large-stride.ll
2.83 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
; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -loop-data-prefetch -max-prefetch-iters-ahead=100 -S < %s | FileCheck %s --check-prefix=LARGE_PREFETCH --check-prefix=ALL
; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -loop-data-prefetch -S < %s | FileCheck %s --check-prefix=NO_LARGE_PREFETCH --check-prefix=ALL
; RUN: opt -mcpu=generic -mtriple=arm64-apple-ios -loop-data-prefetch -S < %s | FileCheck %s --check-prefix=NO_LARGE_PREFETCH --check-prefix=ALL
; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -passes=loop-data-prefetch -max-prefetch-iters-ahead=100 -S < %s | FileCheck %s --check-prefix=LARGE_PREFETCH --check-prefix=ALL
; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -passes=loop-data-prefetch -S < %s | FileCheck %s --check-prefix=NO_LARGE_PREFETCH --check-prefix=ALL
; RUN: opt -mcpu=generic -mtriple=arm64-apple-ios -passes=loop-data-prefetch -S < %s | FileCheck %s --check-prefix=NO_LARGE_PREFETCH --check-prefix=ALL
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32:64-S128"
; ALL-LABEL: @small_stride(
define void @small_stride(double* nocapture %a, double* nocapture readonly %b) {
entry:
br label %for.body
; ALL: for.body:
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds double, double* %b, i64 %indvars.iv
; ALL-NOT: call void @llvm.prefetch
%0 = load double, double* %arrayidx, align 8
%add = fadd double %0, 1.000000e+00
%arrayidx2 = getelementptr inbounds double, double* %a, i64 %indvars.iv
store double %add, double* %arrayidx2, align 8
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond = icmp eq i64 %indvars.iv.next, 1600
br i1 %exitcond, label %for.end, label %for.body
; ALL: for.end:
for.end: ; preds = %for.body
ret void
}
; ALL-LABEL: @large_stride(
define void @large_stride(double* nocapture %a, double* nocapture readonly %b) {
entry:
br label %for.body
; ALL: for.body:
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds double, double* %b, i64 %indvars.iv
; LARGE_PREFETCH: call void @llvm.prefetch
; NO_LARGE_PREFETCH-NOT: call void @llvm.prefetch
%0 = load double, double* %arrayidx, align 8
%add = fadd double %0, 1.000000e+00
%arrayidx2 = getelementptr inbounds double, double* %a, i64 %indvars.iv
store double %add, double* %arrayidx2, align 8
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 300
%exitcond = icmp eq i64 %indvars.iv.next, 160000
br i1 %exitcond, label %for.end, label %for.body
; ALL: for.end:
for.end: ; preds = %for.body
ret void
}