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Author SHA1 Message Date
Owen Anderson
c979fcf8ff Add a hidden -disable-pre flag for testing purposes. This should be removed 
once benchmarking is completed.

llvm-svn: 52506
 2008-06-19 19:57:25 +00:00
Owen Anderson
35fb8dbfef PRE requires that critical edges be split. 
llvm-svn: 52505
 2008-06-19 19:54:19 +00:00
Bill Wendling
68bdf9f6d4 Remove dead code causing a warning. 
llvm-svn: 52502
 2008-06-19 18:00:44 +00:00
Dan Gohman
98d028eb42 Use the common API for adding instructions to basic blocks instead of 
using BasicBlock::getInstList.

llvm-svn: 52500
 2008-06-19 17:53:32 +00:00
Owen Anderson
87d761460e Be sure to remove values from the value numbering table after we delete them. 
This fixes a failure on povray.

llvm-svn: 52499
 2008-06-19 17:53:26 +00:00
Dan Gohman
a18aa3f3a2 Use Instruction::moveBefore instead of manipulating the instruction list 
directly.

llvm-svn: 52498
 2008-06-19 17:47:47 +00:00
Dan Gohman
01679b25c0 Avoid using BasicBlock::getInstList directly in a few places. 
llvm-svn: 52497
 2008-06-19 17:37:25 +00:00
Owen Anderson
aa850d32db Revert support for insertvalue and extractvalue instructions for the moment. 
GVN expects that all inputs which to an instruction fall somewhere in the value
hierarchy, which isn't true for these.

llvm-svn: 52496
 2008-06-19 17:25:39 +00:00
Dan Gohman
cd78a0e385 Use the transferSuccessors helper function. 
llvm-svn: 52495
 2008-06-19 17:22:29 +00:00
Dan Gohman
68c5bdd4f5 Delete dead code. 
llvm-svn: 52494
 2008-06-19 17:18:39 +00:00
Owen Anderson
5eeafbc3f7 Add an idx_iterator to the insertvalue and extractvalue instructions. 
llvm-svn: 52493
 2008-06-19 17:15:57 +00:00
Dan Gohman
42e4ecff62 The inline keyword goes before the return type. This fixes a compiler warning. 
llvm-svn: 52492
 2008-06-19 16:16:06 +00:00
Matthijs Kooijman
343ce1868f Modify some ipconstprop tests to also test with invokes. 
llvm-svn: 52491
 2008-06-19 09:27:44 +00:00
Matthijs Kooijman
41c5b9a77c Use a CallSite to find the nth argument of a call/invoke instruction instead of 
using getOperand() directly. This makes things work with invoke instructions as
well.

llvm-svn: 52489
 2008-06-19 08:53:24 +00:00
Duncan Sands
054b82d555 Fix some warnings reported by gcc-4.3. Hopefully 
this still compiles on windows - I can't test!

llvm-svn: 52488
 2008-06-19 08:47:31 +00:00
Evan Cheng
b12290e31b Missed a check. 
llvm-svn: 52487
 2008-06-19 06:17:19 +00:00
Eli Friedman
570aa6f801 Fix a bug with <8 x i16> shuffle lowering on X86 where parts of the 
shuffle could be skipped.  The check is invalid because the loop index i 
doesn't correspond to the element actually inserted. The correct check is
already done a few lines earlier, for whether the element is already in 
the right spot, so this shouldn't have any effect on the codegen for 
code that was already correct.

llvm-svn: 52486
 2008-06-19 06:09:51 +00:00
Owen Anderson
864a2c23ed Revert my last patch, which was causing regression test failures. 
llvm-svn: 52485
 2008-06-19 05:29:34 +00:00
Evan Cheng
919b735586 New test case. 
llvm-svn: 52483
 2008-06-19 01:50:24 +00:00
Evan Cheng
ee801276b3 This also got better (55 - 51 instructions). But doing one more re-materialization. 
llvm-svn: 52482
 2008-06-19 01:50:13 +00:00
Evan Cheng
56e17b525c This got better. 
llvm-svn: 52481
 2008-06-19 01:46:43 +00:00
Evan Cheng
22b431d28f Coalesce copy from one register class to a sub register class. e.g. X86::MOV16to16_. 
llvm-svn: 52480
 2008-06-19 01:39:21 +00:00
Evan Cheng
f129d15d03 Cosmetic changes. 
llvm-svn: 52479
 2008-06-19 01:21:26 +00:00
Evan Cheng
4416f16a6a Unneeded include's. 
llvm-svn: 52478
 2008-06-19 01:21:02 +00:00
Evan Cheng
968679913e Minor spiller tweak to unfavor reload into load/store instructions. 
llvm-svn: 52477
 2008-06-19 01:16:17 +00:00
Owen Anderson
abbc43e493 Insert empty slots into the instruction numbering in live intervals, so that we can more easily 
add new instructions.

