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Author SHA1 Message Date
Jakub Staszak
88ac78c4d9 Tablegen backend for really simple instruction selector 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12713 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 19:31:31 +00:00
Jakub Staszak
01b6a6f279 add tablgen backend for really simple instruction selector 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12712 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 19:30:56 +00:00
Chris Lattner
7b92de1e7d Fix PR313: [x86] JIT miscompiles unsigned short to floating point 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12711 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 19:29:36 +00:00
Chris Lattner
43ab3a8f45 Fix incorrect encoding of some ADC and SBB instuctions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12710 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 19:20:32 +00:00
John Criswell
53c94cb622 Added licensing information for treecc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12703 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 17:51:10 +00:00
Chris Lattner
48c937e5c9 Fix a minor bug in previous checking 
Enable folding of long seteq/setne comparisons into branches and select instructions
Implement unfolded long relational comparisons against a constants a bit more efficiently

Folding comparisons changes code that looks like this:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %ECX, %EAX
        or %ECX, %EDX
        sete %CL
        test %CL, %CL
        je .LBB2 # PC rel: F

into code that looks like this:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %ECX, %EAX
        or %ECX, %EDX
        jne .LBB2 # PC rel: F

This speeds up 186.crafty by 6% with llc-ls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12702 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 17:34:50 +00:00
Misha Brukman
b04da8a3c6 Wrap at 80 cols. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12701 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 17:04:30 +00:00
Chris Lattner
27a9b2713b Minor cleanups 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12700 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 16:54:04 +00:00
Chris Lattner
f7010691f8 Document new option 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12699 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 16:46:12 +00:00
Chris Lattner
69e8d282bf Add a new gccld -native-cbe option which causes gccld to generate native code 
for the application with the C backend instead of the native LLVM code generator


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12698 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 16:43:13 +00:00
Chris Lattner
e80e637793 Improve codegen of long == and != comparisons against constants. Before, 
comparing a long against zero got us this:

        sub %ESP, 8
        mov DWORD PTR [%ESP + 4], %ESI
        mov DWORD PTR [%ESP], %EDI
        mov %EAX, DWORD PTR [%ESP + 12]
        mov %EDX, DWORD PTR [%ESP + 16]
        mov %ECX, 0
        mov %ESI, 0
        mov %EDI, %EAX
        xor %EDI, %ECX
        mov %ECX, %EDX
        xor %ECX, %ESI
        or %EDI, %ECX
        sete %CL
        test %CL, %CL
        je .LBB2 # PC rel: F

Now it gets us this:

        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %ECX, %EAX
        or %ECX, %EDX
        sete %CL
        test %CL, %CL
        je .LBB2 # PC rel: F


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12696 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 16:02:27 +00:00
Chris Lattner
1c62355c07 Update docs a bit 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12695 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 15:22:35 +00:00
Chris Lattner
e5109fae71 Remove some options that don't really have anything to do with bugpoint 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12694 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 15:14:10 +00:00
Chris Lattner
6ab06d5d19 Handle various other important cases of multiplying a long constant immediate. For 
example, multiplying X*(1 + (1LL << 32)) now produces:

test:
        mov %ECX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %EAX, %ECX
        add %EDX, %ECX
        ret

[[[Note to Alkis: why isn't linear scan generating this code??  This might be a
 problem with your intervals being too conservative:

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

end note]]]

Whereas GCC produces this:

T:
        sub     %esp, 12
        mov     %edx, DWORD PTR [%esp+16]
        mov     DWORD PTR [%esp+8], %edi
        mov     %ecx, DWORD PTR [%esp+20]
        xor     %edi, %edi
        mov     DWORD PTR [%esp], %ebx
        mov     %ebx, %edi
        mov     %eax, %edx
        mov     DWORD PTR [%esp+4], %esi
        add     %ebx, %edx
        mov     %edi, DWORD PTR [%esp+8]
        lea     %edx, [%ecx+%ebx]
        mov     %esi, DWORD PTR [%esp+4]
        mov     %ebx, DWORD PTR [%esp]
        add     %esp, 12
        ret

I'm not sure example what GCC is smoking here, but it looks like it has just
confused itself with a bunch of stack slots or something.  The intel compiler
is better, but still not good:

T:
        movl      4(%esp), %edx                                 #2.11
        movl      8(%esp), %eax                                 #2.11
        lea       (%eax,%edx), %ecx                             #3.12
        movl      $1, %eax                                      #3.12
        mull      %edx                                          #3.12
        addl      %ecx, %edx                                    #3.12
        ret                                                     #3.12


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12693 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 04:55:43 +00:00
Chris Lattner
028adc422d Efficiently handle a long multiplication by a constant. For this testcase: 
long %test(long %X) {
        %Y = mul long %X, 123
        ret long %Y
}

we used to generate:

test:
        sub %ESP, 12
        mov DWORD PTR [%ESP + 8], %ESI
        mov DWORD PTR [%ESP + 4], %EDI
        mov DWORD PTR [%ESP], %EBX
        mov %ECX, DWORD PTR [%ESP + 16]
        mov %ESI, DWORD PTR [%ESP + 20]
        mov %EDI, 123
        mov %EBX, 0
        mov %EAX, %ECX
        mul %EDI
        imul %ESI, %EDI
        add %ESI, %EDX
        imul %ECX, %EBX
        add %ESI, %ECX
        mov %EDX, %ESI
        mov %EBX, DWORD PTR [%ESP]
        mov %EDI, DWORD PTR [%ESP + 4]
        mov %ESI, DWORD PTR [%ESP + 8]
        add %ESP, 12
        ret

Now we emit:
test:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, DWORD PTR [%ESP + 8]
        mov %EDX, 123
        mul %EDX
        imul %ECX, %ECX, 123
        add %ECX, %EDX
        mov %EDX, %ECX
        ret

Which, incidently, is substantially nicer than what GCC manages:
T:
        sub     %esp, 8
        mov     %eax, 123
        mov     DWORD PTR [%esp], %ebx
        mov     %ebx, DWORD PTR [%esp+16]
        mov     DWORD PTR [%esp+4], %esi
        mov     %esi, DWORD PTR [%esp+12]
        imul    %ecx, %ebx, 123
        mov     %ebx, DWORD PTR [%esp]
        mul     %esi
        mov     %esi, DWORD PTR [%esp+4]
        add     %esp, 8
        lea     %edx, [%ecx+%edx]
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12692 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 04:29:36 +00:00
Misha Brukman
1e07e0c0c9 * Added link to newly written ExtendingLLVM.html document 
* Eliminated extraneous space in the HTML


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12691 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 04:22:43 +00:00
Misha Brukman
b3b28275da Incorporated Chris' comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12690 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 04:17:51 +00:00
Misha Brukman
a3ce42921c Added notes on extending LLVM with new instructions, intrinsics, types, etc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12689 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 03:53:49 +00:00
Chris Lattner
722070e0ba Improve code generation of long shifts by 32. 
On this testcase:

long %test(long %X) {
        %Y = shr long %X, ubyte 32
        ret long %Y
}

instead of:
t:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%ESP + 8]
        sar %EAX, 0
        mov %EDX, 0
        ret


we now emit:
test:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%ESP + 8]
        mov %EDX, 0
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12688 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 03:42:38 +00:00
Chris Lattner
0652167bea Bugfixes: inc/dec don't set the carry flag! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12687 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 03:36:57 +00:00
Chris Lattner
92900a65a3 Improve code for passing constant longs as arguments to function calls. 
For example, on this instruction:

        call void %test(long 1234)

Instead of this:
        mov %EAX, 1234
        mov %ECX, 0
        mov DWORD PTR [%ESP], %EAX
        mov DWORD PTR [%ESP + 4], %ECX
        call test

We now emit this:
        mov DWORD PTR [%ESP], 1234
        mov DWORD PTR [%ESP + 4], 0
        call test


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12686 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 03:23:00 +00:00
Chris Lattner
33f7fa317b Emit more efficient 64-bit operations when the RHS is a constant, and one 
of the words of the constant is zeros.  For example:
  Y = and long X, 1234

now generates:
  Yl = and Xl, 1234
  Yh = 0

instead of:
  Yl = and Xl, 1234
  Yh = and Xh, 0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12685 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 03:15:53 +00:00
Chris Lattner
7ba92306db Fix typeo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12684 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 02:13:25 +00:00
Chris Lattner
ab1d0e0963 Add support for simple immediate handling to long instruction selection. 
This allows us to handle code like 'add long %X, 123456789012' more efficiently.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12683 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 02:11:49 +00:00
Chris Lattner
ee98389808 The sbb instructions really ARE sbb's, not adc's 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12682 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 02:02:11 +00:00
Chris Lattner
edd5e4957a Implement negation of longs efficiently. For this testcase: 
long %test(long %X) {
        %Y = sub long 0, %X
        ret long %Y
}

