llvm-6502/lib/Transforms
Chris Lattner 7a65839f41 Teach loop-reduce to see into nested loops, to pull out immediate values
pushed down by SCEV.

In a nested loop case, this allows us to emit this:

        lis r3, ha16(L_A$non_lazy_ptr)
        lwz r3, lo16(L_A$non_lazy_ptr)(r3)
        add r2, r2, r3
        li r3, 1
.LBB_foo_2:     ; no_exit.1
        lfd f0, 8(r2)        ;; Uses offset of 8 instead of 0
        stfd f0, 0(r2)
        addi r4, r3, 1
        addi r2, r2, 8
        cmpwi cr0, r3, 100
        or r3, r4, r4
        bne .LBB_foo_2  ; no_exit.1

instead of this:

        lis r3, ha16(L_A$non_lazy_ptr)
        lwz r3, lo16(L_A$non_lazy_ptr)(r3)
        add r2, r2, r3
        addi r3, r3, 8
        li r4, 1
.LBB_foo_2:     ; no_exit.1
        lfd f0, 0(r3)
        stfd f0, 0(r2)
        addi r5, r4, 1
        addi r2, r2, 8
        addi r3, r3, 8
        cmpwi cr0, r4, 100
        or r4, r5, r5
        bne .LBB_foo_2  ; no_exit.1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22639 91177308-0d34-0410-b5e6-96231b3b80d8
2005-08-03 23:44:42 +00:00
..
Hello Remove trailing whitespace 2005-04-21 23:48:37 +00:00
Instrumentation Eliminate tabs and trailing spaces 2005-04-23 21:38:35 +00:00
IPO ConstantInt::get only works for arguments < 128. 2005-08-01 16:52:50 +00:00
Scalar Teach loop-reduce to see into nested loops, to pull out immediate values 2005-08-03 23:44:42 +00:00
Utils The correct fix for PR612, which also fixes 2005-08-03 18:51:44 +00:00
ExprTypeConvert.cpp ConvertibleToGEP always returns 0, remove some old crufty code which 2005-07-26 16:38:28 +00:00
LevelRaise.cpp ConvertibleToGEP always returns 0, remove some old crufty code which 2005-07-26 16:38:28 +00:00
Makefile Change Library Names Not To Conflict With Others When Installed 2004-10-27 23:18:45 +00:00
TransformInternals.cpp ConvertibleToGEP always returns 0, remove some old crufty code which 2005-07-26 16:38:28 +00:00
TransformInternals.h ConvertibleToGEP always returns 0, remove some old crufty code which 2005-07-26 16:38:28 +00:00