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6084 Commits

Author SHA1 Message Date
Chris Lattner
411e888c1b Legalize BRCONDTWOWAY into a BRCOND/BR pair if a target doesn't support it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21166 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 03:30:19 +00:00
Chris Lattner
ef847df087 print and fold BRCONDTWOWAY correctly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21165 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 03:27:28 +00:00
Chris Lattner
485df9b84b canonicalize a bunch of operations involving fneg 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21160 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 03:02:46 +00:00
Chris Lattner
5a6bace3ab If a target zero or sign extends the result of its setcc, allow folding of 
this into sign/zero extension instructions later.

On PPC, for example, this testcase:

%G = external global sbyte
implementation
void %test(int %X, int %Y) {
  %C = setlt int %X, %Y
  %D = cast bool %C to sbyte
  store sbyte %D, sbyte* %G
  ret void
}

Now codegens to:

        cmpw cr0, r3, r4
        li r3, 1
        li r4, 0
        blt .LBB_test_2 ;
.LBB_test_1:    ;
        or r3, r4, r4
.LBB_test_2:    ;
        addis r2, r2, ha16(L_G$non_lazy_ptr-"L00000$pb")
        lwz r2, lo16(L_G$non_lazy_ptr-"L00000$pb")(r2)
        stb r3, 0(r2)

instead of:

        cmpw cr0, r3, r4
        li r3, 1
        li r4, 0
        blt .LBB_test_2 ;
.LBB_test_1:    ;
        or r3, r4, r4
.LBB_test_2:    ;
***     rlwinm r3, r3, 0, 31, 31
        addis r2, r2, ha16(L_G$non_lazy_ptr-"L00000$pb")
        lwz r2, lo16(L_G$non_lazy_ptr-"L00000$pb")(r2)
        stb r3, 0(r2)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21148 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 19:43:53 +00:00
Chris Lattner
2467392c59 Remove somethign I had for testing 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21144 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 18:58:54 +00:00
Chris Lattner
67255a1d17 This patch does two things. First, it canonicalizes 'X >= C' -> 'X > C-1' 
(likewise for <= >=u >=u).

Second, it implements a special case hack to turn 'X gtu SINTMAX' -> 'X lt 0'

On powerpc, for example, this changes this:

        lis r2, 32767
        ori r2, r2, 65535
        cmplw cr0, r3, r2
        bgt .LBB_test_2

into:

        cmpwi cr0, r3, 0
        blt .LBB_test_2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21142 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 18:14:58 +00:00
Chris Lattner
8e8bd656b3 Fix a really scary bug that Nate found where we weren't deleting the right 
elements auto of the autoCSE maps.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21128 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 00:30:13 +00:00
Nate Begeman
f1fe32e337 Teach ExpandShift how to handle shifts by a constant. This allows targets 
like PowerPC to codegen long shifts in many fewer instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21122 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 21:13:14 +00:00
Nate Begeman
c105e19864 Expand SREM and UREM for targets that claim not to have them, like PowerPC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21103 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 00:23:54 +00:00
Nate Begeman
1867054643 Add MULHU and MULHS nodes for the high part of an (un)signed 32x32=64b 
multiply.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21102 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-05 22:36:56 +00:00
Nate Begeman
79e46acd35 Handle expanding arguments to ISD::TRUNCATE. This happens on PowerPC when 
you have something like i16 = truncate i64.  This fixes Regression/C/casts