We used to generate:

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

Now we generate:

test:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        neg %EAX
        adc %EDX, 0
        neg %EDX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12681 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 01:48:06 +00:00
Chris Lattner
502e36c3c9 Minor tweak to avoid an extra reg-reg copy that the register allocator has to eliminate 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12680 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 01:25:33 +00:00
Chris Lattner
29bf0623e5 Two changes: 
* In promote32, if we can just promote a constant value, do so instead of
    promoting a constant dynamically.
  * In visitReturn inst, actually USE the promote32 argument that takes a
    Value*

The end result of this is that we now generate this:

test:
        mov %EAX, 0
        ret

instead of...

test:
        mov %AX, 0
        movzx %EAX, %AX
        ret

for:

ushort %test() {
        ret ushort 0
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12679 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-06 01:21:00 +00:00
Chris Lattner
a57d86b436 Merge the code generator miscompilation code into the optimizer miscompilation 
code.  This "instantly" gives us loop-extractor power to assist with the
debugment of our nasty codegen issues.  :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12678 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 22:58:16 +00:00
Chris Lattner
11b8cd197a Make a method public 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12677 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 22:01:48 +00:00
Chris Lattner
9ae427a14c Minor cleanups, remove some old debug code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12676 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 21:37:55 +00:00
Chris Lattner
b15825b0a2 Refactor and genericize code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12675 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 21:37:38 +00:00
Chris Lattner
8505c867b1 lli no longer takes the -quiet option! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12674 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 20:28:41 +00:00
Chris Lattner
6e40e1d15c Do not mangle intrinsics in any way! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12673 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 20:17:53 +00:00
Chris Lattner
30878f42c2 Make full use of the Mangler interface to simplify code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12671 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 19:31:02 +00:00
Chris Lattner
ea9e005ce6 Sparc don't got not "sqrtl", bum bum bum 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12670 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 19:05:15 +00:00
Misha Brukman
bb2aff1e18 Kill warnings during an optimized compile where assert() disappears. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12669 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 19:00:46 +00:00
Chris Lattner
ddd947f21a Fix PR312 and IndVarsSimplify/2004-04-05-InvokeCastCrash.llx 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12668 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 18:46:55 +00:00
Chris Lattner
1b151b4a3b New testcase for PR312 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12667 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 18:46:33 +00:00
Chris Lattner
548f47efb0 Fix a bug in yesterdays checkins which broke siod. siod is a great testcase! :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12659 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 16:02:41 +00:00
Chris Lattner
15a76c0b35 Fix InstCombine/2004-04-04-InstCombineReplaceAllUsesWith.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12658 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 02:10:19 +00:00
Chris Lattner
ec3f8cd551 New testcase that crashes the instcombine pass. Dominance properties have 
no meaning if the code is not reachable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12657 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 02:01:32 +00:00
Chris Lattner
ce8492def2 PR82 is finally fixed! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12656 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 01:43:08 +00:00
Chris Lattner
af48fa8259 Minor change 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12655 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 01:31:50 +00:00
Chris Lattner
f74d5c7d1d Update getelementptr instruction description 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12654 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 01:30:49 +00:00
Chris Lattner
28977af72a Support getelementptr instructions which use uint's to index into structure 
types and can have arbitrary 32- and 64-bit integer types indexing into
sequential types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12653 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 01:30:19 +00:00
Chris Lattner
830b6f9868 Support getelementptr instructions which use uint's to index into structure 
types and can have arbitrary 32- and 64-bit integer types indexing into
sequential types.

Auto-upgrade .ll files that use ubytes to index into structures to use uint's.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12652 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 01:30:04 +00:00
Chris Lattner
5fa428fda9 Implement support for a new LLVM 1.3 bytecode format, which uses uint's 
to index into structure types and allows arbitrary 32- and 64-bit integer
types to index into sequential types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12651 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 01:27:26 +00:00
Chris Lattner
68056127bb Be more restrictive with the index types we allow for sequential types 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12650 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 01:25:21 +00:00
Chris Lattner
89c6048000 PR305 is now fixed 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12649 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-04-05 00:40:55 +00:00