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Author SHA1 Message Date
Evan Cheng
4a0d47f209 Make use of imm12 version of Thumb2 ldr / str instructions more aggressively. 
llvm-svn: 85743
 2009-11-01 21:12:51 +00:00
Chris Lattner
dc9cf48396 fix two strange things in the default passmgr: 
1. we'd run simplifycfg at the very start, even though
the per function passes have already cleaned this up.

2. In the main per-function pipeline that is interlaced with inlining 
   etc, we would do instcombine, jump threading, simplifycfg *before*
   doing SROA.  SROA is much more likely to expose opportunities for
   these passes than they are for SROA, so move SRoA up earlier.

also add some comments.

llvm-svn: 85742
 2009-11-01 20:41:59 +00:00
Chris Lattner
326adfb172 merge phi-merge.ll into phi.ll 
I don't know what Dan wants to do with phi-merge-gep.ll, I'll let
him deal with it because instcombine may end up sinking these.

llvm-svn: 85739
 2009-11-01 20:10:11 +00:00
Chris Lattner
f3c2039dde when merging two loads, make sure to take the min of their alignment, 
not the max.  This didn't matter until the previous patch because
instcombine would refuse to sink loads with differenting alignments.

llvm-svn: 85738
 2009-11-01 20:07:07 +00:00
Chris Lattner
e7b1e067e9 split load sinking out to its own function, like gep sinking. 
llvm-svn: 85737
 2009-11-01 20:04:24 +00:00
Chris Lattner
b3fe1009a5 fix a bug noticed by inspection: when instcombine sinks loads through 
phis, it didn't preserve the alignment of the load.  This is a missed
optimization of the alignment is high and a miscompilation when the
alignment is low.

llvm-svn: 85736
 2009-11-01 19:50:13 +00:00
Chris Lattner
2db49d0a22 IPSCCP apparently is not a superset of IPCP, this is bad, 
but I'll investigate it separately.  This unbreaks 
test/FrontendC/weak_constant.c

llvm-svn: 85735
 2009-11-01 19:29:12 +00:00
Chris Lattner
c0f971670d convert to filecheck. 
llvm-svn: 85734
 2009-11-01 19:22:20 +00:00
Duncan Sands
555af234e6 Improve the other instance of the comment. 
llvm-svn: 85733
 2009-11-01 19:16:21 +00:00
Duncan Sands
fd3669403c Add a missing closing parenthesis, and tweak to fit in 80 
columns.

llvm-svn: 85732
 2009-11-01 19:12:43 +00:00
Chris Lattner
73fa16be5d only run GlobalDCE at -O3 and run it late instead of early. 
GlobalOpt already deletes trivially dead functions/globals,
so GlobalDCE only adds values for cycles of dead things.

llvm-svn: 85731
 2009-11-01 19:09:12 +00:00
Chris Lattner
888d78216f cleanups, switch GlobalDCE to SmallPtrSet instead of std::set 
llvm-svn: 85730
 2009-11-01 19:03:42 +00:00
Chris Lattner
69549467e3 We currently only run ipsccp at LTO time, which is silly. It subsumes 
ipconstprop and doesn't take much time.  Just run it in its place.

This adds a testcase for it, which I plan to expand to cover other
"integration" cases, where we expect the optimizer to be able to
eliminate various things.  Due to phase order issues we've regressed
in a number of areas and integration tests are the only way I see to
prevent this.

llvm-svn: 85729
 2009-11-01 18:57:49 +00:00
Chris Lattner
ad2926bbb4 remove a bunch of locking from LLVMContextImpl. Since only one thread 
can be banging on a context at a time, this isn't needed.  Owen, please
review.