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21073 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-04 00:57:08 +00:00
Chris Lattner
06098e0e9b Fix sign_extend and zero_extend of promoted value types to expanded value 
types.  This occurs when casting short to long on PPC for example.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21072 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-03 23:41:52 +00:00
Chris Lattner
c0f18152d9 transform fabs/fabsf calls into FABS nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21014 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 05:26:53 +00:00
Chris Lattner
4af6e0d783 Expand fabs into fneg 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21013 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 05:26:37 +00:00
Chris Lattner
b9fccc4193 Turn -0.0 - X -> fneg 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21011 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 05:04:50 +00:00
Chris Lattner
2c8086f4b9 Several changes mixed up here. First when legalizing a DAG with pcmarker, 
dont' regen the whole dag if unneccesary.  Second, fix and ugly bug with
the _PARTS nodes that caused legalize to produce multiples of them.
Finally, implement initial support for FABS and FNEG.  Currently FNEG is
the only one to be trusted though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21009 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 05:00:07 +00:00
Chris Lattner
ff9fd0a99c print fneg/fabs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21008 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 04:58:41 +00:00
Chris Lattner
5b359c6c4f fix some bugs in the implementation of SHL_PARTS and friends. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21004 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 04:00:59 +00:00
Chris Lattner
4759982a2d Turn expanded shift operations into (e.g.) SHL_PARTS if the target supports it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21002 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 03:38:53 +00:00
Chris Lattner
41be951a47 Print some new nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21001 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 03:30:42 +00:00
Chris Lattner
f4b457987f Fix a bug when inserting a libcall into a function with no other calls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20999 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 03:22:40 +00:00
Nate Begeman
ea19cd51aa Fix a warning about an unhandled switch case 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20994 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 00:41:14 +00:00
Nate Begeman
fc1b1dad88 Add ISD::UNDEF node 
Teach the SelectionDAG code how to expand and promote it
Have PPC32 LowerCallTo generate ISD::UNDEF for int arg regs used up by fp
  arguments, but not shadowing their value.  This allows us to do the right
  thing with both fixed and vararg floating point arguments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20988 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-01 22:34:39 +00:00
Andrew Lenharth
95762124a1 PCMarker support for DAG and Alpha 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20965 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-31 21:24:06 +00:00
Chris Lattner
a33ef4816d Instead of setting up the CFG edges at selectiondag construction time, set 
them up after the code has been emitted.  This allows targets to select one
mbb as multiple mbb's as needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20937 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-30 01:10:47 +00:00
Chris Lattner
f51d3bd676 Fix a bug that andrew noticed where we do not correctly sign/zero extend 
returned integer values all of the way to 64-bits (we only did it to 32-bits
leaving the top bits undefined).  This causes problems for targets like alpha
whose ABI's define the top bits too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20926 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-29 19:09:56 +00:00
Chris Lattner
d4e50bb2e2 implement legalization of build_pair for nate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20901 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-28 22:03:13 +00:00
Nate Begeman
8e21e71b24 Change interface to LowerCallTo to take a boolean isVarArg argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20842 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-26 01:29:23 +00:00
Chris Lattner
e4d5c441e0 This mega patch converts us from using Function::a{iterator|begin|end} to 
using Function::arg_{iterator|begin|end}.  Likewise Module::g* -> Module::global_*.

This patch is contributed by Gabor Greif, thanks!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20597 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-15 04:54:21 +00:00
Chris Lattner
ee639f1760 Fix a bug where we would incorrectly do a sign ext instead of a zero ext 
because we were checking the wrong thing.  Thanks to andrew for pointing
this out!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20554 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-10 20:55:51 +00:00
Chris Lattner
14723c264d constant fold FP_ROUND_INREG, ZERO_EXTEND_INREG, and SIGN_EXTEND_INREG 
This allows the alpha backend to compile:

bool %test(uint %P) {
        %c = seteq uint %P, 0
        ret bool %c
}

into:

test:
        ldgp $29, 0($27)
        ZAP $16,240,$0
        CMPEQ $0,0,$0
        AND $0,1,$0
        ret $31,($26),1

instead of:

test:
        ldgp $29, 0($27)
        ZAP $16,240,$0
        ldiq $1,0
        ZAP $1,240,$1
        CMPEQ $0,$1,$0
        AND $0,1,$0
        ret $31,($26),1

... and fixes PR534.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20534 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-09 18:37:12 +00:00
Chris Lattner
84734ce8ef Fix a bug in the 'store fpimm, ptr' -> 'store intimm, ptr' handling code. 
Changing 'op' here caused us to not enter the store into a map, causing
reemission of the code!!  In practice, a simple loop like this:

no_exit:                ; preds = %no_exit, %entry
        %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ]            ; <uint> [#uses=3]
        %tmp.4 = getelementptr "complex long double"* %P, uint %indvar, uint 0          ; <double*> [#uses=1]
        store double 0.000000e+00, double* %tmp.4
        %indvar.next = add uint %indvar, 1              ; <uint> [#uses=2]
        %exitcond = seteq uint %indvar.next, %N         ; <bool> [#uses=1]
        br bool %exitcond, label %return, label %no_exit

was being code gen'd to:

