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1283 Commits

Author SHA1 Message Date
Nate Begeman
34f342e36f Remove some dead code now that the dag combiner exists. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23754 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-15 22:08:02 +00:00
Nate Begeman
14e2cf62f4 Properly split f32 and f64 into separate register classes for scalar sse fp 
fixing a bunch of nasty hackery


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23735 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-14 22:06:00 +00:00
Chris Lattner
3cf8760dc5 silence some warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23594 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-02 16:29:36 +00:00
Chris Lattner
56bcae0de9 simplify this code using the new regclass info passed in 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23557 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 17:12:38 +00:00
Chris Lattner
97d5e6461a Pass extra regclasses into spilling code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23537 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-30 01:29:42 +00:00
Chris Lattner
3e2bafd640 Add FP versions of the binary operators, keeping the int and fp worlds seperate. 
Though I have done extensive testing, it is possible that this will break
things in configs I can't test.  Please let me know if this causes a problem
and I'll fix it ASAP.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23505 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-28 22:29:17 +00:00
Chris Lattner
a92aab74dd Implement the isLoadFromStackSlot interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23387 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-19 05:23:44 +00:00
Chris Lattner
43ef1318c6 give all operands names 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23356 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 21:10:24 +00:00
Chris Lattner
3452d23c34 fix a major regression from my patch this afternoon 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23347 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-14 06:06:45 +00:00
Chris Lattner
82da52299c This code is no longer needed, it is moved to the target-indep code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23332 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-13 19:31:44 +00:00
Chris Lattner
fb8b8a75ff Handle any_extend like zext 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23202 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-02 00:16:09 +00:00
Jim Laskey
b1e1180ca0 1. Use SubtargetFeatures in llc/lli. 
2. Propagate feature "string" to all targets.

3. Implement use of SubtargetFeatures in PowerPCTargetSubtarget.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23192 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-01 21:38:21 +00:00
Reid Spencer
dd22dc85ea Adjust to member variable name change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23119 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-27 19:09:48 +00:00
Chris Lattner
143b675393 Fix a bug in my previous checkin 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23082 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 17:18:44 +00:00
Chris Lattner
5839bf2b3b Change ConstantPoolSDNode to actually hold the Constant itself instead of 
putting it into the constant pool.  This allows the isel machinery to
create constants that it will end up deciding are not needed, without them
ending up in the resultant function constant pool.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23081 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-26 17:15:30 +00:00
Chris Lattner
7cad4f2089 Fix a warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23031 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-25 00:05:15 +00:00
Chris Lattner
d177579860 Adjust to new livevars interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22991 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-23 23:41:14 +00:00
Chris Lattner
76eb08bcda Simplify this code by using LiveVariables::KillsRegister 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22988 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-23 22:49:55 +00:00
Chris Lattner
ecbce617ca Split RegisterClass 'Methods' into MethodProtos and MethodBodies 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22929 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 19:13:20 +00:00
Chris Lattner
03ba7b9f25 Put register classes into namespaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22925 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:51:57 +00:00
Chris Lattner
2505d6b727 The simple isel being gone makes this dead! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22914 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 18:32:03 +00:00
Chris Lattner
9d9dc816d0 add a few missing cases 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22891 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:41:29 +00:00
Chris Lattner
b822abade7 Give ADJCALLSTACKDOWN/UP the correct operands. 
Give a whole bunch of other stuff variable operands, particularly FP.  The
FP stackifier is playing fast and loose with operands here, so we have to
mark them all as variable.  This will have to be fixed before we can dag->dag
the X86 backend.  The solution is for the pre-stackifier and post-stackifier
instructions to all be disjoint.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22890 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:38:22 +00:00
Chris Lattner
679c408768 The variable SAR's only take one operand too 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22888 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:31:37 +00:00
Chris Lattner
fd444b2a69 Stop adding bogus operands to variable shifts on X86. These instructions 
only take one operand.  The other comes implicitly in through CL.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22887 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-19 00:16:17 +00:00
Nate Begeman
73bfa71524 Remove the X86 and PowerPC Simple instruction selectors; their time has 
passed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22886 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-18 23:53:15 +00:00
Chris Lattner
707ebc5dd6 update the backends to work with the new CopyFromReg/CopyToReg/ImplicitDef nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22807 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-16 21:56:37 +00:00
Nate Begeman
7cbd525ba8 Implement BR_CC and BRTWOWAY_CC. This allows the removal of a rather nasty 
fixme from the PowerPC backend.  Emit slightly better code for legalizing
select_cc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22805 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-16 19:49:35 +00:00
Nate Begeman
889f2c1acf Fix last night's X86 regressions by putting code for SSE in the if(SSE) 
block.  nur.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22788 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-14 18:37:02 +00:00
Nate Begeman
875f360e22 Fix FP_TO_UINT with Scalar SSE2 now that the legalizer can handle it. We 
now generate the relatively good code sequences:
unsigned short foo(float a) { return a; }
_foo:
        movss 4(%esp), %xmm0
        cvttss2si %xmm0, %eax
        movzwl %ax, %eax
        ret

and
unsigned bar(float a) { return a; }
_bar:
        movss .CPI_bar_0, %xmm0
        movss 4(%esp), %xmm1
        movapd %xmm1, %xmm2
        subss %xmm0, %xmm2
        cvttss2si %xmm2, %eax
        xorl $-2147483648, %eax
        cvttss2si %xmm1, %ecx
        ucomiss %xmm0, %xmm1
        cmovb %ecx, %eax
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22786 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-14 04:36:51 +00:00
Chris Lattner
88ac32ca26 Update the targets to the new SETCC/CondCodeSDNode interfaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22729 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-09 20:21:10 +00:00
Chris Lattner
8c4a8735ec adjust to change in getSubtarget() api 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22687 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-05 21:54:27 +00:00
Nate Begeman
8c00f8cdc7 Add Subtarget support to PowerPC. Next up, using it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22644 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-04 07:12:09 +00:00
Nate Begeman
1c73c7be9d Scalar SSE: load +0.0 -> xorps/xorpd 
Scalar SSE: a < b ? c : 0.0 -> cmpss, andps
Scalar SSE: float -> i16 needs to be promoted


