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21199 Commits

Author SHA1 Message Date
Duncan Sands
fd975e4b3d 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
b8489f09a2 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
Chris Lattner
5489888580 rename isStore -> mayStore to more accurately reflect what it captures. 
llvm-svn: 45656
 2008-01-06 08:36:04 +00:00
Duncan Sands
63b3355183 Remove an unused variable. 
llvm-svn: 45655
 2008-01-06 07:43:13 +00:00
Chris Lattner
8b4b75c771 Change the 'isStore' inferrer to look for 'SDNPMayStore' 
instead of "ISD::STORE".  This allows us to mark target-specific dag
nodes as storing (such as ppc byteswap stores).  This allows us to remove
more explicit isStore flags from the .td files.

Finally, add a warning for when a .td file contains an explicit 
isStore and tblgen is able to infer it.

llvm-svn: 45654
 2008-01-06 06:44:58 +00:00
Chris Lattner
2bb919b542 remove explicit isStore flags that are now inferrable. 
llvm-svn: 45653
 2008-01-06 05:55:01 +00:00
Chris Lattner
9f8735181f remove some isStore flags that are now inferred automatically. 
llvm-svn: 45652
 2008-01-06 05:53:26 +00:00
Bill Wendling
703a1fc174 Fix comment. 
llvm-svn: 45638
 2008-01-05 23:30:51 +00:00
Chris Lattner
60aa495a41 make this build with newer gcc's 
llvm-svn: 45637
 2008-01-05 23:29:51 +00:00
Nate Begeman
ff49dc59ff Remove an incorrect optimization that is performed correctly by 
the target independent legalizer.

llvm-svn: 45631
 2008-01-05 20:51:30 +00:00
Nate Begeman
a6e9de35ae If custom lowering of insert element fails, the result Val will be 0. 
Don't overwrite a variable used by the fallthrough code path in this
case.

llvm-svn: 45630
 2008-01-05 20:47:37 +00:00
Chris Lattner
9f51583a6a Fix build issue on certain compilers. 
llvm-svn: 45629
 2008-01-05 20:15:42 +00:00
Gordon Henriksen
f4e137838b Refactoring the x86 and x86-64 calling convention implementations, 
unifying the copied algorithms and saving over 500 LOC. There should
be no functionality change, but please test on your favorite x86
target.

llvm-svn: 45627
 2008-01-05 16:56:59 +00:00
Bill Wendling
ecf0f85985 Chris and Evan noticed that this check was compleatly fubared. I was 
checking that there was a from a global instead of a load from the stub
for a global, which is the one that's safe to hoist.

Consider this program:

volatile char G[100];
int B(char *F, int N) {
  for (; N > 0; --N)
    F[N] = G[N];
}

In static mode, we shouldn't be hoisting the load from G:

$ llc -relocation-model=static -o - a.bc -march=x86 -machine-licm

LBB1_1: # bb.preheader
        leal    -1(%eax), %edx
        testl   %edx, %edx
        movl    $1, %edx
        cmovns  %eax, %edx
        xorl    %esi, %esi
LBB1_2: # bb
        movb    _G(%eax), %bl
        movb    %bl, (%ecx,%eax)

llvm-svn: 45626
 2008-01-05 09:18:04 +00:00
Chris Lattner
0d444b96ac The current impl is really trivial, add some comments about how it can be made better. 
llvm-svn: 45625
 2008-01-05 06:47:58 +00:00
Chris Lattner
9428a7d97f allow sinking to be enabled for the jit 
llvm-svn: 45624
 2008-01-05 06:14:16 +00:00
Chris Lattner
f1493e7b58 enable sinking and licm of loads from the argument area. I'd like to enable this 
for remat, but can't due to an RA bug.

llvm-svn: 45623
 2008-01-05 06:10:42 +00:00
Chris Lattner
aad6c09a14 simplify some code by using shorter accessors. 
llvm-svn: 45622
 2008-01-05 05:28:30 +00:00
Chris Lattner
6e948ea2e6 revert my previous patch. 
llvm-svn: 45621
 2008-01-05 05:26:26 +00:00
Chris Lattner
86ca5928b5 factor some code better to avoid redundancy between 
isReallySideEffectFree and isReallyTriviallyReMaterializable.  Why is a load from
a global considered side-effect-free but not rematable?

llvm-svn: 45620
 2008-01-05 05:19:56 +00:00
Chris Lattner
6ad8e32f6b getting the pic base has no side effects. 
llvm-svn: 45618
 2008-01-05 03:54:32 +00:00
Chris Lattner
9e7943159e don't sink anything with side effects, this makes lots of stuff work, but sinks almost nothing. 
llvm-svn: 45617
 2008-01-05 02:33:22 +00:00
Evan Cheng
759f389846 X86 JIT PIC jumptable support. 
llvm-svn: 45616
 2008-01-05 02:26:58 +00:00
Chris Lattner
377c720459 fix a common crash. 
llvm-svn: 45614
 2008-01-05 01:39:17 +00:00
Chris Lattner
7e1c3aa702 remove a couple more unsafe xforms in the face of overflow. 
llvm-svn: 45613
 2008-01-05 01:22:42 +00:00
Chris Lattner
983697dfac remove the (x-y) < 0 comparison xform, it miscompiles 
things that are not equality comparisons, for example:
   (2147479553+4096)-2147479553 < 0    !=   (2147479553+4096) < 2147479553

llvm-svn: 45612
 2008-01-05 01:18:20 +00:00
Owen Anderson
8c8c5906f8 I should not be allowed to commit when sleepy. 
llvm-svn: 45608
 2008-01-05 00:48:55 +00:00
Evan Cheng
5b9282f3b5 Combine MovePCtoStack + POP32r into one instruction MOVPC32r so it can be moved if needed. 
llvm-svn: 45605
 2008-01-05 00:41:47 +00:00
Owen Anderson
2adf8c5533 Move some more functionality from MRegisterInfo to TargetInstrInfo. 
llvm-svn: 45603
 2008-01-04 23:57:37 +00:00
Bill Wendling
93556af6c4 Don't recalculate the loop info and loop dominators analyses if they're 
preserved.