.LBBtest_1:     # no_exit
        movl %edx, %esi
        shll $4, %esi
        movl $0, 4(%eax,%esi)
        movl $0, (%eax,%esi)
        incl %edx
        movl $0, (%eax,%esi)
        movl $0, 4(%eax,%esi)
        cmpl %ecx, %edx
        jne .LBBtest_1  # no_exit

Note that we are doing 4 32-bit stores instead of 2.  Now we generate:

.LBBtest_1:     # no_exit
        movl %edx, %esi
        incl %esi
        shll $4, %edx
        movl $0, (%eax,%edx)
        movl $0, 4(%eax,%edx)
        cmpl %ecx, %esi
        movl %esi, %edx
        jne .LBBtest_1  # no_exit

This is much happier, though it would be even better if the increment of ESI
was scheduled after the compare :-/


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20265 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-22 07:23:39 +00:00
Misha Brukman
d3f03e4b50 Fix compilation errors with VS 2005, patch by Aaron Gray. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20231 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-17 21:39:27 +00:00
Chris Lattner
d8658616cf Don't rely on doubles comparing identical to each other, which doesn't work 
for 0.0 and -0.0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20230 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-17 20:17:32 +00:00
Chris Lattner
aa781b3404 Don't sink argument loads into loops or other bad places. This disables folding of argument loads with instructions that are not in the entry block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20228 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-17 19:40:32 +00:00
Chris Lattner
595dc5408a Fix a case where were incorrectly compiled cast from short to int on 64-bit 
targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20030 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-04 18:39:19 +00:00
Chris Lattner
272455b404 Fix yet another memset issue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19986 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-02 03:44:41 +00:00
Chris Lattner
deb692e756 Fix some bugs andrew noticed legalizing memset for alpha 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19969 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-01 18:38:28 +00:00
Chris Lattner
99939d39c9 Alpha doesn't have a native f32 extload instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19880 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-28 22:58:25 +00:00
Chris Lattner
e76ad6de40 implement legalization of truncates whose results and sources need to be 
truncated, e.g. (truncate:i8 something:i16) on a 32 or 64-bit RISC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19879 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-28 22:52:50 +00:00
Chris Lattner
e560521f1a Get alpha working with memset/memcpy/memmove 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19878 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-28 22:29:18 +00:00
Chris Lattner
13c184de29 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19866 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-28 06:27:38 +00:00
Chris Lattner
fed5577066 Silence optimized warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19797 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-23 23:19:44 +00:00
Chris Lattner
9c32d3b798 Adjust to changes in SelectionDAG interfaces 
The first half of correct chain insertion for libcalls. This is not enough
to fix Fhourstones yet though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19781 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-23 04:42:50 +00:00
Chris Lattner
b48da39536 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19780 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-23 04:39:44 +00:00
Chris Lattner
ac9dc08c7f Adjust to changes in SelectionDAG interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19779 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-23 04:36:26 +00:00
Chris Lattner
68cd65ea68 Get this to work for 64-bit systems. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19763 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 23:04:37 +00:00
Chris Lattner
7cd50cf286 More bugfixes for IA64 shifts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19739 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 00:33:03 +00:00
Chris Lattner
27ff112948 Fix problems with non-x86 targets. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19738 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 00:31:52 +00:00
Chris Lattner
a7306db5f7 Add a nasty hack to fix Alpha/IA64 multiplies by a power of two. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19737 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-22 00:20:42 +00:00
Chris Lattner
9bb86f46e1 Remove unneeded line. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19736 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 23:43:12 +00:00
Chris Lattner
1e7ceaf0a0 test commit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19735 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 23:38:56 +00:00
Chris Lattner
a93ec3ebfb Unary token factor nodes are unneeded. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19727 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 18:01:22 +00:00
Chris Lattner
77e77a6aa0 Refactor libcall code a bit. Initial implementation of expanding int -> FP 
operations for 64-bit integers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19724 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 06:05:23 +00:00
Chris Lattner
e5544f851a Simplify the shift-expansion code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19721 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 20:29:23 +00:00
Chris Lattner
84f6788044 Expand add/sub into ADD_PARTS/SUB_PARTS instead of a non-existant libcall. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19715 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 18:52:28 +00:00
Chris Lattner
17eee18f40 implement add_parts/sub_parts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19714 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 18:50:55 +00:00
Chris Lattner
2c49f27955 Support targets that do not use i8 shift amounts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19707 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 22:31:21 +00:00
Chris Lattner
3d9dffc586 Add support for targets that pass args in registers to calls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19703 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 20:24:35 +00:00
Chris Lattner
1e81b9e511 Fold single use token factor nodes into other token factor nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19701 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 19:10:54 +00:00
Chris Lattner
ec39a45bdb Realize the individual pieces of an expanded copytoreg/store/load are 
independent of each other.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19700 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 18:02:17 +00:00
Chris Lattner
39908e0ce0 Know some identities about tokenfactor nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19699 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 18:01:40 +00:00
Chris Lattner
88218ef706 Know some simple identities. This improves codegen for (1LL << N). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19698 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 17:29:49 +00:00
Chris Lattner
e34b396ab7 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19679 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 04:19:40 +00:00
Chris Lattner
d6e496732b Add a hook to find out how the target handles shift amounts that are out of 
range.  Either they are undefined (the default), they mask the shift amount
to the size of the register (X86, Alpha, etc), or they extend the shift (PPC).

