llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-03-01 01:30:36 +00:00

History

Chris Lattner 8d96964e29 Generalize not and neg comparison testers to allow constant to be considered not'able and neg'able. This

allows optimization of this:
int %test4(int %A, int %B) {
        %a = xor int %A, -1
        %c = and int %a, 5    ; 5 = ~c2
        %d = xor int %c, -1
        ret int %d
}

into this:
int %test4(int %A, int %B) {            ; No predecessors!
        %c.demorgan = or int %A, -6             ; <int> [#uses=1]
        ret int %c.demorgan
}


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5736 91177308-0d34-0410-b5e6-96231b3b80d8

2003-03-10 23:06:50 +00:00

ADCE.cpp

Rename Instruction::hasSideEffects() -> mayWriteToMemory()

2003-02-24 20:48:32 +00:00

BreakCriticalEdges.cpp

BreakCriticalEdges should update dominance frontier information as well as

2002-10-31 02:44:36 +00:00

ConstantProp.cpp

- Rename AnalysisUsage::preservesAll to getPreservesAll & preservesCFG to

2002-10-21 20:00:28 +00:00

CorrelatedExprs.cpp

Fix spelling error