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Author SHA1 Message Date
Chris Lattner
15678533f3 simplify code. 
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. 
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. 
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! 
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. 
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 
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 
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 
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. 
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 
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 
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 
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. 
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 
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. 
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 
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. 
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. 
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. 
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. 
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 
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. 
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. 
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. 
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: 
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. 
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. 
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. 
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. 
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. 
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. 
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. 
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. 
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 
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 
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. 
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. 
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. 
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. 
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
Duncan Sands
af7852f094 Check that running the DAG combiner between type 
and operation legalization does something useful.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60108 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 16:44:30 +00:00
Mikhail Glushenkov
dbb61d1bac Describe some more options in the man page. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60105 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 13:40:08 +00:00
Nuno Lopes
3cef088484 ignore build dirs and generated files 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60104 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 13:10:39 +00:00
Sanjiv Gupta
d3f01aa5a1 Allow custom lowering of ADDE/ADDC/SUBE/SUBC operations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60102 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 11:19:00 +00:00
Mikhail Glushenkov
1f1fab8c91 Fix the -I option (llvmc -I dir1 -I dir2 didn't work). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60101 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 10:57:31 +00:00
Mikhail Glushenkov
8b4c5f5d26 Refactor Tools.td to remove repetition. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60100 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 10:56:56 +00:00
Mikhail Glushenkov
3acc921b26 Small fix: the error message was incorrect in some cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60099 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 10:55:45 +00:00
Sanjiv Gupta
8f78fa827e Emit declaration for globals and externs. 
Custom lower AND, OR, XOR bitwise operations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60098 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 10:53:50 +00:00
Dan Gohman
25a1b47cc3 Fish kill flag annotations in PUSH instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60095 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 06:39:12 +00:00
Dan Gohman
2ad8245566 LiveRanges are represented as half-open ranges. Fix the findLiveInMBBs code 
and the LiveInterval.h top-level comment and accordingly. This fixes blocks
having spurious live-in registers in boundary cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60092 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 05:50:31 +00:00
Chris Lattner
695d8ec33b teach the new heuristic how to handle inline asm. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60088 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 04:59:11 +00:00