This defaults to undefined, which is conservatively correct.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19677 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 03:36:14 +00:00
Chris Lattner
d5d5682512 Zero is cheaper than sign extend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19675 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 21:57:59 +00:00
Chris Lattner
47e9223e06 Fix some fixmes (promoting bools for select and brcond), fix promotion 
of zero and sign extends.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19671 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:27:06 +00:00
Chris Lattner
4a9b4f1943 Keep track of the retval type as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19670 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:26:36 +00:00
Chris Lattner
ef5cd1d3cf 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19668 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 17:54:55 +00:00
Chris Lattner
82fbfb6984 Teach legalize to promote SetCC results. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19657 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:59:52 +00:00
Chris Lattner
f30b73b1c6 Allow setcc operations to have nonbool types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19656 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:52:03 +00:00
Chris Lattner
6e4e7652d8 Fix the completely broken FP constant folds for setcc's. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19651 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:11:55 +00:00
Chris Lattner
d3948116b8 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19644 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 22:19:26 +00:00
Chris Lattner
a651cf67b7 Don't call SelectionDAG.getRoot() directly, go through a forwarding method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19642 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 19:43:36 +00:00
Chris Lattner
0afa8e348e 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. :-)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19639 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 17:55:19 +00:00
Chris Lattner
068a81e9fc Refactor code into a new method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19635 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 17:15:02 +00:00
Chris Lattner
714b69d047 Shift and setcc types default to the pointer type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19619 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 23:59:48 +00:00
Chris Lattner
8ac532c55e Implement legalize of call nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19617 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 19:46:48 +00:00
Chris Lattner
55ba8fba75 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).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19613 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:29:19 +00:00
Chris Lattner
171453a284 add method stub 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19612 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:28:41 +00:00
Chris Lattner
4b7899343e Don't mash stuff together. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19611 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:28:31 +00:00
Chris Lattner
cba82f9339 Use enums, move virtual dtor out of line. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19610 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 07:28:11 +00:00
Chris Lattner
f8161d83f0 Implement some more missing promotions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19606 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 05:06:12 +00:00
Chris Lattner
9467497ae2 Clarify assertion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19597 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:23:34 +00:00
Chris Lattner
7636512f59 Add assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19596 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:23:22 +00:00
Chris Lattner
c8ea3c4710 Add support for promoted registers being live across blocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19595 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 02:23:07 +00:00
Chris Lattner
cfdfe4ce4a Set up identity transforms. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19584 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:20:18 +00:00
Chris Lattner
71c42a0190 Move some information into the TargetLowering object. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19583 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:11:45 +00:00
Chris Lattner
98e5c0e5e4 Use the new TLI method to get this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19582 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:11:19 +00:00
Chris Lattner
bb97d81cc8 Move some information out of LegalizeDAG into the generic Target interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19581 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 01:10:58 +00:00
Chris Lattner
1713e73b8a legalize a bunch of operations that I missed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19580 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:38:00 +00:00
Chris Lattner
fb849800ea Add support for targets that require promotions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19579 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:37:38 +00:00
Chris Lattner
ff3e50cc39 Fix some serious bugs in promotion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19578 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:17:42 +00:00
Chris Lattner
950aa3ca2c Eliminate unneeded extensions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19577 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-16 00:17:20 +00:00
Chris Lattner
8b6fa22e72 Implement promotion of a whole bunch more operators. I think that this is 
basically everything.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19576 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 22:16:26 +00:00
Chris Lattner
8a389bb376 Print extra type for nodes with extra type info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19575 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 21:11:37 +00:00
Chris Lattner
45b8caf1c5 Add support for legalizing FP_ROUND_INREG, SIGN_EXTEND_INREG, and 
ZERO_EXTEND_INREG for targets that don't support them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19573 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 07:15:18 +00:00
Chris Lattner
4ea6924444 Common code factored out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19572 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 07:14:32 +00:00
Chris Lattner
0f69b29108 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19569 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 06:18:18 +00:00
Chris Lattner
859157daee Add new SIGN_EXTEND_INREG, ZERO_EXTEND_INREG, and FP_ROUND_INREG operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19568 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 06:17:04 +00:00
Chris Lattner
03c8546ec5 Add intitial support for promoting some operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19565 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-15 05:21:40 +00:00
