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Author SHA1 Message Date
Eli Friedman
cea03cdb69 Remove a completed optimization. Add a potential optimization I ran 
into.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71352 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-09 08:40:15 +00:00
Duncan Sands
777d2306b3 Rename PaddedSize to AllocSize, in the hope that this 
will make it more obvious what it represents, and stop
it being confused with the StoreSize.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71349 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-09 07:06:46 +00:00
Sanjiv Gupta
09560f805e Use 16 bit arithmetic while retrieving the address of callee's frame during indirect function calls, and set pclath before every call to retrieve the frame address. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71323 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-09 05:11:19 +00:00
Evan Cheng
2d85052f2b Factor out code that optimize loop terminating condition. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71305 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-09 01:08:24 +00:00
Dan Gohman
c63a62735b Don't attempt to handle unsized types in ScalarEvolution's GEP analyzer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71302 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-09 00:14:52 +00:00
Evan Cheng
f045f80ba9 Enable loop bb placement optimization. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71291 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 23:35:49 +00:00
Dan Gohman
b0285932ab Fix bogus overflow checks by replacing them with actual 
overflow checks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71284 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 23:11:16 +00:00
Evan Cheng
82ae933e55 PPC::B and PPC::BCC's target operand may be an immediate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71282 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 23:09:25 +00:00
Mike Stump
3fbdbd9898 In non-pic builds, we can use -mdynamic-no-pic for a little more speed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71281 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 23:08:58 +00:00
Dan Gohman
099672beef Use .td for tablegen files, not .ll. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71277 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 23:01:28 +00:00
Mike Stump
1e8f072f19 Avoid warning in release-asserts build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71275 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 22:53:06 +00:00
Bill Wendling
6c4311dddb Mirror how Fast ISel determines if a region.end intrinsic is the end of an 
inlined function or the end of a function. Before, this was never executing the
"inlined" version of the Record method.

This will become important once the inlined Dwarf writer patch lands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71268 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 21:14:49 +00:00
Dan Gohman
728c7f3059 Fold trunc casts into add-recurrence expressions, allowing the 
add-recurrence to be exposed. Add a new SCEV folding rule to
help simplify expressions in the presence of these extra truncs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71264 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 21:03:19 +00:00
Bill Wendling
e688fafd38 Compute the offsets of the compile units. We need this so that when we emit a 
concrete instance of an inlined function, we can get the actual address of the
abstract instance inside of the compile unit.

