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1543 Commits

Author SHA1 Message Date
Chris Lattner
13546cb380 Add a bunch more instructions 
llvm-svn: 12737
 2004-04-07 04:06:46 +00:00
Chris Lattner
a58da750eb Merge my changes with brians 
llvm-svn: 12736
 2004-04-07 04:05:49 +00:00
Brian Gaeke
ece16e53c4 Add in some things I forgot, which Chris helpfully reminded me of... 
llvm-svn: 12735
 2004-04-07 04:05:12 +00:00
Brian Gaeke
4b90f62e6d Add support for the "Y" register, used by MUL & DIV. 
llvm-svn: 12734
 2004-04-07 04:01:11 +00:00
Brian Gaeke
8651efab54 Add UDIV, SDIV, and a few variants of WR. 
llvm-svn: 12733
 2004-04-07 04:01:00 +00:00
Brian Gaeke
0d35bd3ca9 Preliminary support for getting 64-bit integer constants into registers. 
Preliminary support for division. It's gross because you have to initialize
the "Y" register, which is the top 32 bits of the thing you're dividing.

llvm-svn: 12732
 2004-04-07 04:00:49 +00:00
Brian Gaeke
2aa3485241 Prune unnecessary #includes 
llvm-svn: 12731
 2004-04-06 23:25:07 +00:00
Brian Gaeke
c59ef116a2 Simple delay slot filler pass. 
llvm-svn: 12730
 2004-04-06 23:21:45 +00:00
Brian Gaeke
38ad8d1aea Add references to delay slot filler pass. 
Fill in addPassesToJITCompile method.

llvm-svn: 12729
 2004-04-06 23:21:24 +00:00
Brian Gaeke
0ee6eb1c1a First attempt at handling frame index elimination. 
llvm-svn: 12728
 2004-04-06 22:10:22 +00:00
Brian Gaeke
b7f86edbf3 First attempt at special-casing printing of [%reg + offset] for 
ld/st instructions - doesn't seem to work yet, but I think it's
just a typo or something somewhere.

llvm-svn: 12727
 2004-04-06 22:10:11 +00:00
Brian Gaeke
74d26802a4 Delete reference to "the Mach-O Runtime ABI". 
llvm-svn: 12726
 2004-04-06 22:09:59 +00:00
Brian Gaeke
da22005285 Deal with call return values. 
Don't put NOPs in delay slots at all. We'll have a fix-up pass later.

llvm-svn: 12725
 2004-04-06 22:09:23 +00:00
Jakub Staszak
fc0d9bb7e9 file based off InstSelectSimple.cpp, slowly being replaced by generated code from the really simple X86 instruction selector tablegen backend 
llvm-svn: 12715
 2004-04-06 19:35:17 +00:00
Jakub Staszak
06dc0add14 Tablgen files for really simple instruction selector 
llvm-svn: 12714
 2004-04-06 19:34:00 +00:00
Chris Lattner
3808778190 Fix PR313: [x86] JIT miscompiles unsigned short to floating point 
llvm-svn: 12711
 2004-04-06 19:29:36 +00:00
Chris Lattner
993d6106c7 Fix incorrect encoding of some ADC and SBB instuctions 
llvm-svn: 12710
 2004-04-06 19:20:32 +00:00
Chris Lattner
54e93df11a 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.

llvm-svn: 12702
 2004-04-06 17:34:50 +00:00
Chris Lattner
2d9b28ac0b 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

llvm-svn: 12696
 2004-04-06 16:02:27 +00:00
Chris Lattner
fd7b570dff 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

llvm-svn: 12693
 2004-04-06 04:55:43 +00:00
Chris Lattner
6038e5a4a1 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

llvm-svn: 12692
 2004-04-06 04:29:36 +00:00
Chris Lattner
dd0d31ca2a 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

llvm-svn: 12688
 2004-04-06 03:42:38 +00:00
Chris Lattner
7eb61104dc Bugfixes: inc/dec don't set the carry flag! 
llvm-svn: 12687
 2004-04-06 03:36:57 +00:00
Chris Lattner
8cdbb1fe84 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

llvm-svn: 12686
 2004-04-06 03:23:00 +00:00
Chris Lattner
2738d6d4a4 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

llvm-svn: 12685
 2004-04-06 03:15:53 +00:00
Chris Lattner
bdbedf9523 Fix typeo 
llvm-svn: 12684
 2004-04-06 02:13:25 +00:00
Chris Lattner
606639ed1a Add support for simple immediate handling to long instruction selection. 
This allows us to handle code like 'add long %X, 123456789012' more efficiently.

