9dc4d3cbac Nate noticed that 30% of the malloc/frees in llc come from calls to LowercaseString 
in the asmprinter.  This changes the .td files to use lower case register names,
avoiding the need to do this call.  This speeds up the asmprinter from 1.52s
to 1.06s on kc++ in a release build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22974 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-22 22:00:02 +00:00
Chris Lattner
0a00bece0d Fix a crash I introduced into the IA64 backend with my copyfromreg change. 
It used to crash on any function that took float arguments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22973 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-22 21:33:11 +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
47c0889419 Add a pass name for -time-passes output 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22970 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-22 18:28:09 +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
f7f2255505 Implement stores. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22963 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-22 01:27:59 +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
ddf3e7dfd7 Fix compilation of: 
float %test2(float* %P) {
        %Q = load float* %P
        %R = add float %Q, %Q
        ret float %R
}

By returning the right result.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22961 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-22 00:59:14 +00:00
Chris Lattner
b30ee6a41a Make sure expressions only have one use before emitting them into a place that is conditionally executed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22960 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-22 00:47:28 +00:00
Chris Lattner
9944b76cfe Implement most of load support. There is still a bug though. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22959 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 22:31:09 +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
1db1adbdee Don't print out the MBB label for the entry mbb 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22953 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 19:09:33 +00:00
Chris Lattner
f913d3f91c Simplify the logic for BRTWOWAY_CC handling. The isel code already 
simplifies BRTWOWAY into BR if one of the results is a fall-through.
Unless I'm missing something, there is no reason to duplicate this
in the target-specific code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22952 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 19:03:28 +00:00
Chris Lattner
2fbb4579d6 Implement selection for branches. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22951 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 18:50:37 +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
4dd4a2d278 If the false value for a select_cc is really simple (has no inputs), evaluate 
it in the block.  This codegens:

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

as:

_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

instead of:

_test:
        rlwinm r2, r3, 0, 31, 31
        li r2, 17
        li r4, 1
        cmpwi cr0, r3, 0
        bne .LBB_test_2 ;
.LBB_test_1:    ;
        or r2, r4, r4
.LBB_test_2:    ;
        or r3, r2, r2
        blr

... which is one fewer instruction.  The savings are more significant for
global address and constantfp nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22946 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 17:41:11 +00:00
Duraid Madina
7340dd5d2e reenable collapse of loadimm+AND -> dep.z (thanks guys) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22944 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-21 15:43:53 +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
Jim Laskey
ffb973df92 Repair an out by one error for IA64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22942 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-20 11:05:23 +00:00
Chris Lattner
4416f1a0a5 add support for global address, including PIC support. 
This REALLY should be lowered by the legalizer!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22941 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 22:38:53 +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
7e65997c43 Fix a typeo, no wonder all tokenfactor edges were the same! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22935 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 21:33:02 +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
Chris Lattner
ecbce617ca Split RegisterClass 'Methods' into MethodProtos and MethodBodies 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22929 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 19:13:20 +00:00
Chris Lattner
f0c5f67dbc put reg classes into namespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22927 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:53:43 +00:00
Chris Lattner
fabc8ffacb Put reg classes into namespaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22926 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:52:55 +00:00
Chris Lattner
03ba7b9f25 Put register classes into namespaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22925 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:51:57 +00:00
Chris Lattner
cbec3b00bd Put register classes in namespaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22924 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:50:46 +00:00
Chris Lattner
e7af178ccf Fix code that assumes the register info will be dumped into a target 
namespace instead of the reg class namespace.  Update getRegClassForType()
to use modified names due to tblgen change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22923 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:50:11 +00:00
Chris Lattner
28e728d75a put reg classes in namespaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22922 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:49:22 +00:00
Chris Lattner
1ff9540c17 Require that targets specify a namespace for their register classes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22921 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:48:48 +00:00
Chris Lattner
6096f0d4c6 The skeleton target has never had an isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22917 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:35:41 +00:00
Chris Lattner
8212203ab9 This code has always been dead on itanium 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22916 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:34:37 +00:00
Chris Lattner
5499742c06 This code has always been dead for alpha 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22915 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:33:26 +00:00
Chris Lattner
2505d6b727 The simple isel being gone makes this dead! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22914 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:32:03 +00:00
Chris Lattner
0b1e641b82 Now that the simple isels are dead, so is this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22913 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:30:39 +00:00
Chris Lattner
c19d5621ae Sparcv9 gets no operand info 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22909 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 16:56:56 +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
Duraid Madina
a91103430b a bugfix (up top) and a quick repair job: disable generation of dep.z 
(which died about a week ago) so we're back to load-(2^n-1)-then-AND
sequences. slow, but things should now be Almost Completely Working,
modulo those pesky alignment/ABI issues.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22904 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 13:25:50 +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
Nate Begeman
27d53ba6dd Fix a bug where we were passing the wrong number of arguments to an 
instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22901 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 03:42:28 +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
80132a4b48 mark variable arity instructions as such. Alpha wins the battle for 
cleanest backend in this metric :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22893 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:51:37 +00:00
Chris Lattner
efc58be8ca Mark some instructions as variable_ops, and PSEUDO_ALLOC as taking a GPR. 
I'm not convinced this is all of them,  but I can't do much testing, because
IA64 LLC crashes on big programs :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22892 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:47:42 +00:00
Chris Lattner
9d9dc816d0 add a few missing cases 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22891 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:41:29 +00:00
Chris Lattner
b822abade7 Give ADJCALLSTACKDOWN/UP the correct operands. 
Give a whole bunch of other stuff variable operands, particularly FP.  The
FP stackifier is playing fast and loose with operands here, so we have to
mark them all as variable.  This will have to be fixed before we can dag->dag
the X86 backend.  The solution is for the pre-stackifier and post-stackifier
instructions to all be disjoint.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22890 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:38:22 +00:00
Nate Begeman
02b88a4586 ISD::OR, and it's accompanying SelectBitfieldInsert 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22889 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:38:14 +00:00
Chris Lattner
679c408768 The variable SAR's only take one operand too 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22888 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:31:37 +00:00
Chris Lattner
fd444b2a69 Stop adding bogus operands to variable shifts on X86. These instructions 
only take one operand.  The other comes implicitly in through CL.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22887 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:16:17 +00:00
Nate Begeman
73bfa71524 Remove the X86 and PowerPC Simple instruction selectors; their time has 
passed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22886 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 23:53:15 +00:00
Nate Begeman
c15ed447f4 Add shifts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22884 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 23:38:00 +00:00
Chris Lattner
45fcb8f410 Fix operand numbers by marking variable arity nodes as such and by fixing 
the operand lists of a few other nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22883 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 23:25:33 +00:00
Chris Lattner
3f852b45fc MFLR doesn't take an operand, the LR register is implicit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22882 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 23:24:50 +00:00
Chris Lattner
329cdc3801 Add a new flag 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22881 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 23:17:07 +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
0bc04231c0 Move this to the emitter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22877 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 20:08:53 +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
Jim Laskey
5b5f0b7fd5 More optimal solution for loading constants. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22870 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 18:58:23 +00:00
Chris Lattner
d607c12e8e After selecting the instructions for a basic block, emit the instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22869 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 18:46:06 +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
f5fac3b4a6 remove some unused stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22866 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 18:34:00 +00:00
Nate Begeman
58dfb08319 Fix int foo() { return 65535; } by using the top 16 bits of the constant 
as the argument to LIS rather than the result of HA16(constant).

