Chris Lattner
7efca0c312
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
faa96209d8
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
3e0bfc0cc1
Revampt ReplaceAllUsesWith to be more efficient and easier to use.
...
llvm-svn: 23087
2005-08-26 18:36:28 +00:00
Chris Lattner
a31708e6b3
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
929c00e9e9
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
6d22117d76
the 5th operand is the 4th number
...
llvm-svn: 23074
2005-08-26 00:43:46 +00:00
Chris Lattner
f25ec1b7b9
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
7e68d39877
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
2c3fbbab05
Fix a nasty bug from a previous patch of mine
...
llvm-svn: 23069
2005-08-26 00:13:12 +00:00
Nate Begeman
54f44ad750
New fold for SELECT_CC
...
llvm-svn: 23058
2005-08-25 20:04:38 +00:00
Chris Lattner
18572f3c67
Don't auto-cse nodes that return flags
...
llvm-svn: 23055
2005-08-25 19:12:10 +00:00
Chris Lattner
cb3910fa74
add printer support for flag operands
...
llvm-svn: 23054
2005-08-25 17:59:23 +00:00
Chris Lattner
7c7a447220
simplify the code a bit using isOperationLegal
...
llvm-svn: 23053
2005-08-25 17:54:58 +00:00
Chris Lattner
7598a14e0c
Add support for flag operands
...
llvm-svn: 23050
2005-08-25 17:48:54 +00:00
Chris Lattner
0168c8df11
ADd support for TargetConstantPool nodes
...
llvm-svn: 23041
2005-08-25 05:03:06 +00:00
Chris Lattner
813f6ddaf8
add a new TargetFrameIndex node
...
llvm-svn: 23035
2005-08-25 00:43:01 +00:00
Chris Lattner
22c6c99e5d
add a method
...
llvm-svn: 23027
2005-08-24 23:00:29 +00:00
Chris Lattner
786ec10dfb
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
92b560cfee
Add support for external symbols, and support for variable arity instructions
...
llvm-svn: 23022
2005-08-24 22:02:41 +00:00
Chris Lattner
55fb48f5ee
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
6d4cd33447
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
014e001f23
Start using isOperationLegal and isTypeLegal to simplify the code
...
llvm-svn: 23012
2005-08-24 16:35:28 +00:00
Nate Begeman
2fc750ca45
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
64f7f0beac
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
d4fcf86262
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
Chris Lattner
e7c3b71a28
Implement LiveVariables.h change
...
llvm-svn: 22994
2005-08-24 00:09:33 +00:00
Chris Lattner
7e3441972b
adjust to new live variables interface
...
llvm-svn: 22992
2005-08-23 23:42:17 +00:00
Chris Lattner
53b91b741f
Simplify this code by using higher-level LiveVariables methods
...
llvm-svn: 22989
2005-08-23 22:51:41 +00:00
Chris Lattner
610eeca969
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.
llvm-svn: 22986
2005-08-23 22:27:31 +00:00
Nate Begeman
f1581c11e9
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
885680bafb
Teach Legalize how to turn setcc into select_cc
...
llvm-svn: 22977
2005-08-23 04:29:48 +00:00
Chris Lattner
2c5f36d938
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.
llvm-svn: 22972
2005-08-22 20:59:30 +00:00
Chris Lattner
9b0058b424
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.
llvm-svn: 22971
2005-08-22 20:20:42 +00:00
Chris Lattner
d73a5042d9
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
a9710ba54f
Speed up this loop a bit, based on some observations that Nate made, and
...
add some comments. This loop really needs to be reevaluated!
llvm-svn: 22966
2005-08-22 16:55:22 +00:00
Chris Lattner
7ce81741ff
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
8927bf468d
add anew method
...
llvm-svn: 22957
2005-08-21 22:30:30 +00:00
Chris Lattner
7a04eff613
Add support for frame index nodes
...
llvm-svn: 22956
2005-08-21 19:56:04 +00:00
Chris Lattner
cbbd212622
add a method
...
llvm-svn: 22955
2005-08-21 19:48:59 +00:00
Chris Lattner
481b47fc75
add a method
...
llvm-svn: 22949
2005-08-21 18:49:33 +00:00
Chris Lattner
3f6df51c19
Add support for basic blocks, fix a bug in result # computation
...
llvm-svn: 22948
2005-08-21 18:49:29 +00:00
Chris Lattner
9bb0d10479
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
7c3e52ef92
fix bogus warning
...
llvm-svn: 22943
2005-08-20 18:07:27 +00:00
Chris Lattner
5b7488224d
Add support for global address nodes
...
llvm-svn: 22940
2005-08-19 22:38:24 +00:00
Chris Lattner
5210fd0e51
Add support for TargetGlobalAddress nodes
...
llvm-svn: 22938
2005-08-19 22:31:04 +00:00
Chris Lattner
bedf8e757a
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
b36807b0d0
Fix a bug in previous commit
...
llvm-svn: 22936
2005-08-19 21:34:13 +00:00
Chris Lattner
ac699c4db9
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
011a721d08
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
9af3aaf541
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
12674110d5
Fix VC++ constant truncation warning.
