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3152 Commits

Author SHA1 Message Date
Chris Lattner
d5dd4590b5 reimplement AliasSetTracker in terms of DenseMap instead of hash_map, 
hopefully no functionality change.

llvm-svn: 66398
 2009-03-09 05:11:09 +00:00
Chris Lattner
f05ebf0849 teach SROA to handle promoting vector allocas with a memset into them into 
a vector type instead of into an integer type.

llvm-svn: 66368
 2009-03-08 04:17:04 +00:00
Chris Lattner
54d2292fe5 Enhance SROA to "promote to scalar" allocas which are 
memcpy/memmove'd into or out of.  This fixes a serious
perf issue that Nate ran into.

llvm-svn: 66366
 2009-03-08 04:04:21 +00:00
Chris Lattner
e367477979 change the MemIntrinsic get/setAlignment method to take an unsigned 
instead of a Constant*, which is what the clients of it really want.

llvm-svn: 66364
 2009-03-08 03:59:00 +00:00
Chris Lattner
f827ae4fa5 Introduce a new MemTransferInst pseudo class, which is a common 
parent between MemCpyInst and MemMoveInst, simplify some code to
use it.

llvm-svn: 66361
 2009-03-08 03:37:16 +00:00
Chris Lattner
c5dba8954e add a bunch more passes to the C bindings (PR3734), patch by 
Lennart Augustsson!

llvm-svn: 66272
 2009-03-06 16:52:18 +00:00
Devang Patel
12e9aa7629 While converting an aggregate to scalare, ignore and remove aggregate's debug info. 
llvm-svn: 66262
 2009-03-06 07:03:54 +00:00
Chris Lattner
a66675581a this wasn't intended to go in. 
llvm-svn: 66252
 2009-03-06 05:42:30 +00:00
Chris Lattner
1b05680d5f Change various llvm utilities to use PrettyStackTraceProgram in 
their main routines.  This makes the tools print their argc/argv
commands if they crash.

llvm-svn: 66248
 2009-03-06 05:34:10 +00:00
Devang Patel
ff51ec061c Do not count DbgInfoIntrinsic while estimating loop header size. 
llvm-svn: 66245
 2009-03-06 03:51:30 +00:00
Devang Patel
9abfbc2e14 Skip DbgInfoIntrinsic. 
llvm-svn: 66244
 2009-03-06 02:59:27 +00:00
Dale Johannesen
e07f7b0e3d Don't assign rank numbers to debug intrinsic "calls". 
This is needed so debug info doesn't change codegen.

llvm-svn: 66235
 2009-03-06 01:41:59 +00:00
Evan Cheng
918955bbc4 SRThreshold is meant to be inclusive. 
llvm-svn: 66227
 2009-03-06 00:56:43 +00:00
Evan Cheng
24c138a1cd Do not split edges to EH landing pads. It will cause code size explosion. 
llvm-svn: 66140
 2009-03-05 06:31:26 +00:00
Dale Johannesen
a73a4ee680 Fix another case where debug info was affecting 
codegen.  I convinced myself it was OK to skip all
pointer bitcasts here too.

llvm-svn: 66122
 2009-03-05 02:06:48 +00:00
Bill Wendling
edc936acb4 Add comment to emphasize that the while body is empty. 
llvm-svn: 66115
 2009-03-05 01:08:35 +00:00
Dale Johannesen
428972ecad Fix another case where a dbg.declare meant something 
had 2 uses instead of 1.

llvm-svn: 66112
 2009-03-05 00:39:02 +00:00
Dale Johannesen
448293322b Re-commit 65975 and a fix for the problem that 
was causing llvm-gcc to fail to build.  I've
verified it bootstraps now; good enough for me.

llvm-svn: 66073
 2009-03-04 21:24:04 +00:00
Dan Gohman
5eb18fa0bf Fix this comment. 
llvm-svn: 66065
 2009-03-04 20:50:23 +00:00
Dan Gohman
70fd52251c Add an assertion for a condition that's always true, and not 
immediately obvious.

