Home | History | Annotate | Download | only in Thumb
      1 ; RUN: llc < %s -march=thumb -mattr=+v6 | FileCheck %s
      2 
      3 define i32 @test1(i32 %X) nounwind {
      4 ; CHECK: test1
      5 ; CHECK: rev16 r0, r0
      6         %tmp1 = lshr i32 %X, 8
      7         %X15 = bitcast i32 %X to i32
      8         %tmp4 = shl i32 %X15, 8
      9         %tmp2 = and i32 %tmp1, 16711680
     10         %tmp5 = and i32 %tmp4, -16777216
     11         %tmp9 = and i32 %tmp1, 255
     12         %tmp13 = and i32 %tmp4, 65280
     13         %tmp6 = or i32 %tmp5, %tmp2
     14         %tmp10 = or i32 %tmp6, %tmp13
     15         %tmp14 = or i32 %tmp10, %tmp9
     16         ret i32 %tmp14
     17 }
     18 
     19 define i32 @test2(i32 %X) nounwind {
     20 ; CHECK: test2
     21 ; CHECK: revsh r0, r0
     22         %tmp1 = lshr i32 %X, 8
     23         %tmp1.upgrd.1 = trunc i32 %tmp1 to i16
     24         %tmp3 = trunc i32 %X to i16
     25         %tmp2 = and i16 %tmp1.upgrd.1, 255
     26         %tmp4 = shl i16 %tmp3, 8
     27         %tmp5 = or i16 %tmp2, %tmp4
     28         %tmp5.upgrd.2 = sext i16 %tmp5 to i32
     29         ret i32 %tmp5.upgrd.2
     30 }
     31 
     32 ; rdar://9147637
     33 define i32 @test3(i16 zeroext %a) nounwind {
     34 entry:
     35 ; CHECK: test3:
     36 ; CHECK: revsh r0, r0
     37   %0 = tail call i16 @llvm.bswap.i16(i16 %a)
     38   %1 = sext i16 %0 to i32
     39   ret i32 %1
     40 }
     41 
     42 declare i16 @llvm.bswap.i16(i16) nounwind readnone
     43 
     44 define i32 @test4(i16 zeroext %a) nounwind {
     45 entry:
     46 ; CHECK: test4:
     47 ; CHECK: revsh r0, r0
     48   %conv = zext i16 %a to i32
     49   %shr9 = lshr i16 %a, 8
     50   %conv2 = zext i16 %shr9 to i32
     51   %shl = shl nuw nsw i32 %conv, 8
     52   %or = or i32 %conv2, %shl
     53   %sext = shl i32 %or, 16
     54   %conv8 = ashr exact i32 %sext, 16
     55   ret i32 %conv8
     56 }
     57