...
llvm-svn: 22907
2005-08-19 16:19:21 +00:00
Jeff Cohen
f99748bc0f
Fix VC++ precedence warning.
...
llvm-svn: 22902
2005-08-19 04:39:48 +00:00
Chris Lattner
1207209677
Fix computation of # operands, add a temporary hack for CopyToReg
...
llvm-svn: 22896
2005-08-19 01:01:34 +00:00
Chris Lattner
7b9f02525e
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
62bc771af7
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
ebb48e5877
new file, obviously just a stub
...
llvm-svn: 22868
2005-08-18 18:45:24 +00:00
Chris Lattner
5cbeaed711
Enable critical edge splitting by default
...
llvm-svn: 22863
2005-08-18 17:35:14 +00:00
Nate Begeman
474ec3c02d
Add support for target DAG nodes that take 4 operands, such as PowerPC's
...
rlwinm.
llvm-svn: 22856
2005-08-18 07:30:15 +00:00
Chris Lattner
d6b9b36616
Fix printing of VTSDNodes
...
llvm-svn: 22853
2005-08-18 03:31:02 +00:00
Jim Laskey
d761e8859d
Move the code dependency for MathExtras.h from SelectionDAGNodes.h.
...
Added some class dividers in SelectionDAG.cpp.
llvm-svn: 22841
2005-08-17 20:08:02 +00:00
Jim Laskey
61e3d7bca5
Culling out use of unions for converting FP to bits and vice versa.
...
llvm-svn: 22838
2005-08-17 19:34:49 +00:00
Chris Lattner
a11bdf3abe
Fix a bug in RemoveDeadNodes where it would crash when its "optional"
...
argument is not specified.
Implement ReplaceAllUsesWith.
llvm-svn: 22834
2005-08-17 19:00:20 +00:00
Jim Laskey
7cdadb13d5
Switched to using BitsToDouble for int_to_float to avoid aliasing problem.
...
llvm-svn: 22831
2005-08-17 17:42:52 +00:00
Jim Laskey
2370cb4e85
Change hex float constants for the sake of VC++.
...
llvm-svn: 22828
2005-08-17 09:44:59 +00:00
Chris Lattner
dbfcba7565
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.
llvm-svn: 22825
2005-08-17 06:37:43 +00:00
Chris Lattner
a103a2e9c6
Fix a regression on X86, where FP values can be promoted too.
...
llvm-svn: 22822
2005-08-17 06:06:25 +00:00
Jim Laskey
59b9ee0529
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
llvm-svn: 22814
2005-08-17 00:39:29 +00:00
Chris Lattner
bd8cbd4951
add a new TargetConstant node
...
llvm-svn: 22813
2005-08-17 00:34:06 +00:00
Chris Lattner
3b7e157005
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. :)
llvm-svn: 22806
2005-08-16 21:55:35 +00:00
Nate Begeman
f6b6378f23
Implement BR_CC and BRTWOWAY_CC. This allows the removal of a rather nasty
...
fixme from the PowerPC backend. Emit slightly better code for legalizing
select_cc.
llvm-svn: 22805
2005-08-16 19:49:35 +00:00
Chris Lattner
65b9983515
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>>".
llvm-svn: 22804
2005-08-16 18:33:07 +00:00
Chris Lattner
1b07a165e0
Use a extant helper to do this.
...
llvm-svn: 22802
2005-08-16 18:31:23 +00:00
Chris Lattner
73348d1e89
Add some methods for dag->dag isel.
...
Split RemoveNodeFromCSEMaps out of DeleteNodesIfDead to do it.
llvm-svn: 22801
2005-08-16 18:17:10 +00:00
Nate Begeman
54423e60c6
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.
llvm-svn: 22789
2005-08-14 18:38:32 +00:00
Nate Begeman
9be6a214ff
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
llvm-svn: 22785
2005-08-14 01:20:53 +00:00
Nate Begeman
021a5b3fe1
Remove an unncessary argument to SimplifySelectCC and add an additional
...
assert when creating a select_cc node.
llvm-svn: 22780
2005-08-13 06:14:17 +00:00
Nate Begeman
4e8f777256
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.
llvm-svn: 22779
2005-08-13 06:00:21 +00:00
Chris Lattner
e06d2c3760
implement a couple of simple shift foldings.
