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; RUN: opt < %s -store-to-load-forwarding-conflict-detection=false -loop-accesses -analyze | FileCheck %s
; RUN: opt -passes='require<scalar-evolution>,require<aa>,loop(print-access-info)' -store-to-load-forwarding-conflict-detection=false -disable-output < %s 2>&1 | FileCheck %s
; This test checks that we prove the strided accesses to be independent before
; concluding that there is a forward dependence.
; struct pair {
; int x;
; int y;
; };
;
; int independent_interleaved(struct pair *p, int z, int n) {
; int s = 0;
; for (int i = 0; i < n; i++) {
; p[i].y = z;
; s += p[i].x;
; }
; return s;
; }
; CHECK: for.body:
; CHECK-NOT: Forward:
; CHECK-NOT: store i32 %z, i32* %p_i.y, align 8 ->
; CHECK-NOT: %0 = load i32, i32* %p_i.x, align 8
%pair = type { i32, i32 }
define i32 @independent_interleaved(%pair *%p, i64 %n, i32 %z) {
entry:
br label %for.body
for.body:
%i = phi i64 [ %i.next, %for.body ], [ 0, %entry ]
%s = phi i32 [ %1, %for.body ], [ 0, %entry ]
%p_i.x = getelementptr inbounds %pair, %pair* %p, i64 %i, i32 0
%p_i.y = getelementptr inbounds %pair, %pair* %p, i64 %i, i32 1
store i32 %z, i32* %p_i.y, align 8
%0 = load i32, i32* %p_i.x, align 8
%1 = add nsw i32 %0, %s
%i.next = add nuw nsw i64 %i, 1
%cond = icmp slt i64 %i.next, %n
br i1 %cond, label %for.body, label %for.end
for.end:
%2 = phi i32 [ %1, %for.body ]
ret i32 %2
}
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