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1604 Commits

Author SHA1 Message Date
Chris Lattner
5ee85e89b6 fix PHI node emission for basic blocks that have select_cc's in them on ppc32 
llvm-svn: 23113
 2005-08-27 00:58:02 +00:00
Chris Lattner
56ca46ee04 Nate noticed that Andrew never did this. This fixes PR600 
llvm-svn: 23110
 2005-08-26 22:50:40 +00:00
Chris Lattner
e7a2998064 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

llvm-svn: 23109
 2005-08-26 22:49:59 +00:00
Chris Lattner
4a5ebe94ba Checking types here is not safe, because multiple types can map to the same 
register class.

llvm-svn: 23103
 2005-08-26 21:39:15 +00:00
Chris Lattner
13d7c252e5 Call the InsertAtEndOfBasicBlock hook if the usesCustomDAGSchedInserter 
flag is set on an instruction.

llvm-svn: 23098
 2005-08-26 20:54:47 +00:00
Chris Lattner
373f048a79 Revampt ReplaceAllUsesWith to be more efficient and easier to use. 
llvm-svn: 23087
 2005-08-26 18:36:28 +00:00
Chris Lattner
c30405e0ee 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.

llvm-svn: 23081
 2005-08-26 17:15:30 +00:00
Chris Lattner
2091a36631 Fix a huge annoyance: SelectNodeTo took types before the opcode unlike 
every other SD API.  Fix it to take the opcode before the types.

llvm-svn: 23079
 2005-08-26 16:36:26 +00:00
Chris Lattner
c6d481db7a the 5th operand is the 4th number 
llvm-svn: 23074
 2005-08-26 00:43:46 +00:00
Chris Lattner
5f573416cd Add support for targets that want to custom expand select_cc in some cases. 
llvm-svn: 23071
 2005-08-26 00:23:59 +00:00
Chris Lattner
dff50cadaa Allow LowerOperation to return a null SDOperand in case it wants to lower 
some things given to it, but not all.

llvm-svn: 23070
 2005-08-26 00:14:16 +00:00
Chris Lattner
1cb550c603 Fix a nasty bug from a previous patch of mine 
llvm-svn: 23069
 2005-08-26 00:13:12 +00:00
Nate Begeman
33840c3268 New fold for SELECT_CC 
llvm-svn: 23058
 2005-08-25 20:04:38 +00:00
Chris Lattner
f9c19157df Don't auto-cse nodes that return flags 
llvm-svn: 23055
 2005-08-25 19:12:10 +00:00
Chris Lattner
9d28a56d55 simplify the code a bit using isOperationLegal 
llvm-svn: 23053
 2005-08-25 17:54:58 +00:00
Chris Lattner
8a93f64efa Add support for flag operands 
llvm-svn: 23050
 2005-08-25 17:48:54 +00:00
Chris Lattner
407c6415b4 ADd support for TargetConstantPool nodes 
llvm-svn: 23041
 2005-08-25 05:03:06 +00:00
Chris Lattner
bbe0e7df2c add a new TargetFrameIndex node 
llvm-svn: 23035
 2005-08-25 00:43:01 +00:00
Chris Lattner
45e1ce4e28 add a method 
llvm-svn: 23027
 2005-08-24 23:00:29 +00:00
Chris Lattner
d7ee4d8671 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.

llvm-svn: 23025
 2005-08-24 22:44:39 +00:00
Chris Lattner
ad9565dfbe Add support for external symbols, and support for variable arity instructions 
llvm-svn: 23022
 2005-08-24 22:02:41 +00:00
Chris Lattner
bb8cc0acb2 Fix pasto that prevented VT ndoes from showing up in -view-isel-dags correctly 
llvm-svn: 23021
 2005-08-24 18:30:00 +00:00
Chris Lattner
86b1658d58 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.

