xref: /llvm-project/polly/test/Simplify/redundant.ll (revision e1f056f692d869708c1898d9d65a69ac5584a0ed)
1; RUN: opt %loadNPMPolly "-passes=scop(print<polly-simplify>)" -disable-output -aa-pipeline=basic-aa < %s | FileCheck %s -match-full-lines
2;
3; Remove redundant store (a store that writes the same value already
4; at the destination)
5;
6; for (int j = 0; j < n; j += 1)
7;   A[0] = A[0];
8;
9define void @func(i32 %n, ptr noalias nonnull %A) {
10entry:
11  br label %for
12
13for:
14  %j = phi i32 [0, %entry], [%j.inc, %inc]
15  %j.cmp = icmp slt i32 %j, %n
16  br i1 %j.cmp, label %body, label %exit
17
18    body:
19      %val = load double, ptr %A
20      store double %val, ptr %A
21      br label %inc
22
23inc:
24  %j.inc = add nuw nsw i32 %j, 1
25  br label %for
26
27exit:
28  br label %return
29
30return:
31  ret void
32}
33
34
35; CHECK: Statistics {
36; CHECK:     Redundant writes removed: 1
37; CHECK:     Stmts removed: 1
38; CHECK: }
39
40; CHECK:      After accesses {
41; CHECK-NEXT: }
42