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22637 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 23:26:28 +00:00
Chris Lattner
0561b3ff9f Update to use the new MathExtras.h support for log2 computation. 
Patch contributed by Jim Laskey!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22594 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 19:26:06 +00:00
Jeff Cohen
d29b6aa608 Keep tabs and trailing spaces out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22565 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 18:33:25 +00:00
Chris Lattner
a88da08c6e fix a typeo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22561 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 00:43:00 +00:00
Chris Lattner
a35e1dfd12 Change the fp to integer code to not perform 2-byte stores followed by 
1 byte loads and other operations.  This is bad for store-forwarding on
common CPUs.  We now do this:

fnstcw WORD PTR [%ESP]
mov %AX, WORD PTR [%ESP]

instead of:

fnstcw WORD PTR [%ESP]
mov %AL, BYTE PTR [%ESP + 1]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22559 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 00:17:52 +00:00
Chris Lattner
01546c5d50 Use a custom expander for all FP to int conversions, as the X86 only has 
FP-to-int-in-memory: this exposes the load from the stored slot to the
selection dag, allowing it to be folded into other operaions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22556 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 00:05:54 +00:00
Andrew Lenharth
422f3d58a8 turn off GOT on archs that didn't use it (not that it appeard to harm them much with it on) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22553 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-29 23:32:02 +00:00
Chris Lattner
5d06b8caae Implement a FIXME: move a bunch of cruft for handling FP_TO_*INT operations 
that the X86 does not support to the legalizer.  This allows it to be better
optimized, etc, and will help with SSE support.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22551 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-29 01:00:29 +00:00
Chris Lattner
f7443dace5 Don't forget to diddle with the control word when performing an FISTP64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22550 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-29 00:54:34 +00:00
Chris Lattner
745d538119 Use a custom expander to compile this: 
long %test4(double %X) {
        %tmp.1 = cast double %X to long         ; <long> [#uses=1]
        ret long %tmp.1
}

to this:

_test4:
        sub %ESP, 12
        fld QWORD PTR [%ESP + 16]
        fistp QWORD PTR [%ESP]
        mov %EDX, DWORD PTR [%ESP + 4]
        mov %EAX, DWORD PTR [%ESP]
        add %ESP, 12
        ret

instead of this:

_test4:
        sub %ESP, 28
        fld QWORD PTR [%ESP + 32]
        fstp QWORD PTR [%ESP]
        call ___fixdfdi
        add %ESP, 28
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22549 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-29 00:40:01 +00:00
Jeff Cohen
00b16889ab Eliminate all remaining tabs and trailing spaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22523 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-27 06:12:32 +00:00
Jeff Cohen
9eb59ec548 Eliminate tabs and trailing spaces. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22520 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-27 05:53:44 +00:00
Andrew Lenharth
908bc862d5 update interface 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22498 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-22 20:49:37 +00:00
Reid Spencer
a0f5bf306c For: memory operations -> stores 
This is the first incremental patch to implement this feature. It adds no
functionality to LLVM but setup up the information needed from targets in
order to implement the optimization correctly. Each target needs to specify
the maximum number of store operations for conversion of the llvm.memset,
llvm.memcpy, and llvm.memmove intrinsics into a sequence of store operations.
The limit needs to be chosen at the threshold of performance for such an
optimization (generally smallish). The target also needs to specify whether
the target can support unaligned stores for multi-byte store operations.
This helps ensure the optimization doesn't generate code that will trap on
an alignment errors.
More patches to follow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22468 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-19 04:52:44 +00:00
Nate Begeman
5a8441ea3f Teach the legalizer how to promote SINT_TO_FP to a wider SINT_TO_FP that 
the target natively supports.  This eliminates some special-case code from
the x86 backend and generates better code as well.

For an i8 to f64 conversion, before & after:

_x87 before:
        subl $2, %esp
        movb 6(%esp), %al
        movsbw %al, %ax
        movw %ax, (%esp)
        filds (%esp)
        addl $2, %esp
        ret

_x87 after:
        subl $2, %esp
        movsbw 6(%esp), %ax
        movw %ax, (%esp)
        filds (%esp)
        addl $2, %esp
        ret

_sse before:
        subl $12, %esp
        movb 16(%esp), %al
        movsbl %al, %eax
        cvtsi2sd %eax, %xmm0
        addl $12, %esp
        ret

_sse after:
        subl $12, %esp
        movsbl 16(%esp), %eax
        cvtsi2sd %eax, %xmm0
        addl $12, %esp
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22452 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-16 02:02:34 +00:00
Nate Begeman
11cefd926a Teach the register allocator that movaps is also a move instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22451 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-16 02:00:20 +00:00
Nate Begeman
9035b99abf A couple more darwinisms 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22450 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-16 01:59:47 +00:00
Chris Lattner
a28381cac2 Remove all knowledge of UINT_TO_FP from the X86 backend, relying on the 
legalizer to eliminate them.  With this comes the expected code quality
improvements, such as, for this:

double foo(unsigned short X) { return X; }

we now generate this:

_foo:
        subl $4, %esp
        movzwl 8(%esp), %eax
        movl %eax, (%esp)
        fildl (%esp)
        addl $4, %esp
        ret

instead of this:

_foo:
        subl $4, %esp
        movw 8(%esp), %ax
        movzwl %ax, %eax   ;; Load not folded into this.
        movl %eax, (%esp)
        fildl (%esp)
        addl $4, %esp
        ret

-Chris


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22449 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-16 00:28:20 +00:00
Nate Begeman
16b04f3d5e Get closer to fully working scalar FP in SSE regs. This gets singlesource 
working, and Olden/power.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22441 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-15 00:38:55 +00:00
Nate Begeman
6c7cb29038 Add support for printing the sse scalar comparison instruction mnemonics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22440 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-14 22:52:25 +00:00
Nate Begeman
d3a490a08e Check in the last of the darwin-specific code necessary to get shootout 
working before modifying the asm printer to use the subtarget info.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22408 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-12 18:34:58 +00:00
Nate Begeman
0e219eb9b8 Clean up the TargetSubtarget class a bit, removing an unnecessary argument 
to the constructor.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22392 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-12 02:41:19 +00:00
Chris Lattner
b151acadc8 Minor changes to improve comments and fix the build on _WIN32 systems. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22391 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-12 02:36:10 +00:00
Chris Lattner
3249bfc828 Add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22390 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-12 02:35:36 +00:00
Nate Begeman
fb5792f416 Implement Subtarget support 
Implement the X86 Subtarget.

This consolidates the checks for target triple, and setting options based
on target triple into one place.  This allows us to convert the asm printer
and isel over from being littered with "forDarwin", "forCygwin", etc. into
just having the appropriate flags for each subtarget feature controlling
the code for that feature.

This patch also implements indirect external and weak references in the
X86 pattern isel, for darwin.  Next up is to convert over the asm printers
to use this new interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22389 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-12 01:41:54 +00:00
Nate Begeman
73213f6c07 Commit some pending darwin changes before subtarget support. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22388 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-12 01:37:28 +00:00
Chris Lattner
c569d79a2a Output .size directives to tell the assembler the size of each function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22381 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-11 06:29:14 +00:00
Chris Lattner
b12c9fa565 Fix crazy indentation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22380 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-11 06:25:47 +00:00
Chris Lattner
81b6ed7ed1 Refactor things a bit to allow the ELF code emitter to run the X86 machine code emitter 
after itself.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22376 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-11 05:17:48 +00:00
Chris Lattner
efb4bf0de6 Remove prototype for non-existant function 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22372 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-11 04:20:55 +00:00
Chris Lattner
bce81ae51e Change *EXTLOAD to use an VTSDNode operand instead of being an MVTSDNode. 
This is the last MVTSDNode.

This allows us to eliminate a bunch of special case code for handling
MVTSDNodes.

Also, remove some uses of dyn_cast that should really be cast (which is
cheaper in a release build).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22368 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-10 01:56:13 +00:00
Chris Lattner
9fadb4c1c0 Change TRUNCSTORE to use a VTSDNode operand instead of being an MVTSTDNode 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22366 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-10 00:29:18 +00:00
Nate Begeman
72b286b0a0 Add support for assembling .s files on mac os x for intel 
Add support for running bugpoint on mac os x for intel


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22351 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-08 00:23:26 +00:00
Chris Lattner
8d4b9eddc0 Restore some code that was accidentally removed by Nate's patch yesterday. 
This fixes the regressions from last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22344 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-07 17:12:53 +00:00
Nate Begeman
b8aa3ac678 Fix a typo in my checkin today that caused regressions. Oops! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22341 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-07 06:32:01 +00:00
Nate Begeman
f63be7d395 First round of support for doing scalar FP using the SSE2 ISA extension and 
XMM registers.  There are many known deficiencies and fixmes, which will be
addressed ASAP.  The major benefit of this work is that it will allow the
LLVM register allocator to allocate FP registers across basic blocks.

The x86 backend will still default to x87 style FP.  To enable this work,
you must pass -enable-sse-scalar-fp and either -sse2 or -sse3 to llc.

An example before and after would be for:
double foo(double *P) { double Sum = 0; int i; for (i = 0; i < 1000; ++i)
                        Sum += P[i]; return Sum; }

The inner loop looks like the following:
x87:
.LBB_foo_1:     # no_exit
        fldl (%esp)
        faddl (%eax,%ecx,8)
        fstpl (%esp)
        incl %ecx
        cmpl $1000, %ecx
        #FP_REG_KILL
        jne .LBB_foo_1  # no_exit

SSE2:
        addsd (%eax,%ecx,8), %xmm0
        incl %ecx
        cmpl $1000, %ecx
        #FP_REG_KILL
        jne .LBB_foo_1  # no_exit


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22340 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-06 18:59:04 +00:00
Chris Lattner
e0fe225e89 Make several cleanups to Andrews varargs change: 
1. Pass Value*'s into lowering methods so that the proper pointers can be
   added to load/stores from the valist
2. Intrinsics that return void should only return a token chain, not a token
   chain/retval pair.
3. Rename LowerVAArgNext -> LowerVAArg, because VANext is long gone.
4. Now that we have Value*'s available in the lowering methods, pass them
   into any load/stores from the valist that are emitted


