Chris Lattner
925451e020
rewrite a big chunk of how DSE does recursive dead operand
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elimination to use more modern infrastructure. Also do a bunch
of small cleanups.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60201 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 00:27:14 +00:00
Mikhail Glushenkov
bfdef3a6b2
Scrap some boilerplate.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60200 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 00:14:11 +00:00
Mikhail Glushenkov
ad746beb64
Support multiple compilation graph definitions. Not terribly useful, but makes the code more generic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60199 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 00:13:47 +00:00
Mikhail Glushenkov
739c720e66
Add 'hidden' and 'really_hidden' option properties.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60198 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 00:13:25 +00:00
Mikhail Glushenkov
3321b0ff24
Documentation: clarify what is meant by 'multiple edges'.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60197 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28 00:12:09 +00:00
Chris Lattner
9fd4955c6a
delete ErasePossiblyDeadInstructionTree, replacing uses of it with
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RecursivelyDeleteTriviallyDeadInstructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60196 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 23:25:44 +00:00
Chris Lattner
1363949380
Simplify LoopStrengthReduce::DeleteTriviallyDeadInstructions by
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making it use RecursivelyDeleteTriviallyDeadInstructions to do
the heavy lifting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60195 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 23:23:35 +00:00
Chris Lattner
564c0a2330
enhance RecursivelyDeleteTriviallyDeadInstructions to make
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PHIs dead if they are single-value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60194 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 23:18:11 +00:00
Chris Lattner
4f02c74a8e
Enhance RecursivelyDeleteTriviallyDeadInstructions to optionally
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return a list of deleted instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60193 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 23:14:34 +00:00
Chris Lattner
a0d4486073
use continue to reduce indentation
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60192 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 23:00:20 +00:00
Chris Lattner
3481f24c06
remove doConstantPropagation and dceInstruction, they are just
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wrappers around the interesting code and use an obscure iterator
abstraction that dates back many many years.
Move EraseDeadInstructions to Transforms/Utils and name it
RecursivelyDeleteTriviallyDeadInstructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60191 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 22:57:53 +00:00
Chris Lattner
15678533f3
simplify code.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60190 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 22:56:14 +00:00
Chris Lattner
cb03f8547d
simplify this logic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60189 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 22:46:09 +00:00
Nick Lewycky
d2f0db1b19
Also update the README.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60188 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 22:41:45 +00:00
Nick Lewycky
8ca5248522
Chris prefers icmp/select over udiv!
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60187 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 22:41:10 +00:00
Nick Lewycky
df563ca1f3
Add a synthetic missed optimization.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60186 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 22:12:22 +00:00
Nick Lewycky
895f085385
Add a couple of missed optimizations on integer vectors. Multiply and divide
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by 1, as well as multiply by -1.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60182 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 20:21:08 +00:00
Chris Lattner
9918fb5631
defensive patch: if CGP is merging a block with the entry block, make sure
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it ends up being the entry block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60180 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 19:29:14 +00:00
Chris Lattner
3d86d242c6
Fix PR3138: if we merge the entry block into another block, make sure to
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move the other block back up into the entry position!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60179 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 19:25:19 +00:00
Nick Lewycky
a89d102b32
Silence a warning.
