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1536 Commits

Author SHA1 Message Date
Chris Lattner
4134789c8f CopyFromReg produces two values. Make sure that we remember that both are 
legalized, and actually return the correct result when we legalize the chain first.

llvm-svn: 19866
 2005-01-28 06:27:38 +00:00
Chris Lattner
849899e193 Silence optimized warnings. 
llvm-svn: 19797
 2005-01-23 23:19:44 +00:00
Chris Lattner
65fc8007cd Simplify/speedup the PEI by not having to scan for uses of the callee saved 
registers.  This information is computed directly by the register allocator
now.

llvm-svn: 19795
 2005-01-23 23:13:12 +00:00
Chris Lattner
556679b89d Update physregsused info. 
llvm-svn: 19793
 2005-01-23 22:55:45 +00:00
Chris Lattner
cc22be2981 Update this pass to set PhysRegsUsed info in MachineFunction. 
llvm-svn: 19792
 2005-01-23 22:51:56 +00:00
Chris Lattner
964297fc32 Update these register allocators to set the PhysRegUsed info in MachineFunction. 
llvm-svn: 19791
 2005-01-23 22:45:13 +00:00
Chris Lattner
6a6d5cf9eb Add support for the PhysRegsUsed array. 
llvm-svn: 19789
 2005-01-23 22:13:58 +00:00
Chris Lattner
c187b917f2 Speed this up a bit by making ModifiedRegs a vector<char> not vector<bool> 
llvm-svn: 19787
 2005-01-23 21:45:01 +00:00
Chris Lattner
b3a5fc3ec0 Adjust to changes in SelectionDAG interfaces 
The first half of correct chain insertion for libcalls. This is not enough
to fix Fhourstones yet though.

llvm-svn: 19781
 2005-01-23 04:42:50 +00:00
Chris Lattner
3165569ba9 Remove the 3 HACK HACK HACKs I put in before, fixing them properly with 
the new TLI that is available.

Implement support for handling out of range shifts.  This allows us to
compile this code (a 64-bit rotate):

unsigned long long f3(unsigned long long x) {
  return (x << 32) | (x >> (64-32));
}

into this:

f3:
        mov %EDX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%ESP + 8]
        ret

GCC produces this:

$ gcc t.c -masm=intel -O3 -S -o - -fomit-frame-pointer
..
f3:
        push    %ebx
        mov     %ebx, DWORD PTR [%esp+12]
        mov     %ecx, DWORD PTR [%esp+8]
        mov     %eax, %ebx
        mov     %edx, %ecx
        pop     %ebx
        ret

The Simple ISEL produces (eww gross):

f3:
        sub %ESP, 4
        mov DWORD PTR [%ESP], %ESI
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %ECX, DWORD PTR [%ESP + 12]
        mov %EAX, 0
        mov %ESI, 0
        or %EAX, %ECX
        or %EDX, %ESI
        mov %ESI, DWORD PTR [%ESP]
        add %ESP, 4
        ret

llvm-svn: 19780
 2005-01-23 04:39:44 +00:00
Chris Lattner
4c997d281c Adjust to changes in SelectionDAG interface. 
llvm-svn: 19779
 2005-01-23 04:36:26 +00:00
Chris Lattner
63ec3c402b Get this to work for 64-bit systems. 
llvm-svn: 19763
 2005-01-22 23:04:37 +00:00
Chris Lattner
29d6389d78 Implicitly defined registers can clobber callee saved registers too! 
This fixes the return-address-not-being-saved problem in the Alpha backend.

llvm-svn: 19741
 2005-01-22 00:49:16 +00:00
Chris Lattner
97f35a7a07 More bugfixes for IA64 shifts. 
llvm-svn: 19739
 2005-01-22 00:33:03 +00:00
Chris Lattner
67deea9d05 Fix problems with non-x86 targets. 
llvm-svn: 19738
 2005-01-22 00:31:52 +00:00
Chris Lattner
42e239ed58 Add a nasty hack to fix Alpha/IA64 multiplies by a power of two. 
llvm-svn: 19737
 2005-01-22 00:20:42 +00:00
Chris Lattner
e724100870 Remove unneeded line. 
llvm-svn: 19736
 2005-01-21 23:43:12 +00:00
Chris Lattner
a974e215a5 test commit 
llvm-svn: 19735
 2005-01-21 23:38:56 +00:00
Chris Lattner
392ddf430b Unary token factor nodes are unneeded. 
llvm-svn: 19727
 2005-01-21 18:01:22 +00:00
Chris Lattner
07c35617d5 Refactor libcall code a bit. Initial implementation of expanding int -> FP 
operations for 64-bit integers.

llvm-svn: 19724
 2005-01-21 06:05:23 +00:00
Chris Lattner
6258ec2e1d Simplify the shift-expansion code. 
llvm-svn: 19721
 2005-01-20 20:29:23 +00:00
Chris Lattner
c95c7c90c9 Expand add/sub into ADD_PARTS/SUB_PARTS instead of a non-existant libcall. 
llvm-svn: 19715
 2005-01-20 18:52:28 +00:00
Chris Lattner
4086a7a803 implement add_parts/sub_parts. 
llvm-svn: 19714
 2005-01-20 18:50:55 +00:00
Chris Lattner
e7ce5d0e4c Add missing entry. 
llvm-svn: 19712
 2005-01-20 17:32:28 +00:00
Chris Lattner
e5212a16a2 Support targets that do not use i8 shift amounts. 
llvm-svn: 19707
 2005-01-19 22:31:21 +00:00
Chris Lattner
0e7435bc5b Add an assertion that would have made more sense to duraid 
llvm-svn: 19704
 2005-01-19 21:32:07 +00:00
Chris Lattner
c662697319 Add support for targets that pass args in registers to calls. 
llvm-svn: 19703
 2005-01-19 20:24:35 +00:00
Chris Lattner
277ac2be70 Fold single use token factor nodes into other token factor nodes. 
llvm-svn: 19701
 2005-01-19 19:10:54 +00:00
Chris Lattner
85e0771f79 Realize the individual pieces of an expanded copytoreg/store/load are 
independent of each other.