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22339 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-05 19:58:54 +00:00
Chris Lattner
08568cfe25 Fit to 80 columns 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22336 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-05 17:50:16 +00:00
Chris Lattner
6a709a418b Percolate the call up to the right superclass 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22330 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-03 17:34:39 +00:00
Nate Begeman
4eb74ba602 The statistic needs to be in the correct namespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22327 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-01 23:56:38 +00:00
Chris Lattner
b36cbd0286 Refactor X86AsmPrinter.cpp into multiple files. Patch contributed 
by Aaron Gray, cleaned up by me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22324 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-01 22:44:09 +00:00
Nate Begeman
9d19eb459c Make the x86 asm printer darwin-aware. This mostly entails doing the same 
thing as cygwin most of the time, and printing our alignments in log2
rather than number of bytes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22316 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-30 00:53:20 +00:00
Nate Begeman
f1702ac589 Initial set of .td file changes necessary to get scalar fp in xmm registers 
working.  The instruction selector changes will hopefully be coming later
this week once they are debugged.  This is necessary to support the darwin
x86 FP model, and is recommended by intel as the replacement for x87.  As
a bonus, the register allocator knows how to deal with these registers
across basic blocks, unliky the FP stackifier.  This leads to significantly
better codegen in several cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22300 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-27 21:20:31 +00:00
Chris Lattner
07a9144efe Add support to the X86 backend for emitting ELF files. To use this, we 
currently use: llc t.bc --filetype=obj

This will produce a t.o file which is dumpable with readelf.  Currently
the file produced is empty, but the scaffolding to do more is now in place.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22292 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-27 06:30:12 +00:00
Chris Lattner
0431c96cec Refactor the addPassesToEmitAssembly interface into a addPassesToEmitFile 
interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22282 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-25 02:48:37 +00:00
Andrew Lenharth
213e557cef If we support structs as va_list, we must pass pointers to them to va_copy 
See last commit for LangRef, this implements it on all targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22273 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-22 21:04:42 +00:00
John Criswell
57c24508d3 Fixed indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22270 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-20 19:59:22 +00:00
Andrew Lenharth
558bc88a00 core changes for varargs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22254 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-18 18:34:52 +00:00
Chris Lattner
9cb2d6167d silence a bogus warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22245 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-17 13:23:32 +00:00
Nate Begeman
6dae3308f5 Fix lli linking on Mac OS X 10.4.1 for Intel. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22200 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-08 01:02:38 +00:00
Reid Spencer
628214eb74 Make sure that Cygwin assembly includes _ as part of function names. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22190 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-06-02 21:33:19 +00:00
Nate Begeman
be13634907 C'mon everybody, let's modify X86JITInfo.cpp. This time, we add <iostream> 
so that the shiny new use of std::cerr is defined.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22156 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-20 21:29:24 +00:00
Misha Brukman
57ebf3d6a8 Since everyone else has "fixed" this file, might as well join in the fun. 
* Change assert() to std::cerr printout, as it will not appear in opt builds
* Add comments to clarify what #ifdef/#else/#endif match what condition(s)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22154 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-20 19:46:50 +00:00
Chris Lattner
170fbcbc63 Fix this a 3rd time :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22151 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-20 17:00:21 +00:00
Andrew Lenharth
75a51277d2 fix compilation error due to no abort being defined. There is probably a better way to do this 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22150 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-20 16:34:44 +00:00
Duraid Madina
732c843f0e this seems dead (and broke the ia64 build, so..) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22147 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-20 06:21:59 +00:00
Jeff Cohen
8bc6f934e8 Fix tail call support in VC++ builds 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22143 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-20 01:35:39 +00:00
Chris Lattner
1030f72f8a Fastcc passes arguments in EAX and EDX, make sure the JIT doesn't clobber them 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22137 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-19 06:49:17 +00:00
Chris Lattner
16cb6f82eb Tailcalls require stubs to be emitted. Otherwise, the compilation callback 
doesn't know who 'called' it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22136 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-19 05:54:33 +00:00
Chris Lattner
ea0354346f don't reserve space for tailcall arg areas. It explicitly managed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22050 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 06:07:10 +00:00
Chris Lattner
5fae9ccd39 Teach reginfo how to deal with ADJSTACKPTRri, allowing us to generate: 
add %ESP, 20
        jmp %EDX  # TAIL CALL

instead of:
        add %ESP, -8
        add %ESP, 28
        jmp %EDX  # TAIL CALL


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22047 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 05:49:58 +00:00
Chris Lattner
381e88799e Implement proper tail calls in the X86 backend for all fastcc->fastcc 
tail calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22046 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 05:46:45 +00:00
Chris Lattner
1e9448bce8 Add markers in the asm file for tail calls, add a new ADJSTACKPTRri 
sorta-pseudo-instruction


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22042 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 03:10:37 +00:00
Chris Lattner
0dede079e7 Yes, calltarget is the operand of the day. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22040 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 01:10:30 +00:00
Chris Lattner
6972177bd4 When emitting the function epilog, check to see if there already a stack 
adjustment.  If so, we merge the adjustment into the existing one.  This
allows us to generate:

caller2:
        sub %ESP, 12
        mov DWORD PTR [%ESP], 0
        mov %EAX, 1234567890
        mov %EDX, 0
        call func2
        add %ESP, 8
        ret 4

intead of:

caller2:
        sub %ESP, 12
        mov DWORD PTR [%ESP], 0
        mov %EAX, 1234567890
        mov %EDX, 0
        call func2
        sub %ESP, 4
        add %ESP, 12
        ret 4

for X86/fast-cc-merge-stack-adj.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22038 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 23:53:43 +00:00
Chris Lattner
2b3d56ee72 Add some new instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22036 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 23:35:21 +00:00
Chris Lattner
920c0aa9c2 Pass i64 values correctly split in reg/mem to fastcc calls. 
This fixes fourinarow with -enable-x86-fastcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22022 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 12:03:10 +00:00
Chris Lattner
239738a162 Use target-specific nodes for calls. This allows the fastcc code to not have 
to do ugly hackery to avoid emitting code like this:

   call foo
   mov vreg, EAX
   adjcallstackup ...

