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
|
; RUN: opt -domtree -instcombine -loops -S < %s | FileCheck %s
; Note: The -loops above can be anything that requires the domtree, and is
; necessary to work around a pass-manager bug.
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
%struct.s = type { double* }
; Function Attrs: nounwind uwtable
define void @_Z3fooR1s(%struct.s* nocapture readonly dereferenceable(8) %x) #0 {
; CHECK-LABEL: @_Z3fooR1s
; CHECK: call void @llvm.assume
; CHECK-NOT: call void @llvm.assume
entry:
%a = getelementptr inbounds %struct.s, %struct.s* %x, i64 0, i32 0
%0 = load double*, double** %a, align 8
%ptrint = ptrtoint double* %0 to i64
%maskedptr = and i64 %ptrint, 31
%maskcond = icmp eq i64 %maskedptr, 0
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.1, %for.body ]
tail call void @llvm.assume(i1 %maskcond)
%arrayidx = getelementptr inbounds double, double* %0, i64 %indvars.iv
%1 = load double, double* %arrayidx, align 16
%add = fadd double %1, 1.000000e+00
tail call void @llvm.assume(i1 %maskcond)
%mul = fmul double %add, 2.000000e+00
store double %mul, double* %arrayidx, align 16
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
tail call void @llvm.assume(i1 %maskcond)
%arrayidx.1 = getelementptr inbounds double, double* %0, i64 %indvars.iv.next
%2 = load double, double* %arrayidx.1, align 8
%add.1 = fadd double %2, 1.000000e+00
tail call void @llvm.assume(i1 %maskcond)
%mul.1 = fmul double %add.1, 2.000000e+00
store double %mul.1, double* %arrayidx.1, align 8
%indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
%exitcond.1 = icmp eq i64 %indvars.iv.next, 1599
br i1 %exitcond.1, label %for.end, label %for.body
for.end: ; preds = %for.body
ret void
}
declare align 8 i8* @get()
; Check that redundant align assume is removed
; CHECK-LABEL: @test
; CHECK-NOT: call void @llvm.assume
define void @test1() {
%p = call align 8 i8* @get()
%ptrint = ptrtoint i8* %p to i64
%maskedptr = and i64 %ptrint, 7
%maskcond = icmp eq i64 %maskedptr, 0
call void @llvm.assume(i1 %maskcond)
ret void
}
; Check that redundant align assume is removed
; CHECK-LABEL: @test
; CHECK-NOT: call void @llvm.assume
define void @test3() {
%p = alloca i8, align 8
%ptrint = ptrtoint i8* %p to i64
%maskedptr = and i64 %ptrint, 7
%maskcond = icmp eq i64 %maskedptr, 0
call void @llvm.assume(i1 %maskcond)
ret void
}
; Function Attrs: nounwind
declare void @llvm.assume(i1) #1
attributes #0 = { nounwind uwtable }
attributes #1 = { nounwind }
|