llvm-svn: 66062
 2009-03-04 20:49:01 +00:00
Chris Lattner
9cfff838eb complete comment. 
llvm-svn: 66055
 2009-03-04 19:23:25 +00:00
Chris Lattner
a0d9cc96fe this wasn't intended to be committed. 
llvm-svn: 66054
 2009-03-04 19:22:30 +00:00
Chris Lattner
5051e7afde Fix PR3720 by properly propagating alignment information from memcpy/memmove 
onto element accesses.

llvm-svn: 66053
 2009-03-04 19:20:50 +00:00
Dale Johannesen
e184480072 Always skip ptr-to-ptr bitcasts when counting, 
per Chris' suggestion.  Slightly faster.

llvm-svn: 65999
 2009-03-04 01:53:05 +00:00
Dale Johannesen
a6f7a45366 Make my earlier patch to skip debug intrinsics 
when counting work; it was only off by 1.

llvm-svn: 65993
 2009-03-04 01:20:34 +00:00
Dale Johannesen
81b6cd8ce5 Instruction counters must skip the bitcasts that 
feed into llvm.dbg.declare nodes, as well as
the debug directives themselves.

llvm-svn: 65976
 2009-03-03 22:36:47 +00:00
Dale Johannesen
ceed180d4c When removing a store to an alloca that has only one 
use, check also for the case where it has two uses,
the other being a llvm.dbg.declare.  This is needed so
debug info doesn't affect codegen.

llvm-svn: 65970
 2009-03-03 21:26:39 +00:00
Bill Wendling
8244b700bf Use > instead of >=. We want to promote aggregates of 128-bytes. 
llvm-svn: 65960
 2009-03-03 19:18:49 +00:00
Bill Wendling
a77bedb70b Reapply r65755, but reversing "<" to ">=". 
llvm-svn: 65945
 2009-03-03 12:12:58 +00:00
Dan Gohman
51d4e8db6a Fix a bunch of Doxygen syntax issues. Escape special characters, 
and put @file directives on their own comment line.

llvm-svn: 65920
 2009-03-03 02:55:14 +00:00
Dale Johannesen
d4a205b300 Don't count DebugInfo instructions in another limit 
(lest they affect codegen).

llvm-svn: 65915
 2009-03-03 01:43:03 +00:00
Dale Johannesen
33fa9dc8a9 When sinking an insn in InstCombine bring its debug 
info with it.
Don't count debug info insns against the scan maximum
in FindAvailableLoadedValue (lest they affect codegen).

llvm-svn: 65910
 2009-03-03 01:09:07 +00:00
Devang Patel
e98e6bc27c If branch conditions' one successor is dominating another non-latch successor then this loop's iteration space can not be restricted. In this example block bb5 is always executed. 
llvm-svn: 65902
 2009-03-02 23:39:14 +00:00
Duncan Sands
51ce06c788 Fix PR3694: add an instcombine micro-optimization that helps 
clean up when using variable length arrays in llvm-gcc.

llvm-svn: 65832
 2009-03-02 09:18:21 +00:00
Bill Wendling
0dd6d44518 Temporarily revert r65755. It was causing failures in the self-hosting 
testsuite:

Running /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvmCore/test/CodeGen/X86/dg.exp ...
FAIL: /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvmCore/test/CodeGen/X86/nancvt.ll
Failed with exit(1) at line 2
while running: grep 2147027116 nancvt.ll.tmp | count 3
count: expected 3 lines and got        0.
child process exited abnormally
FAIL: /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvmCore/test/CodeGen/X86/vec_ins_extract.ll
Failed with exit(1) at line 1
while running:  llvm-as < /Volumes/Sandbox/Buildbot/llvm/full-llvm/build/llvmCore/test/CodeGen/X86/vec_ins_extract.ll |  opt -scalarrepl -instcombine |   llc -march=x86 -mcpu=yonah | not /usr/bin/grep sub.*esp
      subl      $28, %esp
      subl      $28, %esp
child process exited abnormally

And more.

