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4623 Commits

Author SHA1 Message Date
Evan Cheng
0f8c7c4a73 Codegen improvement has reduced one spill. 
llvm-svn: 45814
 2008-01-10 02:54:40 +00:00
Chris Lattner
e34d7d0e24 new testcase for PR1845 
llvm-svn: 45795
 2008-01-10 00:30:38 +00:00
Evan Cheng
0e400d4cb7 Special copy SUnit's do not have SDNode's. 
llvm-svn: 45787
 2008-01-09 23:01:55 +00:00
Evan Cheng
a31824a08e Fix sse2.psrl.w and sse2.psrl.q definitions. 
llvm-svn: 45772
 2008-01-09 02:16:44 +00:00
Chris Lattner
51b01bf8a5 Make load->store deletion a bit smarter. This allows us to compile this: 
void test(long long *P) { *P ^= 1; }

into just:

_test:
	movl	4(%esp), %eax
	xorl	$1, (%eax)
	ret

instead of code like this:

_test:
	movl	4(%esp), %ecx
        xorl    $1, (%ecx)
	movl	4(%ecx), %edx
	movl	%edx, 4(%ecx)
	ret

llvm-svn: 45762
 2008-01-08 23:08:06 +00:00
Duncan Sands
7b1460cca4 Crashes llc when using Chris's new legalization logic. 
llvm-svn: 45758
 2008-01-08 21:51:53 +00:00
Chris Lattner
2940c5c56d Implement PR1795, an instcombine hack for forming GEPs with integer pointer arithmetic. 
llvm-svn: 45745
 2008-01-08 07:23:51 +00:00
Chris Lattner
b17db3afa8 remove darwin/i386 t-t 
llvm-svn: 45743
 2008-01-08 06:52:51 +00:00
Chris Lattner
89f36e6b21 Finally implement correct ordered comparisons for PPC, even though 
the code generated is not wonderful.  This turns a miscompilation into
a code quality bug (noted in the ppc readme).  This fixes PR642, which
is over 2 years old (!).  Nate, please review this.

llvm-svn: 45742
 2008-01-08 06:46:30 +00:00
Chris Lattner
184f79a5e1 Testcase for PR1721 
llvm-svn: 45739
 2008-01-08 05:16:29 +00:00
Nate Begeman
d3d49df3f1 Update test to catch recent x86 insert regression and improvements 
llvm-svn: 45705
 2008-01-07 17:49:23 +00:00
Gordon Henriksen
c7e991b7c3 Setting GlobalDirective in TargetAsmInfo by default rather than 
providing a misleading facility. It's used once in the MIPS backend
and hardcoded as "\t.globl\t" everywhere else.

llvm-svn: 45676
 2008-01-07 02:31:11 +00:00
Gordon Henriksen
6047b6e140 With this patch, the LowerGC transformation becomes the 
ShadowStackCollector, which additionally has reduced overhead with
no sacrifice in portability.

Considering a function @fun with 8 loop-local roots,
ShadowStackCollector introduces the following overhead
(x86):

; shadowstack prologue
        movl    L_llvm_gc_root_chain$non_lazy_ptr, %eax
        movl    (%eax), %ecx
        movl    $___gc_fun, 20(%esp)
        movl    $0, 24(%esp)
        movl    $0, 28(%esp)
        movl    $0, 32(%esp)
        movl    $0, 36(%esp)
        movl    $0, 40(%esp)
        movl    $0, 44(%esp)
        movl    $0, 48(%esp)
        movl    $0, 52(%esp)
        movl    %ecx, 16(%esp)
        leal    16(%esp), %ecx
        movl    %ecx, (%eax)

; shadowstack loop overhead
        (none)

; shadowstack epilogue
        movl    48(%esp), %edx
        movl    %edx, (%ecx)

; shadowstack metadata
        .align  3
___gc_fun:                              # __gc_fun
        .long   8
        .space  4

In comparison to LowerGC:

; lowergc prologue
        movl    L_llvm_gc_root_chain$non_lazy_ptr, %eax
        movl    (%eax), %ecx
        movl    %ecx, 48(%esp)
        movl    $8, 52(%esp)
        movl    $0, 60(%esp)
        movl    $0, 56(%esp)
        movl    $0, 68(%esp)
        movl    $0, 64(%esp)
        movl    $0, 76(%esp)
        movl    $0, 72(%esp)
        movl    $0, 84(%esp)
        movl    $0, 80(%esp)
        movl    $0, 92(%esp)
        movl    $0, 88(%esp)
        movl    $0, 100(%esp)
        movl    $0, 96(%esp)
        movl    $0, 108(%esp)
        movl    $0, 104(%esp)
        movl    $0, 116(%esp)
        movl    $0, 112(%esp)