If foo is a fastcc call and if vreg gets spilled, we might end up with this:

   call foo
   mov [ESP+offset], EAX     ;; Offset doesn't consider the 12!
   sub ESP, 12

Which is bad.  The previous hacky code to deal with this was A) gross B) not
good enough.  In particular, it could miss cases and emit the bad code above.
Now we always emit this:

   call foo
   adjcallstackup ...
   mov vreg, EAX

directly.

This makes fastcc with callees poping the stack work much better.  Next
stop (finally!) really is tail calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22021 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 08:48:15 +00:00
Chris Lattner
67649dfc32 use a target-specific node and custom expander to lower long->FP to FILD64m. 
This should fix some missing symbols problems on BSD and improve performance
of programs that use that operation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22012 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 06:52:07 +00:00
Chris Lattner
10d2645710 Make sure the start of the arg area and the end (after the RA is pushed) 
is always 8-byte aligned for fastcc


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21995 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 23:49:10 +00:00
Chris Lattner
653f7230ad fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21991 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 22:46:57 +00:00
Chris Lattner
06cebb456a Fix the problems with callee popped argument lists 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21988 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 22:13:49 +00:00
Chris Lattner
ca96c8217d Don't emit SAR X, 0 in the case of sdiv Y, 2 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21986 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 21:50:27 +00:00
Chris Lattner
a96e577f53 Fix UnitTests/2005-05-13-SDivTwo.c 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21985 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 21:48:20 +00:00
Chris Lattner
3648c67eb2 switch to having the callee pop stack operands for fastcc. This is currently buggy 
do not use


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21984 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 21:44:04 +00:00
Chris Lattner
24ddc6d067 allow RETI 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21980 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 20:46:35 +00:00
Chris Lattner
2e7714ad2b Build TAILCALL nodes in LowerCallTo, treat them like normal calls everywhere. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21976 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 20:29:13 +00:00
Chris Lattner
adf6a965a3 Add an isTailCall flag to LowerCallTo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21958 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 18:50:42 +00:00
Chris Lattner
1be4811d34 add 'ret imm' instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21945 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 17:56:48 +00:00
Chris Lattner
63602fb868 Do not CopyFromReg physregs for live-in values. Instead, create a vreg for 
each live in, and copy the regs from the vregs.  As the very first thing we
do in the function, insert copies from the pregs to the vregs.  This fixes
problems where the token chain of CopyFromReg was not enough to allow reordering
of the copyfromreg nodes and other unchained nodes (e.g. div, which clobbers
eax on intel).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21932 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 07:38:09 +00:00
Chris Lattner
16cd04d26c rename the ADJCALLSTACKDOWN/ADJCALLSTACKUP nodes to be CALLSEQ_START/BEGIN. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21915 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 23:24:06 +00:00
Chris Lattner
c6f4181923 Add a new -enable-x86-fastcc option that enables passing the first 
two integer values in registers for the fastcc calling conv.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21912 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 23:06:28 +00:00
Chris Lattner
c57f682113 Pass in Calling Convention to use into LowerCallTo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21899 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 19:56:45 +00:00
Chris Lattner
6649418598 Enable pattern isel by default 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21898 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-12 19:56:09 +00:00
Chris Lattner
c610d4267f X86 has more than just 32-bit registers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21857 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-11 05:00:34 +00:00
Chris Lattner
6415bb4c29 Convert feature of the simple isel over for the pattern isel to use. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21840 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 03:53:18 +00:00
Jeff Cohen
19bb2283e6 Silence some VC++ warnings 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21838 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-10 02:22:38 +00:00
Chris Lattner
966cdfb600 Implement READPORT/WRITEPORT, implementing the last X86 regression tests 
that were failing with the pattern selector.  Note that the support that
existed in the simple selector was clearly broken in several ways though
(which has also been fixed).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21831 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 21:17:38 +00:00
Chris Lattner
cecd67b432 do not emit illegal instructions 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21830 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 21:06:04 +00:00
Chris Lattner
82c7897f49 Fix the syntax of the i/o instructions, these are obviously unused. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21829 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:49:20 +00:00
Chris Lattner
4e6ce5f9c7 legalize readio/writeio into load/stores, fixing CodeGen/X86/io.llx with 
the pattern isel.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21828 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 20:37:29 +00:00
Chris Lattner
a0dbf181e0 restore some non-dead code I removed last night breaking double casts to 
uint


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21821 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 18:37:02 +00:00
Chris Lattner
a80d2bd89c Wrap long lines, remove dead code that is now handled by legalize 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21811 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 05:40:26 +00:00
Chris Lattner
2afa1910d4 Fix FP -> bool casts 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21810 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 05:33:18 +00:00
Chris Lattner
e3e0f2765a Fix X86/2005-05-08-FPStackifierPHI.ll: ugly gross hack. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21801 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-09 03:36:39 +00:00
Andrew Lenharth
b5884d3116 fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21693 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-04 19:25:37 +00:00
Andrew Lenharth
691ef2ba06 Implement count leading zeros (ctlz), count trailing zeros (cttz), and count 
population (ctpop).  Generic lowering is implemented, however only promotion
is implemented for SelectionDAG at the moment.