The DAG->DAG ISel was already doing the right thing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22865 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 18:14:49 +00:00
Nate Begeman
a694047813 Improve ISD::Constant codegen. 
Now for int foo() { return -1; } we generate:
_foo:
        li r3, -1
        blr

instead of
_foo:
        lis r2, -1
        ori r3, r2, 65535
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22864 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 18:01:39 +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
Chris Lattner
0c09a411e0 replace switch stmt with an assert, generate li 0 instead of lis 0 for 0, 
to make the code follow people's expectations better.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22861 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 17:16:52 +00:00
Jim Laskey
3285aadce9 Handle loading of 0x????0000 constants with a single instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22858 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 15:52:30 +00:00
Nate Begeman
cffc32b6e2 Add support for ISD::AND, and its various optimized forms. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22857 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 07:30:46 +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
Nate Begeman
131a880520 Maintain consistency in negating things 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22855 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 05:44:50 +00:00
Nate Begeman
0f3257a330 Implement XOR, remove a broken sign_extend_inreg case 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22854 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 05:00:13 +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
Nate Begeman
305a1c75cf Add a bunch more simple nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22851 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 03:04:18 +00:00
Nate Begeman
6a7d61179c Add a couple more nodes that are easy to handle 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22850 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 00:53:47 +00:00
Nate Begeman
b5a0668d43 Be fruitful and multiply! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22849 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 00:21:41 +00:00
Jim Laskey
b454cfd453 Better version of isIntImmediate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22848 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 00:15:15 +00:00
Nate Begeman
26653500bb Teach the DAG->DAG ISel about FNEG, and how it can be used to invert 
several of the PowerPC opcodes that come in both negated and non-negated
forms.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22845 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 23:46:35 +00:00
Chris Lattner
8385e51e21 Fix Transforms/LoopStrengthReduce/2005-08-17-OutOfLoopVariant.ll, a crash 
on 177.mesa


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22843 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 21:22:41 +00:00
Jim Laskey
58b968be85 Move the code dependency for MathExtras.h from SelectionDAGNodes.h. 
Added some class dividers in SelectionDAG.cpp.


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 2005-08-17 20:08:02 +00:00
Jim Laskey
3a1eff732b Move code dependency for MathExtras.h out of Constants.h. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22840 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 20:06:22 +00:00
Jim Laskey
b8df7c2213 Promote dependency for MathExtras.h out of Constants.h. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22839 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 20:04:34 +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
8482dd894d add a beta option for turning on dag->dag isel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22837 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 19:33:30 +00:00
Chris Lattner
a5a91b1026 initial hack at a dag->dag instruction selector. This is obviously woefully 
incomplete, but it is a start.  It handles basic argument/retval stuff, immediates,
add and sub.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22836 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-17 19:33:03 +00:00