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381e88799e
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Author SHA1 Message Date
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
8a458764d6 Substantial edits for the release notes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22045 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 05:44:51 +00:00
Chris Lattner
e5eb6f829c Add some simplifications for MULH[SU]. This allows us to compile this: 
long %bar(long %X) {
  %Y = mul long %X, 4294967297
  ret long %Y
}

to this:

l1_bar:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, %EAX
        add %EDX, DWORD PTR [%ESP + 8]
        ret

instead of:

l1_bar:
        mov %ECX, DWORD PTR [%ESP + 4]
        mov %EDX, 1
        mov %EAX, %ECX
        mul %EDX
        add %EDX, %ECX
        add %EDX, DWORD PTR [%ESP + 8]
        mov %EAX, %ECX
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22044 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 05:39:08 +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
4fc997941d When inserting callee-save register reloads, make sure to skip over any 
terminator instructions before the 'ret' in case the target has a
multi-instruction return sequence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22041 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-15 03:09:58 +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
b73855bcd4 Make sure this is not eligible for tail-call-elimination so that we test 
the correct thing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22039 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 23:54:55 +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
3b8ce85b19 new testcase 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22037 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 23:52:09 +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
f5a5a6c666 add x86-64 abi 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22035 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 22:06:42 +00:00
Reid Spencer
50ffe0c7d1 * Truncate a long line. 
* By default, doxygen output formatted for printing on letter size paper
  not A4.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22034 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 20:06:31 +00:00
Reid Spencer
26a35003bf Forgot to commit this earlier. Its part of the simplify-libcalls 
enhancement for ffs, ffsl, and ffsll optimizations. We can't do the opt
unless we also have the at least ffsll function. Notably SVR4 doesn't.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22033 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 20:04:19 +00:00
Andrew Lenharth
01f40b37ab mention the C++ exception problems on alpha 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22029 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 17:43:00 +00:00
Reid Spencer
c6e3d5ea2e Add a test case for testing ffs libcall conversion to constant 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22028 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 16:44:43 +00:00
Reid Spencer
c29b13d648 Changes for ffs lib call simplification: 
* Check for availability of ffsll call in configure script
* Support ffs, ffsl, and ffsll conversion to constant value if the argument
  is constant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22027 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 16:42:52 +00:00
Chris Lattner
1ca85d567c Fix construction of ioport intrinsics, fixing X86/io.llx and io-port.llx 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22026 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 13:56:55 +00:00
Chris Lattner
65af1abd1e Preserve calling conv when hacking on calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22025 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 12:28:32 +00:00
Chris Lattner
e43702695d preserve calling conventions when hacking on code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22024 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 12:25:32 +00:00
Chris Lattner
16d0db2da8 Make sure to preserve the calling convention when changing an invoke into 
a call.  This fixes Prolangs-C++/deriv2, kimwitu++, and Misc-C++/bigfib
on X86 with -enable-x86-fastcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22023 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 12:21:56 +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
2789bde57f allow token chain at start or end of node 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22020 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 08:34:53 +00:00
Chris Lattner
3e01136f9f remove special case hacks for readport/readio from the binary operator 
codepath


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22019 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:45:46 +00:00
Chris Lattner
385328ce41 Implement fixme's by memoizing nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22018 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:42:29 +00:00
Chris Lattner
6765bfed31 add a new map 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22017 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:36:02 +00:00
Chris Lattner
b7f7d51422 Turn this into a wrapper for a simpler version of getNode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22016 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:32:14 +00:00
Chris Lattner
adf6c2a0cb Eliminate special purpose hacks for dynamic_stack_alloc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22015 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:29:57 +00:00
Chris Lattner
e89083a930 Use the general mechanism for creating multi-value nodes instead of using 
special case hacks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22014 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:25:05 +00:00
Chris Lattner
955c07cab0 Ensure these casts are done with the hardware fildll instruction 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22013 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 07:09:25 +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
5fa4fa4e0f Wrap long line, actually add node to the graph. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22011 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 06:42:57 +00:00
Chris Lattner
d73cc5d058 legalize target-specific operations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22010 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 06:34:48 +00:00
Chris Lattner
89c34637cb add a getNode() version that allows construction of any node type. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22009 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 06:20:26 +00:00
Chris Lattner
4211e73c49 Add a way to construct an arbitrary node, cleanly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22008 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 06:20:08 +00:00
Chris Lattner
50f5a51f41 add accessors 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22007 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 06:19:11 +00:00
Reid Spencer
0b2bc7e36f Some minor adjustments for the 1.5 release. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22006 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 05:52:07 +00:00
Chris Lattner
bc83996b31 Pass the dag into LowerOperation 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22005 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 05:51:05 +00:00
Chris Lattner
50381b6c41 LowerOperation takes a dag 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22004 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 05:50:48 +00:00
Duraid Madina
2e36d6ecb4 add a bit about the known problems on IA64 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22003 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 05:48:13 +00:00
Chris Lattner
38135af219 Print the symbolic register name in a register allocator debug dump. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22002 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 05:34:15 +00:00
Chris Lattner
a88a260dbd Allow targets to have a custom int64->fp expander if desired 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22001 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 05:33:54 +00:00
Chris Lattner
eb99a451e8 this passes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22000 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 02:35:38 +00:00
Chris Lattner
4032b9c94c Fix this 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21999 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 02:33:20 +00:00
Chris Lattner
120bc6da2f minor changes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21998 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 01:30:15 +00:00
Chris Lattner
a5a4f265f0 user ops are not encoded in the bc format 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21997 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 01:26:46 +00:00
Reid Spencer
a5681773ab Document the pseudo-instruction opcodes in opcode range 56-63. These are 
used to support things like volatile load/store, tail calls, and calling
conventions without reserving space for the additional information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21996 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-14 00:06:06 +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
bfed9247f1 fix the assertion 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21994 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 23:35:47 +00:00
Chris Lattner
a8217e3000 Align doubles on 8-byte boundaries if possible. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21993 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-05-13 23:14:17 +00:00