llvm-svn: 12683
 2004-04-06 02:11:49 +00:00
Chris Lattner
e84f12a165 The sbb instructions really ARE sbb's, not adc's 
llvm-svn: 12682
 2004-04-06 02:02:11 +00:00
Chris Lattner
0808f5daa5 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

llvm-svn: 12681
 2004-04-06 01:48:06 +00:00
Chris Lattner
56dcdcf638 Minor tweak to avoid an extra reg-reg copy that the register allocator has to eliminate 
llvm-svn: 12680
 2004-04-06 01:25:33 +00:00
Chris Lattner
42cf317fca 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
}

llvm-svn: 12679
 2004-04-06 01:21:00 +00:00
Chris Lattner
9236135e8f 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.

llvm-svn: 12653
 2004-04-05 01:30:19 +00:00
Chris Lattner
c69fd63e82 In the perhaps not-to-distant future, we might support gep instructions that 
have non-long indices for sequential types.  In order to avoid trying to figure
out how the v9 backend works, we'll just hack it in the preselection pass.

llvm-svn: 12647
 2004-04-04 20:44:05 +00:00
Brian Gaeke
dec12ea71d Add support for many of the MRegisterInfo callbacks. 
Eliminating call-frame pseudo instrs and frame indices are still stubs.
Flesh out the emitPrologue method based on better ABI knowledge.

llvm-svn: 12632
 2004-04-02 20:53:37 +00:00
Brian Gaeke
b2d36cced3 Add load, store, and NOP instructions. 
Fix up comments.

llvm-svn: 12631
 2004-04-02 20:53:37 +00:00
Brian Gaeke
741518f9f6 Add support for printing pc-relative displacements of functions (as used in 
the CALL instruction).

llvm-svn: 12630
 2004-04-02 20:53:35 +00:00
Brian Gaeke
10ab592570 Add support for call instructions (0-ary only for now). 
llvm-svn: 12629
 2004-04-02 20:53:33 +00:00
Alkis Evlogimenos
27ed33c309 Clean up code a bit. 
llvm-svn: 12615
 2004-04-02 18:11:32 +00:00
Brian Gaeke
73afcebba1 Only strip symbols if emitting bytecode to the assembly file. 
Move lowerselect pass to come after preselection.  Move machine
code construction and stack slots pass to come right before instruction
selection. This is to help fix perlbmk.

Update comments.

Make the sequence of passes in addPassesToJITCompile look more like
the sequence of passes in addPassesToEmitAssembly, including support
for -print-machineinstrs.

llvm-svn: 12614
 2004-04-02 17:52:40 +00:00
Brian Gaeke
3fb4f87195 Add support for constant select expressions. Clarify the assertion failure msg. 
llvm-svn: 12613
 2004-04-02 17:52:29 +00:00
Alkis Evlogimenos
85e007a6dc Fix type in comments 
llvm-svn: 12611
 2004-04-02 16:02:50 +00:00
Alkis Evlogimenos
84ee10f9e1 Fix type in instruction builder instantiation 
llvm-svn: 12610
 2004-04-02 15:51:03 +00:00
Alkis Evlogimenos
20b074682c Add more ADC and SBB variants 
llvm-svn: 12607
 2004-04-02 07:11:10 +00:00
Chris Lattner
ef90bac3e3 Add support for select constant expressions to the CBE, fixing SIOD 
llvm-svn: 12589
 2004-04-01 05:28:26 +00:00
Chris Lattner
b6e4e5a95e Simplify code by using the more powerful BuildMI forms. 
Implement a small optimization.  In test/Regression/CodeGen/X86/select.ll,
we now generate this for foldSel3:

foldSel3:
        mov %AL, BYTE PTR [%ESP + 4]
        fld DWORD PTR [%ESP + 8]
        fld DWORD PTR [%ESP + 12]
        mov %EAX, DWORD PTR [%ESP + 16]
        mov %ECX, DWORD PTR [%ESP + 20]
        cmp %EAX, %ECX
        fxch %ST(1)
        fcmovae %ST(0), %ST(1)
***     fstp %ST(1)
        ret