llvm-svn: 23013
 2005-08-24 16:46:55 +00:00
Chris Lattner
f12eb4d676 Start using isOperationLegal and isTypeLegal to simplify the code 
llvm-svn: 23012
 2005-08-24 16:35:28 +00:00
Nate Begeman
45bbbb3f11 Teach SelectionDAG how to simplify a few more setcc-equivalent select_cc 
nodes so that backends don't have to.

llvm-svn: 22999
 2005-08-24 04:57:57 +00:00
Chris Lattner
99282c7b92 Make -view-isel-dags show the dag before instruction selecting, in case 
the target isel crashes due to unimplemented features like calls :)

llvm-svn: 22997
 2005-08-24 00:34:29 +00:00
Nate Begeman
72eab5dd5c Fix optimization of select_cc seteq X, 0, 1, 0 -> srl (ctlz X), log2 X size 
llvm-svn: 22995
 2005-08-24 00:21:28 +00:00
Nate Begeman
bf8c3939d7 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.

llvm-svn: 22978
 2005-08-23 05:41:12 +00:00
Nate Begeman
987121a61a Teach Legalize how to turn setcc into select_cc 
llvm-svn: 22977
 2005-08-23 04:29:48 +00:00
Chris Lattner
7f9e078d11 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

llvm-svn: 22969
 2005-08-22 17:28:31 +00:00
Chris Lattner
92626b9bc5 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

llvm-svn: 22962
 2005-08-22 01:04:32 +00:00
Chris Lattner
466fecee19 add anew method 
llvm-svn: 22957
 2005-08-21 22:30:30 +00:00
Chris Lattner
4866356907 Add support for frame index nodes 
llvm-svn: 22956
 2005-08-21 19:56:04 +00:00
Chris Lattner
0548f50501 add a method 
llvm-svn: 22955
 2005-08-21 19:48:59 +00:00
Chris Lattner
707b39fb8c add a method 
llvm-svn: 22949
 2005-08-21 18:49:33 +00:00
Chris Lattner
154b2bc59b Add support for basic blocks, fix a bug in result # computation 
llvm-svn: 22948
 2005-08-21 18:49:29 +00:00
Chris Lattner
539c3fa863 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
}

llvm-svn: 22947
 2005-08-21 18:03:09 +00:00
Chris Lattner
4b08ba26d8 fix bogus warning 
llvm-svn: 22943
 2005-08-20 18:07:27 +00:00
Chris Lattner
319e65696d Add support for global address nodes 
llvm-svn: 22940
 2005-08-19 22:38:24 +00:00
Chris Lattner
1be7eddecf Add support for TargetGlobalAddress nodes 
llvm-svn: 22938
 2005-08-19 22:31:04 +00:00
Chris Lattner
6d7f814b01 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!

llvm-svn: 22937
 2005-08-19 21:43:53 +00:00
Chris Lattner
0875d1ab89 Fix a bug in previous commit 
llvm-svn: 22936
 2005-08-19 21:34:13 +00:00
Chris Lattner
4990335eb8 Print physreg register nodes with target names (e.g. F1) instead of numbers 
llvm-svn: 22934
 2005-08-19 21:21:16 +00:00
Chris Lattner
78b200eb74 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 :)

llvm-svn: 22933
 2005-08-19 20:50:53 +00:00
Chris Lattner
cc3035e989 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.

llvm-svn: 22932
 2005-08-19 20:45:43 +00:00
Jeff Cohen
d1f22b1282 Fix VC++ precedence warning. 
llvm-svn: 22902
 2005-08-19 04:39:48 +00:00
Chris Lattner
d18beab94c Fix computation of # operands, add a temporary hack for CopyToReg 
llvm-svn: 22896
 2005-08-19 01:01:34 +00:00
Chris Lattner
0c8c2c102d add a new -view-sched-dags option to view dags as they are sent to the scheduler. 
llvm-svn: 22878
 2005-08-18 20:11:49 +00:00
Chris Lattner
d342de9aaa 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). :)

llvm-svn: 22876
 2005-08-18 20:07:59 +00:00
Chris Lattner
1b4727de7d new file, obviously just a stub 
llvm-svn: 22868
 2005-08-18 18:45:24 +00:00