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cd78a0e385
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23412 Commits

Author SHA1 Message Date
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
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
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
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
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
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
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
cba32609d2 Cosmetic. 
llvm-svn: 52450
 2008-06-18 07:47:28 +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
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
Devang Patel
8f157a3670 Preserve dominance frontier while trivially unswitching loop. 
llvm-svn: 52438
 2008-06-18 02:16:38 +00:00
Dan Gohman
c190d65454 Auto-upgrade code for multiple-value return statements. This code 
isn't actually called yet.

llvm-svn: 52435
 2008-06-17 23:38:43 +00:00
Dan Gohman
d9d529d7ed In InsertValueInst's copy ctor, actually copy the operands. 
llvm-svn: 52434
 2008-06-17 23:25:49 +00:00
Owen Anderson
c1ac0c1c41 We don't want to find dependencies within the same block in this case. It leads to incorrect results because 
we're detecting something at or after the call we're querying on.

llvm-svn: 52433
 2008-06-17 22:27:06 +00:00
Dan Gohman
24d9c8400f Implement the ExtractValueInst::getIndexedType that accepts one 
index value.

llvm-svn: 52432
 2008-06-17 21:07:55 +00:00
Evan Cheng
10ead77866 Live-through live interval is [mbb start, mbb end+1]. 
llvm-svn: 52431
 2008-06-17 20:13:36 +00:00
Evan Cheng
3dc2cfe366 When extending a liveinterval by commuting, don't throw away the live ranges that are not affected. 
llvm-svn: 52430
 2008-06-17 20:11:16 +00:00
Ted Kremenek
a9f1f1db52 Consistently set "Buckets[NumBuckets] = reinterpret_cast<void*>(-1)" throughout FoldingSet.cpp. 
llvm-svn: 52425
 2008-06-17 19:12:43 +00:00
Owen Anderson
79605db969 Add an insertBefore method for attaching previously unattached instructions, 
such as those created by clone(), to a basic block.

llvm-svn: 52424
 2008-06-17 18:29:27 +00:00
Evan Cheng
acd28b95da It's not safe to remove SUBREG_TO_REG that looks like identity copies, e.g. movl %eax, %eax on x86-64 actually does a zero-extend. 
llvm-svn: 52421
 2008-06-17 17:59:16 +00:00
Anton Korobeynikov
6a779ad6fa Add one more 'magic' define :) 
llvm-svn: 52420
 2008-06-17 17:57:43 +00:00
Anton Korobeynikov
cdfbb1eae5 Unbreak non-PPC builds 
llvm-svn: 52419
 2008-06-17 17:38:31 +00:00
Anton Korobeynikov
5b04f6d658 Provide generic hooks for icache invalidation. Add PPC implementation. 
Patch by Gary Benson!

llvm-svn: 52418
 2008-06-17 17:30:05 +00:00
Chris Lattner
4be2e72cc5 revert recent patch which is causing widespread breakage. 
llvm-svn: 52415
 2008-06-17 17:06:43 +00:00
Evan Cheng
d43a533365 Don't forget to initialize SymbolSearchingDisabled. 
llvm-svn: 52414
 2008-06-17 16:49:02 +00:00
Duncan Sands
ec220a7c48 Fix typo that changed the logic to something wrong. 
Spotted by Nick Lewycky.

llvm-svn: 52411
 2008-06-17 15:55:30 +00:00
Duncan Sands
ae9d876e69 Split type expansion into ExpandInteger and ExpandFloat 
rather than bundling them together.  Rename FloatToInt
to PromoteFloat (better, if not perfect).  Reorganize
files by types rather than by operations.

llvm-svn: 52408
 2008-06-17 14:27:01 +00:00
Matthijs Kooijman
dd32cb58b5 Learn IPConstProp to propagate arguments that are directly returned. Strictly 
speaking these are not constant values. However, when a function always returns
one of its arguments, then from the point of view of each caller the return
value is constant (or at least a known value) and can be replaced.

llvm-svn: 52397
 2008-06-17 12:20:24 +00:00
Matthijs Kooijman
f0adaf34a1 Learn IPConstProp to look at individual return values and propagate them 
individually.

Also learn IPConstProp how returning first class aggregates work, in addition
to old style multiple return instructions.

Modify the return-constants testscase to confirm this behaviour.

llvm-svn: 52396
 2008-06-17 12:02:52 +00:00
Matthijs Kooijman
dd18157e57 Use a SmallVector instead of an array, since auto_ptr doesn't handle arrays 
properly.

llvm-svn: 52390
 2008-06-17 08:24:37 +00:00
Chris Lattner
f461cca6b7 add a new -enable-value-prop flag for llcbeta, that enables propagation 
of value info (sign/zero ext info) from one MBB to another.  This doesn't
handle much right now because of two limitations:

1) only handles zext/sext, not random bit propagation (no assert exists 
   for this)
2) doesn't handle phis.

llvm-svn: 52383
 2008-06-17 06:09:18 +00:00
Duncan Sands
915b66e08b Fix spelling. 
llvm-svn: 52381
 2008-06-17 03:24:13 +00:00