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20534 Commits

Author SHA1 Message Date
Evan Cheng
5fe81cf64e Enable more fold (sext (load x)) -> (sext (truncate (sextload x))) 
transformation. Previously, it's restricted by ensuring the number of load uses
is one. Now the restriction is loosened up by allowing setcc uses to be
"extended" (e.g. setcc x, c, eq -> setcc sext(x), sext(c), eq).

llvm-svn: 43465
 2007-10-29 19:58:20 +00:00
Dan Gohman
65be3b6502 Add explicit keywords. 
llvm-svn: 43464
 2007-10-29 19:52:04 +00:00
Dan Gohman
a309c59972 Update a comment to reflect the current code. 
llvm-svn: 43463
 2007-10-29 19:32:39 +00:00
Dan Gohman
459bb8cbd2 Remove an unused function argument. 
llvm-svn: 43462
 2007-10-29 19:31:25 +00:00
Dan Gohman
30b8bd2ad4 Fix a typo in a comment. 
llvm-svn: 43461
 2007-10-29 19:26:14 +00:00
Dan Gohman
957fd1704a Avoid calling ValidStride when not all uses are addresses. 
llvm-svn: 43460
 2007-10-29 19:23:53 +00:00
Ted Kremenek
4f7fd889e1 Fixed warning concerning implicit conversion from a NULL pointer 
constant to an unsigned int.  We now just directly assign the literal 0.

llvm-svn: 43459
 2007-10-29 18:43:39 +00:00
Evan Cheng
1113931fd8 Avoid doing something dumb like rewriting using a 64-bit iv in 32-bit mode. 
llvm-svn: 43446
 2007-10-29 07:57:50 +00:00
Chris Lattner
be8379fac5 add a note. 
llvm-svn: 43444
 2007-10-29 06:19:48 +00:00
Chris Lattner
1659eb3c3f I am not sure this is a good idea to be an option, but rename the option for 
now.  It conflicts with clang's -pedantic flag.

llvm-svn: 43431
 2007-10-29 03:14:55 +00:00
Chris Lattner
1503362624 Add support for the x86-64 'q' regigster modifier, and add support for the 
b/h/w/k/q inline asm memory modifiers, which are just ignored.  This fixes
PR1748 and CodeGen/X86/2007-10-28-inlineasm-q-modifier.ll

llvm-svn: 43430
 2007-10-29 03:09:07 +00:00
Chris Lattner
7e3a8a7604 Fix PR1749 and InstCombine/2007-10-28-EmptyField.ll by handling 
zero-length fields better.

llvm-svn: 43427
 2007-10-29 02:40:02 +00:00
Chris Lattner
891066cfff Fix PR1752 and LoopSimplify/2007-10-28-InvokeCrash.ll: terminators 
can have uses too.  Wouldn't it be nice if invoke didn't exist? :)

llvm-svn: 43426
 2007-10-29 02:30:37 +00:00
Ted Kremenek
3ad324488b Fixed assertion in Deserializer::~Deserializer that checks for 
pointers that were not backpatched (previously checked the wrong invariant).

llvm-svn: 43425
 2007-10-28 23:38:38 +00:00
Anton Korobeynikov
ab0c5f6d32 Add 'pedantic' mode to verifier rejecting syntactically valid, but 'bad' due to other reasons code 
llvm-svn: 43424
 2007-10-28 22:50:32 +00:00
Ted Kremenek
27c96e0d86 Updated backpatching logic during object deserialization to perform 
eager backpatching instead of waithing until all objects have been
deserialized.  This allows us to reduce the memory footprint needed
for backpatching.

llvm-svn: 43422
 2007-10-28 21:17:59 +00:00
Duncan Sands
b494fb97a4 The guaranteed alignment of ptr+offset is only the minimum of 
of offset and the alignment of ptr if these are both powers of
2.  While the ptr alignment is guaranteed to be a power of 2,
there is no reason to think that offset is.  For example, if
offset is 12 (the size of a long double on x86-32 linux) and
the alignment of ptr is 8, then the alignment of ptr+offset
will in general be 4, not 8.  Introduce a function MinAlign,
lifted from gcc, for computing the minimum guaranteed alignment.
I've tried to fix up everywhere under lib/CodeGen/SelectionDAG/.
I also changed some places that weren't wrong (because both values
were a power of 2), as a defensive change against people copying
and pasting the code.
Hopefully someone who cares about alignment will review the rest
of LLVM and fix up the remaining places.  Since I'm on x86 I'm
not very motivated to do this myself...