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Despite changing the order of evaluation, this doesn't actually change the
meaning of the statement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60177 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 17:29:52 +00:00
Nuno Lopes
440954c64b
fix build on some machines. thanks buildbot
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60175 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 16:42:44 +00:00
Nuno Lopes
4ba9aac839
fix my previous commit r60064: compare strings instead of pointers
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60174 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 16:37:02 +00:00
Chris Lattner
4aebaee0e4
switch InstCombine::visitLoadInst to use
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FindAvailableLoadedValue
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60169 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 08:56:30 +00:00
Chris Lattner
e3a0884ddf
improve const correctness.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60168 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 08:39:18 +00:00
Chris Lattner
ee6e10bc8e
enhance FindAvailableLoadedValue to make use of AliasAnalysis
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if it has it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60167 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 08:18:12 +00:00
Chris Lattner
52c95856b4
move FindAvailableLoadedValue from JumpThreading to Transforms/Utils.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60166 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 08:10:05 +00:00
Bill Wendling
b7c0d94465
Get rid of bogus "control may reach end of non-void function ‘...’ being
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inlined" message.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60165 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 08:00:12 +00:00
Chris Lattner
5a5c9a5acd
simplify this code a bit.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60164 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 07:54:38 +00:00
Chris Lattner
3c4f8b91ef
Use the new MergeBasicBlockIntoOnlyPred function.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60163 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 07:54:12 +00:00
Chris Lattner
b29714a10a
move MergeBasicBlockIntoOnlyPred to Transforms/Utils.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60162 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 07:43:12 +00:00
Bill Wendling
753e3ba5a6
XFAil test due to reverting of patch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60161 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 07:34:10 +00:00
Chris Lattner
c7bcbf6903
rename ThreadBlock to ProcessBlock, since it does other things than
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just simple threading.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60157 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 07:20:04 +00:00
Bill Wendling
109872e360
Comment out code that isn't entirely correct.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60156 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 07:18:35 +00:00
Misha Brukman
b0a57aa893
Fixed HTML closing tag, cleaned up some spacing.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60153 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 06:41:20 +00:00
Sanjiv Gupta
9b0f0b5e15
Removing redundant semicolons. No functionality change.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60149 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 05:58:04 +00:00
Chris Lattner
69e067fdd8
Make jump threading substantially more powerful, in the following ways:
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1. Make it fold blocks separated by an unconditional branch. This enables
jump threading to see a broader scope.
2. Make jump threading able to eliminate locally redundant loads when they
feed the branch condition of a block. This frequently occurs due to
reg2mem running.
3. Make jump threading able to eliminate *partially redundant* loads when
they feed the branch condition of a block. This is common in code with
lots of loads and stores like C++ code and 255.vortex.
This implements thread-loads.ll and rdar://6402033.
Per the fixme's, several pieces of this should be moved into Transforms/Utils.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60148 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 05:07:53 +00:00
Evan Cheng
dc52cf48dc
Eliminate a compile time warning.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60145 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 02:29:25 +00:00
Evan Cheng
df90841690
Avoid inserting noop's in the middle of a loop.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60141 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 01:16:00 +00:00
Evan Cheng
884c70c912
On x86 favors folding short immediate into some arithmetic operations (e.g. add, and, xor, etc.) because materializing an immediate in a register is expensive in turns of code size.
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e.g.
movl 4(%esp), %eax
addl $4, %eax
is 2 bytes shorter than
movl $4, %eax
addl 4(%esp), %eax
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60139 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 00:49:46 +00:00
Dale Johannesen
56eca9103e
Add a missing case in visitADD.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60137 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 00:43:21 +00:00
Evan Cheng
bc7e0f5dd6
Add -march=x86.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60135 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 00:37:06 +00:00
Ted Kremenek
9f1f00ab1b
Add typedef to StringMapEntry.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60134 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-27 00:17:25 +00:00
Mikhail Glushenkov
7e6d70a425
Disallow multiple edges.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60127 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 22:59:45 +00:00
Bill Wendling
e21815f41b
Add x86-specific test for add-with-overflow intrinsics.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60125 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 22:42:19 +00:00
Bill Wendling
3fafd93560
Generate something sensible for an [SU]ADDO op when the overflow/carry flag is
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the conditional for the BRCOND statement. For instance, it will generate:
addl %eax, %ecx
jo LOF
instead of
addl %eax, %ecx
; About 10 instructions to compare the signs of LHS, RHS, and sum.
jl LOF
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60123 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 22:37:40 +00:00
Chris Lattner
ab8b794a78
Turn on my codegen prepare heuristic by default. It doesn't affect
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performance in most cases on the Grawp tester, but does speed some
things up (like shootout/hash by 15%). This also doesn't impact
compile time in a noticable way on the Grawp tester.
It also, of course, gets the testcase it was designed for right :)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60120 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 22:16:44 +00:00
Bill Wendling
baa39d8664
Small formatting change.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60113 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 19:19:05 +00:00
Bill Wendling
fbaa7edf93
Update to explain how ssp and sspreq attributes override each other.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60112 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 19:07:40 +00:00
Devang Patel
da278753c4
Fix typo.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60111 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 18:13:11 +00:00
Evan Cheng
07213cb4b7
Cosmetic.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60110 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-26 18:00:00 +00:00