1 ; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona -verify-machineinstrs < %s | FileCheck %s
3 ; After tail duplication, two copies in an early exit BB can be cancelled out.
5 define i32 @t1(i32 %a, i32 %b) nounwind {
8 ; CHECK: je [[LABEL:.*BB.*]]
9 %cmp1 = icmp eq i32 %b, 0
10 br i1 %cmp1, label %while.end, label %while.body
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
28 ; Two movdqa (from phi-elimination) in the entry BB cancels out.
30 define <8 x i16> @t2(<8 x i16> %T0, <8 x i16> %T1) nounwind readnone {
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 >
38 define i32 @t3(i64 %a, i64 %b) nounwind {
41 ; CHECK: je [[LABEL:.*BB.*]]
42 %cmp1 = icmp eq i64 %b, 0
43 br i1 %cmp1, label %while.end, label %while.body
49 while.body: ; preds = %entry, %while.body
50 %a.addr.03 = phi i64 [ %b.addr.02, %while.body ], [ %a, %entry ]
51 %b.addr.02 = phi i64 [ %rem, %while.body ], [ %b, %entry ]
52 %rem = srem i64 %a.addr.03, %b.addr.02
53 %cmp = icmp eq i64 %rem, 0
54 br i1 %cmp, label %while.end, label %while.body
56 while.end: ; preds = %while.body, %entry
57 %a.addr.0.lcssa = phi i64 [ %a, %entry ], [ %b.addr.02, %while.body ]
58 %t = trunc i64 %a.addr.0.lcssa to i32
62 ; Check that copy propagation does not kill thing like:
63 ; dst = copy src <-- do not kill that.
64 ; ... = op1 dst<undef>
65 ; ... = op2 dst <-- this is used here.
72 ; CHECK-NEXT: pand %xmm{{[0-9]+}}, [[SRC:%xmm[0-9]+]]
73 ; Machine propagation used to delete the first copy as the
74 ; first few uses were <undef>.
75 ; CHECK-NEXT: movdqa [[SRC]], [[CPY1:%xmm[0-9]+]]
76 ; CHECK-NEXT: movdqa [[SRC]], [[CPY2:%xmm[0-9]+]]
77 ; CHECK-NEXT: punpckhbw [[SRC]],
78 ; Check that CPY1 is not redefined.
79 ; CHECK-NOT: , [[CPY1]]
80 ; undef use, we do not care.
81 ; CHECK: punpcklwd [[CPY1]],
82 ; Check that CPY1 is not redefined.
83 ; CHECK-NOT: , [[CPY1]]
84 ; CHECK: punpcklbw [[CPY2]], [[CPY2]]
85 ; CHECK-NEXT: punpckhwd [[CPY2]], [[CPY2]]
86 ; CHECK-NEXT pslld $31, [[CPY2]]
87 ; Check that CPY1 is not redefined.
88 ; CHECK-NOT: , [[CPY1]]
89 ; CHECK: punpcklbw [[CPY1]], [[CPY1]]
90 ; CHECK-NEXT: punpcklwd [[CPY1]], [[CPY1]]
91 ; CHECK-NEXT pslld $31, [[CPY1]]
92 define <16 x float> @foo(<16 x float> %x) {
94 %v3 = icmp slt <16 x i32> undef, zeroinitializer
95 %v14 = zext <16 x i1> %v3 to <16 x i32>
96 %v16 = fcmp olt <16 x float> %x, zeroinitializer
97 %v17 = sext <16 x i1> %v16 to <16 x i32>
98 %v18 = zext <16 x i1> %v16 to <16 x i32>
99 %v19 = xor <16 x i32> %v14, %v18
100 %v20 = or <16 x i32> %v17, undef
101 %v21 = fptosi <16 x float> %x to <16 x i32>
102 %v22 = sitofp <16 x i32> %v21 to <16 x float>
103 %v69 = fcmp ogt <16 x float> %v22, zeroinitializer
104 %v75 = and <16 x i1> %v69, %v3
105 %v77 = bitcast <16 x float> %v22 to <16 x i32>
106 %v79 = sext <16 x i1> %v75 to <16 x i32>
107 %v80 = and <16 x i32> undef, %v79
108 %v81 = xor <16 x i32> %v77, %v80
109 %v82 = and <16 x i32> undef, %v81
110 %v83 = xor <16 x i32> %v19, %v82
111 %v84 = and <16 x i32> %v83, %v20
112 %v85 = xor <16 x i32> %v19, %v84
113 %v86 = bitcast <16 x i32> %v85 to <16 x float>
114 ret <16 x float> %v86