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llvm-6502/lib/Transforms
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Chris Lattner 7203e158da Refactor this code a bit and make it more general. This now compiles: 
struct S { unsigned int i : 6, j : 11, k : 15; } b;
void plus2 (unsigned int x) { b.j += x; }

To:

_plus2:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        slwi r3, r3, 6
        add r3, r4, r3
        rlwimi r3, r4, 0, 26, 14
        stw r3, 0(r2)
        blr


instead of:

_plus2:
        lis r2, ha16(L_b$non_lazy_ptr)
        lwz r2, lo16(L_b$non_lazy_ptr)(r2)
        lwz r4, 0(r2)
        rlwinm r5, r4, 26, 21, 31
        add r3, r5, r3
        rlwimi r4, r3, 6, 15, 25
        stw r4, 0(r2)
        blr

by eliminating an 'and'.

I'm pretty sure this is as small as we can go :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23386 91177308-0d34-0410-b5e6-96231b3b80d8
2005-09-18 07:22:02 +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 Transform floor((double)FLT) -> (double)floorf(FLT), implementing 2005-08-24 17:22:17 +00:00
Scalar Refactor this code a bit and make it more general. This now compiles: 2005-09-18 07:22:02 +00:00
Utils Teach SplitCriticalEdge to update LoopInfo if it is alive. This fixes 2005-08-13 01:38:43 +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