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Author SHA1 Message Date
Chris Lattner
d3f7621acd simplify this logic. 
llvm-svn: 60189
 2008-11-27 22:46:09 +00:00
Nick Lewycky
f5d5d6026f Also update the README. 
llvm-svn: 60188
 2008-11-27 22:41:45 +00:00
Nick Lewycky
40db216722 Chris prefers icmp/select over udiv! 
llvm-svn: 60187
 2008-11-27 22:41:10 +00:00
Nick Lewycky
0064d6236e Add a synthetic missed optimization. 
llvm-svn: 60186
 2008-11-27 22:12:22 +00:00
Nick Lewycky
882443585d Add a couple of missed optimizations on integer vectors. Multiply and divide 
by 1, as well as multiply by -1.

llvm-svn: 60182
 2008-11-27 20:21:08 +00:00
Chris Lattner
8c052366b3 defensive patch: if CGP is merging a block with the entry block, make sure 
it ends up being the entry block.

llvm-svn: 60180
 2008-11-27 19:29:14 +00:00
Chris Lattner
73b251b3bf Fix PR3138: if we merge the entry block into another block, make sure to 
move the other block back up into the entry position!

llvm-svn: 60179
 2008-11-27 19:25:19 +00:00
Nick Lewycky
847a671436 Silence a warning. 
Despite changing the order of evaluation, this doesn't actually change the
meaning of the statement.

llvm-svn: 60177
 2008-11-27 17:29:52 +00:00
Nuno Lopes
1e97b6c181 fix build on some machines. thanks buildbot 
llvm-svn: 60175
 2008-11-27 16:42:44 +00:00
Nuno Lopes
e3f6758e3c fix my previous commit r60064: compare strings instead of pointers 
llvm-svn: 60174
 2008-11-27 16:37:02 +00:00
Chris Lattner
2959f6224e switch InstCombine::visitLoadInst to use 
FindAvailableLoadedValue

llvm-svn: 60169
 2008-11-27 08:56:30 +00:00
Chris Lattner
dd755c74d6 improve const correctness. 
llvm-svn: 60168
 2008-11-27 08:39:18 +00:00
Chris Lattner
0bd942ecb5 enhance FindAvailableLoadedValue to make use of AliasAnalysis 
if it has it.

llvm-svn: 60167
 2008-11-27 08:18:12 +00:00
Chris Lattner
577096bcaa move FindAvailableLoadedValue from JumpThreading to Transforms/Utils. 
llvm-svn: 60166
 2008-11-27 08:10:05 +00:00
Bill Wendling
cbebccf936 Get rid of bogus "control may reach end of non-void function ‘...’ being 
inlined" message.

llvm-svn: 60165
 2008-11-27 08:00:12 +00:00
Chris Lattner
cab07ddaeb simplify this code a bit. 
llvm-svn: 60164
 2008-11-27 07:54:38 +00:00
Chris Lattner
e1ed3a2962 Use the new MergeBasicBlockIntoOnlyPred function. 
llvm-svn: 60163
 2008-11-27 07:54:12 +00:00
Chris Lattner
bb86dff3fe move MergeBasicBlockIntoOnlyPred to Transforms/Utils. 
llvm-svn: 60162
 2008-11-27 07:43:12 +00:00
Bill Wendling
7742719284 XFAil test due to reverting of patch. 
llvm-svn: 60161
 2008-11-27 07:34:10 +00:00
Chris Lattner
98f62336b7 rename ThreadBlock to ProcessBlock, since it does other things than 
just simple threading.

llvm-svn: 60157
 2008-11-27 07:20:04 +00:00
Bill Wendling
4a6eedb51d Comment out code that isn't entirely correct. 
llvm-svn: 60156
 2008-11-27 07:18:35 +00:00
Misha Brukman
54dad5f940 Fixed HTML closing tag, cleaned up some spacing. 
llvm-svn: 60153
 2008-11-27 06:41:20 +00:00
Sanjiv Gupta
0638ca3697 Removing redundant semicolons. No functionality change. 
llvm-svn: 60149
 2008-11-27 05:58:04 +00:00
Chris Lattner
532458b89f 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.

