test/CodeGen/Thumb2/thumb2-uxt_rot.ll


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

; RUN: llc < %s -march=thumb -mattr=+thumb2,+t2xtpk | FileCheck %s

define i8 @test1(i32 %A.u) zeroext {
; CHECK: test1
; CHECK: uxtb r0, r0
    %B.u = trunc i32 %A.u to i8
    ret i8 %B.u
}

define i32 @test2(i32 %A.u, i32 %B.u) zeroext {
; CHECK: test2
; CHECK: uxtab  r0, r0, r1
    %C.u = trunc i32 %B.u to i8
    %D.u = zext i8 %C.u to i32
    %E.u = add i32 %A.u, %D.u
    ret i32 %E.u
}

define i32 @test3(i32 %A.u) zeroext {
; CHECK: test3
; CHECK: uxth.w r0, r0, ror #8
    %B.u = lshr i32 %A.u, 8
    %C.u = shl i32 %A.u, 24
    %D.u = or i32 %B.u, %C.u
    %E.u = trunc i32 %D.u to i16
    %F.u = zext i16 %E.u to i32
    ret i32 %F.u
}