1 ; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona < %s | FileCheck %s
3 ; After tail duplication, two copies in an early exit BB can be cancelled out.
4 ; rdar://10640363
5 define i32 @t1(i32 %a, i32 %b) nounwind {
6 entry:
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
12 ; CHECK: [[LABEL]]:
13 ; CHECK-NOT: mov
14 ; CHECK: ret
16 while.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
23 while.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 }
28 ; Two movdqa (from phi-elimination) in the entry BB cancels out.
29 ; rdar://10428165
30 define <8 x i16> @t2(<8 x i16> %T0, <8 x i16> %T1) nounwind readnone {
31 entry:
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 }