More coming soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21676 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-03 17:19:30 +00:00
Chris Lattner
c5dcb53bea Add support for FSIN/FCOS when unsafe math ops are enabled. Patch contributed by 
Morten Ofstad!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21632 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:25:35 +00:00
Chris Lattner
5434b429c8 Add support for llvm.sqrt and sin/cos if unsafe math optimizations are enabled. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21631 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-30 04:12:40 +00:00
Chris Lattner
2c56e8a23e Add support for FSQRT node, patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21610 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 22:07:18 +00:00
Chris Lattner
5afc124bdf Add some new X86 instrs, patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21608 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 21:50:05 +00:00
Chris Lattner
3b6b63711e Codegen fabs/fabsf as FABS. Patch contributed by Morten Ofstad 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21607 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-28 21:48:42 +00:00
Andrew Lenharth
2d86ea21dd Implement Value* tracking for loads and stores in the selection DAG. This enables one to use alias analysis in the backends. 
(TRUNK)Stores and (EXT|ZEXT|SEXT)Loads have an extra SDOperand which is a SrcValueSDNode which contains the Value*.  Note that if the operation is introduced by the backend, it will still have the operand, but the value* will be null.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21599 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-27 20:10:01 +00:00
Misha Brukman
0e0a7a45d3 * Remove trailing whitespace 
* Convert tabs to spaces


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21426 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 23:38:14 +00:00
Chris Lattner
109026290b Handle stores of global address as stores of immediates. Instead of: 
test1:
        movl $N, %eax
        movl %eax, G
        ret

emit:

test1:
        movl $N, G
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21407 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 19:11:03 +00:00
Chris Lattner
75f354bd7a Handle (store &GV -> mem) as a store immediate. This often occurs for 
printf format strings and other stuff.  Instead of generating this:

        movl $l1__2E_str_1, %eax
        movl %eax, (%esp)

we now emit:

        movl $l1__2E_str_1, (%esp)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21406 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-21 19:03:24 +00:00
Nate Begeman
f8b02949e3 Make pattern isel default for ppc 
Add new ppc beta option related to using condition registers
Make pattern isel control flag (-enable-pattern-isel) global and tristate
  0 == off
  1 == on
  2 == target default


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21309 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-15 22:12:16 +00:00
Chris Lattner
5bf2686a1b Fix some mysteriously missing {}'s which cause the miscompilation of 
Olden/mst, Ptrdist/bc, Obsequi, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21274 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 03:29:53 +00:00
Chris Lattner
91302a10ae Z_E_I is gone 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21267 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-13 02:39:05 +00:00
Chris Lattner
4c52f0ec8c Use live out sets for return values instead of imp_defs, which is cleaner and faster. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21181 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 15:23:56 +00:00
Chris Lattner
da4d4694a8 This target does not support/want ISD::BRCONDTWOWAY 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21164 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-09 03:22:37 +00:00
Chris Lattner
6659bd7592 X86 zero extends setcc results 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21146 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-07 19:41:46 +00:00
Chris Lattner
6d027f2e6f Fix SingleSource/Regression/C/2005-05-06-LongLongSignedShift.c, we were not 
properly sign extending the top of the result of a 64-bit shift right by
a constant > 32.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21120 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 20:59:35 +00:00
Chris Lattner
8db0af1c8d Add (untested) support for MULHS and MULHU. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21107 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 04:21:07 +00:00
Chris Lattner
1e6a71524e add signed versions of the extra precision multiplies 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21106 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-06 04:19:22 +00:00
Chris Lattner
b7edaa1d08 add support for FABS and FNEG 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21015 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 05:30:17 +00:00
Chris Lattner
43fdea070c This target doesn't support fabs/fneg yet. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21010 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 05:03:24 +00:00
Chris Lattner
b1f26fb921 add an fabs instr 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21006 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 04:31:56 +00:00
Chris Lattner
b38a7495da Add support for 64-bit shifts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21005 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-02 04:01:14 +00:00
Chris Lattner
7ce7eff54c Add support for ISD::UNDEF to the X86 be 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20990 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-01 22:46:45 +00:00
Chris Lattner
71df3f8cab don't depend on the cfg being set up yet 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20936 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-30 01:10:00 +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
1bcb9abb30 eliminate dead variables, patch contributed by Gabor Greif! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20812 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-24 17:32:20 +00:00
Nate Begeman
85fdeb233e Remove comments that are now meaningless from the pattern ISels, at Chris's 
request.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20804 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-24 04:39:54 +00:00
Chris Lattner
7805fa4acc Don't emit two comparisons when comparing a FP value against zero! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20651 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-17 16:29:26 +00:00
Chris Lattner
5b3a4553c1 Fix the missing symbols problem Bill was hitting. Patch contributed by 
Bill Wendling!!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20649 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-17 15:38:16 +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
Reid Spencer
d632f4977e Patch to make assembly output compatible with mingw compilation (identical 
to cygwin)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20520 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-03-08 17:02:05 +00:00
Chris Lattner
da895d6337 Fix spelling, patch contributed by Gabor Greif! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20343 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-27 06:18:25 +00:00
Chris Lattner
572dd08204 Silence some uninit variable warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20284 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-02-23 05:57:21 +00:00
Chris Lattner
3576c84baf We can fold promoted and non-promoted loads into divs also! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19835 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-25 20:35:10 +00:00
Chris Lattner
44129b5b68 Fold promoted loads into binary ops for FP, allowing us to generate m32 forms 
of FP ops.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19834 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-25 20:03:11 +00:00
Chris Lattner
0a07883694 Silence a warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19798 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-23 23:20:06 +00:00
Chris Lattner
42e25b387f Allow the FP stackifier to completely ignore functions that do not use FP at 
all.  This should speed up the X86 backend fairly significantly on integer
codes.  Now if only we didn't have to compute livevar still... ;-)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19796 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-23 23:13:59 +00:00
Reid Spencer
5dc81f63d1 Support Cygwin assembly generation. The cygwin version of Gnu ASsembler 
doesn't support certain directives and symbols on cygwin are prefixed with
an underscore. This patch makes the necessary adjustments to the output.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19775 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-23 03:52:14 +00:00
Chris Lattner
fb0f53f9c1 Speed up folding operations into loads. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19733 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 21:43:02 +00:00
Chris Lattner
67b1c3c404 The ever-important vanity pass name :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19731 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 21:35:14 +00:00
Chris Lattner
b62e1e296e Fix a FIXME: realize that argument stores are all independent (don't alias) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19728 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-21 19:46:38 +00:00
Chris Lattner
19ad0620bc Implement ADD_PARTS/SUB_PARTS so that 64-bit integer add/sub work. This 
fixes most of the remaining llc-beta failures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19716 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 18:53:00 +00:00
Chris Lattner
bf52d49f36 Fix a crash compiling 134.perl. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19711 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-20 16:50:16 +00:00
Chris Lattner
c3c021bcad Fix a problem where were were literally selecting for INCREASED register 
pressure, not decreases register pressure.  Fix problem where we accidentally
swapped the operands of SHLD, which caused fourinarow to fail.  This fixes
fourinarow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19697 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 17:24:34 +00:00
Chris Lattner
a76f04828a When commuting these instructions, make sure to actually swap the operands too. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19694 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 16:55:52 +00:00
Chris Lattner
4053b1e30b Implement Regression/CodeGen/X86/rotate.ll: emit rotate instructions (which 
typically cost 1 cycle) instead of shld/shrd instruction (which are typically
6 or more cycles).  This also saves code space.