llvm-svn: 85728
 2009-11-01 18:42:03 +00:00
Chris Lattner
02e43b65d1 improve comment. 
llvm-svn: 85725
 2009-11-01 18:17:37 +00:00
Chris Lattner
11944e39d4 add a comment about why we don't allow inlining indbr. 
llvm-svn: 85724
 2009-11-01 18:16:30 +00:00
Evan Cheng
0151329ce5 Fix tests. 
llvm-svn: 85723
 2009-11-01 18:13:29 +00:00
Chris Lattner
55a53e4e79 the verifier shouldn't modify the IR. 
llvm-svn: 85722
 2009-11-01 18:11:50 +00:00
Douglas Gregor
16c6819959 Reverting 85714, 85715, 85716, which are breaking the build 
llvm-svn: 85717
 2009-11-01 16:42:53 +00:00
Dan Gohman
58714b62b6 Add a function to Passes.h to allow clients to create instances 
of the ScalarEvolution pass without needing to #include ScalarEvolution.h.

llvm-svn: 85716
 2009-11-01 15:28:36 +00:00
Dan Gohman
9cdf5185a3 Don't #include Pass.h from CallGraph.h. 
llvm-svn: 85715
 2009-11-01 15:23:35 +00:00
Dan Gohman
1d0b06c139 Remove the #include of Pass.h from PassManager.h. This breaks a significant 
#include dependency, as frontends commonly pull in PassManager.h.

llvm-svn: 85714
 2009-11-01 15:20:19 +00:00
Chris Lattner
d8f9d01b76 teach ipsccp and ipconstprop that a blockaddress doesn't 'take the address' of a function 
in a way that should prevent ip constprop.  This allows clang/test/CodeGen/indirect-goto.c
to pass with the new indirect goto lowering.

llvm-svn: 85709
 2009-11-01 06:11:53 +00:00
Chris Lattner
c340ce422d change llvm::MergeBlockIntoPredecessor to not merge two blocks BB1->BB2 
when BB2 has its address taken.  Since it ends up doing BB2->rauw(BB1),
this can cause the address of the entry block to be taken.  Since it is
generally undesirable to nuke blocks whose address is taken, even when
we can, just unconditionally stop this xform.

llvm-svn: 85708
 2009-11-01 04:57:33 +00:00
Chris Lattner
746b4c0b20 strengthen an assumption: RevectorBlockTo knows that PredBB 
ended in an uncond branch because the pass requires BreakCriticalEdges.

However, BCE doesn't eliminate critical adges from indbrs.

llvm-svn: 85707
 2009-11-01 04:23:20 +00:00
Chris Lattner
baa216cd33 fix an issue where the verifier would reject a function whose entry 
block had its address taken even if the blockaddress was dead.

llvm-svn: 85706
 2009-11-01 04:08:01 +00:00
Chris Lattner
0ee6bbbeb1 if CostMetrics says to never duplicate some code, don't unswitch a loop. 
This prevents unswitching from duplicating indbr's.

llvm-svn: 85705
 2009-11-01 03:42:55 +00:00
Chris Lattner
e7dc33941b constant fold indirectbr(blockaddress(%bb)) -> br label %bb. 
llvm-svn: 85704
 2009-11-01 03:40:38 +00:00
Chris Lattner
4cf2980e59 improve x86 codegen support for blockaddress. We now compile 
the testcase into:

_test1:                                                     ## @test1
## BB#0:                                                    ## %entry
	leaq	L_test1_bb6(%rip), %rax
	jmpq	*%rax
L_test1_bb:                                                 ## Address Taken
LBB1_1:                                                     ## %bb
	movb	$1, %al
	ret
L_test1_bb6:                                                ## Address Taken
LBB1_2:                                                     ## %bb6
	movb	$2, %al
	ret

Note, it is very very strange that BlockAddressSDNode doesn't carry 
around TargetFlags.  Dan, please fix this.

llvm-svn: 85703
 2009-11-01 03:25:03 +00:00
Chris Lattner
7a60ef5e23 pull check for return inst out of loop, never inline a callee that contains 
an indirectbr.

llvm-svn: 85702
 2009-11-01 03:07:53 +00:00
Chris Lattner
6e87bdadb9 Fix BlockAddress::replaceUsesOfWithOnConstant to correctly 
maintain the block use count in SubclassData.

