1; RUN: llc < %s -verify-machineinstrs | FileCheck %s
2target triple = "x86_64-apple-macosx10.8.0"
3
4; The critical edge from for.cond to if.end2 should be split to avoid injecting
5; copies into the loop. The use of %b after the loop causes interference that
6; makes a copy necessary.
7; <rdar://problem/11561842>
8;
9; CHECK: split_loop_exit
10; CHECK: %for.cond
11; CHECK-NOT: mov
12; CHECK: je
13
14define i32 @split_loop_exit(i32 %a, i32 %b, i8* nocapture %p) nounwind uwtable readonly ssp {
15entry:
16  %cmp = icmp sgt i32 %a, 10
17  br i1 %cmp, label %for.cond, label %if.end2
18
19for.cond:                                         ; preds = %entry, %for.cond
20  %p.addr.0 = phi i8* [ %incdec.ptr, %for.cond ], [ %p, %entry ]
21  %incdec.ptr = getelementptr inbounds i8* %p.addr.0, i64 1
22  %0 = load i8* %p.addr.0, align 1
23  %tobool = icmp eq i8 %0, 0
24  br i1 %tobool, label %for.cond, label %if.end2
25
26if.end2:                                          ; preds = %for.cond, %entry
27  %r.0 = phi i32 [ %a, %entry ], [ %b, %for.cond ]
28  %add = add nsw i32 %r.0, %b
29  ret i32 %add
30}
31