1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
; RUN: llc -mtriple=thumb-eabi -mcpu=arm1156t2-s -mattr=+thumb2,+v7,+t2xtpk %s -o - | FileCheck %s
define i32 @f1(i32 %a) {
; CHECK-LABEL: f1:
; CHECK: rev r0, r0
%tmp = tail call i32 @llvm.bswap.i32(i32 %a)
ret i32 %tmp
}
declare i32 @llvm.bswap.i32(i32) nounwind readnone
define i32 @f2(i32 %X) {
; CHECK-LABEL: f2:
; CHECK: revsh r0, r0
%tmp1 = lshr i32 %X, 8
%tmp1.upgrd.1 = trunc i32 %tmp1 to i16
%tmp3 = trunc i32 %X to i16
%tmp2 = and i16 %tmp1.upgrd.1, 255
%tmp4 = shl i16 %tmp3, 8
%tmp5 = or i16 %tmp2, %tmp4
%tmp5.upgrd.2 = sext i16 %tmp5 to i32
ret i32 %tmp5.upgrd.2
}
|