llvm-svn: 65758
 2009-03-01 03:55:12 +00:00
Chris Lattner
7228db7662 hoist the check for alloca size up so that it controls CanConvertToScalar 
as well as isSafeAllocaToScalarRepl.

llvm-svn: 65755
 2009-03-01 02:26:47 +00:00
Nick Lewycky
44b8675102 Silence compiler warning about use of uninitialized variables (in reality these 
are always set by reference on the path that uses them.) No functional change.

llvm-svn: 65621
 2009-02-27 06:37:39 +00:00
Chris Lattner
1443cb8f77 Fix PR3667 
llvm-svn: 65464
 2009-02-25 18:20:01 +00:00
Dan Gohman
dd9c79d45b Rename ScalarEvolution's getIterationCount to getBackedgeTakenCount, 
to more accurately describe what it does. Expand its doxygen comment
to describe what the backedge-taken count is and how it differs
from the actual iteration count of the loop. Adjust names and
comments in associated code accordingly.

llvm-svn: 65382
 2009-02-24 18:55:53 +00:00
Dan Gohman
1197d46ccf Fix a ValueTracking rule: RHS means operand 1, not 0. Add a simple 
ashr instcombine to help expose this code. And apply the fix to
SelectionDAG's copy of this code too.

llvm-svn: 65364
 2009-02-24 02:00:40 +00:00
Dan Gohman
f5bb2d8747 Generalize the ChangeCompareStride code, in preparation for 
handling non-constant strides. No functionality change.

llvm-svn: 65363
 2009-02-24 01:58:00 +00:00
Dan Gohman
3a3b51162b Preserve the DominanceFrontier analysis in the LoopDeletion pass. 
llvm-svn: 65359
 2009-02-24 01:21:53 +00:00
Dan Gohman
1d93a1d2cb Back out the change in 64918 that used sign-extensions when promoting 
trip counts that use signed comparisons. It's not obviously the best
approach for preserving trip count information, and at any rate there
isn't anything in the tree right now that makes use of that, so for
now always using zero-extensions is preferable.

llvm-svn: 65347
 2009-02-23 23:20:35 +00:00
Dan Gohman
f7d0d6fe22 LoopDeletion needs to inform ScalarEvolution when a loop is deleted, 
so that ScalarEvolution doesn't hang onto a dangling Loop*, which
could be a problem if another Loop happens to get allocated at the
same address.

llvm-svn: 65323
 2009-02-23 17:10:29 +00:00
Dan Gohman
67530bbc77 IndVarSimplify preserves ScalarEvolution. In the 
-std-compile-opts sequence, this avoids the need for ScalarEvolution to
be rerun before LoopDeletion.

llvm-svn: 65318
 2009-02-23 16:29:41 +00:00
Zhou Sheng
d3008c8b1c Should reset DBI_Prev if DBI_Next == 0. 
llvm-svn: 65314
 2009-02-23 10:14:11 +00:00
Chris Lattner
29437eb4c3 fix some typos that Duncan noticed 
llvm-svn: 65306
 2009-02-23 05:56:17 +00:00
Dan Gohman
b105ab4e42 Revert the part of 64623 that attempted to align the source in a 
memcpy to match the alignment of the destination. It isn't necessary
for making loads and stores handled like the SSE loadu/storeu
intrinsics, and it was causing a performance regression in
MultiSource/Applications/JM/lencod.

The problem appears to have been a memcpy that copies from some
highly aligned array into an alloca; the alloca was then being
assigned a large alignment, which required codegen to perform
dynamic stack-pointer re-alignment, which forced the enclosing
function to have a frame pointer, which led to increased spilling.

llvm-svn: 65289
 2009-02-22 18:06:32 +00:00
Dan Gohman
a78fb41553 Properly parenthesize this expression, fixing a real bug in the new 
-full-lsr code, as well as a GCC warning.

llvm-svn: 65288
 2009-02-22 16:40:52 +00:00
Evan Cheng
ba3f6fa814 Only try to sink immediate when TLI is not null. It needs to check if immediate would fit in target addressing field. 
llvm-svn: 65268
 2009-02-22 07:31:19 +00:00