; lowergc loop overhead
        leal    44(%esp), %eax
        movl    %eax, 56(%esp)
        leal    40(%esp), %eax
        movl    %eax, 64(%esp)
        leal    36(%esp), %eax
        movl    %eax, 72(%esp)
        leal    32(%esp), %eax
        movl    %eax, 80(%esp)
        leal    28(%esp), %eax
        movl    %eax, 88(%esp)
        leal    24(%esp), %eax
        movl    %eax, 96(%esp)
        leal    20(%esp), %eax
        movl    %eax, 104(%esp)
        leal    16(%esp), %eax
        movl    %eax, 112(%esp)

; lowergc epilogue
        movl    48(%esp), %edx
        movl    %edx, (%ecx)

; lowergc metadata
        (none)

llvm-svn: 45670
 2008-01-07 01:30:53 +00:00
Duncan Sands
404eb05247 The transform that tries to turn calls to bitcast functions into 
direct calls bails out unless caller and callee have essentially
equivalent parameter attributes.  This is illogical - the callee's
attributes should be of no relevance here.  Rework the logic, which
incidentally fixes a crash when removed arguments have attributes.

llvm-svn: 45658
 2008-01-06 18:27:01 +00:00
Duncan Sands
55e5090fe8 When transforming a call to a bitcast function into 
a direct call with cast parameters and cast return
value (if any), instcombine was prepared to cast any
non-void return value into any other, whether castable
or not.  Add a new predicate for testing whether casting
is valid, and check it both for the return value and
(as a cleanup) for the parameters.

llvm-svn: 45657
 2008-01-06 10:12:28 +00:00
Nick Lewycky
0e519bb555 Accept both %y, %x and %x, %y as valid answers. 
llvm-svn: 45649
 2008-01-06 03:12:44 +00:00
Chris Lattner
e666bc272d remove a couple more unsafe xforms in the face of overflow. 
llvm-svn: 45613
 2008-01-05 01:22:42 +00:00
Duncan Sands
d98c63ebb9 Testcase with non-integer "bitfields" (in quotes, 
since they didn't actually need to be bitfields,
though they are marked as such).

llvm-svn: 45588
 2008-01-04 17:31:56 +00:00
Duncan Sands
99fc7197f2 Testcase for PR1386. 
llvm-svn: 45583
 2008-01-04 13:15:39 +00:00
Chris Lattner
bdd6acfb59 Fix PR1896 
llvm-svn: 45568
 2008-01-04 05:04:53 +00:00
Duncan Sands
338b462b6f Test for handling of large bit offset from a 
variable field offset.

llvm-svn: 45534
 2008-01-03 11:53:52 +00:00
Chris Lattner
f391883670 don't hoist FP additions into unconditional adds + selects. This 
could theoretically introduce a trap, but is also a performance issue.
This speeds up ptrdist/ks by 8%.

llvm-svn: 45533
 2008-01-03 07:25:26 +00:00
Duncan Sands
a7f7ac7072 An example for which the TYPE_SIZE was being set from 
the initial value, while the type fields were not (this
is a qualified union type, so not all fields are always
present).  This resulted in the size of the corresponding
LLVM type being larger than the gcc TYPE_SIZE.

llvm-svn: 45522
 2008-01-03 00:26:42 +00:00
Duncan Sands
1d03fb4e7e Test handling of records for which the fields are 
not ordered by offset.

llvm-svn: 45520
 2008-01-03 00:17:02 +00:00
Chris Lattner
41e423a6f5 fix this to use a valid triple. 
llvm-svn: 45509
 2008-01-02 22:21:45 +00:00
Chris Lattner
5d998c5712 verify that aligned common support doesn't break. 
llvm-svn: 45495
 2008-01-02 19:48:24 +00:00
Bill Wendling
6f8c9a8372 Update this testcase. The output needs to be disabled to pass. 
llvm-svn: 45478
 2008-01-01 01:34:36 +00:00
Duncan Sands
57a60f0466 Fix PR1833 - eh.exception and eh.selector return two 
values, which means doing extra legalization work.
It would be easier to get this kind of thing right if
there was some documentation...

llvm-svn: 45472
 2007-12-31 18:35:50 +00:00
Gordon Henriksen
1862b6daa0 Another backwards compatibility fix. 
llvm-svn: 45463
 2007-12-30 22:48:58 +00:00
Gordon Henriksen
12c53c8c84 Strengthening this test so it fails in release mode. 
llvm-svn: 45446
 2007-12-30 05:45:49 +00:00
Gordon Henriksen
1158c533f7 Bindings for instruction calling conventions. 
llvm-svn: 45422
 2007-12-29 20:45:00 +00:00
Chris Lattner
11cc8b3c14 remove attributions from the rest of the llvm makefiles. 
llvm-svn: 45416
 2007-12-29 20:11:13 +00:00
Chris Lattner
d2b8a36f0e One readme entry is done, one is really easy (Evan, want to investigate 
eliminating the llvm.x86.sse2.loadl.pd intrinsic?), one shuffle optzn
may be done (if shufps is better than pinsw, Evan, please review), and
we already know about LICM of simple instructions.

