maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
230,594 Commits 23 Branches 0 Tags 2.2 GiB
Commit Graph

116 Commits

Author SHA1 Message Date
Bill Wendling 0392f1b437 Disable the peephole optimizer until 186.crafty on armv6 is fixed. This is what 
looks like is happening:

Without the peephole optimizer:
  (1)   sub     r6, r6, #32
        orr     r12, r12, lr, lsl r9
        orr     r2, r2, r3, lsl r10
  (x)   cmp     r6, #0
        ldr     r9, LCPI2_10
        ldr     r10, LCPI2_11
  (2)   sub     r8, r8, #32
  (a)   movge   r12, lr, lsr r6
  (y)   cmp     r8, #0
LPC2_10:
        ldr     lr, [pc, r10]
  (b)   movge   r2, r3, lsr r8

With the peephole optimizer:
        ldr     r9, LCPI2_10
        ldr     r10, LCPI2_11
  (1*)  subs    r6, r6, #32
  (2*)  subs    r8, r8, #32
  (a*)  movge   r12, lr, lsr r6
  (b*)  movge   r2, r3, lsr r8

(1) is used by (x) for the conditional move at (a). (2) is used by (y) for the
conditional move at (b). After the peephole optimizer, these the flags resulting
from (1*) are ignored and only the flags from (2*) are considered for both
conditional moves.

llvm-svn: 117876
 2010-10-31 22:07:12 +00:00
Owen Anderson 6c18d1aac0 Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which 
must be called in the pass's constructor.  This function uses static dependency declarations to recursively initialize
the pass's dependencies.

Clients that only create passes through the createFooPass() APIs will require no changes.  Clients that want to use the
CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h
before parsing commandline arguments.

I have tested this with all standard configurations of clang and llvm-gcc on Darwin.  It is possible that there are problems
with the static dependencies that will only be visible with non-standard options.  If you encounter any crash in pass
registration/creation, please send the testcase to me directly.

llvm-svn: 116820
 2010-10-19 17:21:58 +00:00
Bill Wendling 337a31133b Don't recompute MachineRegisterInfo in the Optimize* method. 
llvm-svn: 116750
 2010-10-18 21:22:31 +00:00
Owen Anderson 8ac477ffb5 Begin adding static dependence information to passes, which will allow us to 
perform initialization without static constructors AND without explicit initialization
by the client.  For the moment, passes are required to initialize both their
(potential) dependencies and any passes they preserve.  I hope to be able to relax
the latter requirement in the future.

llvm-svn: 116334
 2010-10-12 19:48:12 +00:00
Owen Anderson df7a4f2515 Now with fewer extraneous semicolons! 
llvm-svn: 115996
 2010-10-07 22:25:06 +00:00
Gabor Greif adbbb93d3d Move the search for the appropriate AND instruction 
into OptimizeCompareInstr.
This necessitates the passing of CmpValue around,
so widen the virtual functions to accomodate.

No functionality changes.

llvm-svn: 114428
 2010-09-21 12:01:15 +00:00
Gabor Greif f08b36d386 must not peephole away side effects 
llvm-svn: 113848
 2010-09-14 20:46:08 +00:00
Bill Wendling 27dddd1fd1 Rename ConvertToSetZeroFlag to something more general. 
llvm-svn: 113670
 2010-09-11 00:13:50 +00:00
Bill Wendling d0a5f4e238 No need to recompute the SrcReg and CmpValue. 
llvm-svn: 113666
 2010-09-10 23:46:12 +00:00
Bill Wendling 041230014c Move some of the decision logic for converting an instruction into one that sets 
the 'zero' bit down into the back-end. There are other cases where this logic
isn't sufficient, so they should be handled separately.

llvm-svn: 113665
 2010-09-10 23:34:19 +00:00
Bill Wendling aee679bf35 Modify the comparison optimizations in the peephole optimizer to update the 
iterator when an optimization took place. This allows us to do more insane
things with the code than just remove an instruction or two.

llvm-svn: 113640
 2010-09-10 21:55:43 +00:00
Bill Wendling 6628431a91 Remove now unneeded command line flag that enables 'optimize compares.' 
llvm-svn: 112287
 2010-08-27 20:39:09 +00:00
Bill Wendling 0757820f8f Turn optimize compares back on with fix. We needed to test that a machine op was 
a register before checking if it was defined.

llvm-svn: 110733
 2010-08-10 21:38:11 +00:00
Dan Gohman a53f4e23e4 Revert r110718; it broke clang-i386-darwin9. 
llvm-svn: 110726
 2010-08-10 20:49:33 +00:00
Bill Wendling 558f822bc7 Turn optimize cmps on by default so that we can get some testing by the nightly 
ARM testers.

llvm-svn: 110718
 2010-08-10 20:23:02 +00:00
Bill Wendling ca67835eaa Merge the OptimizeExts and OptimizeCmps passes into one PeepholeOptimizer 
pass. This pass should expand with all of the small, fine-grained optimization
passes to reduce compile time and increase happiment.

llvm-svn: 110627
 2010-08-09 23:59:04 +00:00