55 lines
1.7 KiB
LLVM
55 lines
1.7 KiB
LLVM
; RUN: opt -basicaa -loop-versioning -S < %s | FileCheck %s
|
|
|
|
; A very simple case. After versioning the %loadA and %loadB can't alias with
|
|
; the store.
|
|
;
|
|
; To see it easier what's going on, I expanded every noalias/scope metadata
|
|
; reference below in a comment. For a scope I use the format scope(domain),
|
|
; e.g. scope 17 in domain 15 is written as 17(15).
|
|
|
|
; CHECK-LABEL: @f(
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
define void @f(i32* %a, i32* %b, i32* %c) {
|
|
entry:
|
|
br label %for.body
|
|
|
|
; CHECK: for.body.lver.orig:
|
|
; CHECK: for.body:
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
|
|
|
|
%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
|
|
; CHECK: %loadA = {{.*}} !alias.scope !0
|
|
; A's scope: !0 -> { 1(2) }
|
|
%loadA = load i32, i32* %arrayidxA, align 4
|
|
|
|
%arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
|
|
; CHECK: %loadB = {{.*}} !alias.scope !3
|
|
; B's scope: !3 -> { 4(2) }
|
|
%loadB = load i32, i32* %arrayidxB, align 4
|
|
|
|
%mulC = mul i32 %loadA, %loadB
|
|
|
|
%arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
|
|
; CHECK: store {{.*}} !alias.scope !5, !noalias !7
|
|
; C noalias A and B: !7 -> { 1(2), 4(2) }
|
|
store i32 %mulC, i32* %arrayidxC, align 4
|
|
|
|
%add = add nuw nsw i64 %ind, 1
|
|
%exitcond = icmp eq i64 %add, 20
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|
|
; CHECK: !0 = !{!1}
|
|
; CHECK: !1 = distinct !{!1, !2}
|
|
; CHECK: !2 = distinct !{!2, !"LVerDomain"}
|
|
; CHECK: !3 = !{!4}
|
|
; CHECK: !4 = distinct !{!4, !2}
|
|
; CHECK: !5 = !{!6}
|
|
; CHECK: !6 = distinct !{!6, !2}
|
|
; CHECK: !7 = !{!1, !4}
|