llvm-svn: 60148
 2008-11-27 05:07:53 +00:00
Evan Cheng
7db1955286 Eliminate a compile time warning. 
llvm-svn: 60145
 2008-11-27 02:29:25 +00:00
Evan Cheng
ee5e950c25 Avoid inserting noop's in the middle of a loop. 
llvm-svn: 60141
 2008-11-27 01:16:00 +00:00
Evan Cheng
f18016728c 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

llvm-svn: 60139
 2008-11-27 00:49:46 +00:00
Dale Johannesen
0d6dd4bdb9 Add a missing case in visitADD. 
llvm-svn: 60137
 2008-11-27 00:43:21 +00:00
Evan Cheng
4da44412cf Add -march=x86. 
llvm-svn: 60135
 2008-11-27 00:37:06 +00:00
Ted Kremenek
d0f8118dc1 Add typedef to StringMapEntry. 
llvm-svn: 60134
 2008-11-27 00:17:25 +00:00
Mikhail Glushenkov
869ded12c8 Disallow multiple edges. 
llvm-svn: 60127
 2008-11-26 22:59:45 +00:00
Bill Wendling
3376836463 Add x86-specific test for add-with-overflow intrinsics. 
llvm-svn: 60125
 2008-11-26 22:42:19 +00:00
Bill Wendling
c60a07dbf2 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

llvm-svn: 60123
 2008-11-26 22:37:40 +00:00
Chris Lattner
d01522d33a 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 :)

llvm-svn: 60120
 2008-11-26 22:16:44 +00:00
Bill Wendling
d8a4b1ec05 Small formatting change. 
llvm-svn: 60113
 2008-11-26 19:19:05 +00:00
Bill Wendling
cdc91a5f09 Update to explain how ssp and sspreq attributes override each other. 
llvm-svn: 60112
 2008-11-26 19:07:40 +00:00
Devang Patel
02a25292de Fix typo. 
llvm-svn: 60111
 2008-11-26 18:13:11 +00:00
Evan Cheng
c18e38d19f Cosmetic. 
llvm-svn: 60110
 2008-11-26 18:00:00 +00:00
Duncan Sands
f64dd4b09c Check that running the DAG combiner between type 
and operation legalization does something useful.

llvm-svn: 60108
 2008-11-26 16:44:30 +00:00
Mikhail Glushenkov
1381c387d4 Describe some more options in the man page. 
llvm-svn: 60105
 2008-11-26 13:40:08 +00:00
Sanjiv Gupta
91da4472f4 Allow custom lowering of ADDE/ADDC/SUBE/SUBC operations. 
llvm-svn: 60102
 2008-11-26 11:19:00 +00:00
Mikhail Glushenkov
01a62b9117 Fix the -I option (llvmc -I dir1 -I dir2 didn't work). 
llvm-svn: 60101
 2008-11-26 10:57:31 +00:00
Mikhail Glushenkov
3dd6b7e4e9 Refactor Tools.td to remove repetition. 
llvm-svn: 60100
 2008-11-26 10:56:56 +00:00
Mikhail Glushenkov
7534e81f38 Small fix: the error message was incorrect in some cases. 
llvm-svn: 60099
 2008-11-26 10:55:45 +00:00
Sanjiv Gupta
1fa97cc7dd Emit declaration for globals and externs. 
Custom lower AND, OR, XOR bitwise operations.

llvm-svn: 60098
 2008-11-26 10:53:50 +00:00
Dan Gohman
6a589b31f7 Fish kill flag annotations in PUSH instructions. 
llvm-svn: 60095
 2008-11-26 06:39:12 +00:00
Dan Gohman
7b56f8686f 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.

llvm-svn: 60092
 2008-11-26 05:50:31 +00:00
Chris Lattner
1bfd6e8709 teach the new heuristic how to handle inline asm. 
llvm-svn: 60088
 2008-11-26 04:59:11 +00:00
Devang Patel
c17a1f06f3 Disable -loop-index-split for now. 
llvm-svn: 60087
 2008-11-26 04:58:14 +00:00
Ted Kremenek
b31e49cd47 Add 'tell' method to raw_fd_ostream that clients can use to query the current location in the file the stream is writing to. 
llvm-svn: 60085
 2008-11-26 03:33:13 +00:00