Chris Lattner
69a52155d2 Adjust to CopyFromReg changes, implement deletion of truncating/extending 
stores/loads.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19562 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 22:38:01 +00:00
Chris Lattner
2ee743ff9b Start implementing truncating stores and extending loads. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19559 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-14 22:08:15 +00:00
Chris Lattner
18c2f13e0f Add new ImplicitDef node, rename CopyRegSDNode class to RegSDNode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19535 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 20:50:02 +00:00
Chris Lattner
5a6c6d98d5 Don't forget the existing root. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19531 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 19:53:14 +00:00
Chris Lattner
ddb870b065 Codegen independent ops as being independent. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19528 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 17:59:43 +00:00
Chris Lattner
a385e9b20f Legalize new node, add assertion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19527 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 17:59:25 +00:00
Chris Lattner
282c5cae89 Print new node. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19526 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-13 17:59:10 +00:00
Chris Lattner
2f0ca79a75 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19519 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:51:15 +00:00
Chris Lattner
5c88456227 New method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19517 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:37:47 +00:00
Chris Lattner
2dad454af6 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19515 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 18:19:52 +00:00
Reid Spencer
3bfbf4ea99 Shut up warnings with GCC 3.4.3 about uninitialized variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19512 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 14:53:45 +00:00
Chris Lattner
7944d9d995 Add an option to view the selection dags as they are generated. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19498 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-12 03:41:21 +00:00
Chris Lattner
c871e1d56f Print the value types in the nodes of the graph 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19485 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 22:21:04 +00:00
Chris Lattner
f1fdacae8c add an assertion, avoid creating copyfromreg/copytoreg pairs that are the 
same for PHI nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19484 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 22:03:46 +00:00
Chris Lattner
7abf820182 Clear the whole array, always. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19482 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 20:25:26 +00:00
Chris Lattner
64da653ba9 Squelch optimized warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19475 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 17:46:49 +00:00
Chris Lattner
e1bd822ddb Teach legalize to lower MEMSET/MEMCPY/MEMMOVE operations if the target 
does not support them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19465 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 05:57:22 +00:00
Chris Lattner
4c633e82f6 Print new operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19464 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 05:57:01 +00:00
Chris Lattner
7041ee35ad Turn memset/memcpy/memmove into the corresponding operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19463 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 05:56:49 +00:00
Chris Lattner
a8d9cc8705 shift X, 0 -> X 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19453 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 04:25:13 +00:00
Chris Lattner
e9c44cdf18 Print SelectionDAGs bottom up, include extra info in the node labels 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19447 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-11 00:34:33 +00:00
Chris Lattner
fc08d9c789 Add a marker for the graph root. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19445 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:52:04 +00:00
Chris Lattner
e0646b86e3 Put the operation name in each node, put the function name on the graph. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19444 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:26:00 +00:00
Chris Lattner
d75f19fa42 Split out SDNode::getOperationName into its own method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19443 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:25:25 +00:00
Chris Lattner
66328480bb Implement initial selectiondag printing support. This gets us a nice 
graph with no labels! :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19441 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 23:08:40 +00:00
Chris Lattner
6b7598b995 Lower to the correct functions. This fixes FreeBench/fourinarow 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19436 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 21:02:37 +00:00
Chris Lattner
68dc310942 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19430 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 02:03:02 +00:00
Chris Lattner
87ae6ae41c Fix incorrect constant folds, fixing Stepanov after the SHR patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19429 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 01:16:03 +00:00
Chris Lattner
8136d1f8cb 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19427 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-10 00:07:15 +00:00
Chris Lattner
5cdcc58d51 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19425 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:52:51 +00:00
Jeff Cohen
fd161e964a Fix VC++ compilation error 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19423 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:41:56 +00:00
Chris Lattner
ea946cdb1b Print the DAG out more like a DAG in nested format. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19422 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:38:33 +00:00
Chris Lattner
49d24716a4 Print out nodes sorted by their address to make it easier to find them in a list. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19421 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:26:36 +00:00
Chris Lattner
abd2182875 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!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19419 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 20:09:57 +00:00
Chris Lattner
38d6be5d49 Fix a bug legalizing call instructions (make sure to remember all result 
values), and eliminate some switch statements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19417 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 19:43:23 +00:00
Chris Lattner
513e52ec4e 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++