llvm-svn: 19700
 2005-01-19 18:02:17 +00:00
Chris Lattner
027c97e93e Know some identities about tokenfactor nodes. 
llvm-svn: 19699
 2005-01-19 18:01:40 +00:00
Chris Lattner
7114e8a527 Know some simple identities. This improves codegen for (1LL << N). 
llvm-svn: 19698
 2005-01-19 17:29:49 +00:00
Chris Lattner
e97ed92617 Just in case, handle something that is both a use and a def. 
llvm-svn: 19696
 2005-01-19 17:11:51 +00:00
Chris Lattner
2cb11bd2b9 When an instruction moves, make sure to update the VarInfo::Kills list as 
well as all of teh other stuff in livevar. This fixes the compiler crash
on fourinarow last night.

llvm-svn: 19695
 2005-01-19 17:09:15 +00:00
Chris Lattner
408325ffdf Use the TargetInstrInfo::commuteInstruction method to commute instructions 
instead of doing it manually.

llvm-svn: 19685
 2005-01-19 07:08:42 +00:00
Chris Lattner
743a36c818 Implement a way of expanding shifts. This applies to targets that offer 
select operations or to shifts that are by a constant.  This automatically
implements (with no special code) all of the special cases for shift by 32,
shift by < 32 and shift by > 32.

llvm-svn: 19679
 2005-01-19 04:19:40 +00:00
Chris Lattner
0df1935505 Zero is cheaper than sign extend. 
llvm-svn: 19675
 2005-01-18 21:57:59 +00:00
Chris Lattner
4360871e16 Fix some fixmes (promoting bools for select and brcond), fix promotion 
of zero and sign extends.

llvm-svn: 19671
 2005-01-18 19:27:06 +00:00
Chris Lattner
eea485de1f Keep track of the retval type as well. 
llvm-svn: 19670
 2005-01-18 19:26:36 +00:00
Chris Lattner
ff086f3016 Teach legalize to promote copy(from|to)reg, instead of making the isel pass 
do it.  This results in better code on X86 for floats (because if strict
precision is not required, we can elide some more expensive double -> float
conversions like the old isel did), and allows other targets to emit
CopyFromRegs that are not legal for arguments.

llvm-svn: 19668
 2005-01-18 17:54:55 +00:00
Chris Lattner
891aa537f7 Teach legalize to promote SetCC results. 
llvm-svn: 19657
 2005-01-18 02:59:52 +00:00
Chris Lattner
95307053ec Allow setcc operations to have nonbool types. 
llvm-svn: 19656
 2005-01-18 02:52:03 +00:00
Chris Lattner
906541da95 Fix the completely broken FP constant folds for setcc's. 
llvm-svn: 19651
 2005-01-18 02:11:55 +00:00
Chris Lattner
c0aca0d13c Non-volatile loads can be freely reordered against each other. This fixes 
X86/reg-pressure.ll again, and allows us to do nice things in other cases.
For example, we now codegen this sort of thing:

int %loadload(int *%X, int* %Y) {
  %Z = load int* %Y
  %Y = load int* %X      ;; load between %Z and store
  %Q = add int %Z, 1
  store int %Q, int* %Y
  ret int %Y
}

Into this:

loadload:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%EAX]
        mov %ECX, DWORD PTR [%ESP + 8]
        inc DWORD PTR [%ECX]
        ret

where we weren't able to form the 'inc [mem]' before.  This also lets the
instruction selector emit loads in any order it wants to, which can be good
for register pressure as well.

llvm-svn: 19644
 2005-01-17 22:19:26 +00:00
Chris Lattner
49291c4d96 Don't call SelectionDAG.getRoot() directly, go through a forwarding method. 
llvm-svn: 19642
 2005-01-17 19:43:36 +00:00
Chris Lattner
88bbcfc893 Implement a target independent optimization to codegen arguments only into 
the basic block that uses them if possible.  This is a big win on X86, as it
lets us fold the argument loads into instructions and reduce register pressure
(by not loading all of the arguments in the entry block).

For this (contrived to show the optimization) testcase:

int %argtest(int %A, int %B) {
        %X = sub int 12345, %A
        br label %L
L:
        %Y = add int %X, %B
        ret int %Y
}

we used to produce:

argtest:
        mov %ECX, DWORD PTR [%ESP + 4]
        mov %EAX, 12345
        sub %EAX, %ECX
        mov %EDX, DWORD PTR [%ESP + 8]
.LBBargtest_1:  # L
        add %EAX, %EDX
        ret


now we produce:

argtest:
        mov %EAX, 12345
        sub %EAX, DWORD PTR [%ESP + 4]
.LBBargtest_1:  # L
        add %EAX, DWORD PTR [%ESP + 8]
        ret

This also fixes the FIXME in the code.

BTW, this occurs in real code.  164.gzip shrinks from 8623 to 8608 lines of
.s file.  The stack frame in huft_build shrinks from 1644->1628 bytes,
inflate_codes shrinks from 116->108 bytes, and inflate_block from 2620->2612,
due to fewer spills.

Take that alkis. :-)

llvm-svn: 19639
 2005-01-17 17:55:19 +00:00
Chris Lattner
49a1f3a109 Refactor code into a new method. 
llvm-svn: 19635
 2005-01-17 17:15:02 +00:00
Chris Lattner
ec55e3e529 Implement legalize of call nodes. 
llvm-svn: 19617
 2005-01-16 19:46:48 +00:00
Chris Lattner
0eca430af1 Revamp supported ops. Instead of just being supported or not, we now keep 
track of how to deal with it, and provide the target with a hook that they
can use to legalize arbitrary operations in arbitrary ways.

