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1434 Commits

Author SHA1 Message Date
Chris Lattner 4e550ebb38 Add assertions. 
llvm-svn: 19596
 2005-01-16 02:23:22 +00:00
Chris Lattner 209f585033 Add support for promoted registers being live across blocks. 
llvm-svn: 19595
 2005-01-16 02:23:07 +00:00
Chris Lattner 87a769cbd4 Move some information into the TargetLowering object. 
llvm-svn: 19583
 2005-01-16 01:11:45 +00:00
Chris Lattner d58384fca6 Use the new TLI method to get this. 
llvm-svn: 19582
 2005-01-16 01:11:19 +00:00
Chris Lattner 71d7f6e86f legalize a bunch of operations that I missed. 
llvm-svn: 19580
 2005-01-16 00:38:00 +00:00
Chris Lattner a8d34fb8c6 Add support for targets that require promotions. 
llvm-svn: 19579
 2005-01-16 00:37:38 +00:00
Chris Lattner 207a962c2c Fix some serious bugs in promotion. 
llvm-svn: 19578
 2005-01-16 00:17:42 +00:00
Chris Lattner 0fe7776da5 Eliminate unneeded extensions. 
llvm-svn: 19577
 2005-01-16 00:17:20 +00:00
Chris Lattner 4d97864e92 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 630d1937bf Print extra type for nodes with extra type info. 
llvm-svn: 19575
 2005-01-15 21:11:37 +00:00
Chris Lattner 99222f706c 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 09d1b3d01d Common code factored out. 
llvm-svn: 19572
 2005-01-15 07:14:32 +00:00
Chris Lattner 5d24d61ae8 implement these methods. 
llvm-svn: 19571
 2005-01-15 06:52:40 +00:00
Chris Lattner c6c9a5b07d 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 1001c6e2cd 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 1f2c9d82fa Add intitial support for promoting some operators. 
llvm-svn: 19565
 2005-01-15 05:21:40 +00:00
Chris Lattner 3b8e719d1d Adjust to CopyFromReg changes, implement deletion of truncating/extending 
stores/loads.

llvm-svn: 19562
 2005-01-14 22:38:01 +00:00
Chris Lattner 39c6744c9f Start implementing truncating stores and extending loads. 
llvm-svn: 19559
 2005-01-14 22:08:15 +00:00
Chris Lattner 0ad02bdd3d Improve compatibility with acc 
llvm-svn: 19549
 2005-01-14 15:54:24 +00:00
Chris Lattner e727af06c8 Add new ImplicitDef node, rename CopyRegSDNode class to RegSDNode. 
llvm-svn: 19535
 2005-01-13 20:50:02 +00:00
Chris Lattner 2451684678 Don't forget the existing root. 
llvm-svn: 19531
 2005-01-13 19:53:14 +00:00
Chris Lattner 718b5c2f82 Codegen independent ops as being independent. 
llvm-svn: 19528
 2005-01-13 17:59:43 +00:00
Chris Lattner 05b4e37e85 Legalize new node, add assertion. 
llvm-svn: 19527
 2005-01-13 17:59:25 +00:00
Chris Lattner 4b1be0dfeb Print new node. 
llvm-svn: 19526
 2005-01-13 17:59:10 +00:00
Chris Lattner 4dfd2cfc0c 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 40e7982c2c New method 
llvm-svn: 19517
 2005-01-12 18:37:47 +00:00
Chris Lattner 9864b08f94 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 6dced92447 Shut up warnings with GCC 3.4.3 about uninitialized variables. 
llvm-svn: 19512
 2005-01-12 14:53:45 +00:00
Chris Lattner e05a461f1d 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 c2785562f1 Print the value types in the nodes of the graph 
llvm-svn: 19485
 2005-01-11 22:21:04 +00:00
Chris Lattner 613f79fcbb 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 f49c27c65c Squelch optimized warning. 
llvm-svn: 19475
 2005-01-11 17:46:49 +00:00
Chris Lattner 85d70c6fd5 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 844277fb1e Print new operations. 
llvm-svn: 19464
 2005-01-11 05:57:01 +00:00
Chris Lattner 875def9b71 Turn memset/memcpy/memmove into the corresponding operations. 
