1 ; RUN: opt -domtree -instcombine -loops -S < %s | FileCheck %s
2 ; Note: The -loops above can be anything that requires the domtree, and is
3 ; necessary to work around a pass-manager bug.
5 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
6 target triple = "x86_64-unknown-linux-gnu"
8 %struct.s = type { double* }
10 ; Function Attrs: nounwind uwtable
11 define void @_Z3fooR1s(%struct.s* nocapture readonly dereferenceable(8) %x) #0 {
13 ; CHECK-LABEL: @_Z3fooR1s
14 ; CHECK: call void @llvm.assume
15 ; CHECK-NOT: call void @llvm.assume
18 %a = getelementptr inbounds %struct.s, %struct.s* %x, i64 0, i32 0
19 %0 = load double*, double** %a, align 8
20 %ptrint = ptrtoint double* %0 to i64
21 %maskedptr = and i64 %ptrint, 31
22 %maskcond = icmp eq i64 %maskedptr, 0
25 for.body: ; preds = %for.body, %entry
26 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next.1, %for.body ]
27 tail call void @llvm.assume(i1 %maskcond)
28 %arrayidx = getelementptr inbounds double, double* %0, i64 %indvars.iv
29 %1 = load double, double* %arrayidx, align 16
30 %add = fadd double %1, 1.000000e+00
31 tail call void @llvm.assume(i1 %maskcond)
32 %mul = fmul double %add, 2.000000e+00
33 store double %mul, double* %arrayidx, align 16
34 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
35 tail call void @llvm.assume(i1 %maskcond)
36 %arrayidx.1 = getelementptr inbounds double, double* %0, i64 %indvars.iv.next
37 %2 = load double, double* %arrayidx.1, align 8
38 %add.1 = fadd double %2, 1.000000e+00
39 tail call void @llvm.assume(i1 %maskcond)
40 %mul.1 = fmul double %add.1, 2.000000e+00
41 store double %mul.1, double* %arrayidx.1, align 8
42 %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv.next, 1
43 %exitcond.1 = icmp eq i64 %indvars.iv.next, 1599
44 br i1 %exitcond.1, label %for.end, label %for.body
46 for.end: ; preds = %for.body
50 declare align 8 i8* @get()
52 ; Check that redundant align assume is removed
54 ; CHECK-NOT: call void @llvm.assume
55 define void @test1() {
56 %p = call align 8 i8* @get()
57 %ptrint = ptrtoint i8* %p to i64
58 %maskedptr = and i64 %ptrint, 7
59 %maskcond = icmp eq i64 %maskedptr, 0
60 call void @llvm.assume(i1 %maskcond)
64 ; Check that redundant align assume is removed
66 ; CHECK-NOT: call void @llvm.assume
67 define void @test3() {
68 %p = alloca i8, align 8
69 %ptrint = ptrtoint i8* %p to i64
70 %maskedptr = and i64 %ptrint, 7
71 %maskcond = icmp eq i64 %maskedptr, 0
72 call void @llvm.assume(i1 %maskcond)
76 ; Function Attrs: nounwind
77 declare void @llvm.assume(i1) #1
79 attributes #0 = { nounwind uwtable }
80 attributes #1 = { nounwind }