Implement custom lowering for a couple of ops, implement promotion for select
operations (which x86 needs).

llvm-svn: 19613
 2005-01-16 07:29:19 +00:00
Chris Lattner
835a5efef3 add method stub 
llvm-svn: 19612
 2005-01-16 07:28:41 +00:00
Chris Lattner
907534af24 Don't mash stuff together. 
llvm-svn: 19611
 2005-01-16 07:28:31 +00:00
Chris Lattner
0f4f239899 Implement some more missing promotions. 
llvm-svn: 19606
 2005-01-16 05:06:12 +00:00
Chris Lattner
742b77f9af Clarify assertion. 
llvm-svn: 19597
 2005-01-16 02:23:34 +00:00
Chris Lattner
4517b8af97 Add assertions. 
llvm-svn: 19596
 2005-01-16 02:23:22 +00:00
Chris Lattner
9f8589f4b3 Add support for promoted registers being live across blocks. 
llvm-svn: 19595
 2005-01-16 02:23:07 +00:00
Chris Lattner
01e2ce8a4c Move some information into the TargetLowering object. 
llvm-svn: 19583
 2005-01-16 01:11:45 +00:00
Chris Lattner
9762070e50 Use the new TLI method to get this. 
llvm-svn: 19582
 2005-01-16 01:11:19 +00:00
Chris Lattner
0777f84d53 legalize a bunch of operations that I missed. 
llvm-svn: 19580
 2005-01-16 00:38:00 +00:00
Chris Lattner
1de18d422e Add support for targets that require promotions. 
llvm-svn: 19579
 2005-01-16 00:37:38 +00:00
Chris Lattner
8c4c81d6b3 Fix some serious bugs in promotion. 
llvm-svn: 19578
 2005-01-16 00:17:42 +00:00
Chris Lattner
9785def2cd Eliminate unneeded extensions. 
llvm-svn: 19577
 2005-01-16 00:17:20 +00:00
Chris Lattner
df02c93d90 Implement promotion of a whole bunch more operators. I think that this is 
basically everything.

llvm-svn: 19576
 2005-01-15 22:16:26 +00:00
Chris Lattner
f3fd0c6a93 Print extra type for nodes with extra type info. 
llvm-svn: 19575
 2005-01-15 21:11:37 +00:00
Chris Lattner
1ab9009270 Add support for legalizing FP_ROUND_INREG, SIGN_EXTEND_INREG, and 
ZERO_EXTEND_INREG for targets that don't support them.

llvm-svn: 19573
 2005-01-15 07:15:18 +00:00
Chris Lattner
191ac9c589 Common code factored out. 
llvm-svn: 19572
 2005-01-15 07:14:32 +00:00
Chris Lattner
3b20db54f3 implement these methods. 
llvm-svn: 19571
 2005-01-15 06:52:40 +00:00
Chris Lattner
fdd07b4092 Add support for promoting ADD/MUL. 
Add support for new SIGN_EXTEND_INREG, ZERO_EXTEND_INREG, and FP_ROUND_INREG operators.
Realize that if we do any promotions, we need to iterate SelectionDAG
construction.

llvm-svn: 19569
 2005-01-15 06:18:18 +00:00
Chris Lattner
2f65e8798f Add new SIGN_EXTEND_INREG, ZERO_EXTEND_INREG, and FP_ROUND_INREG operators. 
llvm-svn: 19568
 2005-01-15 06:17:04 +00:00
Chris Lattner
94b8a3e50c Add intitial support for promoting some operators. 
llvm-svn: 19565
 2005-01-15 05:21:40 +00:00
Chris Lattner
2dfbc4fddd Adjust to CopyFromReg changes, implement deletion of truncating/extending 
stores/loads.

llvm-svn: 19562
 2005-01-14 22:38:01 +00:00
Chris Lattner
0974002024 Start implementing truncating stores and extending loads. 
llvm-svn: 19559
 2005-01-14 22:08:15 +00:00
Chris Lattner
2087f3c8e9 Improve compatibility with acc 
llvm-svn: 19549
 2005-01-14 15:54:24 +00:00
Chris Lattner
7a8788c9ac Add new ImplicitDef node, rename CopyRegSDNode class to RegSDNode. 
llvm-svn: 19535
 2005-01-13 20:50:02 +00:00
Chris Lattner
9cc534f2dc Don't forget the existing root. 
llvm-svn: 19531
 2005-01-13 19:53:14 +00:00
Chris Lattner
160fdb384b Codegen independent ops as being independent. 
llvm-svn: 19528
 2005-01-13 17:59:43 +00:00
Chris Lattner
37a5de6eb0 Legalize new node, add assertion. 
llvm-svn: 19527
 2005-01-13 17:59:25 +00:00
Chris Lattner
86b19c5605 Print new node. 
llvm-svn: 19526
 2005-01-13 17:59:10 +00:00
Chris Lattner
93cb0148f8 Do not fold (zero_ext (sign_ext V)) -> (sign_ext V), they are not the same. 
This fixes llvm-test/SingleSource/Regression/C/casts.c

llvm-svn: 19519
 2005-01-12 18:51:15 +00:00
Chris Lattner
e97b0e1358 New method 
llvm-svn: 19517
 2005-01-12 18:37:47 +00:00
Chris Lattner
1b3b24f116 Fix sign extend to long. When coming from sbyte, we used to generate: 
movsbl 4(%esp), %eax
        movl %eax, %edx
        sarl $7, %edx

Now we generate:

        movsbl 4(%esp), %eax
        movl %eax, %edx
        sarl $31, %edx

Which is right.

llvm-svn: 19515
 2005-01-12 18:19:52 +00:00
Reid Spencer
c8c50250a1 Shut up warnings with GCC 3.4.3 about uninitialized variables. 
llvm-svn: 19512
 2005-01-12 14:53:45 +00:00
Chris Lattner
e7945a2e2e Add an option to view the selection dags as they are generated. 
llvm-svn: 19498
 2005-01-12 03:41:21 +00:00
Chris Lattner
74fcfd5148 Print the value types in the nodes of the graph 
llvm-svn: 19485
 2005-01-11 22:21:04 +00:00
Chris Lattner
f588cdd51e add an assertion, avoid creating copyfromreg/copytoreg pairs that are the 
same for PHI nodes.

llvm-svn: 19484
 2005-01-11 22:03:46 +00:00
Chris Lattner
8de5a27681 Squelch optimized warning. 
llvm-svn: 19475
 2005-01-11 17:46:49 +00:00
Chris Lattner
963af6652b Teach legalize to lower MEMSET/MEMCPY/MEMMOVE operations if the target 
does not support them.

