1; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona < %s | FileCheck %s
2
3; After tail duplication, two copies in an early exit BB can be cancelled out.
4; rdar://10640363
5define i32 @t1(i32 %a, i32 %b) nounwind  {
6entry:
7; CHECK-LABEL: t1:
8; CHECK: je [[LABEL:.*BB.*]]
9  %cmp1 = icmp eq i32 %b, 0
10  br i1 %cmp1, label %while.end, label %while.body
11
12; CHECK: [[LABEL]]:
13; CHECK-NOT: mov
14; CHECK: ret
15
16while.body:                                       ; preds = %entry, %while.body
17  %a.addr.03 = phi i32 [ %b.addr.02, %while.body ], [ %a, %entry ]
18  %b.addr.02 = phi i32 [ %rem, %while.body ], [ %b, %entry ]
19  %rem = srem i32 %a.addr.03, %b.addr.02
20  %cmp = icmp eq i32 %rem, 0
21  br i1 %cmp, label %while.end, label %while.body
22
23while.end:                                        ; preds = %while.body, %entry
24  %a.addr.0.lcssa = phi i32 [ %a, %entry ], [ %b.addr.02, %while.body ]
25  ret i32 %a.addr.0.lcssa
26}
27
28; Two movdqa (from phi-elimination) in the entry BB cancels out.
29; rdar://10428165
30define <8 x i16> @t2(<8 x i16> %T0, <8 x i16> %T1) nounwind readnone {
31entry:
32; CHECK-LABEL: t2:
33; CHECK-NOT: movdqa
34  %tmp8 = shufflevector <8 x i16> %T0, <8 x i16> %T1, <8 x i32> < i32 undef, i32 undef, i32 7, i32 2, i32 8, i32 undef, i32 undef , i32 undef >
35  ret <8 x i16> %tmp8
36}
37