llvm-6502/test/Transforms/Reassociate/inverses.ll

29 lines
843 B
LLVM
Raw Normal View History

; RUN: opt < %s -reassociate -dce -S | \
; RUN: not grep {\\(and\\|sub\\)}
define i32 @test1(i32 %a, i32 %b) {
%tmp.2 = and i32 %b, %a ; <i32> [#uses=1]
%tmp.4 = xor i32 %a, -1 ; <i32> [#uses=1]
; (A&B)&~A == 0
%tmp.5 = and i32 %tmp.2, %tmp.4 ; <i32> [#uses=1]
ret i32 %tmp.5
}
define i32 @test2(i32 %a, i32 %b) {
%tmp.1 = and i32 %a, 1234 ; <i32> [#uses=1]
%tmp.2 = and i32 %b, %tmp.1 ; <i32> [#uses=1]
%tmp.4 = xor i32 %a, -1 ; <i32> [#uses=1]
; A&~A == 0
%tmp.5 = and i32 %tmp.2, %tmp.4 ; <i32> [#uses=1]
ret i32 %tmp.5
}
define i32 @test3(i32 %b, i32 %a) {
%tmp.1 = add i32 %a, 1234 ; <i32> [#uses=1]
%tmp.2 = add i32 %b, %tmp.1 ; <i32> [#uses=1]
%tmp.4 = sub i32 0, %a ; <i32> [#uses=1]
; (b+(a+1234))+-a -> b+1234
%tmp.5 = add i32 %tmp.2, %tmp.4 ; <i32> [#uses=1]
ret i32 %tmp.5
}