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19416 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 19:07:54 +00:00
Chris Lattner
fa404e8a76 Teach legalize to deal with DYNAMIC_STACKALLOC (aka a dynamic llvm alloca) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19415 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 19:03:49 +00:00
Chris Lattner
ee749d7488 Handle static alloca arguments to PHI nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19409 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 01:16:24 +00:00
Chris Lattner
39ae362279 Use new interfaces to correctly lower varargs and return/frame address intrinsics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19407 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-09 00:00:49 +00:00
Chris Lattner
64e14b1679 Add support for llvm.setjmp and longjmp. Only 3 SingleSource/UnitTests fail now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19404 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 22:48:57 +00:00
Chris Lattner
e3304a3d24 Tighten up assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19397 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 20:35:13 +00:00
Chris Lattner
f26bc8ef48 Silence VS warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19384 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 19:52:31 +00:00
Chris Lattner
4e6c746899 Implement handling of most long operators through libcalls. 
Fix a bug legalizing "ret (Val,Val)"


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19375 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 19:27:05 +00:00
Chris Lattner
cf5734dddd Adjust to changes in LowerCAllTo interfaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19374 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 19:26:18 +00:00
Chris Lattner
ae0aacb833 Add support for FP->INT conversions and back. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19369 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 08:08:56 +00:00
Chris Lattner
5d2c6c784b Implement the 'store FPIMM, Ptr' -> 'store INTIMM, Ptr' optimization for 
all targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19366 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 06:25:56 +00:00
Chris Lattner
623f70dd4c 1ULL << 64 is undefined, don't do it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19365 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-08 06:24:30 +00:00
Chris Lattner
7c68ec6b70 Fix a pointer invalidation problem. This fixes Generic/badarg6.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19361 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 23:32:00 +00:00
Chris Lattner
5351e9b172 Fold conditional branches on constants away. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19360 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 22:49:57 +00:00
Chris Lattner
4287d5e355 Fix a thinko in the reassociation code, fixing Generic/badlive.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19359 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 22:44:09 +00:00
Chris Lattner
b00a6425de Add support for truncating integer casts from long. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19358 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 22:37:48 +00:00
Chris Lattner
8afc48e44a Fix a bug in load expansion legalization and ret legalization. This fixes 
CodeGen/Generic/select.ll:castconst.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19357 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 22:28:47 +00:00
Chris Lattner
c7af17923e Legalize unconditional branches too 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19356 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 22:12:08 +00:00
Chris Lattner
7cc4777a26 Implement support for long GEP indices on 32-bit archs and support for 
int GEP indices on 64-bit archs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19354 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:56:57 +00:00
Chris Lattner
fd8c39b773 Simplify: truncate ({zero|sign}_extend (X)) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19353 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:56:24 +00:00
Chris Lattner
03c0cf822e implement legalization of a bunch more operators. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19352 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:45:56 +00:00
Chris Lattner
fad71ebe1e Fix another bug legalizing calls! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19350 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:35:32 +00:00
Chris Lattner
f44fd88e9c Fix handling of dead PHI nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19349 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:34:19 +00:00
Chris Lattner
ebda942efc Fix a bug legalizing calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19348 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:34:13 +00:00
Chris Lattner