For example, instead of emitting:

rotr:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %CL, BYTE PTR [%ESP + 8]
        shrd %EAX, %EAX, %CL
        ret
rotli:
        mov %EAX, DWORD PTR [%ESP + 4]
        shrd %EAX, %EAX, 27
        ret

Emit:

rotr32:
        mov %CL, BYTE PTR [%ESP + 8]
        mov %EAX, DWORD PTR [%ESP + 4]
        ror %EAX, %CL
        ret
rotli32:
        mov %EAX, DWORD PTR [%ESP + 4]
        ror %EAX, 27
        ret

We also emit byte rotate instructions which do not have a sh[lr]d counterpart
at all.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19692 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 08:07:05 +00:00
Chris Lattner
40ff633b05 Add rotate instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19690 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:50:03 +00:00
Chris Lattner
30ea1e9411 Match 16-bit shld/shrd instructions as well, implementing shift-double.llx:test5 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19689 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:37:26 +00:00
Chris Lattner
0df53d22c3 Improve coverage of the X86 instruction set by adding 16-bit shift doubles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19687 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:31:24 +00:00
Chris Lattner
41e431ba04 Teach the code generator that shrd/shld is commutable if it has an immediate. 
This allows us to generate this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        shld %EDX, %EDX, 2
        shl %EAX, 2
        ret

instead of this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, DWORD PTR [%ESP + 8]
        mov %EDX, %EAX
        shrd %EDX, %ECX, 30
        shl %EAX, 2
        ret

Note the magically transmogrifying immediate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19686 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 07:11:01 +00:00
Chris Lattner
8571637ee9 Codegen long >> 2 to this: 
foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        shrd %EAX, %EDX, 2
        sar %EDX, 2
        ret

instead of this:

test1:
        mov %ECX, DWORD PTR [%ESP + 4]
        shr %ECX, 2
        mov %EDX, DWORD PTR [%ESP + 8]
        mov %EAX, %EDX
        shl %EAX, 30
        or %EAX, %ECX
        sar %EDX, 2
        ret

and long << 2 to this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, DWORD PTR [%ESP + 8]
***     mov %EDX, %EAX
        shrd %EDX, %ECX, 30
        shl %EAX, 2
        ret

instead of this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, %EAX
        shr %ECX, 30
        mov %EDX, DWORD PTR [%ESP + 8]
        shl %EDX, 2
        or %EDX, %ECX
        shl %EAX, 2
        ret

