1 ; RUN: opt < %s -S -loop-unroll -mcpu=nehalem | FileCheck %s
2 ; RUN: opt < %s -S -loop-unroll -unroll-runtime=0 | FileCheck -check-prefix=CHECK-NOUNRL %s
3 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4 target triple = "x86_64-unknown-linux-gnu"
6 define void @foo(i32* noalias nocapture readnone %ip, double %alpha, double* noalias nocapture %a, double* noalias nocapture readonly %b) #0 {
10 vector.body: ; preds = %vector.body, %entry
11 %index = phi i64 [ 0, %entry ], [ %index.next, %vector.body ]
12 %0 = getelementptr inbounds double, double* %b, i64 %index
13 %1 = bitcast double* %0 to <2 x double>*
14 %wide.load = load <2 x double>, <2 x double>* %1, align 8
15 %.sum9 = or i64 %index, 2
16 %2 = getelementptr double, double* %b, i64 %.sum9
17 %3 = bitcast double* %2 to <2 x double>*
18 %wide.load8 = load <2 x double>, <2 x double>* %3, align 8
19 %4 = fadd <2 x double> %wide.load, <double 1.000000e+00, double 1.000000e+00>
20 %5 = fadd <2 x double> %wide.load8, <double 1.000000e+00, double 1.000000e+00>
21 %6 = getelementptr inbounds double, double* %a, i64 %index
22 %7 = bitcast double* %6 to <2 x double>*
23 store <2 x double> %4, <2 x double>* %7, align 8
24 %.sum10 = or i64 %index, 2
25 %8 = getelementptr double, double* %a, i64 %.sum10
26 %9 = bitcast double* %8 to <2 x double>*
27 store <2 x double> %5, <2 x double>* %9, align 8
28 %index.next = add i64 %index, 4
29 %10 = icmp eq i64 %index.next, 1600
30 br i1 %10, label %for.end, label %vector.body
32 ; FIXME: We should probably unroll this loop by a factor of 2, but the cost
33 ; model needs to be fixed to account for instructions likely to be folded
34 ; as part of an addressing mode.
36 ; CHECK-NOUNRL-LABEL: @foo
38 for.end: ; preds = %vector.body
42 define void @bar(i32* noalias nocapture readnone %ip, double %alpha, double* noalias nocapture %a, double* noalias nocapture readonly %b) #0 {
46 vector.body: ; preds = %vector.body, %entry
47 %index = phi i64 [ 0, %entry ], [ %index.next, %vector.body ]
48 %v0 = getelementptr inbounds double, double* %b, i64 %index
49 %v1 = bitcast double* %v0 to <2 x double>*
50 %wide.load = load <2 x double>, <2 x double>* %v1, align 8
51 %v4 = fadd <2 x double> %wide.load, <double 1.000000e+00, double 1.000000e+00>
52 %v5 = fmul <2 x double> %v4, <double 8.000000e+00, double 8.000000e+00>
53 %v6 = getelementptr inbounds double, double* %a, i64 %index
54 %v7 = bitcast double* %v6 to <2 x double>*
55 store <2 x double> %v5, <2 x double>* %v7, align 8
56 %index.next = add i64 %index, 2
57 %v10 = icmp eq i64 %index.next, 1600
58 br i1 %v10, label %for.end, label %vector.body
60 ; FIXME: We should probably unroll this loop by a factor of 2, but the cost
61 ; model needs to first to fixed to account for instructions likely to be folded
62 ; as part of an addressing mode.
70 ; CHECK-NOUNRL-LABEL: @bar
72 ; CHECK-NOUNRL-NEXT: fmul
73 ; CHECK-NOUNRL-NOT: fadd
75 for.end: ; preds = %vector.body
79 define zeroext i16 @test1(i16* nocapture readonly %arr, i32 %n) #0 {
81 %cmp25 = icmp eq i32 %n, 0
82 br i1 %cmp25, label %for.end, label %for.body
84 for.body: ; preds = %entry, %for.body
85 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
86 %reduction.026 = phi i16 [ %add14, %for.body ], [ 0, %entry ]
87 %arrayidx = getelementptr inbounds i16, i16* %arr, i64 %indvars.iv
88 %0 = load i16, i16* %arrayidx, align 2
90 %add = add i16 %mul, %reduction.026
91 %sext = mul i64 %indvars.iv, 12884901888
92 %idxprom3 = ashr exact i64 %sext, 32
93 %arrayidx4 = getelementptr inbounds i16, i16* %arr, i64 %idxprom3
94 %1 = load i16, i16* %arrayidx4, align 2
96 %add7 = add i16 %add, %mul2
97 %sext28 = mul i64 %indvars.iv, 21474836480
98 %idxprom10 = ashr exact i64 %sext28, 32
99 %arrayidx11 = getelementptr inbounds i16, i16* %arr, i64 %idxprom10
100 %2 = load i16, i16* %arrayidx11, align 2
101 %mul3 = shl i16 %2, 1
102 %add14 = add i16 %add7, %mul3
103 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
104 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
105 %exitcond = icmp eq i32 %lftr.wideiv, %n
106 br i1 %exitcond, label %for.end, label %for.body
108 for.end: ; preds = %for.body, %entry
109 %reduction.0.lcssa = phi i16 [ 0, %entry ], [ %add14, %for.body ]
110 ret i16 %reduction.0.lcssa
112 ; This loop is too large to be partially unrolled (size=16)
114 ; CHECK-LABEL: @test1
121 ; CHECK-NOUNRL-LABEL: @test1
126 ; CHECK-NOUNRL-NOT: br
129 attributes #0 = { nounwind uwtable }