llvm-svn: 45596
 2008-01-04 20:54:55 +00:00
Wojciech Matyjewicz
9ec15f974f fix typo 
llvm-svn: 45594
 2008-01-04 20:02:18 +00:00
Evan Cheng
6dbcca7903 Unbreak tailcall opt in JIT. 
llvm-svn: 45576
 2008-01-04 10:50:28 +00:00
Evan Cheng
7322e4dec4 X86 PIC JIT support fixes: encoding bugs, add lazy pointer stubs support. 
llvm-svn: 45575
 2008-01-04 10:46:51 +00:00
Bill Wendling
4f3a9df125 80-column violations. 
llvm-svn: 45574
 2008-01-04 08:59:18 +00:00
Bill Wendling
2017097bb8 Add that this preserves some analyses. 
llvm-svn: 45573
 2008-01-04 08:48:49 +00:00
Bill Wendling
13eb1bfc08 Move option to enable machine LICM into LLVMTargetMachine.cpp. 
llvm-svn: 45572
 2008-01-04 08:11:03 +00:00
Bill Wendling
da5d32e248 Call the parent's getAnalysisUsage. 
llvm-svn: 45571
 2008-01-04 07:50:05 +00:00
Chris Lattner
f4972fa569 Add a really quick hack at a machine code sinking pass, enabled with --enable-sinking. 
It is missing validity checks, so it is known broken.  However, it is powerful enough
to compile this contrived code:

void test1(int C, double A, double B, double *P) {
  double Tmp = A*A+B*B;
  *P = C ? Tmp : A;
}

into:

_test1:
	movsd	8(%esp), %xmm0
	cmpl	$0, 4(%esp)
	je	LBB1_2	# entry
LBB1_1:	# entry
	movsd	16(%esp), %xmm1
	mulsd	%xmm1, %xmm1
	mulsd	%xmm0, %xmm0
	addsd	%xmm1, %xmm0
LBB1_2:	# entry
	movl	24(%esp), %eax
	movsd	%xmm0, (%eax)
	ret

instead of:

_test1:
	movsd	16(%esp), %xmm0
	mulsd	%xmm0, %xmm0
	movsd	8(%esp), %xmm1
	movapd	%xmm1, %xmm2
	mulsd	%xmm2, %xmm2
	addsd	%xmm0, %xmm2
	cmpl	$0, 4(%esp)
	je	LBB1_2	# entry
LBB1_1:	# entry
	movapd	%xmm2, %xmm1
LBB1_2:	# entry
	movl	24(%esp), %eax
	movsd	%xmm1, (%eax)
	ret

woo.

llvm-svn: 45570
 2008-01-04 07:36:53 +00:00
Chris Lattner
b02b90a8f6 remove dead #includes and reorder the rest. 
llvm-svn: 45569
 2008-01-04 06:41:45 +00:00
Chris Lattner
d4c66656a1 Fix PR1896 
llvm-svn: 45568
 2008-01-04 05:04:53 +00:00
Evan Cheng
627a9455a6 Correct order of parameters. 
llvm-svn: 45562
 2008-01-04 02:22:21 +00:00
Chris Lattner
40f17611cc Remove symbols that don't exist, remove tabs, fix comment typo 
llvm-svn: 45553
 2008-01-03 22:15:32 +00:00
Gordon Henriksen
d3af8e0ab3 First steps in in X86 calling convention cleanup. 
llvm-svn: 45536
 2008-01-03 16:47:34 +00:00
Chris Lattner
26b89fd30a 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
Chris Lattner
a27cc48cbc Fix PR1873, a problem finding stat-related symbols on linux, due to 
"libc_nonshared.a". Patch by Edwin Török!

llvm-svn: 45532
 2008-01-03 07:10:51 +00:00
Gordon Henriksen
8e4ae9a345 Trying that again. 
llvm-svn: 45529
 2008-01-03 03:32:33 +00:00
Gordon Henriksen
b28803a63f Fix a compile error on Windows. 
llvm-svn: 45528
 2008-01-03 03:21:18 +00:00
Evan Cheng
fb2bc4fc95 Change MachineRelocation::DoesntNeedFnStub to NeedStub. This fields will be used 
for non-function GV relocations that require function address stubs (e.g. Mac OS X in non-static mode).

llvm-svn: 45527
 2008-01-03 02:56:28 +00:00
Chris Lattner
c613164542 Remove the function attr cache for intrinsics. This does not maintain the 
refcount on these correctly, and can end up referring to deleted 
attributes.  This fixes PR1881.

llvm-svn: 45525
 2008-01-03 01:20:12 +00:00
Chris Lattner
e54252e6e1 Don't create a new ParamAttrsList (which copies the vector) just to 
get a profile.

llvm-svn: 45524
 2008-01-03 00:29:27 +00:00