llvm-svn: 19463
 2005-01-11 05:56:49 +00:00
Chris Lattner a86fa4455b shift X, 0 -> X 
llvm-svn: 19453
 2005-01-11 04:25:13 +00:00
Chris Lattner 1308b488ea Print SelectionDAGs bottom up, include extra info in the node labels 
llvm-svn: 19447
 2005-01-11 00:34:33 +00:00
Chris Lattner b241b443b6 Add a marker for the graph root. 
llvm-svn: 19445
 2005-01-10 23:52:04 +00:00
Chris Lattner 12be02722f 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 9e4c76123c Split out SDNode::getOperationName into its own method. 
llvm-svn: 19443
 2005-01-10 23:25:25 +00:00
Chris Lattner 7f65075be3 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 be02d430a9 Lower to the correct functions. This fixes FreeBench/fourinarow 
llvm-svn: 19436
 2005-01-10 21:02:37 +00:00
Chris Lattner 41b764144d 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 00c231baa7 Fix incorrect constant folds, fixing Stepanov after the SHR patch. 
llvm-svn: 19429
 2005-01-10 01:16:03 +00:00
Chris Lattner 0966a75e76 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 fde3a212e2 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 7d1670da3f Fix VC++ compilation error 
llvm-svn: 19423
 2005-01-09 20:41:56 +00:00
Chris Lattner e6f7882c27 Print the DAG out more like a DAG in nested format. 
llvm-svn: 19422
 2005-01-09 20:38:33 +00:00
Chris Lattner 1270acc1ce 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 3d5d5022d5 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 9242c504da 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 02f5ce2077 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 ec26b48d61 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 a2c5d9168c Handle static alloca arguments to PHI nodes. 
llvm-svn: 19409
 2005-01-09 01:16:24 +00:00
Chris Lattner 58cfd7945d 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 18d2b34637 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 c0f31c5e96 Tighten up assertions. 
llvm-svn: 19397
 2005-01-08 20:35:13 +00:00
Chris Lattner 0b955fd2d5 Silence VS warnings 
llvm-svn: 19388
 2005-01-08 19:59:10 +00:00
Chris Lattner e64ff1c4b2 Silence warnings from VS 
llvm-svn: 19386
 2005-01-08 19:55:00 +00:00
Chris Lattner 78100c41ca Silence VS warnings 
llvm-svn: 19385
 2005-01-08 19:53:50 +00:00
Chris Lattner d006195517 Silence VS warnings. 
llvm-svn: 19384
 2005-01-08 19:52:31 +00:00
Chris Lattner 7e6eeba6c5 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 1f45cd7418 Adjust to changes in LowerCAllTo interfaces 
llvm-svn: 19374
 2005-01-08 19:26:18 +00:00
Chris Lattner 2a6db3c351 Add support for FP->INT conversions and back. 
llvm-svn: 19369
 2005-01-08 08:08:56 +00:00
Chris Lattner e69daaf71d 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 9a97e4d5b6 1ULL << 64 is undefined, don't do it. 
llvm-svn: 19365
 2005-01-08 06:24:30 +00:00
Chris Lattner e0f1fe181a Fix a pointer invalidation problem. This fixes Generic/badarg6.ll 
llvm-svn: 19361
 2005-01-07 23:32:00 +00:00
Chris Lattner 5c66e45b92 Fold conditional branches on constants away. 
llvm-svn: 19360
 2005-01-07 22:49:57 +00:00
Chris Lattner cda3efa6e5 Fix a thinko in the reassociation code, fixing Generic/badlive.ll 
llvm-svn: 19359
 2005-01-07 22:44:09 +00:00
Chris Lattner a65a2f0c36 Add support for truncating integer casts from long. 
llvm-svn: 19358
 2005-01-07 22:37:48 +00:00
Chris Lattner ea4ca94cae 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 68a12140c0 Legalize unconditional branches too 
llvm-svn: 19356
 2005-01-07 22:12:08 +00:00
Chris Lattner 19a83990e1 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 4d5ba99283 Simplify: truncate ({zero|sign}_extend (X)) 
llvm-svn: 19353
 2005-01-07 21:56:24 +00:00
Chris Lattner 32f20bfa93 implement legalization of a bunch more operators. 