This isn't currently used, but will be by a future check-in.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71263 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 21:03:15 +00:00
Dan Gohman
fb79160811 Fix another bug in r71252. This code supports GetElementPtr 
constant exprs as well as instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71262 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:58:38 +00:00
Bill Wendling
871eb0ab23 Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71260 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:49:29 +00:00
Dan Gohman
6bce643c36 Add memoization for getSCEVAtScope results for instructions 
which are not analyzed with SCEV techniques, which can require
brute-forcing through a large number of instructions. This
fixes a massive compile-time issue on 400.perlbench (in
particular, the loop in MD5Transform).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71259 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:47:27 +00:00
Dan Gohman
66a7e857aa Make the SCEV* form of getSCEVAtScope public, to allow ScalarEvolution 
clients to use it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71258 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:38:54 +00:00
Bill Wendling
a9519579b7 Minor clean ups. No functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71256 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:38:02 +00:00
Dan Gohman
e810b0d430 Fix an error from r71252. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71255 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:36:47 +00:00
Bill Wendling
ad9c278338 Print out nicer dump info for DIDescriptor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71253 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:28:06 +00:00
Dan Gohman
26466c0eb3 Factor out the code for creating SCEVs for GEPs into a 
separate function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71252 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:26:55 +00:00
Dan Gohman
185cf0395c Implement several new SCEV folding rules for UDiv SCEVs. 
This fixes an old FIXME, and is needed by some upcoming changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71247 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:18:49 +00:00
Dan Gohman
1827e8263c Add a getExitBlock utility function to LoopInfo which returns the 
exit block of a loop, if there is exactly one, similar to
getExitingBlock.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71245 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 20:07:23 +00:00
Evan Cheng
0269d3cbf3 Don't align loop header unless the loop back edge is below the header. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71242 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 19:01:44 +00:00
Anton Korobeynikov
c1c6ef8f74 Factor out cycle-finder code and make it generic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71241 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 18:51:58 +00:00
Anton Korobeynikov
d34167a4ab Do not emit bit tests if target does not support natively left shift 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71240 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 18:51:34 +00:00
Anton Korobeynikov
da4d2f63d8 Allow 8 bit select in custom inserter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71239 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 18:51:21 +00:00
Anton Korobeynikov
58c04e1496 Properly expand libcalls for urem / srem. Also make code more straightforward. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71238 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 18:51:08 +00:00
Anton Korobeynikov
fb3f84fe16 Typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71237 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 18:50:54 +00:00
Anton Korobeynikov
0616c3b678 Expand UREM / SREM into libcalls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71236 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 18:50:41 +00:00
Anton Korobeynikov
1cb0acee8a Add 8 bit select 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71235 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 18:50:26 +00:00
Chris Lattner
4992196322 Fix PR4152: asm constraint validation happens before dag combine, so we 
need to work a bit to combine things like (x+c1+c2) into x+c3.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71232 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 18:23:14 +00:00
Duncan Sands
2a6e0a2140 Add some examples to show the difference between 
the various notions of type size used in LLVM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71230 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 17:49:48 +00:00
Chris Lattner
c89146587a Change 'make install' to install tblgen, for better support of out-of-tree targets, 
patch by Mikael Lepistö!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71226 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 17:32:47 +00:00
Chris Lattner
ef554846f0 fix RewriteStoreUserOfWholeAlloca to use the correct type size 
method, fixing a crash on PR4146.  While the store will 
ultimately overwrite the "padded size" number of bits in memory,
the stored value may be a subset of this size.  This function
only wants to handle the case where all bits are stored.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71224 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 15:54:41 +00:00
Evan Cheng
4b7f7a6e1f Reverse branch condition only when there is a conditional branch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71214 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 09:35:53 +00:00
Nick Lewycky
0ab2dcee5b Add explicit braces to disambiguate nested if/else. Removes a warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71211 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 06:57:41 +00:00
Nick Lewycky
48f95ad971 This transform requires valid TargetData info. Wrap it in 'if (TD)' in 
preparation for the day we use null TargetData when no target is specified.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71210 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 06:47:37 +00:00
Evan Cheng
45e0010e14 Optimize code placement in loop to eliminate unconditional branches or move unconditional branch to the outside of the loop. e.g. 
///       A:                                                                                                                                                                 
///       ...                                                                                                                                                                
///       <fallthrough to B>                                                                                                                                                 
///                                                                                                                                                                          
///       B:  --> loop header                                                                                                                                                
///       ...                                                                                                                                                                
///       jcc <cond> C, [exit]                                                                                                                                               
///                                                                                                                                                                          
///       C:                                                                                                                                                                 
///       ...                                                                                                                                                                
///       jmp B                                                                                                                                                              
///                                                                                                                                                                          
/// ==>                                                                                                                                                                      
///                                                                                                                                                                          
///       A:                                                                                                                                                                 
///       ...                                                                                                                                                                
///       jmp B                                                                                                                                                              
///                                                                                                                                                                          
///       C:  --> new loop header                                                                                                                                            
///       ...                                                                                                                                                                
///       <fallthough to B>                                                                                                                                                  
///                                                                                                                                                                          
///       B:                                                                                                                                                                 
///       ...                                                                                                                                                                
///       jcc <cond> C, [exit] 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71209 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 06:34:09 +00:00
Nick Lewycky
4a228864f2 Add missing #include for "strlen" which is used inline in this header. Fixes 
build under gcc 4.3.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71208 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 06:22:25 +00:00
Sanjiv Gupta
573eb5e573 Moved pic16 naming functions to correct place. 
No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71207 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 04:50:14 +00:00
Eli Friedman
5877ad7e90 PR4123: don't crash when inlining a call which uses its own result. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71199 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-08 00:22:04 +00:00
Bob Wilson
9d928c223f Fix pr4100. Do not remove no-op copies when they are dead. The register 
scavenger gets confused about register liveness if it doesn't see them.
I'm not thrilled with this solution, but it only comes up when there are dead
copies in the code, which is something that hopefully doesn't happen much.

Here is what happens in pr4100: As shown in the following excerpt from the
debug output of llc, the source of a move gets reloaded from the stack,
inserting a new load instruction before the move.  Since that source operand
is a kill, the physical register is free to be reused for the destination
of the move.  The move ends up being a no-op, copying R3 to R3, so it is
deleted.  But, it leaves behind the load to reload %reg1028 into R3, and
that load is not updated to show that it's destination operand (R3) is dead.
The scavenger gets confused by that load because it thinks that R3 is live.

Starting RegAlloc of: %reg1025<def,dead> = MOVr %reg1028<kill>, 14, %reg0, %reg0
  Regs have values: 
  Reloading %reg1028 into R3
  Last use of R3[%reg1028], removing it from live set
  Assigning R3 to %reg1025
  Register R3 [%reg1025] is never used, removing it from live set

Alternative solutions might be either marking the load as dead, or zapping
the load along with the no-op copy.  I couldn't see an easy way to do
either of those, though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71196 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-07 23:47:03 +00:00
Bob Wilson
8d24f4124e Fix a comment (again). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71180 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-07 21:20:42 +00:00
Bob Wilson
e0f745b54e Fix a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71179 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-07 21:19:45 +00:00
Dan Gohman
9a38e3e399 Revert 71165. It did more than just revert 71158 and it introduced 
several regressions. The problem due to 71158 is now fixed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71176 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-07 19:46:24 +00:00
Dan Gohman
31e4c77fae Perform constant folding on operands of instructions with non-void 
types, such as loads and calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71175 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-07 19:43:39 +00:00
Dan Gohman
a6b35e201f SCEVComplexityCompare's new code was missing SCEVUDivExpr. Implement 
the SCEVUDivExpr case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71173 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-07 19:23:21 +00:00
Duncan Sands
1978426a94 Revert r70876 and add a testcase (@c7) showing the problem: 
bits captured, but the pointer marked nocapture.  In fact
I now recall that this problem is why only readnone functions
returning void were considered before!  However keep a small
fix that was also in r70876: a readnone function returning
void can result in bits being captured if it unwinds, so
test for this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71168 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-05-07 18:08:34 +00:00