llvm-svn: 19465
 2005-01-11 05:57:22 +00:00
Chris Lattner
6b9082114f Print new operations. 
llvm-svn: 19464
 2005-01-11 05:57:01 +00:00
Chris Lattner
7cde8a2658 Turn memset/memcpy/memmove into the corresponding operations. 
llvm-svn: 19463
 2005-01-11 05:56:49 +00:00
Chris Lattner
2eacd11a86 shift X, 0 -> X 
llvm-svn: 19453
 2005-01-11 04:25:13 +00:00
Chris Lattner
07a3ade230 Print SelectionDAGs bottom up, include extra info in the node labels 
llvm-svn: 19447
 2005-01-11 00:34:33 +00:00
Chris Lattner
1c273d3a14 Add a marker for the graph root. 
llvm-svn: 19445
 2005-01-10 23:52:04 +00:00
Chris Lattner
daa052a97e Put the operation name in each node, put the function name on the graph. 
llvm-svn: 19444
 2005-01-10 23:26:00 +00:00
Chris Lattner
0307506841 Split out SDNode::getOperationName into its own method. 
llvm-svn: 19443
 2005-01-10 23:25:25 +00:00
Chris Lattner
8c13447254 Implement initial selectiondag printing support. This gets us a nice 
graph with no labels! :)

llvm-svn: 19441
 2005-01-10 23:08:40 +00:00
Chris Lattner
5433d8de29 Lower to the correct functions. This fixes FreeBench/fourinarow 
llvm-svn: 19436
 2005-01-10 21:02:37 +00:00
Chris Lattner
02236df007 Implement a couple of more simplifications. This lets us codegen: 
int test2(int * P, int* Q, int A, int B) {
        return P+A == P;
}

into:

test2:
        movl 4(%esp), %eax
        movl 12(%esp), %eax
        shll $2, %eax
        cmpl $0, %eax
        sete %al
        movzbl %al, %eax
        ret

instead of:

test2:
        movl 4(%esp), %eax
        movl 12(%esp), %ecx
        leal (%eax,%ecx,4), %ecx
        cmpl %eax, %ecx
        sete %al
        movzbl %al, %eax
        ret

ICC is producing worse code:

test2:
        movl      4(%esp), %eax                                 #8.5
        movl      12(%esp), %edx                                #8.5
        lea       (%edx,%edx), %ecx                             #9.9
        addl      %ecx, %ecx                                    #9.9
        addl      %eax, %ecx                                    #9.9
        cmpl      %eax, %ecx                                    #9.16
        movl      $0, %eax                                      #9.16
        sete      %al                                           #9.16
        ret                                                     #9.16

as is GCC (looks like our old code):

test2:
        movl    4(%esp), %edx
        movl    12(%esp), %eax
        leal    (%edx,%eax,4), %ecx
        cmpl    %edx, %ecx
        sete    %al
        movzbl  %al, %eax
        ret

llvm-svn: 19430
 2005-01-10 02:03:02 +00:00
Chris Lattner
8d09b03ed1 Fix incorrect constant folds, fixing Stepanov after the SHR patch. 
llvm-svn: 19429
 2005-01-10 01:16:03 +00:00
Chris Lattner
9d479d4a34 Constant fold shifts, turning this loop: 
.LBB_Z5test0PdS__3:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        movl $16000, %ecx
        sarl $3, %ecx
        cmpl %eax, %ecx
        fstpl 16(%esp)
        #FP_REG_KILL
        jg .LBB_Z5test0PdS__3   # no_exit.1

into:

.LBB_Z5test0PdS__3:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        cmpl $2000, %eax
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__3   # no_exit.1

llvm-svn: 19427
 2005-01-10 00:07:15 +00:00
Chris Lattner
59d7066da8 Add some folds for == and != comparisons. This allows us to 
codegen this loop in stepanov:

no_exit.i:              ; preds = %entry, %no_exit.i, %then.i, %_Z5checkd.exit
        %i.0.0 = phi int [ 0, %entry ], [ %i.0.0, %no_exit.i ], [ %inc.0, %_Z5checkd.exit ], [ %inc.012, %then.i ]              ; <int> [#uses=3]
        %indvar = phi uint [ %indvar.next, %no_exit.i ], [ 0, %entry ], [ 0, %then.i ], [ 0, %_Z5checkd.exit ]          ; <uint> [#uses=3]
        %result_addr.i.0 = phi double [ %tmp.4.i.i, %no_exit.i ], [ 0.000000e+00, %entry ], [ 0.000000e+00, %then.i ], [ 0.000000e+00, %_Z5checkd.exit ]          ; <double> [#uses=1]
        %first_addr.0.i.2.rec = cast uint %indvar to int                ; <int> [#uses=1]
        %first_addr.0.i.2 = getelementptr [2000 x double]* %data, int 0, uint %indvar           ; <double*> [#uses=1]
        %inc.i.rec = add int %first_addr.0.i.2.rec, 1           ; <int> [#uses=1]
        %inc.i = getelementptr [2000 x double]* %data, int 0, int %inc.i.rec            ; <double*> [#uses=1]
        %tmp.3.i.i = load double* %first_addr.0.i.2             ; <double> [#uses=1]
        %tmp.4.i.i = add double %result_addr.i.0, %tmp.3.i.i            ; <double> [#uses=2]
        %tmp.2.i = seteq double* %inc.i, getelementptr ([2000 x double]* %data, int 0, int 2000)                ; <bool> [#uses=1]
        %indvar.next = add uint %indvar, 1              ; <uint> [#uses=1]
        br bool %tmp.2.i, label %_Z10accumulateIPddET0_T_S2_S1_.exit, label %no_exit.i

To this:

.LBB_Z4testIPddEvT_S1_T0__1:    # no_exit.i
        fldl data(,%eax,8)
        fldl 16(%esp)
        faddp %st(1)
        fstpl 16(%esp)
        incl %eax
        movl %eax, %ecx
        shll $3, %ecx
        cmpl $16000, %ecx
        #FP_REG_KILL
        jne .LBB_Z4testIPddEvT_S1_T0__1 # no_exit.i

instead of this:

.LBB_Z4testIPddEvT_S1_T0__1:    # no_exit.i
        fldl data(,%eax,8)
        fldl 16(%esp)
        faddp %st(1)
        fstpl 16(%esp)
        incl %eax
        leal data(,%eax,8), %ecx
        leal data+16000, %edx
        cmpl %edx, %ecx
        #FP_REG_KILL
        jne .LBB_Z4testIPddEvT_S1_T0__1 # no_exit.i

llvm-svn: 19425
 2005-01-09 20:52:51 +00:00
Jeff Cohen
91dd6d2d20 Fix VC++ compilation error 
llvm-svn: 19423
 2005-01-09 20:41:56 +00:00
Chris Lattner
fa06762d0e Print the DAG out more like a DAG in nested format. 
llvm-svn: 19422
 2005-01-09 20:38:33 +00:00
Chris Lattner
e3b9f22967 Print out nodes sorted by their address to make it easier to find them in a list. 
llvm-svn: 19421
 2005-01-09 20:26:36 +00:00
Chris Lattner
82caa0dc2e Add a simple transformation. This allows us to compile one of the inner 
loops in stepanov to this:

.LBB_Z5test0PdS__2:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        cmpl $2000, %eax
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__2

instead of this:

.LBB_Z5test0PdS__2:     # no_exit.1
        fldl data(,%eax,8)
        fldl 24(%esp)
        faddp %st(1)
        fstl 24(%esp)
        incl %eax
        movl $data, %ecx
        movl %ecx, %edx
        addl $16000, %edx
        subl %ecx, %edx
        movl %edx, %ecx
        sarl $2, %ecx
        shrl $29, %ecx
        addl %ecx, %edx
        sarl $3, %edx
        cmpl %edx, %eax
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__2

The old instruction selector produced:

.LBB_Z5test0PdS__2:     # no_exit.1
        fldl 24(%esp)
        faddl data(,%eax,8)
        fstl 24(%esp)
        movl %eax, %ecx
        incl %ecx
        incl %eax
        leal data+16000, %edx
        movl $data, %edi
        subl %edi, %edx
        movl %edx, %edi
        sarl $2, %edi
        shrl $29, %edi
        addl %edi, %edx
        sarl $3, %edx
        cmpl %edx, %ecx
        fstpl 16(%esp)
        #FP_REG_KILL
        jl .LBB_Z5test0PdS__2   # no_exit.1

Which is even worse!

llvm-svn: 19419
 2005-01-09 20:09:57 +00:00
Chris Lattner
d674d08230 Fix a bug legalizing call instructions (make sure to remember all result 
values), and eliminate some switch statements.

llvm-svn: 19417
 2005-01-09 19:43:23 +00:00
Chris Lattner
ac23355362 Fix a minor bug legalizing dynamic_stackalloc. This allows us to compile 
std::__pad<wchar_t, std::char_traits<wchar_t> >::_S_pad(std::ios_base&, wchar_t, wchar_t*, wchar_t const*, int, int, bool)

from libstdc++

llvm-svn: 19416
 2005-01-09 19:07:54 +00:00
Chris Lattner
b3e31c6def Teach legalize to deal with DYNAMIC_STACKALLOC (aka a dynamic llvm alloca) 
llvm-svn: 19415
 2005-01-09 19:03:49 +00:00
Chris Lattner
cc18c057cf Handle static alloca arguments to PHI nodes. 
llvm-svn: 19409
 2005-01-09 01:16:24 +00:00
Chris Lattner
3454e31bba Use new interfaces to correctly lower varargs and return/frame address intrinsics. 
llvm-svn: 19407
 2005-01-09 00:00:49 +00:00
Chris Lattner
aad3ca491d Add support for llvm.setjmp and longjmp. Only 3 SingleSource/UnitTests fail now. 
llvm-svn: 19404
 2005-01-08 22:48:57 +00:00
Chris Lattner
3b52b2f6c2 Tighten up assertions. 
llvm-svn: 19397
 2005-01-08 20:35:13 +00:00
Chris Lattner
c23687789e Silence VS warnings 
llvm-svn: 19388
 2005-01-08 19:59:10 +00:00
Chris Lattner
2dafaac5d1 Silence warnings from VS 
llvm-svn: 19386
 2005-01-08 19:55:00 +00:00
Chris Lattner
104064bf2c Silence VS warnings 
llvm-svn: 19385
 2005-01-08 19:53:50 +00:00
Chris Lattner
a58b3f48ef Silence VS warnings. 
llvm-svn: 19384
 2005-01-08 19:52:31 +00:00
Chris Lattner
38545e9952 Implement handling of most long operators through libcalls. 
Fix a bug legalizing "ret (Val,Val)"

llvm-svn: 19375
 2005-01-08 19:27:05 +00:00
Chris Lattner
60ef22ce82 Adjust to changes in LowerCAllTo interfaces 
llvm-svn: 19374
 2005-01-08 19:26:18 +00:00
Chris Lattner
fd84495692 Add support for FP->INT conversions and back. 
llvm-svn: 19369
 2005-01-08 08:08:56 +00:00
Chris Lattner
e759d984cf Implement the 'store FPIMM, Ptr' -> 'store INTIMM, Ptr' optimization for 
all targets.

llvm-svn: 19366
 2005-01-08 06:25:56 +00:00
Chris Lattner
e32ab4bd47 1ULL << 64 is undefined, don't do it. 
llvm-svn: 19365
 2005-01-08 06:24:30 +00:00
Chris Lattner
717236fcd3 Fix a pointer invalidation problem. This fixes Generic/badarg6.ll 
llvm-svn: 19361
 2005-01-07 23:32:00 +00:00
Chris Lattner
53173ba1d1 Fold conditional branches on constants away. 
llvm-svn: 19360
 2005-01-07 22:49:57 +00:00
Chris Lattner
8f55fae569 Fix a thinko in the reassociation code, fixing Generic/badlive.ll 
llvm-svn: 19359
 2005-01-07 22:44:09 +00:00
Chris Lattner
6f461f406e Add support for truncating integer casts from long. 
llvm-svn: 19358
 2005-01-07 22:37:48 +00:00
Chris Lattner
79ca9cdb7e Fix a bug in load expansion legalization and ret legalization. This fixes 
CodeGen/Generic/select.ll:castconst.

llvm-svn: 19357
 2005-01-07 22:28:47 +00:00
Chris Lattner
a834e96647 Legalize unconditional branches too 
llvm-svn: 19356
 2005-01-07 22:12:08 +00:00
Chris Lattner
3f2ce91a99 Implement support for long GEP indices on 32-bit archs and support for 
int GEP indices on 64-bit archs.