62fd269c14 After legalizing a DAG, delete dead nodes to save space. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19346 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:09:37 +00:00
Chris Lattner
0e12e6e041 Implement RemoveDeadNodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19345 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 21:09:16 +00:00
Chris Lattner
c18ae4cb6a Teach legalize how to handle condbranches 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19339 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 08:19:42 +00:00
Chris Lattner
1c08c714bb Initial implementation of the SelectionDAGISel class. This contains most 
of the code for lowering from LLVM code to a SelectionDAG.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19331 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 07:47:53 +00:00
Chris Lattner
b75c12de67 This file is obsolete 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19330 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 07:47:23 +00:00
Chris Lattner
3e928bbd61 Initial implementation of the DAG legalization. This still has a long way 
to go, but it does work for some non-trivial cases now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19329 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 07:47:09 +00:00
Chris Lattner
c3aae25116 Complete rewrite of the SelectionDAG class. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19327 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 07:46:32 +00:00
Chris Lattner
310968cbbb First draft of new Target interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19324 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-07 07:44:53 +00:00
Reid Spencer
6cb21d443e Change Library Names Not To Conflict With Others When Installed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17286 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-10-27 23:18:45 +00:00
Reid Spencer
cac731ecbe We won't use automake 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17155 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-10-22 03:35:04 +00:00
Reid Spencer
86d341b204 Initial automake generated Makefile template 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17136 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-10-18 23:55:41 +00:00
Reid Spencer
d96cb6eaa0 Update to reflect changes in Makefile rules. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16950 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-10-13 11:46:52 +00:00
Reid Spencer
9f41a5fe85 Initial version of automake Makefile.am file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16885 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-10-10 20:43:57 +00:00
Misha Brukman
6a134dedf6 Hyphenate target-(in)dependent for more tasty grammar goodness (tm) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16854 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-10-08 19:43:31 +00:00
Reid Spencer
954da37bb4 Add #include <iostream> since Value.h does not #include it any more. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14622 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-04 12:19:56 +00:00
Chris Lattner
f70c22b019 Rename Type::PrimitiveID to TypeId and ::getPrimitiveID() to ::getTypeID() 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14201 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-17 18:19:28 +00:00
Chris Lattner
e25738cab6 Finegrainify namespacification 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13948 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-02 04:28:06 +00:00
Chris Lattner
fd0f7b1131 Fix a trivial but blatant bug 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13947 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-02 03:57:43 +00:00
Brian Gaeke
d0fde30ce8 Put all LLVM code into the llvm namespace, as per bug 109. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9903 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-11-11 22:41:34 +00:00
John Criswell
e488e9360b Added LLVM copyright notice to Makefiles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9312 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-20 22:26:57 +00:00
John Criswell
b576c94c15 Added LLVM project notice to the top of every C++ source file. 
Header files will be on the way.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9298 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-10-20 19:43:21 +00:00
Chris Lattner
79ba7c1aee rename selection directory and library to SelectionDAG 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7877 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-15 04:55:22 +00:00
Chris Lattner
7dc97ff180 Add a bunch of new node types, etc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7875 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-15 04:53:16 +00:00
Chris Lattner
78ec311bd5 Initial checkin of SelectionDAG implementation. This is still rough and 
unfinished


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7717 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-08-11 14:57:33 +00:00