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55 Commits

Author SHA1 Message Date
Bill Wendling
650b0527a4 Checking for "zero operands" during the "CanHoistInst()" method isn't necessary 
because those with side effects will be caught by other checks in here.

Also, simplify the check for a BB in a sub loop.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44871 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-11 18:45:11 +00:00
Bill Wendling
041b3f8356 Reverting 44702. It wasn't correct to rename them. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44727 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-08 23:58:46 +00:00
Bill Wendling
320c630c1b Renaming: 
isTriviallyReMaterializable -> hasNoSideEffects
  isReallyTriviallyReMaterializable -> isTriviallyReMaterializable


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44702 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-08 07:17:56 +00:00
Bill Wendling
b48519cbad Incorporated comments from Evan and Chris: 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20071203/056043.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20071203/056048.html



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44696 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-08 01:47:01 +00:00
Bill Wendling
0f940c95d4 Initial commit of the machine code LICM pass. It successfully hoists this: 
_foo:
        li r2, 0
LBB1_1: ; bb
        li r5, 0
        stw r5, 0(r3)
        addi r2, r2, 1
        addi r3, r3, 4
        cmplw cr0, r2, r4
        bne cr0, LBB1_1 ; bb
LBB1_2: ; return
        blr 

to:

_foo:
        li r2, 0
        li r5, 0
LBB1_1: ; bb
        stw r5, 0(r3)
        addi r2, r2, 1
        addi r3, r3, 4
        cmplw cr0, r2, r4
        bne cr0, LBB1_1 ; bb
LBB1_2: ; return
        blr

ZOMG!! :-)

Moar to come...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44687 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-07 21:42:31 +00:00