forked from OSchip/llvm-project
79 lines
2.2 KiB
LLVM
79 lines
2.2 KiB
LLVM
; RUN: opt -basicaa -loop-vectorize -force-vector-width=2 \
|
|
; RUN: -force-vector-interleave=1 -S < %s \
|
|
; RUN: | FileCheck %s -check-prefix=BOTH -check-prefix=LV
|
|
; RUN: opt -basicaa -scoped-noalias -loop-vectorize -dse -force-vector-width=2 \
|
|
; RUN: -force-vector-interleave=1 -S < %s \
|
|
; RUN: | FileCheck %s -check-prefix=BOTH -check-prefix=DSE
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
; This loop needs to be versioned with memchecks between {A, B} x {C} before
|
|
; it can be vectorized.
|
|
;
|
|
; for (i = 0; i < n; i++) {
|
|
; C[i] = A[i] + 1;
|
|
; C[i] += B[i];
|
|
; }
|
|
;
|
|
; Check that the corresponding noalias metadata is added to the vector loop
|
|
; but not to the scalar loop.
|
|
;
|
|
; Since in the versioned vector loop C and B can no longer alias, the first
|
|
; store to C[i] can be DSE'd.
|
|
|
|
|
|
define void @f(i32* %a, i32* %b, i32* %c) {
|
|
entry:
|
|
br label %for.body
|
|
|
|
; BOTH: vector.memcheck:
|
|
; BOTH: vector.body:
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %inc, %for.body ]
|
|
|
|
%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
|
|
; Scope 1
|
|
; LV: = load {{.*}} !alias.scope !0
|
|
%loadA = load i32, i32* %arrayidxA, align 4
|
|
|
|
%add = add nuw i32 %loadA, 2
|
|
|
|
%arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
|
|
; Noalias with scope 1 and 6
|
|
; LV: store {{.*}} !alias.scope !3, !noalias !5
|
|
; DSE-NOT: store
|
|
store i32 %add, i32* %arrayidxC, align 4
|
|
|
|
%arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
|
|
; Scope 6
|
|
; LV: = load {{.*}} !alias.scope !7
|
|
%loadB = load i32, i32* %arrayidxB, align 4
|
|
|
|
%add2 = add nuw i32 %add, %loadB
|
|
|
|
; Noalias with scope 1 and 6
|
|
; LV: store {{.*}} !alias.scope !3, !noalias !5
|
|
; DSE: store
|
|
store i32 %add2, i32* %arrayidxC, align 4
|
|
|
|
%inc = add nuw nsw i64 %ind, 1
|
|
%exitcond = icmp eq i64 %inc, 20
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
; BOTH: for.body:
|
|
; BOTH-NOT: !alias.scope
|
|
; BOTH-NOT: !noalias
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|
|
|
|
; LV: !0 = !{!1}
|
|
; LV: !1 = distinct !{!1, !2}
|
|
; LV: !2 = distinct !{!2, !"LVerDomain"}
|
|
; LV: !3 = !{!4}
|
|
; LV: !4 = distinct !{!4, !2}
|
|
; LV: !5 = !{!1, !6}
|
|
; LV: !6 = distinct !{!6, !2}
|
|
; LV: !7 = !{!6}
|