...
e.g. (X & 7) >> 3 -> 0
llvm-svn: 22774
2005-08-12 23:54:58 +00:00
Nate Begeman
09c56e0432
Add a select_cc optimization for recognizing abs(int). This speeds up an
...
integer MPEG encoding loop by a factor of two.
llvm-svn: 22758
2005-08-11 02:18:13 +00:00
Nate Begeman
206e850add
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.
llvm-svn: 22757
2005-08-11 01:12:20 +00:00
Nate Begeman
eddc9d4856
Add new node, SELECT_CC. This node is for targets that don't natively
...
implement SELECT.
llvm-svn: 22755
2005-08-10 20:51:12 +00:00
Chris Lattner
51cf9fd316
Fix an oversight that may be causing PR617.
...
llvm-svn: 22753
2005-08-10 17:37:53 +00:00
Chris Lattner
3179a74493
Fix spelling, fix some broken canonicalizations by my last patch
...
llvm-svn: 22734
2005-08-09 23:09:05 +00:00
Chris Lattner
3290ca9983
add cc nodes to the AllNodes list so they show up in Graphviz output
...
llvm-svn: 22731
2005-08-09 20:40:02 +00:00
Chris Lattner
0fa4402b59
Eliminate the SetCCSDNode in favor of a CondCodeSDNode class. This pulls the
...
CC out of the SetCC operation, making SETCC a standard ternary operation and
CC's a standard DAG leaf. This will make it possible for other node to use
CC's as operands in the future...
llvm-svn: 22728
2005-08-09 20:20:18 +00:00
Chris Lattner
e7f14fb39d
Handle 64-bit constant exprs on 64-bit targets.
...
llvm-svn: 22696
2005-08-08 04:26:32 +00:00
Chris Lattner
fdb467b18d
add a small simplification that can be exposed after promotion/expansion
...
llvm-svn: 22691
2005-08-07 05:00:44 +00:00
Chris Lattner
d3a8084e5b
Change FindEarliestCallSeqEnd (used by libcall insertion) to use a set to
...
avoid revisiting nodes more than once. This eliminates a source of
potentially exponential behavior. For a small function in 191.fma3d
(hexah_stress_divergence_), this speeds up isel from taking > 20mins to
taking 0.07s.
llvm-svn: 22680
2005-08-05 18:10:27 +00:00
Chris Lattner
c7a67abac2
Fix a use-of-dangling-pointer bug, from the introduction of SrcValue's.
...
llvm-svn: 22679
2005-08-05 16:55:31 +00:00
Chris Lattner
644edfb51e
Fix a latent bug in the libcall inserter that was exposed by Nate's patch
...
yesterday. This fixes whetstone and a bunch of programs in the External tests.
llvm-svn: 22678
2005-08-05 16:23:57 +00:00
Nate Begeman
348caa49b3
Fix a fixme in LegalizeDAG
...
llvm-svn: 22661
2005-08-04 21:43:28 +00:00
Misha Brukman
8b8272b648
* Unbreak release build
...
* Add comments to #endif pragmas for readability
llvm-svn: 22647
2005-08-04 14:22:41 +00:00
Chris Lattner
d124203207
Fix PR611, codegen'ing SREM of FP operands to fmod or fmodf instead of
...
the sequence used for integer ops
llvm-svn: 22629
2005-08-03 20:31:37 +00:00
Chris Lattner
cc8ae687e1
Update to use the new MathExtras.h support for log2 computation.
...
Patch contributed by Jim Laskey!
llvm-svn: 22594
2005-08-02 19:26:06 +00:00
Chris Lattner
83f0262a2c
Fix casts from long to sbyte on ppc
...
llvm-svn: 22570
2005-08-01 18:16:37 +00:00
Jeff Cohen
019104459d
Keep tabs and trailing spaces out.
...
llvm-svn: 22565
2005-07-30 18:33:25 +00:00
Chris Lattner
d742a80e9e
fix float->long conversions on x86
...
llvm-svn: 22563
2005-07-30 01:40:57 +00:00
Chris Lattner
e0b705ba00
Allow targets to have custom expanders for FP_TO_*INT conversions where
...
both the src and dest values are legal
llvm-svn: 22555
2005-07-30 00:04:12 +00:00
Chris Lattner
8d48aef4e3
Allow targets to define custom expanders for FP_TO_*INT
...
llvm-svn: 22548
2005-07-29 00:33:32 +00:00
Chris Lattner
f355c0f6ea
allow a target to request that unknown FP_TO_*INT conversion be promoted to
...
a larger integer destination.
llvm-svn: 22547
2005-07-29 00:11:56 +00:00