thumb2-sxt_rot.ll   [plain text]

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

define i32 @test0(i8 %A) {
; CHECK: test0
; CHECK: sxtb r0, r0
        %B = sext i8 %A to i32
	ret i32 %B
}

define signext i8 @test1(i32 %A)  {
; CHECK: test1
; CHECK: sxtb.w r0, r0, ror #8
	%B = lshr i32 %A, 8
	%C = shl i32 %A, 24
	%D = or i32 %B, %C
	%E = trunc i32 %D to i8
	ret i8 %E
}

define signext i32 @test2(i32 %A, i32 %X)  {
; CHECK: test2
; CHECK: lsrs r0, r0, #8
; CHECK: sxtab  r0, r1, r0
	%B = lshr i32 %A, 8
	%C = shl i32 %A, 24
	%D = or i32 %B, %C
	%E = trunc i32 %D to i8
        %F = sext i8 %E to i32
        %G = add i32 %F, %X
	ret i32 %G
}