1; RUN: llc -O0 < %s -verify-machineinstrs
2; RUN: llc < %s -verify-machineinstrs
3target triple = "x86_64-apple-macosx10.7"
4
5; This test case extracts a sub_8bit_hi sub-register:
6;
7;	%r8b = COPY %bh, implicit killed %ebx
8;	%esi = MOVZX32_NOREXrr8 killed %r8b
9;
10; The register allocation above is invalid, %bh can only be encoded without an
11; REX prefix, so the destination register must be GR8_NOREX.  The code above
12; triggers an assertion in copyPhysReg.
13;
14; <rdar://problem/10248099>
15
16define void @f() nounwind uwtable ssp {
17entry:
18  %0 = load i32, i32* undef, align 4
19  %add = add i32 0, %0
20  %conv1 = trunc i32 %add to i16
21  %bf.value = and i16 %conv1, 255
22  %1 = and i16 %bf.value, 255
23  %2 = shl i16 %1, 8
24  %3 = load i16, i16* undef, align 1
25  %4 = and i16 %3, 255
26  %5 = or i16 %4, %2
27  store i16 %5, i16* undef, align 1
28  %6 = load i16, i16* undef, align 1
29  %7 = lshr i16 %6, 8
30  %bf.clear2 = and i16 %7, 255
31  %conv3 = zext i16 %bf.clear2 to i32
32  %rem = srem i32 %conv3, 15
33  %conv4 = trunc i32 %rem to i16
34  %bf.value5 = and i16 %conv4, 255
35  %8 = and i16 %bf.value5, 255
36  %9 = shl i16 %8, 8
37  %10 = or i16 undef, %9
38  store i16 %10, i16* undef, align 1
39  ret void
40}
41
42; This test case extracts a sub_8bit_hi sub-register:
43;
44;       %2 = COPY %1:sub_8bit_hi; GR8:%2 GR64_ABCD:%1
45;       TEST8ri %2, 1, implicit-def %eflags; GR8:%2
46;
47; %2 must be constrained to GR8_NOREX, or the COPY could become impossible.
48;
49; PR11088
50
51define fastcc i32 @g(i64 %FB) nounwind uwtable readnone align 2 {
52entry:
53  %and32 = and i64 %FB, 256
54  %cmp33 = icmp eq i64 %and32, 0
55  %Features.6.or35 = select i1 %cmp33, i32 0, i32 undef
56  %cmp38 = icmp eq i64 undef, 0
57  %or40 = or i32 %Features.6.or35, 4
58  %Features.8 = select i1 %cmp38, i32 %Features.6.or35, i32 %or40
59  %and42 = and i64 %FB, 32
60  %or45 = or i32 %Features.8, 2
61  %cmp43 = icmp eq i64 %and42, 0
62  %Features.8.or45 = select i1 %cmp43, i32 %Features.8, i32 %or45
63  %and47 = and i64 %FB, 8192
64  %cmp48 = icmp eq i64 %and47, 0
65  %or50 = or i32 %Features.8.or45, 32
66  %Features.10 = select i1 %cmp48, i32 %Features.8.or45, i32 %or50
67  %or55 = or i32 %Features.10, 64
68  %Features.10.or55 = select i1 undef, i32 %Features.10, i32 %or55
69  %and57 = lshr i64 %FB, 2
70  %and57.tr = trunc i64 %and57 to i32
71  %or60 = and i32 %and57.tr, 1
72  %Features.12 = or i32 %Features.10.or55, %or60
73  %and62 = and i64 %FB, 128
74  %or65 = or i32 %Features.12, 8
75  %cmp63 = icmp eq i64 %and62, 0
76  %Features.12.or65 = select i1 %cmp63, i32 %Features.12, i32 %or65
77  %Features.14 = select i1 undef, i32 undef, i32 %Features.12.or65
78  %Features.16 = select i1 undef, i32 undef, i32 %Features.14
79  ret i32 %Features.16
80}
81