llvm-svn: 43421
 2007-10-28 12:59:45 +00:00
Evan Cheng
053178440a New entry. 
llvm-svn: 43420
 2007-10-28 04:01:09 +00:00
Evan Cheng
c8adcda731 A number of LSR fixes: 
- ChangeCompareStride only reuse stride that is larger than current stride. It
  will let the general reuse mechanism to try to reuse a smaller stride.
- Watch out for multiplication overflow in ChangeCompareStride.
- Replace std::set with SmallPtrSet.

llvm-svn: 43408
 2007-10-26 23:08:19 +00:00
Ted Kremenek
3f3b4818ef Added serialization support for APInt. 
llvm-svn: 43405
 2007-10-26 21:50:10 +00:00
Bill Wendling
8d329ff809 - Remove the hacky code that forces a memcpy. Alignment is taken care of in the 
FE.
- Explicitly pass in the alignment of the load & store.
- XFAIL 2007-10-23-UnalignedMemcpy.ll because llc has a bug that crashes on
  unaligned pointers.

llvm-svn: 43398
 2007-10-26 20:24:42 +00:00
Evan Cheng
53b2e7f3ca Fix a crash. Make sure TLI is not null. 
llvm-svn: 43384
 2007-10-26 17:24:46 +00:00
Anton Korobeynikov
0d3f43480e Fix off-by-one stack offset computations (dwarf information) for callee-saved 
registers in case, when FP pointer was eliminated. This should fixes misc. random
EH-related crahses, when stuff is compiled with -fomit-frame-pointer.
Thanks Duncan for nailing this bug!

llvm-svn: 43381
 2007-10-26 09:13:24 +00:00
Eric Christopher
82c77dd85b clo/clz aren't supported on mips I. Keep them around for when we'll 
want them later (mips32/64).

llvm-svn: 43380
 2007-10-26 04:00:13 +00:00
Owen Anderson
8bf547855a Make a comment better. 
llvm-svn: 43379
 2007-10-26 03:47:14 +00:00
Gordon Henriksen
609997aa7d More fleshing out of docs/Passes.html, plus some typo fixes and 
improved wording in source files.

llvm-svn: 43377
 2007-10-26 03:03:51 +00:00
Evan Cheng
53696b7e9f Loosen up iv reuse to allow reuse of the same stride but a larger type when truncating from the larger type to smaller type is free. 
e.g.
Turns this loop:
LBB1_1: # entry.bb_crit_edge
        xorl    %ecx, %ecx
        xorw    %dx, %dx
        movw    %dx, %si
LBB1_2: # bb
        movl    L_X$non_lazy_ptr, %edi
        movw    %si, (%edi)
        movl    L_Y$non_lazy_ptr, %edi
        movw    %dx, (%edi)
		addw    $4, %dx
		incw    %si
		incl    %ecx
		cmpl    %eax, %ecx
		jne     LBB1_2  # bb
	
into

LBB1_1: # entry.bb_crit_edge
        xorl    %ecx, %ecx
        xorw    %dx, %dx
LBB1_2: # bb
        movl    L_X$non_lazy_ptr, %esi
        movw    %cx, (%esi)
        movl    L_Y$non_lazy_ptr, %esi
        movw    %dx, (%esi)
        addw    $4, %dx
		incl    %ecx
        cmpl    %eax, %ecx
        jne     LBB1_2  # bb

llvm-svn: 43375
 2007-10-26 01:56:11 +00:00
Hartmut Kaiser
d57d01b8e0 Silenced a VC++ warning. 
llvm-svn: 43374
 2007-10-25 23:49:14 +00:00
Ted Kremenek
2bfb73a3f4 Updated backpatching during object deserialization to support "smart" 
pointers that employ unused bits in a pointer to store extra data.