llvm-svn: 52475
 2008-06-19 00:10:49 +00:00
Owen Anderson
597b40ed60 Remove this test until the corresponding patch is reapplied because it's causing make check to crash for some people. 
llvm-svn: 52473
 2008-06-18 22:37:31 +00:00
Owen Anderson
5b8d39569b Add support for extractvalue and insertvalue instructions in GVN. 
llvm-svn: 52472
 2008-06-18 21:59:00 +00:00
Owen Anderson
3f78e260c1 Add local PRE to GVN. This only operates in cases where it would not increase code size, namely when the instantiated expression 
would only need to be created in one predecessor.

llvm-svn: 52471
 2008-06-18 21:41:49 +00:00
Bill Wendling
adf865a112 Refactor the way to get a string containing the features of the target. 
llvm-svn: 52470
 2008-06-18 21:39:02 +00:00
Argyrios Kyrtzidis
5ef6b9b977 Fix the source line debug information for the Windows platform. 
According to DWARF-2 specification, the line information is provided through an offset in the .debug_line section.
Replace the label reference that is used with a section offset.

llvm-svn: 52468
 2008-06-18 19:27:37 +00:00
Dan Gohman
db0beeefb1 Fix a missing comma spotted by Bram Geron. 
llvm-svn: 52467
 2008-06-18 18:42:13 +00:00
Chris Lattner
f9d9f0ec4c Fix the regressions on sext-misc.ll my patch yesterday caused. 
llvm-svn: 52466
 2008-06-18 18:11:55 +00:00
Owen Anderson
e680ac8dcb Revert r52459, which was causing an infinite loop or massive slowdown on MultiSource/Applications/SPASS, and possibly others as well. 
Please reapply once this is fixed.

llvm-svn: 52465
 2008-06-18 17:32:16 +00:00
Dan Gohman
606a60ad68 Move SCEVExpander::visitAddExpr out-of-line. 
llvm-svn: 52464
 2008-06-18 16:37:11 +00:00
Dan Gohman
82f9df016e Move LSR's private isZero function to a public SCEV member 
function, and make use of it in several places.

llvm-svn: 52463
 2008-06-18 16:23:07 +00:00
Gabor Greif
14dc959397 fix validator warning 
llvm-svn: 52461
 2008-06-18 14:05:31 +00:00
Gabor Greif
41d941a446 prettify, no semantic changes 
llvm-svn: 52460
 2008-06-18 13:44:57 +00:00
Matthijs Kooijman
b7e2818227 Rewrite the DeadArgumentElimination pass, to use a more explicit tracking of 
dependencies between return values and/or arguments. Also make the handling of
arguments and return values the same.

The pass now looks properly inside returned structs, but only at the first                                                                                     
level (ie, not inside nested structs).

Also add a testcase for testing various variations of (multiple) dead rerturn
values.

llvm-svn: 52459
 2008-06-18 11:12:53 +00:00
Matthijs Kooijman
8177832230 Reapply r52397 (make IPConstProp promote returned arguments), but fixed this 
time. Sorry for the trouble!

This time, also add a testcase, which I should have done in the first place...

llvm-svn: 52455
 2008-06-18 08:30:37 +00:00
Evan Cheng
0570953e28 XOR32rr, etc. are not AsCheapAsMove, but MOV32ri, etc. are. 
llvm-svn: 52454
 2008-06-18 08:13:07 +00:00
Matthijs Kooijman
bb59138fa6 Reapply r52396, it was unrelated to the breakage (that was caused by r52397, my 
commit after this).

llvm-svn: 52453
 2008-06-18 08:09:27 +00:00
Evan Cheng
ad0a4a31f8 Complete support for two-address pass rematerialization. Now *almost* always a win. 
llvm-svn: 52452
 2008-06-18 07:49:14 +00:00
Evan Cheng
e447be0532 Add MachineRegisterInfo::use_empty. 
llvm-svn: 52451
 2008-06-18 07:47:55 +00:00
Evan Cheng
cba32609d2 Cosmetic. 
llvm-svn: 52450
 2008-06-18 07:47:28 +00:00
Bill Wendling
c7a2b72a42 If compiling for PPC on an i386 box, the LTO wouldn't get the altivec (and 
other) feature information. The workaround is inelegant and could be cleaned up
if this information were available some other way (say, in the IR).

llvm-svn: 52447
 2008-06-18 06:35:30 +00:00
Chris Lattner
93da79f7a1 implement some simple bswap optimizations, rdar://5992453 
llvm-svn: 52442
 2008-06-18 04:33:20 +00:00
Chris Lattner
2a22e66e47 temporarily revert this testcase since its patch was reverted. 
llvm-svn: 52441
 2008-06-18 04:03:23 +00:00
Chris Lattner
7e403da191 make truncate/sext elimination capable of changing phi's. This 
implements rdar://6013816 and the testcase in Transforms/InstCombine/sext-misc.ll.

llvm-svn: 52440
 2008-06-18 04:00:49 +00:00
Evan Cheng
deb754898b Unbreak DECLARE isel in pic mode. 
llvm-svn: 52439
 2008-06-18 02:48:27 +00:00