1 ; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-print-optree -disable-output < %s | FileCheck %s -match-full-lines
3 ; To forward %val, B[j] cannot be reused in bodyC because it is overwritten
4 ; between. Verify that instead the alternative C[j] is used.
6 ; for (int j = 0; j < n; j += 1) {
18 define void @func(i32 %n, ptr noalias nonnull %A, ptr noalias nonnull %B, ptr noalias nonnull %C) {
23 %j = phi i32 [0, %entry], [%j.inc, %inc]
24 %j.cmp = icmp slt i32 %j, %n
25 br i1 %j.cmp, label %bodyA, label %exit
28 %B_idx = getelementptr inbounds double, ptr %B, i32 %j
29 %val = load double, ptr %B_idx
33 store double 0.0, ptr %B_idx
34 %C_idx = getelementptr inbounds double, ptr %C, i32 %j
35 store double %val, ptr %C_idx
39 %A_idx = getelementptr inbounds double, ptr %A, i32 %j
40 store double %val, ptr %A_idx
44 %j.inc = add nuw nsw i32 %j, 1
56 ; CHECK: Known loads forwarded: 2
57 ; CHECK: Operand trees forwarded: 2
58 ; CHECK: Statements with forwarded operand trees: 2
61 ; CHECK-NEXT: After statements {
62 ; CHECK-NEXT: Stmt_bodyA
63 ; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
64 ; CHECK-NEXT: [n] -> { Stmt_bodyA[i0] -> MemRef_B[i0] };
65 ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
66 ; CHECK-NEXT: [n] -> { Stmt_bodyA[i0] -> MemRef_val[] };
67 ; CHECK-NEXT: Instructions {
68 ; CHECK-NEXT: %val = load double, ptr %B_idx, align 8
70 ; CHECK-NEXT: Stmt_bodyB
71 ; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
73 ; CHECK-NEXT: new: [n] -> { Stmt_bodyB[i0] -> MemRef_B[i0] };
74 ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
75 ; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_B[i0] };
76 ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
77 ; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_C[i0] };
78 ; CHECK-NEXT: Instructions {
79 ; CHECK-NEXT: %val = load double, ptr %B_idx, align 8
80 ; CHECK-NEXT: store double 0.000000e+00, ptr %B_idx, align 8
81 ; CHECK-NEXT: store double %val, ptr %C_idx, align 8
83 ; CHECK-NEXT: Stmt_bodyC
84 ; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
86 ; CHECK-NEXT: new: [n] -> { Stmt_bodyC[i0] -> MemRef_C[i0] };
87 ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
88 ; CHECK-NEXT: [n] -> { Stmt_bodyC[i0] -> MemRef_A[i0] };
89 ; CHECK-NEXT: Instructions {
90 ; CHECK-NEXT: %val = load double, ptr %B_idx, align 8
91 ; CHECK-NEXT: store double %val, ptr %A_idx, align 8