llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-19 04:32:19 +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

Hello

…

Instrumentation

Changes to runtime framework

2003-02-14 20:41:53 +00:00

IPO

Eliminate tons of bogus warnings

2003-03-03 19:57:46 +00:00

Scalar

Generalize not and neg comparison testers to allow constant to be considered not'able and neg'able. This

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