The extra copy (marked ***) can be eliminated when I teach the code generator
that shrd32rri8 is really commutative.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19681 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 06:18:43 +00:00
Chris Lattner
009b55b6f6 X86 shifts mask the amount. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19678 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-19 03:36:30 +00:00
Chris Lattner
477c931852 Code to handle FP_EXTEND is dead now. X86 doesn't support any data types to 
FP_EXTEND from!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19674 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 20:05:56 +00:00
Chris Lattner
3dd68151dc Remove more dead code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19673 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:50:08 +00:00
Chris Lattner
a7a4c0f7c4 The selection dag code handles the promotions from F32 to F64 for us, so we 
don't need to even think about F32 in the X86 code anymore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19672 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 19:46:54 +00:00
Chris Lattner
b422aeac9e Fix 124.m88ksim. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19667 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 17:35:28 +00:00
Chris Lattner
811482a82b Do not emit loads multiple times, potentially in the wrong places. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19661 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 04:18:32 +00:00
Chris Lattner
b71f8fc99d Eliminate bad assertions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19659 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 04:00:54 +00:00
Chris Lattner
4a108668df * Eliminate the TokenSet and just use the ExprMap for both tokens and values. 
* Insert some really pedantic assertions that will notice when we emit the
  same loads more than one time, exposing bugs.  This turns a miscompilation in
  bzip2 into a compile-fail.  yaay.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19658 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 03:51:59 +00:00
Chris Lattner
883c86f510 Rely on the code in MatchAddress to do this work. Otherwise we fail to 
match (X+Y)+(Z << 1), because we match the X+Y first, consuming the index
register, then there is no place to put the Z.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19652 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 02:25:52 +00:00
Chris Lattner
98a8ba0393 Fix a problem where probing for addressing modes caused expressions to be 
emitted too early.  In particular, this fixes
Regression/CodeGen/X86/regpressure.ll:regpressure3.

This also improves the 2nd basic block in 164.gzip:flush_block, which went from

.LBBflush_block_1:      # loopentry.1.i
        movzx %EAX, WORD PTR [dyn_ltree + 20]
        movzx %ECX, WORD PTR [dyn_ltree + 16]
        mov DWORD PTR [%ESP + 32], %ECX
        movzx %ECX, WORD PTR [dyn_ltree + 12]
        movzx %EDX, WORD PTR [dyn_ltree + 8]
        movzx %EBX, WORD PTR [dyn_ltree + 4]
        mov DWORD PTR [%ESP + 36], %EBX
        movzx %EBX, WORD PTR [dyn_ltree]
        add DWORD PTR [%ESP + 36], %EBX
        add %EDX, DWORD PTR [%ESP + 36]
        add %ECX, %EDX
        add DWORD PTR [%ESP + 32], %ECX
        add %EAX, DWORD PTR [%ESP + 32]
        movzx %ECX, WORD PTR [dyn_ltree + 24]
        add %EAX, %ECX
        mov %ECX, 0
        mov %EDX, %ECX

to

.LBBflush_block_1:      # loopentry.1.i
        movzx %EAX, WORD PTR [dyn_ltree]
        movzx %ECX, WORD PTR [dyn_ltree + 4]
        add %ECX, %EAX
        movzx %EAX, WORD PTR [dyn_ltree + 8]
        add %EAX, %ECX
        movzx %ECX, WORD PTR [dyn_ltree + 12]
        add %ECX, %EAX
        movzx %EAX, WORD PTR [dyn_ltree + 16]
        add %EAX, %ECX
        movzx %ECX, WORD PTR [dyn_ltree + 20]
        add %ECX, %EAX
        movzx %EAX, WORD PTR [dyn_ltree + 24]
        add %ECX, %EAX
        mov %EAX, 0
        mov %EDX, %EAX

... which results in less spilling in the function.

This change alone speeds up 164.gzip from 37.23s to 36.24s on apoc.  The
default isel takes 37.31s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19650 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-18 01:06:26 +00:00
Chris Lattner
e9fe2bcac2 Fix indentation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19649 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 23:25:45 +00:00
Chris Lattner
869e0434ae Don't bother using max here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19647 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 23:02:13 +00:00
Chris Lattner
90d1be7eef Do not give token factor nodes outrageous weights 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19645 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 22:56:09 +00:00
Chris Lattner
5c65981a57 Two changes: 
1. Fold  [mem] += (1|-1) into inc [mem]/dec [mem] to save some icache space.
 2. Do not let token factor nodes prevent forming '[mem] op= val' folds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19643 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 22:10:42 +00:00
Chris Lattner
e10269ba30 Refactor load/op/store folding into it's own method, no functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19641 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 19:25:26 +00:00
Chris Lattner
ae3ffba466 Fix a major regression last night that prevented us from producing [mem] op= reg 
operations.

The body of the if is less indented but unmodified in this patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19638 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 17:49:14 +00:00
Chris Lattner
2a4e508281 Codegen this: 
int %foo(int %X) {
        %T = add int %X, 13
        %S = mul int %T, 3
        ret int %S
}

as this:

        mov %ECX, DWORD PTR [%ESP + 4]
        lea %EAX, DWORD PTR [%ECX + 2*%ECX + 39]
        ret

instead of this:

        mov %ECX, DWORD PTR [%ESP + 4]
        mov %EAX, %ECX
        add %EAX, 13
        imul %EAX, %EAX, 3
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19633 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 06:48:02 +00:00
Chris Lattner
4ff348befa Fix test/Regression/CodeGen/X86/2005-01-17-CycleInDAG.ll and 132.ijpeg. 
Do not fold a load into an operation if it will induce a cycle in the DAG.

Repeat after me: dAg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19631 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 06:26:58 +00:00
Chris Lattner
cb1aa8d772 Do not fold a load into a comparison that is used by more than one place. 
The comparison will probably be folded, so this is not ok to do.
This fixed 197.parser.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19624 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-01-17 01:34:14 +00:00