442beabbf7
Add 'Indirect' LocInfo class and use to pass __m128 on win64. Also minore fixes here and there (mostly __m64).
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llvm-svn: 77964
2009-08-03 08:13:56 +00:00
72bc3846bc
Cleanup Darwin MMX calling conv stuff - make the stuff more generic. This also fixes a subtle bug, when 6th v1i64 argument passed wrongly.
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llvm-svn: 77963
2009-08-03 08:13:24 +00:00
71386e08fe
Unbreak Win64 CC. Step one: honour register save area, fix some alignment and provide a different set of call-clobberred registers.
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llvm-svn: 77962
2009-08-03 08:12:53 +00:00
e3a018d707
Fix Bug 4278: X86-64 with -tailcallopt calling convention
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out of sync with regular cc.
The only difference between the tail call cc and the normal
cc was that one parameter register - R9 - was reserved for
calling functions through a function pointer. After time the
tail call cc has gotten out of sync with the regular cc.
We can use R11 which is also caller saved but not used as
parameter register for potential function pointers and
remove the special tail call cc on x86-64.
llvm-svn: 73233
2009-06-12 16:26:57 +00:00
efd2d44aa5
I was convinced that it's ok to allow a second i8 return value
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to be returned in DL. LLVM's multiple-return-value support is
not ABI-conforming; front-ends that wish to have code emitted
that conforms to an ABI are currently expected to make
arrangements for this on their own rather than assuming that
multiple-return-values will automatically do the right thing.
This commit doesn't fundamentally change this situation.
llvm-svn: 67588
2009-03-24 01:04:34 +00:00
772de0ae2d
Fix a grammaro in a comment that Bill noticed.
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llvm-svn: 67507
2009-03-23 05:02:44 +00:00
70d9929def
Add comments explaining why there's only one register for
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i8 return values.
llvm-svn: 67502
2009-03-23 04:28:24 +00:00
9f8fddeed8
Only v1i16 (i.e. _m64) is returned via RAX / RDX.
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llvm-svn: 65313
2009-02-23 09:03:22 +00:00
e4ffc030e2
Be bug compatible with gcc by returning MMX values in RAX.
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llvm-svn: 65274
2009-02-22 08:05:12 +00:00
a2d1f35e9a
Implement -mno-sse: if SSE is disabled on x86-64, don't store XMM on stack for
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var-args, and don't allow FP return values
llvm-svn: 63495
2009-02-01 18:15:56 +00:00
0c8df671ac
Fix this comment to reflect that it applies to types other
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than just i32.
llvm-svn: 60455
2008-12-03 01:39:44 +00:00
5d3d1f69e1
Fix byval arguments in the fastcc calling convention. The fastcc convention
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delegates to the regular x86-32 convention which handles byval, but only
after it handles a few cases, and it's necessary to handle byval before
handling those cases. This fixes PR3122 (and rdar://6400815), llvm-gcc
miscompiling LLVM.
llvm-svn: 60453
2008-12-03 01:28:04 +00:00
e15a540071
Allow XMM2 and XMM3 to be used for non ABI compliant code.
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llvm-svn: 59720
2008-11-20 07:48:19 +00:00
0e32a2c935
Add "inreg" field to CallSDNode (doesn't increase
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its size). Adjust various lowering functions to
pass this info through from CallInst. Use it to
implement sseregparm returns on X86. Remove
X86_ssecall calling convention.
llvm-svn: 56677
2008-09-26 19:31:26 +00:00
c50ada2f56
Accept 'inreg' attribute on x86 functions as
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meaning sse_regparm (i.e. float/double values go
in XMM0 instead of ST0). Update documentation
to reflect reality.
llvm-svn: 56619
2008-09-25 20:47:45 +00:00
796a271c5f
Change the calling convention used when tail call optimization is enabled from CC_X86_32_TailCall to CC_X86_32_FastCC.
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llvm-svn: 56436
2008-09-22 14:50:07 +00:00
4f0d21592a
If SSE2 is available, x86 should pass first 3 f32/f64 arguments in XMM registers for fastcc calls.
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llvm-svn: 55840
2008-09-05 17:24:07 +00:00
6c94b99c62
For whatever the reason, x86 CallingConv::Fast (i.e. fastcc) was not passing scalar arguments in registers. This patch defines a new fastcc CC which is slightly different from the FastCall CC. In addition to passing integer arguments in ECX and EDX, it also specify doubles are passed in 8-byte slots which are 8-byte aligned (instead of 4-byte aligned). This avoids a potential performance hazard where doubles span cacheline boundaries.
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llvm-svn: 55807
2008-09-04 22:59:58 +00:00
e5f4ffbdf1
Add v2f32 (MMX) type to X86. Support is primitive:
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load,store,call,return,bitcast. This is enough to
make call and return work.
llvm-svn: 52691
2008-06-24 22:01:44 +00:00
fac70f2f44
Fix FP return for Win64 ABI
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llvm-svn: 50342
2008-04-28 07:40:07 +00:00
b5096e9c73
Handle fp80 for win64
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llvm-svn: 50324
2008-04-27 22:54:09 +00:00
df38b35a1e
MMX argument passing fixes:
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On Darwin / Linux x86-32, v8i8, v4i16, v2i32 values are passed in MM[0-2].
On Darwin / Linux x86-32, v1i64 values are passed in memory.
On Darwin x86-64, v8i8, v4i16, v2i32 values are passed in XMM[0-7].
