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: llc < %s -enable-misched -pre-RA-sched=source -scheditins=false \
; RUN: -disable-ifcvt-triangle-false -disable-post-ra | FileCheck %s
;
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-f128:128:128-v128:128:128-n32:64"
target triple = "powerpc64-bgq-linux"
; %val1 is a load live out of %entry. It should be hoisted
; above the add.
; CHECK-LABEL: testload:
; CHECK: %entry
; CHECK: lwz
; CHECK: addi
; CHECK: bne
; CHECK: %true
define i32 @testload(i32 *%ptr, i32 %sumin) {
entry:
%sum1 = add i32 %sumin, 1
%val1 = load i32, i32* %ptr
%p = icmp eq i32 %sumin, 0
br i1 %p, label %true, label %end
true:
%sum2 = add i32 %sum1, 1
%ptr2 = getelementptr i32, i32* %ptr, i32 1
%val = load i32, i32* %ptr2
%val2 = add i32 %val1, %val
br label %end
end:
%valmerge = phi i32 [ %val1, %entry], [ %val2, %true ]
%summerge = phi i32 [ %sum1, %entry], [ %sum2, %true ]
%sumout = add i32 %valmerge, %summerge
ret i32 %sumout
}
; The prefetch gets a default latency of 3 cycles and should be hoisted
; above the add.
;
; CHECK-LABEL: testprefetch:
; CHECK: %entry
; CHECK: dcbt
; CHECK: addi
; CHECK: blr
define i32 @testprefetch(i8 *%ptr, i32 %i) {
entry:
%val1 = add i32 %i, 1
tail call void @llvm.prefetch( i8* %ptr, i32 0, i32 3, i32 1 )
%p = icmp eq i32 %i, 0
br i1 %p, label %true, label %end
true:
%val2 = add i32 %val1, 1
br label %end
end:
%valmerge = phi i32 [ %val1, %entry], [ %val2, %true ]
ret i32 %valmerge
}
declare void @llvm.prefetch(i8*, i32, i32, i32) nounwind
|