Instead of:

foldSel3:
        mov %AL, BYTE PTR [%ESP + 4]
        fld DWORD PTR [%ESP + 8]
        fld DWORD PTR [%ESP + 12]
        mov %EAX, DWORD PTR [%ESP + 16]
        mov %ECX, DWORD PTR [%ESP + 20]
        cmp %EAX, %ECX
        fxch %ST(1)
        fcmovae %ST(0), %ST(1)
***     fxch %ST(1)
***     fstp %ST(0)
        ret

In practice, this only effects code size: performance should be basically
unaffected.

llvm-svn: 12588
 2004-04-01 04:06:09 +00:00
Chris Lattner
78027ca4ff Wrap at 80 cols 
llvm-svn: 12587
 2004-04-01 04:03:27 +00:00
Chris Lattner
2e0755a058 Generate slightly smaller code, "test R, R" instead of "cmp R, 0" 
llvm-svn: 12579
 2004-03-31 22:22:36 +00:00
Chris Lattner
97e8b80649 The X86 backend no longer needs the select lowering pass. 
llvm-svn: 12578
 2004-03-31 22:03:46 +00:00
Chris Lattner
e5d60adc20 Codegen FP select instructions into X86 conditional moves. Annoyingly enough 
the X86 does not support a full set of fp cmove instructions, so we can't always
fold the condition into the select.  :(  Yuck.

llvm-svn: 12577
 2004-03-31 22:03:35 +00:00
Chris Lattner
d50df93168 Add support for floating point conditional move instructions 
llvm-svn: 12576
 2004-03-31 22:02:36 +00:00
Chris Lattner
4d543b4201 Add support for FP cmoves 
llvm-svn: 12575
 2004-03-31 22:02:21 +00:00
Chris Lattner
e4fa3010db Add FP conditional move instructions, which annoyingly have special properties 
that require the asmwriter to be extended (printing implicit uses before the
explicit operands)

llvm-svn: 12574
 2004-03-31 22:02:13 +00:00
Chris Lattner
bfe4dd0f90 MBB::remove should not modify the iterator passed in 
llvm-svn: 12572
 2004-03-31 21:59:59 +00:00
Brian Gaeke
98c323dedd Factor out getStaticStackSize from InsertPrologCode(), so that I can more 
easily steal it for a separate use in the reoptimizer.

llvm-svn: 12568
 2004-03-31 20:58:37 +00:00
Chris Lattner
f477746a61 Fold comparisons into select instructions, making much better code and 
using our broad selection of movcc instructions.  :)

llvm-svn: 12560
 2004-03-30 22:39:09 +00:00
Chris Lattner
6c1dd729d3 Implement spill code folding for all of the conditional move instructions 
llvm-svn: 12554
 2004-03-30 21:29:47 +00:00
Chris Lattner
ff016bd6fe Add direct support for integer select instructions, though we still don't support 
folding compares into the select yet.

llvm-svn: 12553
 2004-03-30 21:22:00 +00:00
Chris Lattner
57968a98df Fix some serious bugs in the cmov descriptions, which didn't cause a problem because 
we never generated them

Make indentation a bit more consistent

llvm-svn: 12549
 2004-03-30 20:18:02 +00:00
Chris Lattner
95942c021a Fix a fairly major performance problem. If a PHI node had a constant as 
an incoming value from a block, the selector would evaluate the constant
at the TOP of the block instead of at the end of the block.  This made the
live range for the constant span the entire block, increasing register
pressure needlessly.

llvm-svn: 12542
 2004-03-30 19:10:12 +00:00
Chris Lattner
87479998f2 Add the select lowering pass to get initial support for select instructions 
llvm-svn: 12541
 2004-03-30 18:41:59 +00:00
Brian Gaeke
610cfaa7fd Don't warn about a null live range if the Value is a ConstantIntegral. 
Otherwise, if you're in debugging mode, you get warnings for (apparently)
every immediate constant in the function during reg. allocation.