On Darwin x86-64, v1i64 values are passed in 64-bit GPRs.
llvm-svn: 50257
2008-04-25 07:56:45 +00:00
3d074a3125
Add XMM1 as a second return value register for f32 and f64 on x86-64. This
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is needed for the x86-64-ABI handling of structs that contain floating-point
members that are returned by value.
llvm-svn: 49441
2008-04-09 17:54:37 +00:00
cbf87313a2
Add DX as a second return value register for i16 on x86.
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llvm-svn: 49440
2008-04-09 17:53:38 +00:00
20c9e4cbee
Add new CC lowering rule: provide a list of registers, which can be 'shadowed',
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when some another register is used for argument passing.
Currently is used on Win64.
llvm-svn: 49079
2008-04-02 05:23:57 +00:00
1fdd5e9133
Minor typo fixes. Also add another FIXME.
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llvm-svn: 48710
2008-03-23 20:32:06 +00:00
7f125b2ba5
Add convenient helper for win64 check. Simplify things slightly.
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llvm-svn: 48691
2008-03-22 20:57:27 +00:00
7b4f4e1a86
Initial support for Win64 calling conventions. Still in early state.
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llvm-svn: 48690
2008-03-22 20:37:30 +00:00
b6f04a3e0a
Enable support for returning two long-double values in ST(0)/ST(1).
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This allows us to compile fp-stack-2results.ll into:
_test:
fldz
fld1
ret
which returns 1 in ST(0) and 0 in ST(1). This is needed for x86-64
_Complex long double.
llvm-svn: 48632
2008-03-21 05:57:20 +00:00
eac159c1f0
MMX vectors are passed 4-byte aligned.
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llvm-svn: 47483
2008-02-22 17:47:28 +00:00
d88f1d060e
Implement sseregparm.
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llvm-svn: 46764
2008-02-05 20:46:33 +00:00
1e0d4d2aa8
SSE varargs arguments are passed in memory.
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llvm-svn: 46262
2008-01-22 23:26:53 +00:00
3e95d963e9
Need to handle any 'nest' parameter before integer
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parameters, since otherwise it won't be passed in
the right register. With this change trampolines
work on x86-64 (thanks to Luke Guest for providing
access to an x86-64 box).
llvm-svn: 46192
2008-01-19 16:42:10 +00:00
4d70ba3134
Rename CCIfStruct to CCIfByVal and CCStructAssign to CCPassByVal. Remove unused parameters of CCStructAssign and add size and alignment requirement info.
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llvm-svn: 45997
2008-01-15 03:34:58 +00:00
48bdfe63e2
Both x86-32 and x86-64 handle byval parameter attributes.
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llvm-svn: 45996
2008-01-15 03:15:41 +00:00
d8d4170f84
Unbreak x86-32 darwin long double!
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llvm-svn: 45703
2008-01-07 16:36:38 +00:00
28bf7ac219
Fix long double support on x86-32 linux.
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llvm-svn: 45701
2008-01-07 13:44:22 +00:00
f3ebc3f3d2
Remove attribution from file headers, per discussion on llvmdev.
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llvm-svn: 45418
2007-12-29 20:36:04 +00:00
f7cefdd5f0
x86-32 long doubles are 4-byte aligned on the stack
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for parameter passing (only for that, on Darwin).
llvm-svn: 45038
2007-12-14 19:25:34 +00:00
6f026a654c
Support returning non-power-of-2 vectors to unblock some work
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llvm-svn: 44371
2007-11-27 19:28:48 +00:00
e2287ed552
Eliminate the recently introduced CCAssignToStackABISizeAlign
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in favour of teaching CCAssignToStack that size 0 and/or align
0 means to use the ABI values. This seems a neater solution.
It is safe since no legal value type has size 0.
llvm-svn: 44107
2007-11-14 08:29:13 +00:00
b988e7e8cd
Add CCAssignToStackABISizeAlign for convenience in
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dealing with types whose size & alignment are
different on different subtargets. Use it for x86 f80.
llvm-svn: 43988
2007-11-10 22:07:15 +00:00
29af26f147
Clarify that fastcc has a problem with nested function
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trampolines, rather than with nested functions themselves.
llvm-svn: 42955
2007-10-13 07:38:37 +00:00
1f0da1fefb
Corrected many typing errors. And removed 'nest' parameter handling
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for fastcc from X86CallingConv.td. This means that nested functions
are not supported for calling convention 'fastcc'.
llvm-svn: 42934
2007-10-12 21:30:57 +00:00
9ccea99165
Added tail call optimization to the x86 back end. It can be
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enabled by passing -tailcallopt to llc. The optimization is
performed if the following conditions are satisfied:
* caller/callee are fastcc
* elf/pic is disabled OR
elf/pic enabled + callee is in module + callee has
visibility protected or hidden
llvm-svn: 42870
2007-10-11 19:40:01 +00:00
7d67e547b5
More long double fixes. x86_64 should build now.
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llvm-svn: 42155
2007-09-19 23:55:34 +00:00
75169a82d6
Get X86 long double calling convention to work
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(on Darwin, anyway). Fix some table omissions for
LD arithmetic.
llvm-svn: 40877
2007-08-06 21:31:06 +00:00
ce38853cc6
Trampoline codegen support for X86-32.
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llvm-svn: 40566
2007-07-27 20:02:49 +00:00
b567e3ffb0
Add the byval attribute
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llvm-svn: 37940
2007-07-06 10:57:03 +00:00
f9ae1c6001
Vector results may be returned in XMM0 and XMM1, not just XMM0. With
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the recent lowering changes, this allows types like <4 x double> to
be returned, using two vector registers.
llvm-svn: 37844
2007-07-02 16:21:53 +00:00
Anton Korobeynikov