llvm-svn: 43373
 2007-10-25 23:40:35 +00:00
Hartmut Kaiser
48b3098b43 Clarified operator precedence. 
Silenced VC++ warning.

llvm-svn: 43372
 2007-10-25 23:15:31 +00:00
Hartmut Kaiser
8b605b5578 Disambiguated variable name to comply with VC++'s archaic variable scoping rules. 
llvm-svn: 43369
 2007-10-25 22:57:48 +00:00
Evan Cheng
d7eab3a984 Do not rewrite compare instruction using iv of a different stride if the new 
stride may be rewritten using the stride of the compare instruction.

llvm-svn: 43367
 2007-10-25 22:45:20 +00:00
Dale Johannesen
0774a9c549 Support non-POSIX hosts by removing use of strncasecmp. 
llvm-svn: 43364
 2007-10-25 21:54:43 +00:00
Bill Wendling
27f7cac311 Changed XXX to FIXME, and added comment to the README file 
llvm-svn: 43359
 2007-10-25 19:49:32 +00:00
Ted Kremenek
d29fe31fcd Added special treatment of serializing NULL pointers. 
llvm-svn: 43357
 2007-10-25 18:42:52 +00:00
Evan Cheng
c25c4276a6 Remove code that's commented out. 
llvm-svn: 43356
 2007-10-25 18:38:24 +00:00
Bill Wendling
34d5118422 Added comment explaining why we are doing this check. 
llvm-svn: 43353
 2007-10-25 18:23:45 +00:00
Duncan Sands
fcfc9fdd5c Small formatting changes. Add a sanity check. 
Use NVT rather than looking it up, since we have
it to hand.

llvm-svn: 43341
 2007-10-25 12:35:51 +00:00
Duncan Sands
15f9f7d669 Promote SETCC operands. 
llvm-svn: 43340
 2007-10-25 12:32:31 +00:00
Duncan Sands
28582a76eb Correctly extract the ValueType from a VTSDNode. 
llvm-svn: 43339
 2007-10-25 12:30:51 +00:00
Evan Cheng
66cbf54030 If a loop termination compare instruction is the only use of its stride, 
and the compaison is against a constant value, try eliminate the stride
by moving the compare instruction to another stride and change its
constant operand accordingly. e.g.

loop:
...
v1 = v1 + 3
v2 = v2 + 1
if (v2 < 10) goto loop
=>
loop:
...
v1 = v1 + 3
if (v1 < 30) goto loop

llvm-svn: 43336
 2007-10-25 09:11:16 +00:00
Owen Anderson
6cc4e90741 Fix for PR1741. 
llvm-svn: 43326
 2007-10-25 02:36:18 +00:00
Ted Kremenek
195382dce2 Implemented prototype serialization of pointers, including support 
for backpatching.

Added Deserialize::ReadVal.

llvm-svn: 43319
 2007-10-25 00:10:21 +00:00
Dale Johannesen
53ca1384b0 Another expansion for i64 multiply, suitable for PPC. 
llvm-svn: 43314
 2007-10-24 22:26:08 +00:00
Dale Johannesen
414ad5d4a4 Fix off by 1 bug in printf->puts lowering. 
llvm-svn: 43309
 2007-10-24 20:14:50 +00:00
Ted Kremenek
b3085f2d74 Split Serialization.h into separate headers: Serialize.h and 
Deserialize.h Serialization.h now includes trait speciailizations for
unsigned long, etc.

llvm-svn: 43307
 2007-10-24 19:06:40 +00:00
Chris Lattner
ae9cfd2fb0 simplify some code by using the new isNaN predicate 
llvm-svn: 43305
 2007-10-24 18:54:45 +00:00
Chris Lattner
483c471daa Implement a couple of foldings for ordered and unordered comparisons, 
implementing cases related to PR1738.

llvm-svn: 43289
 2007-10-24 05:38:08 +00:00
Bill Wendling
e5f534148e Fix comment and use the "Size" variable that's already provided. 
llvm-svn: 43271
 2007-10-23 23:36:57 +00:00
Bill Wendling
a420d660c8 If there's an unaligned memcpy to/from the stack, don't lower it. Just call the 
memcpy library function instead.

llvm-svn: 43270
 2007-10-23 23:32:40 +00:00