1; RUN: opt %loadPolly -polly-stmt-granularity=scalar-indep -polly-print-instructions -polly-scops -analyze < %s | FileCheck %s -match-full-lines
2;
3; Two PHIs, cross-referencing each other. The PHI READs must be carried-out
4; before the PHI WRITEs to ensure that the value when entering the block is
5; read.
6; This means that either both PHIs have to be in the same statement, or the
7; PHI WRITEs located in a statement after the PHIs.
8;
9; for (int j = 0; j < n; j += 1) {
10;    double valA = 42.0;
11;    double valB = 21.0;
12;
13; body:
14;   double tmp = valA;
15;   valA = valB;
16;   valB = tmp;
17;   A[0] = valA;
18; }
19;
20define void @func(i32 %n, double* noalias nonnull %A) {
21entry:
22  br label %for
23
24for:
25  %j = phi i32 [0, %entry], [%j.inc, %for]
26  %valA = phi double [42.0, %entry], [%valB, %for]
27  %valB = phi double [21.0, %entry], [%valA, %for]
28  store double %valA, double* %A
29  %j.cmp = icmp slt i32 %j, %n
30  %j.inc = add nuw nsw i32 %j, 1
31  br i1 %j.cmp, label %for, label %exit
32
33exit:
34  br label %return
35
36return:
37  ret void
38}
39
40
41; CHECK:      Statements {
42; CHECK-NEXT:     Stmt_for
43; CHECK-NEXT:         Domain :=
44; CHECK-NEXT:             [n] -> { Stmt_for[i0] : 0 <= i0 <= n; Stmt_for[0] : n < 0 };
45; CHECK-NEXT:         Schedule :=
46; CHECK-NEXT:             [n] -> { Stmt_for[i0] -> [i0] : i0 <= n; Stmt_for[0] -> [0] : n < 0 };
47; CHECK-NEXT:         MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
48; CHECK-NEXT:             [n] -> { Stmt_for[i0] -> MemRef_valA__phi[] };
49; CHECK-NEXT:         ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
50; CHECK-NEXT:             [n] -> { Stmt_for[i0] -> MemRef_valA__phi[] };
51; CHECK-NEXT:         MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
52; CHECK-NEXT:             [n] -> { Stmt_for[i0] -> MemRef_valB__phi[] };
53; CHECK-NEXT:         ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
54; CHECK-NEXT:             [n] -> { Stmt_for[i0] -> MemRef_valB__phi[] };
55; CHECK-NEXT:         MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
56; CHECK-NEXT:             [n] -> { Stmt_for[i0] -> MemRef_A[0] };
57; CHECK-NEXT:         Instructions {
58; CHECK-NEXT:               %valA = phi double [ 4.200000e+01, %entry ], [ %valB, %for ]
59; CHECK-NEXT:               %valB = phi double [ 2.100000e+01, %entry ], [ %valA, %for ]
60; CHECK-NEXT:               store double %valA, double* %A, align 8
61; CHECK-NEXT:         }
62; CHECK-NEXT: }
63