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Author SHA1 Message Date
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
Devang Patel
6f9f3e1a18 Disable -loop-index-split for now. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60087 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 04:58:14 +00:00
Ted Kremenek
5984680c1f Add 'tell' method to raw_fd_ostream that clients can use to query the current location in the file the stream is writing to. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60085 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 03:33:13 +00:00
Chris Lattner
896617b776 Improve ValueAlreadyLiveAtInst with a cheap and dirty, but effective 
heuristic: the value is already live at the new memory operation if
it is used by some other instruction in the memop's block.  This is
cheap and simple to compute (moreso than full liveness).

This improves the new heuristic even more.  For example, it cuts two
out of three new instructions out of 255.vortex:DbmFileInGrpHdr, 
which is one of the functions that the heuristic regressed.  This
overall eliminates another 40 instructions from 403.gcc and visibly
reduces register pressure in 255.vortex (though this only actually
ends up saving the 2 instructions from the whole program).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60084 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 03:20:37 +00:00
Nick Lewycky
f9ef5b3ff5 __fastcall and __stdcall are mingw extensions to gcc for windows. Use the 
__attribute__ notation which is supported on more platforms.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60083 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 03:17:27 +00:00
Chris Lattner
84d1b40d44 Start rewroking a subpiece of the profitability heuristic to be 
phrased in terms of liveness instead of as a horrible hack.  :)

In pratice, this doesn't change the generated code for either 
255.vortex or 403.gcc, but it could cause minor code changes in 
theory.  This is framework for coming changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60082 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 03:02:41 +00:00
Zhongxing Xu
3253f4c979 Adjust indent. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60081 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 02:57:24 +00:00
Chris Lattner
c5dd22a333 add a long-overdue AllocaInst::isStaticAlloca method. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60080 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-26 02:54:17 +00:00