llvm-svn: 19352
 2005-01-07 21:45:56 +00:00
Chris Lattner fa854eb012 Fix another bug legalizing calls! 
llvm-svn: 19350
 2005-01-07 21:35:32 +00:00
Chris Lattner 8ea875fb05 Fix handling of dead PHI nodes. 
llvm-svn: 19349
 2005-01-07 21:34:19 +00:00
Chris Lattner f025d6788c Fix a bug legalizing calls 
llvm-svn: 19348
 2005-01-07 21:34:13 +00:00
Chris Lattner 473825ccec After legalizing a DAG, delete dead nodes to save space. 
llvm-svn: 19346
 2005-01-07 21:09:37 +00:00
Chris Lattner 9c667933c1 Implement RemoveDeadNodes 
llvm-svn: 19345
 2005-01-07 21:09:16 +00:00
Chris Lattner ec3fe7c4a8 Teach legalize how to handle condbranches 
llvm-svn: 19339
 2005-01-07 08:19:42 +00:00
Chris Lattner 7a60d91953 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 f8ba6987a4 This file is obsolete 
llvm-svn: 19330
 2005-01-07 07:47:23 +00:00
Chris Lattner dc75059005 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 061a1ea9e3 Complete rewrite of the SelectionDAG class. 
llvm-svn: 19327
 2005-01-07 07:46:32 +00:00
Chris Lattner 9590870a0d 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 e09dbe2732 Move virtual method call out of loop 
llvm-svn: 18955
 2004-12-15 07:04:32 +00:00
Nate Begeman 784a0dcbd0 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 9083936835 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 5684f4817f 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 ebb54c55e1 Fix SingleSource/UnitTests/2004-11-28-GlobalBoolLayout.c, and hopefully 
PR449

llvm-svn: 18306
 2004-11-28 17:56:47 +00:00
Chris Lattner 88dc917c72 Fix the FIXME, nuke the JIT specific forceCompilationOf method. 
llvm-svn: 18131
 2004-11-22 21:54:35 +00:00
Chris Lattner 213e39ee7c These methods are obsolete 
llvm-svn: 18129
 2004-11-22 21:48:33 +00:00
Chris Lattner 5f3d274f5f Adjust to changed interfaces 
llvm-svn: 18064
 2004-11-20 23:53:26 +00:00
Chris Lattner f6fcf39aed Add getCurrentPCOffset() and addRelocation() methods. 
llvm-svn: 18034
 2004-11-20 03:44:39 +00:00
Chris Lattner c27389815d Match change in MachineCodeEmitter prototype. 
llvm-svn: 18009
 2004-11-19 20:56:46 +00:00
Chris Lattner b75e790a2b * 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 e3b9cb9959 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 6e0c3f44ba 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 08ec603bb0 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 cf972ff7cb Fix typeo 
llvm-svn: 17938
 2004-11-18 04:31:10 +00:00
Chris Lattner 49ff5f0477 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 7598c316e5 Take another .7 seconds off of linear scan time. 
llvm-svn: 17936
 2004-11-18 04:02:11 +00:00
Chris Lattner 850852c789 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 cb0c9655bf Add ability to give hints to the overlaps routines. 
llvm-svn: 17934
 2004-11-18 03:47:34 +00:00
Chris Lattner a1f7779876 * 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 0624f95175 Add new advanceTo method 
llvm-svn: 17932
 2004-11-18 02:37:31 +00:00
Chris Lattner 7d92fc7e89 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 a51f5eeac1 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 a057cd2401 Give a better message for a common assertion failure. 