llvm-svn: 12538
 2004-03-29 21:58:41 +00:00
Chris Lattner
4e7ea3671c Fix PR299: [Sparc] Code generator asserts on alloc of zero size type 
llvm-svn: 12504
 2004-03-19 04:21:43 +00:00
Chris Lattner
b8f179cb9b Malloc doesn't kill a load. This patch need not go into 1.2 though. 
llvm-svn: 12500
 2004-03-18 17:01:26 +00:00
Chris Lattner
ef7c1e9f7f Fix a really nasty bug that was breaking ijpeg in LLC mode. We were incorrectly 
folding load instructions into other instructions across free instruction
boundaries.  Perhaps this will also fix the other strange failures?

llvm-svn: 12494
 2004-03-18 06:29:54 +00:00
Brian Gaeke
c1c4cfd741 The .type directive on Solaris uses the # character instead of @. 
llvm-svn: 12454
 2004-03-16 22:52:04 +00:00
Brian Gaeke
f97393aebf Fix bug in zero-extending of shorts. 
llvm-svn: 12453
 2004-03-16 22:45:42 +00:00
Brian Gaeke
26deccbffb Add UMULrr and SMULrr instructions. 
llvm-svn: 12452
 2004-03-16 22:37:13 +00:00
Brian Gaeke
fd02eeae64 Use ! for comment char; it works in both Solaris as and GAS. 
llvm-svn: 12451
 2004-03-16 22:37:12 +00:00
Brian Gaeke
199ba20b20 Make getClass more robust by adding cLong. 
Add handling for Mul instruction.

llvm-svn: 12450
 2004-03-16 22:37:11 +00:00
Alkis Evlogimenos
6ac147a7fb Add LAHF instruction 
llvm-svn: 12424
 2004-03-15 17:20:14 +00:00
Alkis Evlogimenos
2b94b048a9 Another API change to MRegisterInfo::foldMemoryOperand. Instead of a 
MachineBasicBlock::iterator take a MachineInstr*.

llvm-svn: 12392
 2004-03-14 20:14:27 +00:00
Alkis Evlogimenos
ff9482b664 Change MRegisterInfo::foldMemoryOperand to return the folded 
instruction to make the API more flexible.

llvm-svn: 12386
 2004-03-14 07:19:51 +00:00
Chris Lattner
b45245327e It helps if I save the file. :) 
llvm-svn: 12357
 2004-03-13 00:24:52 +00:00
Chris Lattner
f7bc6fd913 Rename the intrinsic enum values for llvm.va_* from Intrinsic::va_* to 
Intrinsic::va*.  This avoid conflicting with macros in the stdlib.h file.

llvm-svn: 12356
 2004-03-13 00:24:00 +00:00
Brian Gaeke
5bc633f691 Make -print-machineinstrs show us the code both before and after reg. alloc. 
llvm-svn: 12344
 2004-03-12 21:19:08 +00:00
Alkis Evlogimenos
da990ad8a4 Add support for a wider range of CMOV instructions. 
llvm-svn: 12336
 2004-03-12 17:59:56 +00:00
Chris Lattner
e536e15ce1 ADd support for select instructions 
llvm-svn: 12316
 2004-03-12 05:52:14 +00:00
Misha Brukman
fe8263c956 Move implementations of functions here, which avoids #including <cstdlib> in the 
header file and all those who #include it.

llvm-svn: 12297
 2004-03-11 23:52:43 +00:00
Brian Gaeke
ede938b425 Get rid of the abort in PhyRegAlloc::finishSavingState(). 
Make an explicit call to it from runOnFunction() if we know we're supposed to
write into the global. This is lame (esp. the const_cast), but it solves
the problem.

llvm-svn: 12291
 2004-03-11 19:46:30 +00:00
Brian Gaeke
e6916ff3b4 Give pass a name 
llvm-svn: 12290
 2004-03-11 19:23:15 +00:00
Misha Brukman
992e44e3c5 Fix compilation on Sparc: assert(0) => abort() 
llvm-svn: 12289
 2004-03-11 19:08:24 +00:00
Brian Gaeke
b3f9f99ff2 In PhyRegAlloc::saveState(), dump Arguments' saved-state, and try to 
make the output more compact.