llvm-svn: 19354
 2005-01-07 21:56:57 +00:00
Chris Lattner
191554c09f Simplify: truncate ({zero|sign}_extend (X)) 
llvm-svn: 19353
 2005-01-07 21:56:24 +00:00
Chris Lattner
60e3842843 implement legalization of a bunch more operators. 
llvm-svn: 19352
 2005-01-07 21:45:56 +00:00
Chris Lattner
8c6c12da86 Fix another bug legalizing calls! 
llvm-svn: 19350
 2005-01-07 21:35:32 +00:00
Chris Lattner
86601673d6 Fix handling of dead PHI nodes. 
llvm-svn: 19349
 2005-01-07 21:34:19 +00:00
Chris Lattner
d671aa053c Fix a bug legalizing calls 
llvm-svn: 19348
 2005-01-07 21:34:13 +00:00
Chris Lattner
3871313761 After legalizing a DAG, delete dead nodes to save space. 
llvm-svn: 19346
 2005-01-07 21:09:37 +00:00
Chris Lattner
16faa6501a Implement RemoveDeadNodes 
llvm-svn: 19345
 2005-01-07 21:09:16 +00:00
Chris Lattner
39baa91b9a Teach legalize how to handle condbranches 
llvm-svn: 19339
 2005-01-07 08:19:42 +00:00
Chris Lattner
74f8f6f657 Initial implementation of the SelectionDAGISel class. This contains most 
of the code for lowering from LLVM code to a SelectionDAG.

llvm-svn: 19331
 2005-01-07 07:47:53 +00:00
Chris Lattner
89f2ccbe9c This file is obsolete 
llvm-svn: 19330
 2005-01-07 07:47:23 +00:00
Chris Lattner
fd473edcd8 Initial implementation of the DAG legalization. This still has a long way 
to go, but it does work for some non-trivial cases now.

llvm-svn: 19329
 2005-01-07 07:47:09 +00:00
Chris Lattner
c72669973a Complete rewrite of the SelectionDAG class. 
llvm-svn: 19327
 2005-01-07 07:46:32 +00:00
Chris Lattner
c1feb0c8fe Make the 2-address instruction lowering pass smarter in two ways: 
1. If we are two-addressing a commutable instruction and the LHS is not the
   last use of the variable, see if the instruction is the last use of the
   RHS.  If so, commute the instruction, allowing us to avoid a
   register-register copy in many cases for common instructions like ADD, OR,
   AND, etc on X86.
2. If #1 doesn't hold, and if this is an instruction that also existing in
   3-address form, promote the instruction to a 3-address instruction to
   avoid the register-register copy.  We can do this for several common
   instructions in X86, including ADDrr, INC, DEC, etc.

This patch implements test/Regression/CodeGen/X86/commute-two-addr.ll,
overlap-add.ll, and overlap-shift.ll when I check in the X86 support for it.

llvm-svn: 19245
 2005-01-02 02:34:12 +00:00
Chris Lattner
558a640b3c Move virtual method call out of loop 
llvm-svn: 18955
 2004-12-15 07:04:32 +00:00
Nate Begeman
85a2e38a56 Move virtual function call out of loop to speed up getFreePhysReg by about 
20%, shaving 0.1s off hbd compile time on my g5.  Yay.

llvm-svn: 18592
 2004-12-07 05:25:53 +00:00
Reid Spencer
d50c86f078 For PR387:\ 
Make only one print method to avoid overloaded virtual warnings when \
compiled with -Woverloaded-virtual

llvm-svn: 18589
 2004-12-07 04:03:45 +00:00
Chris Lattner
9245823389 Prevent accessing past the end of the intervals vector, this fixes 
Prolang-C/bison in the JIT

llvm-svn: 18477
 2004-12-04 01:22:09 +00:00
Chris Lattner
c3750aa2a3 Fix SingleSource/UnitTests/2004-11-28-GlobalBoolLayout.c, and hopefully 
PR449

llvm-svn: 18306
 2004-11-28 17:56:47 +00:00
Chris Lattner
70c19defde Fix the FIXME, nuke the JIT specific forceCompilationOf method. 
llvm-svn: 18131
 2004-11-22 21:54:35 +00:00
Chris Lattner
d38029313a These methods are obsolete 
llvm-svn: 18129
 2004-11-22 21:48:33 +00:00
Chris Lattner
37fc0d8b95 Adjust to changed interfaces 
llvm-svn: 18064
 2004-11-20 23:53:26 +00:00
Chris Lattner
c0599d0f14 Add getCurrentPCOffset() and addRelocation() methods. 
llvm-svn: 18034
 2004-11-20 03:44:39 +00:00
Chris Lattner
2978400c23 Match change in MachineCodeEmitter prototype. 
llvm-svn: 18009
 2004-11-19 20:56:46 +00:00
Chris Lattner
ccd7bfb561 * There is no reason for SpillWeights to be an instance var 
* Do not put fixed registers into the unhandled set.  This means they will
  never find their way into the inactive, active, or handled sets, so we
  can simplify a bunch of code.

llvm-svn: 17945
 2004-11-18 06:01:45 +00:00
Chris Lattner
60c90d623f There is no need to check to see if j overflowed in this loop as we're only 
incrementing i.

llvm-svn: 17944
 2004-11-18 05:28:21 +00:00
Chris Lattner
2c16205a0d Moderate head scratching reveals that this conditional is not needed. If 
i->start == j->start, then certainly i->end > j->start.

llvm-svn: 17943
 2004-11-18 05:19:02 +00:00
Chris Lattner
e9ab36314d Fix a couple of bugs where we considered physregs past their range as possibly 
intersecting an interval.

llvm-svn: 17939
 2004-11-18 04:33:31 +00:00
Chris Lattner
c23cebb206 Fix typeo 
llvm-svn: 17938
 2004-11-18 04:31:10 +00:00
Chris Lattner
3a6991f745 Start using the iterators in the fixed_ intervals to avoid having to binary 
search physreg intervals every time we access it.  This takes another
half second off of linscan.

