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Author SHA1 Message Date
Chris Lattner
9aec97df10 Implement an annoying part of the Darwin/X86 abi: the callee of a struct 
return argument pops the hidden struct pointer if present, not the caller.

For example, in this testcase:

struct X { int D, E, F, G; };
struct X bar() {
  struct X a;
  a.D = 0;
  a.E = 1;
  a.F = 2;
  a.G = 3;
  return a;
}
void foo(struct X *P) {
  *P = bar();
}

We used to emit:

_foo:
        subl $28, %esp
        movl 32(%esp), %eax
        movl %eax, (%esp)
        call _bar
        addl $28, %esp
        ret
_bar:
        movl 4(%esp), %eax
        movl $0, (%eax)
        movl $1, 4(%eax)
        movl $2, 8(%eax)
        movl $3, 12(%eax)
        ret

This is correct on Linux/X86 but not Darwin/X86.  With this patch, we now
emit:

_foo:
        subl $28, %esp
        movl 32(%esp), %eax
        movl %eax, (%esp)
        call _bar
***     addl $24, %esp
        ret
_bar:
        movl 4(%esp), %eax
        movl $0, (%eax)
        movl $1, 4(%eax)
        movl $2, 8(%eax)
        movl $3, 12(%eax)
***     ret $4

For the record, GCC emits (which is functionally equivalent to our new code):

_bar:
        movl    4(%esp), %eax
        movl    $3, 12(%eax)
        movl    $2, 8(%eax)
        movl    $1, 4(%eax)
        movl    $0, (%eax)
        ret     $4
_foo:
        pushl   %esi
        subl    $40, %esp
        movl    48(%esp), %esi
        leal    16(%esp), %eax
        movl    %eax, (%esp)
        call    _bar
        subl    $4, %esp
        movl    16(%esp), %eax
        movl    %eax, (%esi)
        movl    20(%esp), %eax
        movl    %eax, 4(%esi)
        movl    24(%esp), %eax
        movl    %eax, 8(%esi)
        movl    28(%esp), %eax
        movl    %eax, 12(%esi)
        addl    $40, %esp
        popl    %esi
        ret

This fixes SingleSource/Benchmarks/CoyoteBench/fftbench with LLC and the
JIT, and fixes the X86-backend portion of PR729.  The CBE still needs to
be updated.

llvm-svn: 28438
 2006-05-23 18:50:38 +00:00
Evan Cheng
6909147763 -enable-unsafe-fp-math implies -enable-finite-only-fp-math 
llvm-svn: 28437
 2006-05-23 18:18:46 +00:00
Vladimir Prus
b609f27099 Make class comment visible in Doxygen. 
llvm-svn: 28436
 2006-05-23 15:32:15 +00:00
Vladimir Prus
125917432a Fix missing include 
llvm-svn: 28435
 2006-05-23 13:43:15 +00:00
Evan Cheng
9b5ce5e4e9 Added a test case for FP equality check. 
llvm-svn: 28434
 2006-05-23 06:41:23 +00:00
Evan Cheng
19e9e63dcd Incorrect SETCC CondCode used for FP comparisons. 
llvm-svn: 28433
 2006-05-23 06:40:47 +00:00
Evan Cheng
86e56c1066 Added option -enable-finite-only-fp-math. When on, the codegen can assume that 
FP arithmetic arguments and results are never NaNs or +=Infs. This includes
ignoring parity flag (PF) when checking for FP equality.

llvm-svn: 28432
 2006-05-23 06:39:12 +00:00
Rafael Espindola
bb1e2e2c52 implement minimal versions of 
ARMAsmPrinter::runOnMachineFunction
LowerFORMAL_ARGUMENTS
ARMInstrInfo::isMoveInstr

llvm-svn: 28431
 2006-05-23 02:48:20 +00:00
Chris Lattner
904f4e5029 Describe how to add a custom test. 
llvm-svn: 28430
 2006-05-23 01:40:20 +00:00
Chris Lattner
c150366379 Wrap long lines fix typo 
llvm-svn: 28429
 2006-05-23 01:25:11 +00:00
Evan Cheng
c25e986c9f A isel deficiency. 
llvm-svn: 28427
 2006-05-22 05:54:49 +00:00
Reid Spencer
f628e4e774 For PR784: 
Support Win32 platforms for llvm-gcc path. Patch by Anton Korobeynikov

llvm-svn: 28426
 2006-05-21 10:40:20 +00:00
Evan Cheng
52fde7f5ce Back out indirect branch load folding hack. It broke some tests. 
llvm-svn: 28425
 2006-05-21 06:28:50 +00:00
Chris Lattner
9d6103087a Add a note 
llvm-svn: 28424
 2006-05-21 03:57:07 +00:00
Owen Anderson
4a78af08aa Make TargetData strings less redundant. 
llvm-svn: 28423
 2006-05-20 23:28:54 +00:00
Chris Lattner
1ddd46999b Silence a bogus gcc warning 
llvm-svn: 28422
 2006-05-20 23:14:03 +00:00
Chris Lattner
c7de368bda Fix a parsing bug that caused 7 llvm-test regressions on PPC last night. 
I'm suprised it didn't cause more!

llvm-svn: 28421
 2006-05-20 21:16:59 +00:00
Evan Cheng
a0bbbba168 - Use of load's chain result should be redirected to load's chain operand. 
If it reads the chain result of the call, then the use, callseq_start,
  and call would form a cycle!
- Don't forget handle node replacement!
- There could also be a TokenFactor between the load and the callseq_start.