llvm-svn: 85701
 2009-11-01 03:03:03 +00:00
Chris Lattner
e3b5cc7fe6 implement linker support for BlockAddress. 
llvm-svn: 85700
 2009-11-01 02:46:39 +00:00
Chris Lattner
2bbe57b2b8 Revert 85678/85680. The decision is to stay with the current form of 
indirectbr, thus we don't need "blockaddr(@func, null)".  Eliminate it
for simplicity.

llvm-svn: 85699
 2009-11-01 01:27:45 +00:00
Evan Cheng
de16fff3e8 Use cbz and cbnz instructions. 
llvm-svn: 85698
 2009-10-31 23:46:45 +00:00
Jim Grosbach
5b094f3b36 vml[as].f32 cause stalls in following advanced SIMD instructions. Avoid using 
them for scalar floating point operations for now.

llvm-svn: 85697
 2009-10-31 22:57:36 +00:00
Jim Grosbach
7dfa53d978 Consolidate test files 
llvm-svn: 85696
 2009-10-31 22:20:56 +00:00
Jim Grosbach
acb31ebed1 Change to use FileCheck 
llvm-svn: 85695
 2009-10-31 22:16:14 +00:00
Jim Grosbach
93bcf7b8ce Make tests more explicit about which instructions are expected. 
llvm-svn: 85694
 2009-10-31 22:14:17 +00:00
Jim Grosbach
84e67e8e5c Grammar tweak to comments 
llvm-svn: 85693
 2009-10-31 22:12:44 +00:00
Chris Lattner
1f101c7a1a Make sure PRE doesn't split crit edges from indirectbr. 
llvm-svn: 85692
 2009-10-31 22:11:15 +00:00
Jim Grosbach
c003ed5615 Update test to be more explicit about what instruction sequences are expected for each operation. 
llvm-svn: 85691
 2009-10-31 22:10:38 +00:00
Chris Lattner
43591a021a llvm::SplitEdge should refuse to split an edge from an indirectbr. 
Fix CodeGenPrepare to not try to split edges from indirectbr.

llvm-svn: 85690
 2009-10-31 22:04:43 +00:00
Jim Grosbach
2a445e5d0a Update test to be more explicit about what instruction sequences are expected for each operation. 
llvm-svn: 85689
 2009-10-31 21:52:58 +00:00
Chris Lattner
ea1bebaa65 update the comment above llvm::SplitCriticalEdge, and make 
it abort on IndirectBrInst as describe in the comment.

llvm-svn: 85688
 2009-10-31 21:51:10 +00:00
Jim Grosbach
ace75c4288 Expand 64-bit logical shift right inline 
llvm-svn: 85687
 2009-10-31 21:42:19 +00:00
Jim Grosbach
16ae289667 Expand 64-bit arithmetic shift right inline 
llvm-svn: 85685
 2009-10-31 21:00:56 +00:00
Dan Gohman
423e97a5ad Fix a missing newline in the dwarf output code. 
llvm-svn: 85684
 2009-10-31 20:59:09 +00:00
Dan Gohman
a66239e39f Make -print-machineinstrs more readable. 
- Be consistent when referring to MachineBasicBlocks: BB#0.
 - Be consistent when referring to virtual registers: %reg1024.
 - Be consistent when referring to unknown physical registers: %physreg10.
 - Be consistent when referring to known physical registers: %RAX
 - Be consistent when referring to register 0: %reg0
 - Be consistent when printing alignments: align=16
 - Print jump table contents.
 - Don't print host addresses, in general.
 - and various other cleanups.

llvm-svn: 85682
 2009-10-31 20:19:03 +00:00
Dan Gohman
de460ebecb Factor out more code into addCommonCodeGenPasses. The JIT wasn't 
previously running CodePlacementOpt. Also print headers before
each dump in -print-machineinstrs mode, so that it's clear which
dump is which.

llvm-svn: 85681
 2009-10-31 20:17:39 +00:00
Chris Lattner
48de74645e adjust a couple xforms to work with null bb's in BlockAddress. 
llvm-svn: 85680
 2009-10-31 20:13:24 +00:00