Divorce state-saving from the doFinalization method; for some reason it's not
getting called when I want it to, at Reoptimizer time. Put the guts in
PhyRegAlloc::finishSavingState(). Put an abort() in it so that I can be really
really sure that it's getting called.

Update comments.

llvm-svn: 12286
 2004-03-11 06:45:52 +00:00
Brian Gaeke
bb3d010689 Remove ghostly directory from the build 
llvm-svn: 12285
 2004-03-11 04:42:41 +00:00
Brian Gaeke
a3ed4044b0 Move all the SaveState options and stuff inton one spot at the top of the file. 
De-constify SaveStateToModule; we have to set both it and SaveRegAllocState
explicitly in the reoptimizer.
Make SaveRegAllocState an 'external location' option.

llvm-svn: 12278
 2004-03-10 22:21:03 +00:00
Brian Gaeke
8af4555830 Only call verifySavedState if SaveRegAllocState is set AND debugging flag is on. 
llvm-svn: 12277
 2004-03-10 22:01:59 +00:00
Alkis Evlogimenos
a13672fd71 Check if printing of implicit uses is required for all types of shift 
instructions.

llvm-svn: 12258
 2004-03-09 06:10:15 +00:00
Brian Gaeke
de0239b2a6 Hmm, who left this sitting around in my tree 
llvm-svn: 12255
 2004-03-09 04:49:13 +00:00
Alkis Evlogimenos
7c0224327e Differentiate between extended precision floats (80-bit) and double precision floats (64-bit) 
llvm-svn: 12254
 2004-03-09 03:37:54 +00:00
Alkis Evlogimenos
f86d2df13d Use newly added API to emit bytes for instructions that gas misassembles 
llvm-svn: 12253
 2004-03-09 03:35:34 +00:00
Alkis Evlogimenos
085957be0b Add emitInstruction() API so that we can get the bytes of a simple instruction 
llvm-svn: 12252
 2004-03-09 03:34:53 +00:00
Alkis Evlogimenos
813daf05c3 Constify things a bit 
llvm-svn: 12251
 2004-03-09 03:30:12 +00:00
Brian Gaeke
57269b0c32 Change PhyRegAlloc::saveStateForValue()'s arg type to deal with 
AllocInfo.Instruction becoming an int.

llvm-svn: 12247
 2004-03-08 23:22:03 +00:00
Brian Gaeke
ed741b87c2 Save argument list alloc state by recording it as the operands of Instruction 
#-1. Other minor changes to deal with AllocInfo.Instruction becoming an int.

llvm-svn: 12246
 2004-03-08 23:22:02 +00:00
Brian Gaeke
b9b20ad428 Make AllocInfo's Instruction an int, so that we can overload it for arguments. 
(Instruction #-1's operands = argument list).

llvm-svn: 12245
 2004-03-08 23:22:01 +00:00
Chris Lattner
a7180252e6 Avoid allocating special registers a bit more robustly 
llvm-svn: 12207
 2004-03-08 03:48:07 +00:00
Chris Lattner
a55628694a Implement folding explicit load instructions into binary operations. For a 
testcase like this:

int %test(int* %P, int %A) {
        %Pv = load int* %P
        %B = add int %A, %Pv
        ret int %B
}

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

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

... saving one instruction, and often a register.  Note that there are a lot
of other instructions that could use this, but they aren't handled.  I'm not
really interested in adding them, but mul/div and all of the FP instructions
could be supported as well if someone wanted to add them.

llvm-svn: 12204
 2004-03-08 01:58:35 +00:00
Chris Lattner
9a9b1c4822 Rearrange and refactor some code. No functionality changes. 
llvm-svn: 12203
 2004-03-08 01:18:36 +00:00
Alkis Evlogimenos
65649a50e9 Add memory operand version of conditional move. 
llvm-svn: 12190
 2004-03-07 03:19:11 +00:00
Brian Gaeke
4bb4ec2388 Support return values of basic integer types. 
Emit RETL instruction to return instead of funny JMPL.
Fix indentation.

llvm-svn: 12186
 2004-03-06 05:32:28 +00:00
Brian Gaeke
855518207c Sort stanzas into Sparc V8 book page number order. 
Add RET, RETL.  Rename SAVE, RESTORE & JMPL for consistency.

llvm-svn: 12185
 2004-03-06 05:32:13 +00:00