llvm-svn: 17937
 2004-11-18 04:13:02 +00:00
Chris Lattner
189acb3955 Take another .7 seconds off of linear scan time. 
llvm-svn: 17936
 2004-11-18 04:02:11 +00:00
Chris Lattner
a52650a18a Add a counter for the number of times linscan has to backtrack. Start using 
the iterator hints we have to speed up overlaps().  This speeds linscan up
by about .2s (out of 8.7) on 175.vpr for PPC.

llvm-svn: 17935
 2004-11-18 03:49:30 +00:00
Chris Lattner
2edc3cec62 Add ability to give hints to the overlaps routines. 
llvm-svn: 17934
 2004-11-18 03:47:34 +00:00
Chris Lattner
18ced80110 * Improve comments/documentation substantially 
* Eliminate the releaseMemory method, this is not an analysis
* Change the fixed, active, and inactive lists of intervals to maintain an
  iterator for the current position in the interval.  This allows us to do
  constant time increments of the iterator instead of having to do a binary
  search to find our liverange in our liveinterval all of the time, which
  substantially speeds up cases where LiveIntervals have many LiveRanges
  - which is very common for physical registers.  On targets with many
  physregs, this can make a noticable difference.

  With a release build of LLC for PPC, this halves the time in
  processInactiveIntervals and processActiveIntervals, from 1.5s to .75s.

  This also lays the ground for more to come.

llvm-svn: 17933
 2004-11-18 02:42:27 +00:00
Chris Lattner
3bf87c8f95 Add new advanceTo method 
llvm-svn: 17932
 2004-11-18 02:37:31 +00:00
Chris Lattner
77a4102d91 Fix a minor bug in expiredAt. endNumber() is the first number that is not valid. 
llvm-svn: 17931
 2004-11-18 01:34:44 +00:00
Chris Lattner
ddc898639f Rename some methods, use 'begin' instead of 'start', add new LiveInterval 
iterator/begin/end members.

llvm-svn: 17930
 2004-11-18 01:29:39 +00:00
Brian Gaeke
23b56332bc Give a better message for a common assertion failure. 
llvm-svn: 17887
 2004-11-16 06:52:35 +00:00
Chris Lattner
bde92f3c03 Do not make i have bigger scope that we need 
llvm-svn: 17483
 2004-11-05 04:47:37 +00:00
Reid Spencer
d3f7233495 Change Library Names Not To Conflict With Others When Installed 
llvm-svn: 17286
 2004-10-27 23:18:45 +00:00
Chris Lattner
2c73917686 Move method bodies that depend on <algorithm> from MBB.h to MBB.cpp 
llvm-svn: 17253
 2004-10-26 15:43:42 +00:00
Chris Lattner
a361504a90 Clean up the MachineBasicBlock.h file, percolating #includes into this file. 
Patch contributed by Morten Ofstad

llvm-svn: 17251
 2004-10-26 15:35:58 +00:00
Chris Lattner
6e775d56cf Reduce usage of MRegisterInfo::getRegClass 
llvm-svn: 17238
 2004-10-26 05:29:18 +00:00
Chris Lattner
84b07af401 Do not use variable sized arrays in C++, they are non-portable. Patch 
contributed by Morten Ofstad

llvm-svn: 17217
 2004-10-25 18:44:14 +00:00
Chris Lattner
ec942219ad Patch to support MSVC better, contributed by Morten Ofstad 
llvm-svn: 17215
 2004-10-25 18:40:47 +00:00
Reid Spencer
e48ba34fd4 We won't use automake 
llvm-svn: 17155
 2004-10-22 03:35:04 +00:00
Reid Spencer
ce514b1c2c Initial automake generated Makefile template 
llvm-svn: 17136
 2004-10-18 23:55:41 +00:00
Chris Lattner
8d479b62ad Add support for undef 
llvm-svn: 17055
 2004-10-16 18:19:26 +00:00
Chris Lattner
65976f4178 Allow machine operands to represent global variables with offsets. This is 
useful when you have a reference like:

int A[100];

void foo() { A[10] = 1; }

In this case, &A[10] is a single constant and should be treated as such.

Only MO_GlobalAddress and MO_ExternalSymbol are allowed to use this field, no
other operand type is.

This is another fine patch contributed by Jeff Cohen!!

llvm-svn: 17007
 2004-10-15 04:38:41 +00:00
Chris Lattner
34acee9dbd This patch fixes the nasty bug that caused 175.vpr to fail for X86 last night. 
The problem occurred when trying to reload this instruction:

MOV32mr %reg2326, 8, %reg2297, 4, %reg2295

The value of reg2326 was available in EBX, so it was reused from there, instead
of reloading it into EDX.

The value of reg2297 was available in EDX, so it was reused from there, instead
of reloading it into EDI.

The value of reg2295 was not available, so we tried reloading it into EBX, its
assigned register.  However, we checked and saw that we already reloaded
something into EBX, so we chose what reg2326 was assigned to (EDX) and reloaded
into that register instead.

Unfortunately EDX had already been used by reg2297, so reloading into EDX
clobbered the value used by the reg2326 operand, breaking the program.

The fix for this is to check that the newly picked register is ok.  In this
case we now find that EDX is already used and try using EDI, which succeeds.