llvm-svn: 17887
 2004-11-16 06:52:35 +00:00
Chris Lattner c22ffc26b0 Do not make i have bigger scope that we need 
llvm-svn: 17483
 2004-11-05 04:47:37 +00:00
Reid Spencer 57cbe39d1e Change Library Names Not To Conflict With Others When Installed 
llvm-svn: 17286
 2004-10-27 23:18:45 +00:00
Chris Lattner 4336b87f2c 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 c8b07dd339 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 b56cb729bd Reduce usage of MRegisterInfo::getRegClass 
llvm-svn: 17238
 2004-10-26 05:29:18 +00:00
Chris Lattner 6180881673 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 111c3e827e Patch to support MSVC better, contributed by Morten Ofstad 
llvm-svn: 17215
 2004-10-25 18:40:47 +00:00
Reid Spencer c1c320c335 We won't use automake 
llvm-svn: 17155
 2004-10-22 03:35:04 +00:00
Reid Spencer 6a11a75f31 Initial automake generated Makefile template 
llvm-svn: 17136
 2004-10-18 23:55:41 +00:00
Chris Lattner 61753bf847 Add support for undef 
llvm-svn: 17055
 2004-10-16 18:19:26 +00:00
Chris Lattner 3065220deb 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 2152236351 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 9af0572a37 This patch adds and improves debugging output. No functionality changes. 
llvm-svn: 17005
 2004-10-15 03:16:29 +00:00
Reid Spencer ace94df71f Update to reflect changes in Makefile rules. 
llvm-svn: 16950
 2004-10-13 11:46:52 +00:00
Misha Brukman 1df01504c6 ModuloScheduling has moved to lib/Target/SparcV9 
llvm-svn: 16906
 2004-10-10 23:37:40 +00:00
Misha Brukman 4a4af7e20c ModuloScheduling moved to lib/Target/SparcV9 as it is SparcV9-specific 
llvm-svn: 16902
 2004-10-10 23:33:20 +00:00
Tanya Lattner dbac0cb21e Added debug information. Fixed several bugs in the reconstruct loop function. 
llvm-svn: 16895
 2004-10-10 22:44:35 +00:00
Reid Spencer f92cbf5bb8 Remove the InstrSched directory (moved to SparcV9) 
llvm-svn: 16887
 2004-10-10 21:19:41 +00:00
Reid Spencer e975e4534c Directory no long exists (moved to Targets/SparcV9). 
llvm-svn: 16886
 2004-10-10 21:18:31 +00:00
Reid Spencer b84cbf2725 Initial version of automake Makefile.am file. 
llvm-svn: 16885
 2004-10-10 20:43:57 +00:00
Misha Brukman 84e5ff7605 Hyphenate target-(in)dependent for more tasty grammar goodness (tm) 
llvm-svn: 16854
 2004-10-08 19:43:31 +00:00
Misha Brukman cb54d5dfae InstrSched has been moved to lib/Target/SparcV9 
llvm-svn: 16850
 2004-10-08 18:12:53 +00:00
Misha Brukman 24eb38af7c 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 73dce3a6bf Single-space instead of double-spacing in the Makefile 
llvm-svn: 16845
 2004-10-08 18:05:25 +00:00
Chris Lattner 00db230c7c Do not repeat the map lookup 
llvm-svn: 16633
 2004-10-01 23:16:43 +00:00
Chris Lattner 1905ae69c1 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 04f52079d7 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 d3b1f6c703 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 f06f4a7c68 Pretty print a bit nicer :) 
llvm-svn: 16628
 2004-10-01 19:01:39 +00:00
Alkis Evlogimenos cc37da1bcc Document this class a bit :-) 
llvm-svn: 16626
 2004-10-01 00:35:07 +00:00
Chris Lattner b5b4a2f76b 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 55c1402f25 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 b0b707fc75 * 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 c2812121cd Simplify the logic in the simple spiller and capitalize some variables 
llvm-svn: 16609
 2004-09-30 02:59:33 +00:00
Chris Lattner 1c5942fee9 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 28bc753cac 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 39fef8df03 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 ddd5229f3b 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
Chris Lattner e2b77d57c0 Reindent code, improve comments, move huge nested methods out of classes, 
prune #includes, add print/dump methods, etc.  No functionality changes.

llvm-svn: 16604
 2004-09-30 01:54:45 +00:00
Alkis Evlogimenos 20f1b0bafb Add includes and use std:: for standard library calls to make code 
compile on windows. This patch was contributed by Paolo Invernizzi.

llvm-svn: 16539
 2004-09-28 14:42:44 +00:00