uniform-phi.ll
3.95 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7 -debug-only=loop-vectorize -S 2>&1 | FileCheck %s
; REQUIRES: asserts
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; CHECK-LABEL: test
; CHECK-DAG: LV: Found uniform instruction: %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
; CHECK-DAG: LV: Found uniform instruction: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; CHECK-DAG: LV: Found uniform instruction: %exitcond = icmp eq i64 %indvars.iv, 1599
define void @test(float* noalias nocapture %a, float* noalias nocapture readonly %b) #0 {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds float, float* %b, i64 %indvars.iv
%tmp0 = load float, float* %arrayidx, align 4
%add = fadd float %tmp0, 1.000000e+00
%arrayidx5 = getelementptr inbounds float, float* %a, i64 %indvars.iv
store float %add, float* %arrayidx5, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv, 1599
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
}
; CHECK-LABEL: foo
; CHECK-DAG: LV: Found uniform instruction: %cond = icmp eq i64 %i.next, %n
; CHECK-DAG: LV: Found uniform instruction: %tmp1 = getelementptr inbounds i32, i32* %a, i32 %tmp0
; CHECK-NOT: LV: Found uniform instruction: %i = phi i64 [ %i.next, %for.body ], [ 0, %entry ]
define void @foo(i32* %a, i64 %n) {
entry:
br label %for.body
for.body:
%i = phi i64 [ %i.next, %for.body ], [ 0, %entry ]
%tmp0 = trunc i64 %i to i32
%tmp1 = getelementptr inbounds i32, i32* %a, i32 %tmp0
store i32 %tmp0, i32* %tmp1, align 4
%i.next = add nuw nsw i64 %i, 1
%cond = icmp eq i64 %i.next, %n
br i1 %cond, label %for.end, label %for.body
for.end:
ret void
}
; CHECK-LABEL: goo
; Check %indvars.iv and %indvars.iv.next are uniform instructions even if they are used outside of loop.
; CHECK-DAG: LV: Found uniform instruction: %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
; CHECK-DAG: LV: Found uniform instruction: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
; CHECK-DAG: LV: Found uniform instruction: %exitcond = icmp eq i64 %indvars.iv, 1599
define i64 @goo(float* noalias nocapture %a, float* noalias nocapture readonly %b) #0 {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds float, float* %b, i64 %indvars.iv
%tmp0 = load float, float* %arrayidx, align 4
%add = fadd float %tmp0, 1.000000e+00
%arrayidx5 = getelementptr inbounds float, float* %a, i64 %indvars.iv
store float %add, float* %arrayidx5, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv, 1599
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
%retval = add i64 %indvars.iv, %indvars.iv.next
ret i64 %retval
}
; CHECK-LABEL: PR38786
; Check that first order recurrence phis (%phi32 and %phi64) are not uniform.
; CHECK-NOT: LV: Found uniform instruction: %phi
define void @PR38786(double* %y, double* %x, i64 %n) {
entry:
br label %for.body
for.body:
%phi32 = phi i32 [ 0, %entry ], [ %i32next, %for.body ]
%phi64 = phi i64 [ 0, %entry ], [ %i64next, %for.body ]
%i32next = add i32 %phi32, 1
%i64next = zext i32 %i32next to i64
%xip = getelementptr inbounds double, double* %x, i64 %i64next
%yip = getelementptr inbounds double, double* %y, i64 %phi64
%xi = load double, double* %xip, align 8
store double %xi, double* %yip, align 8
%cmp = icmp slt i64 %i64next, %n
br i1 %cmp, label %for.body, label %for.end
for.end:
ret void
}