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23441 Commits

Author SHA1 Message Date
Dan Gohman
fcc6f11fc3 Tidy up some commments and use the getAggregateOperand and 
getInsertedValueOperand accessors. Thanks Matthijs!

llvm-svn: 52543
 2008-06-20 16:41:17 +00:00
Dan Gohman
3968f90c4c Fix the conditions under which SCCP should examine insertvalue 
instructions. Thanks to Matthijs Kooijman for pointing this out!

llvm-svn: 52542
 2008-06-20 16:39:44 +00:00
Matthijs Kooijman
54efc9f60e 80 column and trailing whitespace fixes. 
llvm-svn: 52539
 2008-06-20 15:34:07 +00:00
Matthijs Kooijman
7a75a306ff Don't let DeadArgumentElimination attempt to update callers when the return 
type wasn't changed.

llvm-svn: 52538
 2008-06-20 15:25:43 +00:00
Matthijs Kooijman
9a9a6f1122 Don't let DeadArgElimination change the return type ({} into void and {T} 
into T) when no return values are actually dead.

llvm-svn: 52537
 2008-06-20 15:16:45 +00:00
Matthijs Kooijman
1d019c28b3 Explicitely track if any arguments or return values were removed in 
DeadArgumentElimination and assert that the function type does not change if
nothing was changed. This should catch subtle changes in function type that are
not intended.

llvm-svn: 52536
 2008-06-20 14:28:52 +00:00
Matthijs Kooijman
35ac78c162 Remove debug output. 
llvm-svn: 52535
 2008-06-20 14:03:35 +00:00
Matthijs Kooijman
a3222e3730 Recommit r52459, rewriting of the dead argument elimination pass. 
This is a fixed version that no longer uses multimap::equal_range, which
resulted in a pointer invalidation problem.

Also, DAE::InspectedFunctions was not really necessary, so it got removed.

Lastly, this version no longer applies the extra arg hack on functions who did
not have any arguments to start with.

llvm-svn: 52532
 2008-06-20 09:36:16 +00:00
Owen Anderson
5213d215e0 Really disable PRE. 
llvm-svn: 52531
 2008-06-20 08:59:13 +00:00
Chris Lattner
9ab7735924 Fix an error handling redefinition of linkonce functions where the 
types differ.  Patch by Nathan Keynes!

llvm-svn: 52527
 2008-06-20 05:29:39 +00:00
Chris Lattner
e588f546c5 Fix PR2471, which is a bug involving an invalid promotion from a conditional load. 
llvm-svn: 52525
 2008-06-20 05:12:56 +00:00
Gordon Henriksen
50ca4ebe97 Add C binding for ExecutionEngine::addGlobalMapping. 
llvm-svn: 52523
 2008-06-20 02:16:11 +00:00
Dan Gohman
359de5a04e Teach ReturnInst lowering about aggregate return values. 
llvm-svn: 52522
 2008-06-20 01:29:26 +00:00
Owen Anderson
3231e506cb Change around the data structures used to store availability sets, resulting in a GVN+PRE that is faster that GVN alone was before. 
llvm-svn: 52521
 2008-06-20 01:15:47 +00:00
Dan Gohman
b4ee9dfc2d Teach SCCP about insertvalue and extractvalue, and about 
propagating constants across aggregate return values when
insertvalue and extractvalue are used.

llvm-svn: 52520
 2008-06-20 01:15:44 +00:00
Dan Gohman
029d1e045e Teach InlineFunction how to differentiate between multiple-value 
return statements and aggregate returns so that it handles both
correctly.

llvm-svn: 52519
 2008-06-20 01:03:44 +00:00
Evan Cheng
d4c055e1f8 Disable PRE for now. It seems to be breaking llvm-gcc bootstrapping. 
llvm-svn: 52518
 2008-06-20 01:01:07 +00:00
Dan Gohman
0d86d31373 Fix the index calculations for the extractvalue lowering code. 
llvm-svn: 52517
 2008-06-20 00:54:19 +00:00
Dan Gohman
826ad19523 Simplify the ComputeLinearIndex logic and fix a few bugs. 
llvm-svn: 52516
 2008-06-20 00:53:00 +00:00
Dan Gohman
bcddb92f4e Simplify this code. Thanks Chris! 
llvm-svn: 52514
 2008-06-20 00:47:44 +00:00
Evan Cheng
4006f4cdf0 ISD::UNDEF should be expanded recursively / iteratively. 
llvm-svn: 52508
 2008-06-19 22:01:11 +00:00
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
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