llvm-svn: 28420
 2006-05-20 09:21:39 +00:00
Evan Cheng
bb6733743e A new entry 
llvm-svn: 28419
 2006-05-20 07:44:53 +00:00
Evan Cheng
95259a0f68 Missing break statements. 
llvm-svn: 28418
 2006-05-20 07:44:28 +00:00
Evan Cheng
550e73a900 Remove unused patterns. 
llvm-svn: 28417
 2006-05-20 01:40:16 +00:00
Evan Cheng
c68ea538e7 Handle indirect call which folds a load manually. This never matches by 
the TableGen generated code since the load's chain result is read by
the callseq_start node.

llvm-svn: 28416
 2006-05-20 01:36:52 +00:00
Owen Anderson
b2ac706286 Sparc is big-endian. 
llvm-svn: 28415
 2006-05-20 00:49:30 +00:00
Owen Anderson
c6947bf2ce Make all of the TargetMachine subclasses use the new string TargetData methods. 
This is part of the on-going work on PR 761.

llvm-svn: 28414
 2006-05-20 00:24:56 +00:00
Chris Lattner
54a41cdf6f new testcase for csretcc 
llvm-svn: 28413
 2006-05-19 22:00:54 +00:00
Chris Lattner
7a3f5267c0 Print csretcc calls like this: 
call csretcc void %structret( { sbyte }* %P )

instead of this:

        callcsretcc  void %structret( { sbyte }* %P )

llvm-svn: 28412
 2006-05-19 21:58:52 +00:00
Chris Lattner
91a82b1152 Fix misencoding of calling conventions 
llvm-svn: 28411
 2006-05-19 21:57:37 +00:00
Chris Lattner
b0af1b89ac pretty print csretcc for calls 
llvm-svn: 28410
 2006-05-19 21:54:03 +00:00
Chris Lattner
6d6a4d0e49 CSRet allows varargs 
llvm-svn: 28409
 2006-05-19 21:34:04 +00:00
Chris Lattner
bb961fb9d8 Asmprint csret nicely 
llvm-svn: 28408
 2006-05-19 21:29:57 +00:00
Chris Lattner
c4de187e4d Regenerate 
llvm-svn: 28407
 2006-05-19 21:28:53 +00:00
Chris Lattner
eb18e81992 Add support for parsing csret 
llvm-svn: 28406
 2006-05-19 21:28:34 +00:00
Chris Lattner
cf73ab6b7c csret functions can be varargs (as can target cc's). Verify restrictions on 
csret functions.

llvm-svn: 28405
 2006-05-19 21:25:17 +00:00
Chris Lattner
65503c4552 Add new calling convention, as documented in LangRef.html 
llvm-svn: 28404
 2006-05-19 21:19:02 +00:00
Chris Lattner
48febe01d9 New calling convention I will be adding shortly. 
llvm-svn: 28403
 2006-05-19 21:15:36 +00:00
Chris Lattner
ec58aa014f Add a note 
llvm-svn: 28402
 2006-05-19 21:01:38 +00:00
Chris Lattner
6ab04ce0cd Add a note 
llvm-svn: 28401
 2006-05-19 20:55:31 +00:00
Chris Lattner
49a93a0ec9 Split the SSE readme items out into their own README. 
llvm-svn: 28400
 2006-05-19 20:51:43 +00:00
Chris Lattner
95b6519d62 Split FP-stack notes out of the main readme. Next up: splitting out SSE. 
llvm-svn: 28399
 2006-05-19 20:45:52 +00:00
Chris Lattner
9c8f608215 Move a target-independent note out of the X86 readme. 
llvm-svn: 28398
 2006-05-19 20:45:08 +00:00
Chris Lattner
c29ff5f8b1 Particularly ugly code. 
llvm-svn: 28397
 2006-05-19 19:41:33 +00:00
Chris Lattner
055ad7974b new testcase 
llvm-svn: 28396
 2006-05-19 19:34:09 +00:00
Reid Spencer
8d035f492c Fix a doxygen problem and break lines at 80 columns 
llvm-svn: 28395
 2006-05-19 19:09:46 +00:00
Reid Spencer
55df120f95 Fix some doxygen usage in these headers. 
llvm-svn: 28394
 2006-05-19 19:07:54 +00:00
Evan Cheng
fb2038985a These can be transformed into lea as well. Not that we use this feature 
currently...

llvm-svn: 28393
 2006-05-19 18:43:41 +00:00
Evan Cheng
3a90665f14 - Use exact-width integer types, e.g. int32_t, to avoid confusion. 
- Fix a couple of minor bugs in i16immSExt8 and i16immZExt8.
- Added loadiPTR fragment used for indirect jumps and calls.

llvm-svn: 28392
 2006-05-19 18:40:54 +00:00
Chris Lattner
fce3b3f299 Use class tags instead of struct tags. The coding standards specify this 
for public classes for improved win32 compatibility.

llvm-svn: 28391
 2006-05-19 17:17:12 +00:00
Evan Cheng
ff19d6478e Explicitly specify MOV32mi can only be used store 32-bit GV, etc. 
llvm-svn: 28390
 2006-05-19 07:30:36 +00:00
Evan Cheng
accb9d0378 Now that iPTR is a fully resolved type. We end up losing the type check for 
patterns that look like this:

def : Pat<(i32 (X86Wrapper tconstpool  :$dst)), (MOV32ri tconstpool  :$dst)>;

InsertOneTypeCheck should copy the type from the resolved pattern to the
unresolved one as long as there types are different.

llvm-svn: 28389
 2006-05-19 07:24:32 +00:00
Rafael Espindola
a0e82ff9be implement movri 
add a stub LowerFORMAL_ARGUMENTS

llvm-svn: 28388
 2006-05-18 21:45:49 +00:00