llvm-svn: 45407
 2007-12-29 19:31:47 +00:00
Chris Lattner
0d90c8f016 upgrade this test 
llvm-svn: 45406
 2007-12-29 19:24:06 +00:00
Chris Lattner
3b6a82118b Fold comparisons against a constant nan, and optimize ORD/UNORD 
comparisons with a constant.  This allows us to compile isnan to:

_foo:
	fcmpu cr7, f1, f1
	mfcr r2
	rlwinm r3, r2, 0, 31, 31
	blr 

instead of:

LCPI1_0:					;  float
	.space	4
_foo:
	lis r2, ha16(LCPI1_0)
	lfs f0, lo16(LCPI1_0)(r2)
	fcmpu cr7, f1, f0
	mfcr r2
	rlwinm r3, r2, 0, 31, 31
	blr 

llvm-svn: 45405
 2007-12-29 08:37:08 +00:00
Chris Lattner
33de0c6e92 this xform is implemented. 
llvm-svn: 45404
 2007-12-29 08:19:39 +00:00
Chris Lattner
07ccbfa64a Codegen: 
as:

_bar:
	pushl	%esi
	subl	$8, %esp
	movl	16(%esp), %esi
	call	L_foo$stub
	fstps	(%esi)
	addl	$8, %esp
	popl	%esi
	#FP_REG_KILL
	ret

instead of:

_bar:
	pushl	%esi
	subl	$8, %esp
	movl	16(%esp), %esi
	call	L_foo$stub
	fstpl	(%esi)
	cvtsd2ss	(%esi), %xmm0
	movss	%xmm0, (%esi)
	addl	$8, %esp
	popl	%esi
	#FP_REG_KILL
	ret

llvm-svn: 45401
 2007-12-29 06:57:38 +00:00
Chris Lattner
8013bd339b avoid going through a stack slot to convert from fpstack to xmm reg 
if we are just going to store it back anyway.  This improves things 
like:
double foo();
void bar(double *P) { *P = foo(); }

llvm-svn: 45399
 2007-12-29 06:41:28 +00:00
Chris Lattner
e96658392d dead calls to llvm.stacksave can be deleted, even though they 
have potential side-effects.

llvm-svn: 45392
 2007-12-29 00:59:12 +00:00
Chris Lattner
bc03f70a07 upgrade this test 
llvm-svn: 45391
 2007-12-29 00:57:06 +00:00
Devang Patel
b57ff068cd Test -simplifycfg only. 
llvm-svn: 45389
 2007-12-28 22:59:48 +00:00
Owen Anderson
3de3f9981e Add a testcase for my recent InstCombine fix, written by Nicholas. 
llvm-svn: 45386
 2007-12-28 21:08:43 +00:00
Gordon Henriksen
05568bbd98 Adding bindings for target triple and data layout. 
llvm-svn: 45369
 2007-12-27 20:13:47 +00:00
Chris Lattner
bc13df19a8 one fewer uncond branch with my codegenprepare hack for single-mbb backedges. 
llvm-svn: 45360
 2007-12-26 17:23:47 +00:00
Gordon Henriksen
d89e645c38 Tests for changes made in r45356, where IPO optimizations would drop 
collector algorithms.

llvm-svn: 45357
 2007-12-26 02:47:37 +00:00
Gordon Henriksen
b969c5981b GC poses hazards to the inliner. Consider: 
define void @f() {
            ...
            call i32 @g()
            ...
    }

    define void @g() {
            ...
    }

The hazards are:

  - @f and @g have GC, but they differ GC. Inlining is invalid. This
    may never occur.
  - @f has no GC, but @g does. g's GC must be propagated to @f.

The other scenarios are safe:

  - @f and @g have the same GC.
  - @f and @g have no GC.
  - @g has no GC.

This patch adds inliner checks for the former two scenarios.

llvm-svn: 45351
 2007-12-25 03:10:07 +00:00
Gordon Henriksen
fb56bde933 Noting and enforcing that GC intrinsics are valid only within a 
function with GC.

This will catch the error when the inliner inlines a function with
GC into a caller with no GC.

llvm-svn: 45350
 2007-12-25 02:31:26 +00:00
Gordon Henriksen
9157c499fc Adjusting verification of "llvm.gc*" intrinsic prototypes to match 
LangRef.

llvm-svn: 45349
 2007-12-25 02:02:10 +00:00
Gordon Henriksen
2a8cd89d03 C and Ocaml bindings for ExecutionEngine (i.e., the JIT compiler). 
llvm-svn: 45335
 2007-12-23 16:59:28 +00:00
Gordon Henriksen
0c43064daf Fix a partial application typo. 
llvm-svn: 45317
 2007-12-22 19:41:30 +00:00