1; RUN: llc < %s
2; PR6372
3;
4; This test produces a move instruction with an implicitly defined super-register:
5;
6;   %DL<def> = MOV8rr %reg1038<kill>, %RDX<imp-def>
7;
8; When %DL is rematerialized, we must remember to update live intervals for
9; sub-registers %DX and %EDX.
10
11target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
12target triple = "x86_64-apple-darwin10.0.0"
13
14define noalias i8* @foo() nounwind ssp {
15entry:
16  br i1 undef, label %for.end, label %for.body
17
18for.body:                                         ; preds = %if.end40, %entry
19  %tmp6 = load i8* undef, align 2                 ; <i8> [#uses=3]
20  %conv11 = sext i8 %tmp6 to i64                  ; <i64> [#uses=1]
21  %cmp15 = icmp slt i64 %conv11, undef            ; <i1> [#uses=1]
22  br i1 %cmp15, label %if.end, label %if.then
23
24if.then:                                          ; preds = %for.body
25  %conv18 = sext i8 %tmp6 to i32                  ; <i32> [#uses=1]
26  %call = tail call i32 (...)* @invalid(i32 0, i32 0, i32 %conv18) nounwind ; <i32> [#uses=0]
27  br label %if.end
28
29if.end:                                           ; preds = %if.then, %for.body
30  %index.0 = phi i8 [ 0, %if.then ], [ %tmp6, %for.body ] ; <i8> [#uses=1]
31  store i8 %index.0, i8* undef
32  %tmp24 = load i8* undef                         ; <i8> [#uses=2]
33  br i1 undef, label %if.end40, label %if.then36
34
35if.then36:                                        ; preds = %if.end
36  %conv38 = sext i8 %tmp24 to i32                 ; <i32> [#uses=1]
37  %call39 = tail call i32 (...)* @invalid(i32 0, i32 0, i32 %conv38) nounwind ; <i32> [#uses=0]
38  br label %if.end40
39
40if.end40:                                         ; preds = %if.then36, %if.end
41  %index.1 = phi i8 [ 0, %if.then36 ], [ %tmp24, %if.end ] ; <i8> [#uses=1]
42  store i8 %index.1, i8* undef
43  br i1 false, label %for.body, label %for.end
44
45for.end:                                          ; preds = %if.end40, %entry
46  ret i8* undef
47}
48
49declare i32 @invalid(...)
50