llvm-svn: 17006
 2004-10-15 03:19:31 +00:00
Chris Lattner
2c87b68231 This patch adds and improves debugging output. No functionality changes. 
llvm-svn: 17005
 2004-10-15 03:16:29 +00:00
Reid Spencer
e6418ec30f Update to reflect changes in Makefile rules. 
llvm-svn: 16950
 2004-10-13 11:46:52 +00:00
Misha Brukman
5e9e7cada2 ModuloScheduling has moved to lib/Target/SparcV9 
llvm-svn: 16906
 2004-10-10 23:37:40 +00:00
Misha Brukman
020c3ab94c ModuloScheduling moved to lib/Target/SparcV9 as it is SparcV9-specific 
llvm-svn: 16902
 2004-10-10 23:33:20 +00:00
Tanya Lattner
be65f6cd02 Added debug information. Fixed several bugs in the reconstruct loop function. 
llvm-svn: 16895
 2004-10-10 22:44:35 +00:00
Reid Spencer
b317fd443c Remove the InstrSched directory (moved to SparcV9) 
llvm-svn: 16887
 2004-10-10 21:19:41 +00:00
Reid Spencer
064bebfba3 Directory no long exists (moved to Targets/SparcV9). 
llvm-svn: 16886
 2004-10-10 21:18:31 +00:00
Reid Spencer
7d9cba7a0f Initial version of automake Makefile.am file. 
llvm-svn: 16885
 2004-10-10 20:43:57 +00:00
Misha Brukman
af84f00600 Hyphenate target-(in)dependent for more tasty grammar goodness (tm) 
llvm-svn: 16854
 2004-10-08 19:43:31 +00:00
Misha Brukman
a01e5cd2ea InstrSched has been moved to lib/Target/SparcV9 
llvm-svn: 16850
 2004-10-08 18:12:53 +00:00
Misha Brukman
049f559995 InstrSched is SparcV9-specific and so has been moved to lib/Target/SparcV9/ 
llvm-svn: 16849
 2004-10-08 18:12:14 +00:00
Misha Brukman
5ea7613a13 Single-space instead of double-spacing in the Makefile 
llvm-svn: 16845
 2004-10-08 18:05:25 +00:00
Chris Lattner
815b635639 Do not repeat the map lookup 
llvm-svn: 16633
 2004-10-01 23:16:43 +00:00
Chris Lattner
c521544a32 When a virtual register is folded into an instruction, keep track of whether 
it was a use, def, or both.  This allows us to be less pessimistic in our
analysis of them.  In practice, this doesn't make a big difference, but it
doesn't hurt either.

llvm-svn: 16632
 2004-10-01 23:15:36 +00:00
Chris Lattner
38467b8a66 Add a simple little improvement to the local spiller to keep track of stores 
and delete them if they turn out to be dead.  This is a useful little hack
that even speeds up some programs.  For example, it speeds up Ptrdist/ks
from 17.53s to 15.59s, and 188.ammp from 149s to 146s.

This also speeds up llc :)

llvm-svn: 16630
 2004-10-01 19:47:12 +00:00
Chris Lattner
8a5b40154f Substantially revamp the local spiller, causing it to actually improve the 
generated code over the simple spiller.  The new local spiller generates
substantially better code than the simple one in some cases, by reusing
values that are loaded out of stack slots and kept available in registers.

This primarily helps programs that are spilling a lot, and there is still
stuff that can be done to improve it.  This patch makes the local spiller
the default, as it's only a tiny bit slower than the simple spiller (it
increases the runtime of llc by < 1%).

Here are some numbers with speedups.

Program    #reuse  old(s)    new(s)  Speedup

Povray:     3452,  16.87 ->  15.93   (5.5%)
177.mesa:   2176,   2.77 ->   2.76   (0%)
179.art:      35,  28.43 ->  28.01   (1.5%)
183.equake:   55,  61.44 ->  61.41   (0%)
188.ammp:    869, 174    -> 149      (15%)

164.gzip:     43,  40.73 ->  40.71   (0%)
175.vpr:     351,  18.54 ->  17.34   (6.5%)
176.gcc:    2471,   5.01 ->   4.92   (1.8%)
181.mcf       42,  79.30 ->  75.20   (5.2%)
186.crafty:  484,  29.73 ->  30.04   (-1%)
197.parser:  251,  10.47 ->  10.67   (-1%)
252.eon:    1501,   1.98 ->   1.75   (12%)
253.perlbm: 1183,  14.83 ->  14.42   (2.8%)
254.gap:     825,   7.46 ->   7.29   (2.3%)
255.vortex:  285,  10.51 ->  10.27   (2.3%)
256.bzip2:    63,  55.70 ->  55.20   (0.9%)
300.twolf:   830,  21.63 ->  22.00   (-1%)

PtrDist/ks    14,  32.75 -> 17.53    (46.5%)
Olden/tsp     46,   8.71 ->  8.24    (5.4%)
Free/distray  70,   1.09 ->  0.99    (9.2%)

llvm-svn: 16629
 2004-10-01 19:04:51 +00:00
Chris Lattner
2ddd74fa8b Pretty print a bit nicer :) 
llvm-svn: 16628
 2004-10-01 19:01:39 +00:00
Alkis Evlogimenos
8e4ed30dcb Document this class a bit :-) 
llvm-svn: 16626
 2004-10-01 00:35:07 +00:00
Chris Lattner
db2a0987cc Use more efficient map operations. Fix a bug that would affect hypothetical 
targets that supported multiple memory operands.

llvm-svn: 16614
 2004-09-30 16:35:08 +00:00
Chris Lattner
8d8b8b05bd There is no need to call MachineInstr::print directly, just send the MI& to an ostream. 
llvm-svn: 16613
 2004-09-30 16:10:45 +00:00
Chris Lattner
bb425800f5 * Wrap some comments to 80 cols 
* Add const_iterator stuff
* Add a print method, which means that I can now call dump() from the
  debugger.

llvm-svn: 16612
 2004-09-30 15:59:17 +00:00
Chris Lattner
168a4380d9 Simplify the logic in the simple spiller and capitalize some variables 
llvm-svn: 16609
 2004-09-30 02:59:33 +00:00
Chris Lattner
1f61bfb971 Switch from defaulting to the 'local' spiller to the 'simple' spiller. The 
two spillers produce perfectly identical code (at least on povray and eon),
but the simple spiller is substantially faster than the local spiller. Once
the local spiller is improved, we can switch back.

Switching cuts 5.2% off of the llc time for povray (about 1.3s).

llvm-svn: 16608
 2004-09-30 02:40:06 +00:00
Chris Lattner
d716b5739c Don't use a densemap for keeping track of which vregs are already loaded, just 
use a simple vector.  This speeds up -spiller=simple from taking 22s to taking
.1s on povray (debug build).  This change does not modify the generated code.

llvm-svn: 16607
 2004-09-30 02:33:48 +00:00
Chris Lattner
d27ff8035e Use longer and more explicit names for instance vars (particularly important 
data structures).  Fix the print method to send to the right ostream, not
always cerr.  Delete typedefs that are only used once.

llvm-svn: 16606
 2004-09-30 02:15:18 +00:00
Chris Lattner
962d398430 Free the VirtRegMap at the end of MachineFunction processing instead of at 
the beginning of processing the next one.

llvm-svn: 16605
 2004-09-30 02:02:33 +00:00